Method of producing inorganic chromatic pigment

FIELD: chemistry.

SUBSTANCE: production wastes are dried and ground to the required fineness. The production wastes used are in form of sludge from clarification tanks of thermal power stations formed during liming and coagulation of raw water on a water treatment plant. The sludge is dried at temperature 200-250°C for 3-3.5 hours.

EFFECT: method enables to obtain a cheap inorganic chromatic pigment, reduces the cost of paint materials by simplifying the process of producing the pigment and using readily available and cheap production wastes, which enables to solve the problem of recycling sludge from clarification tanks of thermal power plants.

2 tbl, 6 ex

 

The invention relates to a technology for inorganic pigments from waste products and can be used in various industries, in particular in the manufacture of paints and varnishes.

Use as pigment production sludge is a promising direction in the development of the chemistry of paints and varnishes. In world practice, the most widely as chromatic pigments in paints, varnishes, enamels are inorganic compounds: iron oxide, chromium oxide, titanium dioxide, zinc white, calcium carbonates, chromates of lead and zinc (Technology varnishes and paints. / Overlove, Angorichina. M.: Chemistry, 1990).

However, the most widely used chromium - and lead-containing pigments have high toxicity. Environmentally friendly alternative to these pigments are iron oxides. Recently, however, due to the depletion of the resource base is significantly more expensive pigments, so more attention stood on receipt of pigments from waste products (Kotelnikov BORN and other coating materials and their application. 1998, No. 6, 6.8-10). On the one hand, many of technogenic wastes contain valuable components, and on the other, they create in the places of storage of environmental problems.

Closest to the proposed izaberete the Oia is a method of obtaining a pigment-based waste production by RF patent No. 2391365, IPC SS 1/24, SS 1/02, 10.05.2010, including drying and calcining and grinding to the desired degree of dispersion, the waste use waste electric furnaces foundry - suction dust containing oxides of iron, silicon. aluminum, calcium, magnesium, which is mixed with calcium hydroxide in water.

The disadvantage of this method is the complexity of the technological process of production of a pigment and, therefore, the high cost of pigment and paint materials.

The problem to which the invention is directed, is to obtain cheap inorganic chromatic pigments, reducing the cost of paint materials by simplifying the technological process of production of a pigment and the use of more accessible and affordable waste production.

The technical result is achieved in that in a method of producing inorganic chromatic pigment-based waste production, including drying and grinding to the desired degree of dispersion, according to the present invention as waste production use sludge clarifiers thermal power stations generated during liming and coagulation of raw water treatment installation of thermal power stations, thus drying the slurry to produce thermal electricity the ski stations at a temperature of 200-250°C for 3-3,5 hours.

Known application of sludge clarifiers thermal power plants (TPP) as an additive for fuel oils (RF patent No. 2363722, C10L 1/12, 2009). The chemical composition of the sludge clarifiers thermal power stations are products of liming and coagulation: caso3+MgO+Mg(OH)2+SiO2+Fe(OH)3+Al(Oh)3.

The resulting pigment is a highly dispersible powder yellow-brown color.

Examples of specific performance are shown in table 1.

Table 1
Conditions for obtaining the pigment of the proposed method
Number exampleThe moisture content, %Drying conditions
Temperature, °CTime, h
1101104,5
2101504
332003,5
4 32503
533002,5
62,53502

As can be seen from examples of specific performance obtained by the present method pigments (examples 3, 4, 5) moisture content consistent with the requirements of pigments entered in varnishes, paints, enamels, in particular in alkyd pentaftalevyh enamel PF - 266.

Experimental studies have shown that inorganic chromatic pigment obtained according to the present invention, is easily introduced into the enamel to 50 mass percent. The tests were carried out at the plant "Heaton" Kazan for alkyd pentaftalevyh enamel PF - 266.

The table presents the properties of the alkyd pentaftalevyh enamel PF - 266 with inorganic chromatic pigment obtained according to the present invention, and the control sample enamel PF - 266 with pigment "Monohydrate iron oxide α-form yellow-brown Derby, used for the floor. The dispersion of pigment-based production waste - sludge clarifiers TPP was carried out on a laboratory mill to achieve the degree of milling of 50 μm. Goto the flanged enamel tested on indicators for compliance with the technical conditions (table 2). The resulting enamel PF - 266 with pigment-based sludge clarifiers TPP can be used for a floor covering at a temperature of 18-22°C.

With the introduction of pigment-based production waste - sludge clarifiers TPP - alkyd pentaftalevyh enamel coating color, viscosity, degree of milling, the brilliance of the film conform to the norms of the control sample alkyd pentaftalevyh enamel with monohydrate iron oxide α-form.

Experimental studies have shown that the pigment-based sludge clarifiers TPP entered in alkyd pentaftalevyh enamel PF - 266 to 50% by weight of the enamel, allows to obtain enamel, appropriate technical conditions. The cost of the enamel is reduced due to the replacement of the standard pigment "Monohydrate iron oxide α-form" cheaper by the pigment-based sludge clarifiers TPP. The cost of the pigment-based sludge clarifiers TPP is 1000 rubles per 1 ton, and the cost of the pigment "Monohydrate iron oxide α-form - 40,000 roubles per 1 tonne (data 2010).

In the field of energy sludge clarifiers TPP formed by liming and coagulation of raw water treatment installation of thermal power plants, and has already dried on the TPP at a temperature of 200-250°C for 3-3,5 hours, up to the present time is not used. But, given the traveler to its great number, sludge clarifiers TPP is available and cheap raw materials for use as raw material for the production of inorganic chromatic pigments.

Thus, the use of the proposed method to obtain cheap inorganic chromatic pigments to reduce the cost of paint materials by simplifying the technological process of production of a pigment and the use of more accessible and affordable waste production.

The method of obtaining inorganic chromatic pigment-based waste production, including drying and grinding to the desired degree of dispersion, characterized in that as a waste use sludge clarifiers thermal power stations generated during liming and coagulation of raw water treatment installation of thermal power plants, sludge drying is carried out at a temperature of 200-250°C for 3-3,5 hours



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to production of high-strength inorganic pigments which can be used to produce paint materials. The method of producing an iron-calcium pigment involves neutralisation of iron-containing spent solutions, containing sulphuric acid, with a calcium-containing reagent with deposition of a precipitate, filtration and drying the precipitate. The iron-containing spent solution used is waste water from abandoned deposits of iron-copper-zinc sulphide ores containing iron (III) sulphate and sulphuric acid. The waste water is neutralised until achieving reaction mixture pH of 4-5.

EFFECT: simple process and recycling of under-waste dump and quarry water from spent complex deposits.

2 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The method of production of natural red iron oxide pigment from ore includes its reduction, cleaning using the method of magnetic separation and repeated reduction. The ore used can be hematite, martite, hydrohematite. First the ore is reduced to size no less than 10 mm, then it is reduced using wet method to particle size of 60-80% class smaller than 40 μm and is classified in 4 stages. Elutriation includes main elutriation, first rewashing, first control and second control hydrocycling. Then the oxidative destruction of sulfides contained in the ore is performed, as well as thickening and drying with simultaneous disintegration and dry elutriation of pigment.

EFFECT: increased pigment output, production environmental friendliness, decreased sulfur content in pigment and decreased waste amount.

1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention can be used to produce magnesium chloride, silica and red pigment. Serpentinite calcined at 680-750°C is treated with 4-8% hydrochloric acid solution with weight ratio of serpentinite to hydrochloric acid equal to 1:(15-40). The hot pulp is then decanted and filtered. The residue is dried to obtain silica, the filtrate is evaporated and silicic acid is separated. After separating silicic acid in form of sol-gel, hydrochloric acid is added to a solution containing magnesium and iron (III) chlorides until 4-8% hydrochloric acid solution is obtained. The obtained hydrochloric acid solution is used to treat a new portion of serpentinite. Further, the decantation, filtration, evaporation of filtrate, separation of silicic acid and treatment of the obtained solution with hydrochloric acid are repeated 3-5 times using new portions of calcined serpentinite. The solution concentrated that way at 90°C is mixed with serpentinite and filtered. Magnesium chloride is separated from the residue which contains iron (III) hydroxide. Said residue is treated at 350-400°C to obtain red pigment.

EFFECT: invention simplifies the processing serpentinite, improves environmental safety and reduces expenses and wastes.

1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: to prepare iron oxide pigments, wastes formed during hydraulic borehole mining for iron ore in form of mud containing martite, iron mica, goethite, magnetite and chamosite are mixed with a superplasticiser in ratio of 1:0.05 and wet grinding is carried out. Thermal treatment is then carried out for 1-1.5 hours at 100-150°C and next grinding is carried out in a disintegrator to obtain a 0.8-1.0 mcm fraction of the composition. The obtained iron oxide pigment has a brick-red colour, density of 4.42 g/cm3 and low oil consumption.

EFFECT: invention enables recycling of mining wastes and reduces power consumption.

1 ex

FIELD: chemistry.

SUBSTANCE: to obtain an iron-containing pigment, aqueous solutions of sodium or ammonium carbonate and magnesium chloride or sulphate are first mixed in equimolar ratio. A magnesium carbonate pulp is obtained and settled. After that the clear portion is decanted and washed 2-3 times with water in volume ratio pulp : water=1:(2-3), each time decanting the clear portion. Iron (III) sulphate solution is then added to the magnesium carbonate pulp. The obtained residue of iron hydroxides or hydroxocarbonates is filtered off, washed with water, dried and annealed.

EFFECT: invention increases output when preparing a pigment owing to 2-3 times faster filtration of the iron-containing residue.

2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in making paint, construction and ceramic materials, glass, enamel, plastic and rubber. The iron oxide based pigment contains two fractions of iron (III) oxide. The first fraction has a plastic structure with particle size not smaller than 20 mcm. The second fraction consists of particles of different shapes with size not bigger than 20 mcm. The said components of the pigment are in the following ratio in wt %: iron (III) oxide of the first fraction with plastic structure 3-97, iron (III) oxide of the second fraction with particles of different shapes 97-3.

EFFECT: invention enables to obtain a grey coloured pigment with metallic lustre to red, increases corrosion resistance and wear resistance of the paint coatings, reduces opaqueness and oil absorption.

9 cl, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to protection of metals from corrosion using lacquer coatings. The engineering problem is solved using a method of preparing an anticorrosion pigment based on aspiration dust wastes from foundry electric furnaces. The aspiration dust is mixed with calcium hydroxide in water with content of calcium hydroxide in the mixture with aspiration dust equal to 8-11 wt %, and aspiration dust with calcium hydroxide in water is taken in ratio of 1:1 respectively. The obtained mixture is dried, calcined at 820-900°C for 3.5-5.5 hours and then ground up to the required degree of dispersion.

EFFECT: possibility of simplifying preparation of a highly efficient anticorrosion pigment and without presence of toxic components in it, as well as reduction of cost of the pigment and environmental conservation.

1 cl, 2 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: method for preparation of iron oxide pigment from specularite includes specularite milling up to particle size more than 1 mm - 5 mm, after material concentration with magnetic separation up to content of α-Fe2O3 more than 60.0 wt % specularite is concentrated again. Concentrated specularite can serve as starting material for obtaining of pigment with dull luster consisting of iron mica with Fe2O3 content more than 85 wt % which includes thin scaly plates in amount more than 50 wt % and is featured with residue after wet sieving on a sieve with mesh size 63 mcm not more than 35 wt %.

EFFECT: invention allows to obtain pigments from specularite for protective-decorative and decorative coatings.

8 cl, 2 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: natural mechanically milled iron (III) oxide of lamellar structure at least 50 wt %, preferentially 75 wt %, contains particles sized 10 mcm and less in amount, at least, 50 wt %, preferentially 70 wt %, particularly preferentially 90 wt %. The ratio of thickness to maximum diametre of iron (III) oxide plates is 1:5, preferentially 1:10. To produce such iron (III) oxide, it is mechanically milled in an impactor or a jet-type mill. Iron (III) oxide resulted from mechanical milling, is separated by size grade, e.g. by an air separator. Iron (III) oxide can be used in lacquering for a base corrosion protection, mechanical load protection, UV and IR protection, for decorative coating, and also as an extender for polymeric and ceramic materials.

EFFECT: possibility to prepare highly dispersed lamellar particles of natural iron oxide.

15 cl

FIELD: chemistry.

SUBSTANCE: present invention pertains to production of black iron oxide pigments and can be used in paint and coating industry. The black iron oxide pigment is obtained from burning red mud - aluminous production waste. Before burning, the red mud is sorted according to size, with selection of the 0.02 mm fraction and further selection of the 0.02-0.045 mm fraction. These fractions are burnt in a controlled atmosphere with oxygen deficiency at 500-1000°C temperature.

EFFECT: obtaining iron oxide pigment of a pure black colour with 8-10 g/m2 coverage using aluminous production wastes - red mud, without more raw materials and additives and pollution of the environment.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used during exploration and exploitation of mineral deposits, particularly for purifying and improving the quality of underground water contaminated as a result of industrial activities, for consumption thereof. To realise the method, ion-exchange resins are pre-treated with active solutions prepared from distilled or spring water which has undergone freezing and thawing with removal of fractions rich in deuterium - a heavy hydrogen isotope, as well as electrodialytic treatment to form an anolyte and a catholyte. The obtained anolyte and catholyte are respectively post-fortified with hydrochloric acid and sodium hydroxide and used to regenerate cationite and anionite resins, followed by washing with distilled water. Formation of active clusters containing hydrated hydroxyl ions and hydroxonium ions in the ion exchange-treated water takes place via filtration thereof through a disintegrated mineral material consisting of a mixture of silicon and chalcedony.

EFFECT: method increases biological value of water and endows it with taste and biophysical properties typical of upland and spring water.

1 ex

FIELD: chemistry.

SUBSTANCE: invention can be used during exploration and exploitation of mineral deposits, particularly for purifying and improving the quality of underground water contaminated as a result of industrial activities, for consumption thereof. To realise the method, ion-exchange resins are pre-treated with active solutions prepared from distilled or spring water which has undergone freezing and thawing with removal of fractions rich in deuterium - a heavy hydrogen isotope, as well as electrodialytic treatment to form an anolyte and a catholyte. The obtained anolyte and catholyte are respectively post-fortified with hydrochloric acid and sodium hydroxide and used to regenerate cationite and anionite resins, followed by washing with distilled water. Formation of active clusters containing hydrated hydroxyl ions and hydroxonium ions in the ion exchange-treated water takes place via filtration thereof through a disintegrated mineral material consisting of a mixture of silicon and chalcedony.

EFFECT: method increases biological value of water and endows it with taste and biophysical properties typical of upland and spring water.

1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of treating water or a solution and can be used in agriculture and food industry, as well as in medicine and biotechnology. The method involves exposing water to physical fields. Water is treated with simultaneously with ultraviolet, infrared radiation and visible light with combined power of not less than 450 kcal/mol/s and modulated SHF and EHF radiation with superweak power of not more than 0.5 mW. Treatment is carried out in a flow reactor with an inlet pipe for inlet of the starting water and an outlet pipe for outlet of treated water. Inside the reactor there is an emitter of a source of combined ultraviolet, infrared radiation and visible light, an emitter of a source of SHF and EHF radiation and a cuvette for treated water. The cuvette is formed by end segmental plates which maintain the level of water by a height which is higher than the height of the treated water outlet pipe, and the corresponding lower part of the reactor.

EFFECT: high viscosity of the treated water, which characterises increase in internal energy of the water, which increases assimilability of the treated water or solution by proteins and carbohydrates.

2 cl, 1 dwg, 3 ex, 9 tbl

FIELD: process engineering.

SUBSTANCE: invention may be used in chemical, petrochemical and pulp-and-paper industries. Catalyst is fed into catalytic reactor from bin 13 by ejector 14 via loading branch pipe 7. Air is forced for layer fluidisation via branch pipe 3 under gas-distribution grating 8. Catalyst layer is heated to 300-400 °C. Then, coal is fed into layer via branch pipe 4. Layer temperature is increased to 500-750 °C by fuel combustion heat. Humid sediment is fed into layer via branch pipe 15. Solids of thermal oxidation are cooled down, separated from flue gases and treated by water solution of inorganic acid.

EFFECT: higher efficiency of treatment.

3 cl, 1 dwg, 14 ex

FIELD: chemistry.

SUBSTANCE: invention relates to applied electrochemistry and can be used to produce a liquid catholyte-antioxidant used in medicine, agriculture, sanitation, construction and metallurgy. The water to be treated is passed along the surface of a negatively charged high-voltage electrode while varying potential across the electrode until the catholyte reaches given optimum pH values ranging from 7 to 11, after which the obtained catholyte is discharged into a sealed vessel in which a vacuum of 5-10 torr is formed beforehand, wherein said sealed vessel is filled with the catholyte to a level in the range of 95-97% of its total inside volume. Further, after filling the sealed vessel with the catholyte, the catholyte is saturated with hydrogen by passing hydrogen through the volume of the catholyte and a hydrogen atmosphere at 900-1000 torr is formed in the sealed vessel over the catholyte.

EFFECT: invention simplifies the process of processing water into a catholyte; enables to obtain a catholyte-antioxidant with optimum combination of pH and redox potential, which improves quality and efficiency of the catholyte.

2 cl, 1 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: this invention relates to water filtration system elements. Filtration platform is mounted on water tap to comprise: Case makes hydraulic chamber with water inlet branch pipe, fast connection device to mount filtration system on water tap for communication between water inlet branch pipe and water tap. Note here that said device is arranged along said case nearby water inlet branch pipe. Filtration water circuit is arranged inside the case and hydraulically communicated with water inlet branch pipe. Unfiltered water circuit is arranged inside the case and hydraulically communicated with water inlet branch pipe. Discharge valve is arranged in hydraulic chamber to open and close circuits of filtered and unfiltered water. Actuator to open and close said circuits by discharge valve, and flow meter including flow meter cartridge secured on the case. Note here that said flow meter is arranged outside of the case and hydraulically communicated with filtered water circuit.

EFFECT: higher quality of water treatment.

FIELD: process engineering.

SUBSTANCE: invention relates to water treatment in circulation systems. Proposed device comprises case of hydrodynamic filter 1 with cleaned fluid discharge branch pipe 2 in its shell and that 9 of discharging fluid bearing treated at bottom 8, cover 3 with fluid feed branch pipe 4, filtration element 7 made from hydrophobic material to compose truncated cone with larger base 6 facing said branch pipe 4, dynamic settler 4 arranged housing bottom to include cylindrical nozzle 14 with branch pipes 15 and 17, and package of and taper funnels 12 arranged in nozzle 14 and provided with central perforated tube 11. Inner space of filtration element 7 secured by spring 5 has its top communicated with fluid feed branch pipe 4, and its bottom communicated with branch pipe 9. Aforesaid package of tapered funnels 12 is communicated via central tube with branch pipe 9.

EFFECT: higher efficiency of cleaning.

2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to polyamines and methods of using said polyamines for scale treatment in different industrial process streams. Disclosed are hydrophobically modified silicon-containing polyamines, containing repeating structural links of two types, a composition based thereon and a method of reducing or eliminating scales in an industrial process, involving addition of the disclosed polymer or composition into a process stream.

EFFECT: disclosed hydrophobically modified silicon-containing polyamines are suitable for aluminosilicate scale treatment in hard-to-clean industrial process streams, such as process streams in a Bayer method of extracting alumina from bauxite, streams of radioactive wastes and effluent streams formed during production of kraft paper.

30 cl, 9 tbl, 156 ex

FIELD: process engineering.

SUBSTANCE: invention may be used in sorption cleaning of effluents. In compliance with proposed method, effluents are processed by sorbent including minced wastes of aluminate hydrate concrete. Cleaning is performed by filtration through sorbent with layer thickness of 0.05-0.06.

EFFECT: higher efficiency, reduced consumption of sorbent, accelerated process.

2 tbl, 1 ex

FIELD: process engineering.

SUBSTANCE: invention may be used in sorption cleaning of effluents. In compliance with proposed method, effluents are processed by sorbent including minced wastes of aluminate hydrate concrete. Cleaning is performed by filtration through sorbent with layer thickness of 0.05-0.06.

EFFECT: higher efficiency, reduced consumption of sorbent, accelerated process.

2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention can be used during exploration and exploitation of mineral deposits, particularly for purifying and improving the quality of underground water contaminated as a result of industrial activities, for consumption thereof. To realise the method, ion-exchange resins are pre-treated with active solutions prepared from distilled or spring water which has undergone freezing and thawing with removal of fractions rich in deuterium - a heavy hydrogen isotope, as well as electrodialytic treatment to form an anolyte and a catholyte. The obtained anolyte and catholyte are respectively post-fortified with hydrochloric acid and sodium hydroxide and used to regenerate cationite and anionite resins, followed by washing with distilled water. Formation of active clusters containing hydrated hydroxyl ions and hydroxonium ions in the ion exchange-treated water takes place via filtration thereof through a disintegrated mineral material consisting of a mixture of silicon and chalcedony.

EFFECT: method increases biological value of water and endows it with taste and biophysical properties typical of upland and spring water.

1 ex

Up!