Preventing of starch degradation in production of cellulose, paper or cardboard

FIELD: technological processes.

SUBSTANCE: invention relates to process waters treatment. Method of starch degradation degree controlling in starch containing process water from cellulose production provides for process water treatment with biocidal system containing zinc ions and oxidizing or non-oxidizing biocide.

EFFECT: disclosed method provides effective reduction or prevention of starch degradation with high quality of production.

13 cl, 4 dwg, 4 tbl, 4 ex

 



 

Same patents:
Electrical paper // 2531295

FIELD: textiles, paper.

SUBSTANCE: invention relates to the field of production of electrically insulating paper materials obtained from sulphate unbleached cellulose and designed to isolate the electrical power cables for voltage up to 35 kV inclusive, for insulation of telephone cables and winding wires, for the manufacture of different electrically insulating products. In order to improve stretchability and dynamic strength (energy of rupture) in the machine direction, as well as dielectric properties and processability the electrical paper has a deformed surface structure in the form of low-observable micro-folds obtained as a result of operation of micro-creping, elongation in the machine direction (5-15%) and the specific electrical conductivity of aqueous extract with the irrigation modulus of 1:50 in the range of (35-110) mcS/cm.

EFFECT: invention enables to obtain the high-quality and high-reliability power cable with impregnated paper insulation.

8 cl, 1 tbl

FIELD: textiles, paper.

SUBSTANCE: paper pulp contains sulphate softwood pulp or its mixture with bleached sulphate hardwood pulp, adhesive based on alkyl ketene dimers, polyaminepolyamideepichlorohydrin resin, and cationic starch. Also the aqueous solution of hydrolysed starch, styrene copolymer and imide of maleinic acid and acetic acid is added to it.

EFFECT: increased paper strength in wet condition, cohesion of the material, and tear resistance and picking resistance, improvement of the porous structure of paper and its printing properties.

1 tbl

FIELD: textile, paper.

SUBSTANCE: method includes dissolution of cellulose and its grinding down to specified extent of grinding. Preparation of the first dispersion with application of return water, containing fibres of microcrystal cellulose, produced by its grinding in mixture with titanium dioxide and calcium hydroxide in specified amount. The second dispersion is prepared from cellulose fibres with application of return water. Then the first suspension is mixed with the second, and produced mixture is treated with carbon dioxide. In case of this treatment calcium hydroxide under action of carbon dioxide results in production of chemically deposited chalk and production of paper mass at specified ratio of components. Grinding of microcrystalline cellulose in mixture with titanium dioxide and calcium hydroxide is carried out in vibration mill with provision of impact and wear effect at mixture.

EFFECT: increased extent of fillers retention in paper, improvement of its printing properties, provision of possibility to vary bulk and porosity of paper, provision of possibility to use fully closed cycle of return water.

1 tbl, 8 ex

FIELD: chemical industry; printing industry; powder metallurgy industry; cosmetic industry; other industries; production and application of the highly anticorrosive metallic pigments.

SUBSTANCE: the invention is pertaining to production of the of the highly anticorrosive metallic pigments similar to laminas, which may be used in production of the printing ink, plastic materials, cosmetics, the powder coatings and in other branches of industry. The pigments have on their surfaces: the metallic substrates similar to the laminas and treated with the compounds of the phosphoric acid and-or the compounds of the boric acid; one or more layers of the coatings consisting of one or more hydrated oxides of the metals of one or more metals selected from the group, which includes silicon, aluminum, zirconium, titanium and tin. On the basis of the highly corrosive metallic pigments similar to laminas it is possible to produce the interferential colored pigments. The invention allows to increase the anticorrosive resistance of the metallic pigments at the expense of saving without the faults of the initial surface smoothness of the similar to the laminas metallic substrates, to increase the homogeneity and density of the layers of the hydrated oxides of the metals.

EFFECT: the invention ensures the increased anticorrosive resistance of the metallic pigments, saving the initial surface smoothness of the similar to the laminas metallic substrates, the increased homogeneity and density of the layers of the hydrated metals oxides.

40 cl, 9 ex, 4 tbl, 8 dwg

FIELD: chemistry.

SUBSTANCE: claimed is method and deammonifying installation for purification of ammonium-containing sewage waters. Deammonifying installation for purification of ammonium-containing sewage waters contains aeration tank and hydrocyclone for separation of sludge from aeration tank into relatively heavy fraction, which includes bacteria, performing anaerobic ammonium oxidation, and relatively light fraction. Hydrocyclone contain input, connected with aeration tank, for return of separated relatively heavy fraction into aeration tank and upper output, connected with aeration tank, for discharge of separated relatively light fraction from hydrocyclone. Hydrocyclone contains cylindrical segment and conic segment. Surface of internal walls of conic segment is rough on certain parts. Rough surface of internal walls of conic segment has higher degree of roughness than surface of internal walls of cylindrical segment. Method of purification of ammonium-containing sewage waters is realised in deammonifying installation.

EFFECT: simplification of ammonium and nitrite conversion into elementary nitrogen.

33 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to ecology and environmental protection. For cleaning filtering system is erected and used on soil slope surfaces. Filtering system is composed of the slope soil top layer processed with aqueous solution of polyelectrolyte complex. The latter comprises the mix of hydrolysed polyarcylonitrile and polyethylene polyamine at the ratio of 1:3.5-1:4.5, wt %. Processed soil sorption capacity saturated, said soil is removed and disposed or recovered.

EFFECT: simplified cleaning, higher erosion resistance of run-off surfaces.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry. Mixed coagulant from mineral raw material is obtained by dissolution of boehmite-kaolinite bauxide in autoclave with hydrochloric acid with concentration 220 g/l with ratio S:L=1:6 for 1-3 hours in interval of temperatures 150-180°C.

EFFECT: invention makes it possible to increase coagulation ability of mixed coagulant - hydrooxichloride of aluminium and iron with concentration by Al2O3 2,32-6,87 and by Fe2O3 0,94-1,02 wt %, in water purification: by turbidity and colour.

2 dwg, 6 tbl

Vacuum deaerator // 2558109

FIELD: power industry.

SUBSTANCE: vacuum deaerator contains a branch pipe for supply of chemically purified deaerated water to the distributing header, the first jet plate fitted with a finned overflow edge and a punched steam discharge sheet, the second jet plate having a finned overflow edge and a punched steam discharge sheet. Fins of overflow edges of the first and second jet plates are made rectangular at an angle 30-60° to vertical line with inclination towards drain from overflow edges of flows of the deaerated water, the cross-flow plate with cross-flow and overflow edges, three punched pipelines for supply of heating water to the cross-flow plate, the bubbling sheet with overflow edge, the punched pipeline for supply of heating water under the bubbling sheet, at least, two pipelines for discharge of non-evaporated heating water to the inlet of the bubbling sheet, the partition blocking discharge of non-evaporated heating water into the flow of deaerated water drained from the bubbling sheet, passing through the bubbling sheet at least two L-shaped boxes of heating vapour cross-flow, installed evenly along the deaerator housing in the space between the overflow edge of the bubbling sheet and the punched pipeline for supply of heating water under the bubbling sheet, at least one branch pipe for discharge of vented steam and one branch pipe for discharge of deaerated water.

EFFECT: increase of overall performance of the vacuum deaerator.

3 dwg

FIELD: testing equipment.

SUBSTANCE: invention relates to technology of pressure test of electro-hydraulic-mechanical systems and can be used for degassing the working fluid in technical devices using in their constructive solutions the flowing hydraulic tanks of open type. The method comprises degassing the working fluid on the grid in the flowing hydraulic tanks, imparting the grid of low-frequency transverse vibration, and at the inlet of the grid by bubbling the gas liquid layer is created with a high-frequency pulsating low-intensity pressure. The flowing hydraulic tank of open type (1) comprises a lid (2), partitions (3, 4), a grid (5), the pipes of discharge (6) and intake (15) of the working fluid, a drain (7), intermediate (18), intake (14) cavities and involves the installation of a grid (5) on the elastic supports (8). Below the grid (5) on the side of the flow outlet into the cavity (18) a pneumatic dynamic vibrator (9) is mounted with the modulated phase of gas oscillation, the outlet nozzle (10) of which is mounted on the grid (5).

EFFECT: invention provides increased efficiency of degassing fluid, the degassing process intensification, which enables to improve and expand the indices of quality of electro-hydraulic-mechanical systems and their components.

2 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer obtained via condensation polymerisation. The polymer is obtained from at least two monomers: acrylic monomer and alkylamine. Said polymer is modified such that it contains a dithiocarbamate salt group capable of cleaning one or more compositions containing one or more metals. The polymer has molecular weight of 500-200000.

EFFECT: obtaining polymers for various media as means of purification from metals, including waste water systems.

13 cl, 5 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: inventions relate to production of desalinated water and can be used for obtaining drinking water from sea and salt waters. Extraction of water from saline solution is carried out with application of selective solvent, containing carboxylic acid, which has carbon chain from 6 to 13 carbon atoms long. In order to realise the method saline solution emulsion in selective solvent is prepared, selective solvent is heated before and after contact with saline solution to obtain first phase, which includes selective solvent and water from saline solution, dissolved in selective solvent, and second phase, including highly-concentrated remaining part of saline solution. After that, first phase is separated from second phase, first phase, including selective solvent and dissolved water, is extracted from highly-concentrated remaining part of saline solution or highly-concentrated remaining part is extracted from saline solution from first phase. First phase is cooled after extraction to precipitate water from selective solvent and precipitated water is removed from selective solvent.

EFFECT: invention provides obtaining almost pure fresh water.

19 cl, 15 dwg, 2 ex

FIELD: process engineering.

SUBSTANCE: invention can be used for desalting of sea, hard and/or contaminated water by direct osmosis desalting. To this end, contaminated feed solution with water at first osmosis pressure is forced through semi-permeable diaphragm to discharge side that has the flow of carrier solution with second osmosis pressure on discharge side of semi-permeable diaphragm. Diluted discharge solution is heated to agglomerate discharged diluted substance to two-phase flow containing liquid phase of agglomerated dissolved substance and liquid water phase. Then, agglomerated dissolved substance is separated to get enriched flow to be cooled to obtain cooled single-phase water-rich flow to be subjected to removal of residual dissolved substance to produce purified water.

EFFECT: higher quality and desalting and purification.

23 cl, 4 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: method of purification of phenol-containing sewage waters of alkali-hydrolysis processing of rice husk includes preliminary desiliconisation of phenol-containing sewage waters by their processing with hydrochloric acid with precipitation of solid and separation from solution of silicon-containing product and electrochemical oxidation in presence of chloride ions in electrolytic cell with application of direct current. Process of electrochemical oxidation is carried out with concentration of chloride ions 0.10-0.11 mol/l in non-diaphragm electrolytic cell with application of ruthenium-titanium oxide anode and titanium cathode for 70-90 min with current density 100-150 mA/cm2 with constant mixing. Required concentration of chloride ions is provided by dilution with water of phenol-containing sewage waters after their desiliconisation.

EFFECT: invention makes it possible to increase degree of purification of polydisperse concentrated phenol-containing sewage waters of alkali-hydrolysis processing of rice husk from phenol and other organic pollutants.

3 cl, 1 tbl, 2 ex

FIELD: agriculture.

SUBSTANCE: device comprises a flotation device, a frame, a hydraulic drive. On the frame the longitudinal rods are pivotally mounted, and on their cantilever portion the linkage for attachment of the drum is mounted with the ability of movement in a vertical plane. The drum is mounted with the ability of replacement of the drum holder, at that the drum is rotated by the hydraulic motor through the belt drive in the direction opposite of the flotation device movement.

EFFECT: improvement of quality of the implementation of the technological process of cleaning the water reservoirs from blue-green algae and reduction of energy intensity.

2 dwg

FIELD: chemistry.

SUBSTANCE: invention refers to agriculture. A formulation for crop growth stimulation and development contains copper compounds, citric acid, alkanolamine, water, manganese compounds in a molar ratio in the mixture: copper compounds (calculated as copper):manganese compounds (calculated as manganese):citric acid:alkanolamine equal to 1:(2-8):(2-10):(4-80) in the following proportions, wt %: the mixture of copper compounds, manganese compounds, citric acid and alkanolamine in a molar ratio specified above 0.5-70, water the rest.

EFFECT: invention provides high crop yield.

3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: antimicrobial-protected material and use of said material. The material consists of a matrix containing inorganic phosphates of at least two different metal cations, copper (Cu) and zinc (Zn), in finely dispersed, dispersed or dissolved form. The metal phosphates are selected from basic copper phosphate Cu2(OH)PO4, copper (II) phosphate Cu3(PO4)2, copper (II) pyrophosphate Cu3P2O7, zinc dihydrophosphate Zn(H2PO4)2, zinc orthophosphate Zn3(PO4)2 and zinc pyrophosphate Zn2P2O7. The material forming the matrix is selected from organic polymer materials selected from polyvinyl butyral, polypropylene, polyethylene, polyamide, polybutylene terephthalate, polyethylene terephthalate, polyester, polyphenylene oxide, polyacetal, polymethacrylate, polyoxymethylene, polyvinyl acetal, polystyrene, a copolymer of acrylonitrile, butadiene and styrene, a copolymer of acrylonitrile, styrene and acrylate, polycarbonate, polyether sulphone, polyether ketone, polyvinyl chloride, thermoplastic polyurethane and/or copolymers thereof and/or mixtures thereof.

EFFECT: high antimicrobial activity while reducing the harmfulness of the antimicrobial agent.

7 cl

FIELD: chemistry.

SUBSTANCE: invention relates to complex water treatment with a sodium persulphate oxidising agent and heavy metal ions, particularly silver, copper and zinc, and can be used to disinfect recycled pool water and post-treatment of industrial waste water. The water disinfection method includes treating said water with an oxidising agent and copper and silver ions obtained by dissolving salts thereof, after which the water is held for 0.5-2 hours. Zinc ions are optionally used. The oxidising agent used is 0.2-0.4% aqueous sodium persulphate solution, which is added to the water simultaneously with copper, silver and zinc salt solutions until achieving the following concentrations thereof in the water: sodium persulphate 1-5 mg/l; silver ions 0.02-0.05 mg/l; copper ions 0.07-1.0 mg/l; zinc ions 3.0-5.0 mg/l. Water treatment is carried out at 10-25°C.

EFFECT: invention provides water disinfection and prevents repeated bacterial infection of the water for a long period of time.

1 tbl, 3 ex

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to biocidal elements. A structural element with an antimicrobial surface (12). The given surface (12) comprises metal surface areas (14) and adjoining surface areas (13) from MnO2, with the metal surface areas (14) consisting of Ag and/or Ni and manganese oxide is at least partially found in γ-modification of MnO2.

EFFECT: invention enables a higher antimicrobial action.

12 cl, 5 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. Concentrated liquid mineral composition, containing the following components is applied for spraying leaves: total ammonia nitrogen (%) 0.08-2%, potassium, expressed as K2O (%) 3-6%, magnesium, expressed as MgO (%) 0.4-0.8%, sodium, expressed as Na2O (%) 1-2%, calcium, expressed as CaO (%) 0-0.5%, total phosphates, expressed as SO3 (%) 3-6%, total phosphorus, expressed as P2O5 (%) 0%, chlorides Cl (%) 1-2%, bicarbonates (in % HCO3) 1.2-3.0%, boron (%) 0.1-0.2%, copper (%) 0.018-0.03%, manganese (%) 0.00005-0.006%, iodine (%) 0.02-0.04%, zinc (%) 0.00005-0.006%, iron 0.0002-0.003, water to 100%. Percent content is expressed in weight percent relative to the total composition weight.

EFFECT: invention makes it possible to improve adaptive response of plants to change of the environmental conditions.

9 cl, 5 dwg, 1 tbl, 6 ex

FIELD: agriculture.

SUBSTANCE: synergistic antimicrobial composition comprises a zinc salt of glyphosate and zinc pyrithione. Also, the method of growth inhibition of or control of growth of microorganisms in the building material by adding the said synergistic antimicrobial composition, a coating composition comprising the said composition, and a dry film obtained from the said composition.

EFFECT: invention provides growth inhibition or control of growth of microorganisms.

6 cl, 5 tbl

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