A method of obtaining a pigment ulesastumisega
(57) Abstract:The invention relates to the field of technology for inorganic pigments and can be used to obtain inorganic iron-containing modified pigment. The essence of the invention lies in the fact that the inorganic pigment iron modified by the preparation of a working solution of ferrous raw materials, dehydration, modification, drying and dispersion, at the same time as iron-containing raw materials use of iron concentrate produced in the steel mills during thermal processing of waste pickling acid and (or) means of hydrochloric acid solutions, which expose repulpable with water until the concentration of Fe concentrate 300-350 grams/cubic DM, oxidized salt of divalent iron to trivalent bertoletova salt in an acidic medium at a pH of 2.5 to 4 and neutralized with Belita powder technical to pH 5.5-6 and after filtering pasta modify resin melamineformaldehyde in the amount of 2-6% by weight of the pigment in terms of dry weight. The method can improve the dispersibility of the pigment, to reduce the specific consumption of Pigi technologies for inorganic pigments and can be used to obtain inorganic iron-containing modified pigment.Currently, the iron-containing pigments are obtained by grinding natural iron-containing raw materials: hematite iron ore, Zheleznyakov, swamp ore, bauxite and other Department of waste rock, wet or dry screening, washing and drying (E. F. white, I. C. Riskin, Chemistry and technology of pigments. "Chemistry", L. 1974, S. 407).The shortcomings in the industry. The process is characterized by multi-stage and is accompanied by the production of large quantities of wastewater in the amount of 40-50 m3to obtain 1 ton of pigment, and a low dispersion of the obtained pigment that leads to an increase in specific consumption of pigment and related materials. Possible additional mechanical grinding grains and aggregates of particles upon receipt of the inorganic pigment iron-modified requires high energy costs and is not economically justified.Known methods for producing iron-containing pigments (analogues): the dry process consisting of separation of waste rock, dispersion material, land and air separation. (E. F. Belenky and I. C. Riskin, Chemistry and technology of pigments, Chemistry, L. 1974 S. 407 and beyond); the wet method, comprising about who and grinding. (E. F. Belenky and I. C. Riskin, Chemistry and technology of pigments, Chemistry, L. 1974 S. 407 and forth, K. I. Tolstikhina, the Natural pigments of the Soviet Union, M. 1963, S. 287 and later).Disadvantages ways analogues and method used in the industry: low level of dispersion of pigment particles, because in natural iron-containing raw material contains a significant amount of aggregates of particles and coarse grains, not collapsing when existing methods of its processing, in turn, the destruction and dispersion of aggregates of particles and coarse grains of pigment requires high energy costs and low content of basic substance of Fe2O3in natural raw materials.As the prototype accepted way to obtain iron-containing pigment, including the preparation of a working solution of ferrous raw materials, its dehydration, drying and dispareunia (E. F. Belenky and I. C. resin, Chemistry and technology of pigments, "Chemistry", L. 1974 S. 422-426).The disadvantage of this method prototype: low rate of dispersion of pigment particles, because of natural raw materials has a significant amount of aggregates of particles and coarse grains, not collapsing when existing methods of its processing. As a result the by a multi-stage and is accompanied by the production of large quantities of wastewater in the amount of 40-50 m3to obtain 1 ton of pigment.Possible additional mechanical grinding grains and aggregates of particles upon receipt of the inorganic pigment iron-modified requires high energy costs and is not economically justified.The essence of the invention lies in the fact that in order to improve dispersibility of the pigment particles of inorganic iron-containing modified as iron-containing raw materials use of iron concentrate produced on the metal complexes in the process of thermal processing of spent sulfuric acid pickling and (or) means of hydrochloric acid solutions, which expose repulpable with water until the concentration of Fe concentrate 300-350 g/DM3, further oxidize the salt of divalent iron to trivalent bertoletova salt in an acidic medium at a pH of 2.5 to 4 and neutralized with Belita powder technical to pH 5.5-6, filter, modify to increase the specific surface of the melamine-formaldehyde resin powder in the amount of 2-6% by weight of pigment, calculated on dry basis and dried at a temperature of 110-140oC to a residual moisture content not more than 0.5%
During the existence of the x particles of iron ore concentrate to produce a fine product Televisao, brown or wine-colored depending on the mass fraction of iron in the original iron concentrate and oxidation of iron from the ferrous to the ferric state.Adding Belita powder technical, corresponding to THE 23.4.203-91 (instead of THE 14-11-181-89), the process proceeds neutralize the solution to pH 6-6,5 and the first modification of the pigment concentrate.Then hold the dehydration of the pulp by filtration to obtain paste and the subsequent modification of the surface of the pigment particles melamine-formaldehyde resin in the amount of 2-6% by weight of the pigment in terms of dry weight. The resulting paste (slurry) is dried at a temperature of 110-140oC.The greatest dispersion of the pigment concentrate is achieved after drying paste (slurry) at a temperature of 110-120oC to 0.3-0.5% of moisture.The inorganic pigment iron modified to classify fractions 1-3 μm and the residue on the sieve 0,063 not more than 3%
If the concentration of iron concentrate in the slurry is less than 300 g/DM3there is a slowing of the process of obtaining pigment and consumed excessive amounts of reagents, if more than 350 g/DM<2">If the oxidation of ferrous iron bertoletova salt is carried out at a pH of less than 2.5 or greater than 4, the pigment does not acquire the desired colorations.If the neutralization Belita powder technical conduct to pH less than 5.5, it decreases the degree of dispersion of the pigment, if more than 9, then the pigment loses its coloring and its consumption for dyeing products increases.The inorganic pigment iron modified, used to prepare paint materials in the production of plastic products, manufacture of rubber, in the manufacture of colored construction concretes and mortars and other industries.Industrial implementation of the method is conducted under conditions of TOAST "CELAC".As the iron-containing raw materials used iron concentrate produced in metallurgical production in the steel mills during thermal processing of waste pickling seriocity and (or) means of hydrochloric acid solutions.Iron concentrate produced in metallurgical production in the steel mills during thermal processing of waste pickling SalesOrderHeader concentrate 300-350 g/DM3, further oxidized in a solution of salts of divalent iron to trivalent bertoletova salt in an acidic medium at a pH of 2.5 to 4, and the slurry was neutralized with Belita powder technical to pH 5.5-6.The above operation is conducted in a mixer with a capacity of 3 m3with mechanical stirring for 30 min, and after filtering on the horizontal filter. The resulting slurry was modified to increase the specific surface area, resulting in increased coverage of the melamine-formaldehyde resin powder brand MS-R, corresponding to the requirements of THE 6-05.1867-79 in the amount of 2-6% by weight of the pigment in terms of dry weight. Then paste (slurry) was dried in a rotary tube furnace at a temperature of 110-140oC until the moisture content of 0.3-0.5%
The inorganic pigment iron modified classified to a fraction of -3 μm and remains on the sieve 0,063 mm, not more than 3%
The resulting pigment is inorganic iron-containing modified to be used for preparation of paints.The industrial implementation are given in the table.The prototype of the pigment contained 76,2-93,4% Fe2O3, 0,53-12,59% Al2O3, 1,8-21,5% SiO2, 0,67-3.3% of CaO, Of 0.11 To 1.4% MgO, 0-4,08% SO SUP>.The proposed method of producing inorganic pigment iron modified characterized by a high hiding power, metastatically and small amount of wastewater is equal to 3-4 m3per 1 ton of finished product. The method of obtaining iron-containing pigment, including repulpable iron-containing raw material in water, dehydration of the solid phase by filtration, drying and dispersion of the product, characterized in that as the iron-containing raw materials use of iron concentrate produced in the steel mills during thermal processing of waste pickling acid and/or hydrochloric acid solutions, repulpable lead to the concentration of iron concentrate 300 350 g/DM3with subsequent oxidation contained in concentrate salts of divalent iron to trivalent bertoletova salt in an acidic medium at pH of 2.5 to 4.0 and the neutralization Belita powder technical to pH 5.5 to 6.0, and after dehydration of the formed pasta modify resin melamineformaldehyde in number of 2 to 6% by weight of the pigment in terms of dry weight.
FIELD: chemical industry and agriculture; production of hydrosol of ferric iron hydroxide.
SUBSTANCE: the invention is intended for a chemical industry, an agriculture and pedology and may be used at production of solutions for soils reclamation. 0.5 l of a ferric chloride solution with concentration of 0.5 l/mole gram-molecule is poured into a pan. Carbon electrodes are put into the solution. Pass a current of 1А. Each 5-60 seconds polarity of the electrodes is changed. In a result of replacement of anions of the salt for ions of the hydroxyl obtain a stable hydrosol of the ferric iron hydroxide. The invention allows to produce such sols using a simple and a production-friendly method commercially.
EFFECT: the invention allows to produce such sols using a simple and a production-friendly method commercially.
SUBSTANCE: invention can be applied in paintwork and other industries. It claims multilayer magnetic pigment flakes and paint compositions containing thereof. Magnetic pigment flakes include central magnetic layer with first base surface, opposite second base surface, and at least one side surface; first insulation layer applied to the first base surface of magnetic layer; second insulation layer applied to the second base surface of magnetic layer; first reflector layer over the first insulation layer; and second reflector layer over the second insulation layer. Effective thickness of the insulation layers capable of preventing corrosion of a pigment flake. Magnetic pigment flakes can also include central magnetic layer; insulation layer practically surrounding the magnetic layer; and reflector layer practically surrounding the insulation layer.
EFFECT: prevention of pigment flake corrosion in aggressive environment and increased magnetic pigment colour saturation and brightness.
2 ex, 1 tbl, 5 dwg
SUBSTANCE: invention can be used to make an anticorrosion pigment which contains iron phosphate. The method of making the pigment involves addition of phosphoric acid to an iron salt solution, treatment of the mixture of solutions with ammonia, filtration, washing and drying. The iron alt used is FeSO4 and the mixture of solutions is treated with ammonia to pH=3.5-8.
EFFECT: invention enables to obtain an anticorrosion pigment with grey, blue and green colour, reduction of pigment opaqueness to 19-64 g/m2 and up to 25-69 g/100 g increase in oil consumption.
4 cl, 1 tbl, 6 ex
SUBSTANCE: invention can be used in paint-and-varnish industry. The method of producing a phosphate-containing pigment involves adding phosphoric acid to an iron (II) sulphate solution and treating the mixture with a product containing amine groups, filtration, washing and drying. The product which contains amine groups used is hexamethylene diamine and the mixture is treated with said product until achieving pH 5.5-8.
EFFECT: invention improves anticorrosion properties of the pigment.
1 tbl, 3 ex
SUBSTANCE: invention relates to a method of producing an anticorrosion pigment containing iron phosphate. The method involves adding phosphoric acid solution to iron (II) sulphate solution and neutralising the obtained solution with a product containing amine groups. Neutralisation is carried out until pH 5.5-8 is achieved and a precipitate is obtained. The precipitate is then filtered, washed and dried. The product containing amine groups used is polyethylene polyamine and the precipitate is dried at 50-65°C.
EFFECT: improved anticorrosion properties of the pigment and low production cost thereof.
1 tbl, 3 ex
SUBSTANCE: method of producing the pigment involves introduction of iron (II) phosphate solution and phosphoric acid into a suspension of red iron oxide pigment and treating the mixture with ammonia solution to pH 5.5-8, filtration, washing and drying.
EFFECT: invention increases opacity of the pigment.
SUBSTANCE: to produce magnesium sulphate and iron-oxide pigments from productions wastes, the fine-dispersed magnesium-containing raw material is reacted with the sulfuric acid spent etching solution containing iron sulfate. Dolomite dust formed upon calcination of dolomite at the temperature of 600-750°C is used as a magnesium-containing raw material. The ratio of sulfate-ions: dolomite dust in the etching solution is 1:1.1. Hydrothermal treatment of the produced suspension is carried out by blowing the solution with air, the oxygen of which oxidizes iron Fe+2 to Fe+3. The precipitate is separated on a filter press and washed from water-soluble compounds. Thermal treatment of the precipitate is carried out to the iron-oxide pigment. Drying and grinding of the iron-oxide pigment are carried out simultaneously in a combined spray dryer. The filtrate separated from the filter press and wash water containing magnesium sulfate are fed to the reactor. The content of sulfate ions is increased in the solution to 35-40% by the addition of concentrated sulfuric acid and neutralized with dolomite dust at the temperature of 80-100°C to pH equal to 7.0-7.5. Crystallization of magnesium sulphate is carried out in a crystalliser.
EFFECT: invention allows to increase the yield of magnesium sulphate and iron+oxide pigments, to reduce energy consumption during the treatment of the sulfuric acid spent etching solution.
2 cl, 1 dwg, 2 tbl, 3 ex
FIELD: varnish-and-paint industry.
SUBSTANCE: invention is intended for use in chemical industry and construction for preparing varnishes, paints, and rubber products. Gas treatment slime from converter industry is fractioned, fraction up to 10 mm is dehydrated by drying at 70-110°C to at most 5% moisture content and reduced to particles not exceeding 300 μm in size. Color spectrum of product is extended from red to black by calcining disintegrated product at 300 to 900°C. Content of iron oxides in pigment is much higher than in pigments prepared using known processes.
EFFECT: widened resource of raw materials, utilized converter industry waste, and reduced price of product.
2 cl, 1 tbl, 6 ex
FIELD: metallurgy; building industry; varnish and paint industry.
SUBSTANCE: the invention is pertaining to the field of metallurgy, building industry, varnish and paint industry, in particular, to the method of production of a red ferrioxide pigment. A ball mill is charged with industrial water, loaded with iron oxide with concentration of 500-900 g/dm3, poured with a neutralizing agent in the amount ensuring pH 6 ÷ 10. The iron oxide is formed at a thermal decomposition of the hydrochloride solutions used at etching treatment of carbon steels. As a neutralizing agent it is possible to use caustic soda, a slaked lime, microcalcite. The suspension is pulped for 3-5 hours, put in a reactor with a stirrer, where it is washed out with formation of a suspension, filtered off and dried. The target product has the following parameters: pH 5 ÷ 8; the share of water-soluble salts - 0.02-0.03 %; dispersing ability - 27-30 microns; hiding power - 6 ÷7 g/m2. The invention allows to simplify process and to upgrade parameters of the pigment.
EFFECT: the invention allows to simplify process and to upgrade parameters of the pigment.
2 cl, 1 tbl, 1 ex
FIELD: paint-and-varnish industry; construction engineering; painting plastics and leather; production of enamel paints, primers, putties, wall-paper and veneer.
SUBSTANCE: solution of hydraulic washing-out of used melt of titanium chlorates containing ferrous chloride (II) is treated with alkaline reagent to pH= 2.5-4.5 at precipitation of oxyhydrates of metals. Solution is separated from sediment by filtration. Cleaned solution thus obtained is mixed with solution obtained after leaching-out of copper-containing melt of process of cleaning titanium tetrachloride from vanadium compounds by means of copper powder. Ratio of volumes of said solutions is 1 : (0.5-2), respectively. Mixed solution is treated with alkaline reagent to pH= 9-11. Suspension thus obtained is subjected to filtering. Sediment is washed, dried and calcined additionally at temperature of 400-700°C. Proposed method makes it possible to utilize wastes of process of production of titanium dioxide from titanium tetrachloride. Pigment thus obtained has rich black color, reflection coefficient of 3.5±0.5%, hiding power of 4.5±0.5 g/m2 and pH of aqueous suspension of 7.0±0.5.
EFFECT: enhanced efficiency.
2 cl, 1 ex
FIELD: pigment technologies.
SUBSTANCE: invention is intended for use in varnish-and-paint industry and in rubber and plastics production. Red iron oxide pigment preparation comprises: oxidation of aqueous solutions of ferric sulfate or suspensions of ferric hydroxide with air oxygen at quasi stationary temperature and pH values of reaction medium; hydrothermal heat treatment of suspension of ferric oxyhydroxides in periodical or continuous regimes in autoclaves; washing-out of pigment from water-soluble salts; drying and grinding of the pigment. During hydrothermal heat treatment FeOOH suspension is affected by nanosecond electromagnetic pulses having following characteristics: pulse duration 0.5-5 ns, pulse amplitude 4-10 kv, pulse repetition frequency 200-1000 Hz. Process is carried out at 130-200°С.
EFFECT: lowered FeOOH suspension hydrothermal heat treatment temperature and increased pigment preparation productivity.
1 tbl, 12 ex