1718 results about "Sodium sulfites" patented technology

The invention discloses acrylamide modified polymer micro-crosslinking gel and a preparation method thereof. The preparation method is characterized in that the method comprises the following steps that: acrylamide modified polymer PAE containing functional macro monomer is prepared into an aqueous solution with the concentration between 0.1 and 4g/L, the concentration of crosslinking agent between 0.01 and 1.0g/L, the concentration of surface active agent between 0.01 and 8mmol/L and the concentration of heat stabilizer sodium sulfite between 0.005 and 1.0g/L; the aqueous solution is added in a mixing container with a stirring device and is stirred evenly at room temperature; the pH value of the solution is adjusted between 4 and 11 to prepare a polymer solution system of the acrylamide modified polymer micro-crosslinking gel used for tertiary oil recovery and displacement, oil displacement modification, profile modification or water plugging; and the polymer solution system undergoes micro crosslinking during flowing inside an oil layer to form the gel. The acrylamide modified polymer micro-crosslinking gel has ideal elasticity, difficult dehydration, stable performance and excellent performances on tackifying, temperature resistance, salt resistance, shearing resistance and ageing resistance.

The invention belongs to the gas separation technology area, it relates to a decarbonization solution which recycles or removes the carbon dioxide gas from the mixed gas which contains carbon dioxide, said invention specially relates to an ethoxyl ethylenediamine decarbonization solution. Its characteristic lies in: the invention has designed a new compound decarbonization solution which is composed of the main absorption component, the aid absorption component, the activation component, the corrosion inhibitor, the oxidation inhibitor and the water. Among, the main absorption component is AEE, the aid absorption component is AMP, MDEA and TEA, the activation component is MEA, DEA and PZ, the corrosion inhibitor is vitriol sour sodium, the oxidation inhibitor is the sodium sulfite and the cupric acetate. The effect and the profit of the invention are that it can be used in recycling many kinds of chemical industry reaction exhaust, the carbon dioxide of the combustion flue gas and the mixed gas, may also used in removing the carbon dioxide of town gas, the natural gas and so on, the merit of the decarbonization fluid is that the absorption capacity is big, purification is high, desorption rate is big, regeneration energy consumption is low.

The invention discloses a technology of enhanced-dispersion partial selective and bulk flotation of lead and zinc sulfide ores under low and high alkalinity. During grading of the lead and zinc sulfide ores, sodium hexametahposphate is taken as a dispersion agent and directly added into a ball mill, the ores are ground till the ores with the size of 0.074mm account for 67%-70%, lime is taken as an adjusting agent, zinc sulfate and sodium sulfite are taken as inhibitors, dithiophosphate BA and diethyldithiocarbamate are taken as collectors, and selective flotation of part of lead minerals with good floatability can be performed under low alkalinity; then xanthate and the diethyldithiocarbamate are taken as collectors, and the flotation of the lead minerals is further performed under high alkalinity; copper sulfate is added in lead flotation tailings for activation, butyl xanthate is further taken as the collector for flotation of zinc blende and part of pyrite, and zinc-sulfur separation flotation is further performed on zinc-sulfur mixed concentrate; and sulfuric acid is added in zinc flotation tailings for activation, and the xanthate is taken as the collector for flotation of the remaining pyrite. By adopting the technology, the lead-silver recovery rate can be improved, the using amount of lime and sulfuric acid can be reduced, the circulating amount of middlings can be reduced, the ore dressing cost can be reduced and the grade of the concentrate can be improved.

The invention discloses a method for floating high-sulfur gold-bearing copper ore, which aims at solving the problems that the existing beneficiation method is lower in copper and gold recovery rate under high-alkali condition, and problems that xanthate and black powder are adopted as high-sulfur gold-bearing copper ore collecting agents, the collecting power is stronger, the selectivity is poor, the separation difficulty of copper and sulfur can be aggravated and the consumption of inhibitors is increased. The method comprises the steps of by adopting lime and sodium metabisulfite as an ore pulp pH regulator and a pyrite inhibitor, and the mixture of isopropyl xanthogen propionitrile ester, black powder acid and ethyl dithiocarboxyl propionitrile ester according to certain proportion as a collecting foaming agent, carrying out ore grinding, rough concentration, primary scavenging, secondary scavenging, primary concentration, and secondary concentration on a crude ore, thus realizing the high-efficiency recovery on copper and gold in the high-sulfur gold-bearing copper ore. According to the method, through reasonable combination and addition of medicaments, the selective adsorption of the collecting agent on target mineral-copper pyrite and other copper sulfide minerals and gold minerals can be reinforced, and the copper recovery rate and the gold recovery rate can be improved.

The invention relates to a method for extracting selenium from selenium-deposited residue. The method comprises the following steps of: dissolving selenium-deposited residue to an alkaline sodium sulfite solution, generating water-soluble seleno sodium sulfate through a reaction between elemental selenium and the sodium sulfite solution; fully reacting the seleno sodium sulfate under the acidification of sulfuric acid to obtain a selenium elemental precipitate; and washing and drying to obtain coarse selenium with the purity of about 90 percent. The invention realizes separation of copper, silver and selenium in the selenium residue, and the separated selenium can be directly refined due to higher purity, therefore, the process flow of selenium recovery is shortened, the recovery rate is increased, and the production cost is decreased; the trouble of high copper content of an anode plate in silver electrolysis in the gold and silver refining process is solved and the pass rate of primary silver powder electrolysis is increased. The invention can be applied to recovering and extracting selenium from materials, such as selenium-contained residue generated in the technical process by using a wet method for treatment or selenium-contained acid mud generated in the production process of the copper anode slime by using a pyrogenic method for treatment and can also be applied to the production of high-purity selenium products by directly purifying a coarse selenium raw material.

The invention relates to a controllable expanded plugging agent used for drilling plugging operation of an oil and gas field. The controllable expanded plugging agent has the characteristics of expansion controllability, deformability, adaptivity and the like. A technical scheme of the invention is that the ingredients and contents of raw materials used for preparing the plugging agent are as follow: 120 g of water, 7-12 g of acrylic acid, 18-23 g of acrylic amine, 3-6 g of ultrathin CaCO3 (Calcium Carbonate), 12-20 g of neutralizer, 0.05-1 g of crosslinking agent, 0.4-0.8 g of initiators, 3-7 g of emulsifier and 35-45 g of paraffin wax; a preparation method of the plugging agent comprises the steps of putting 120 g of water into a reaction tank; adding the acrylic acid and the acrylic amine at the same time of stirring; dropping the neutralizer NaOH (Sodium Hydroxide) after the solution is dissolved and regulating the pH value of the solution to be 9-11; then adding the ultrathin CaCO3, the crosslinking agent NMBH (Novel Microemulation-based Hydrogel) and initiators Na2SO3 (Sodium Sulfite) and (NH4)S2O8 (Ammonium Persulfate); stirring to react for 50-150 minutes at 40-60 DEG C soas to obtain a sample; heating the paraffin wax to a liquid state; adding the sample into the paraffin wax; adding Span 80; and uniformly stirring, drying and grinding to obtain the product. The product of the invention, which is a multifunctional plugging agent with a controllable expansion speed, is used for the drilling plugging operation of the oil and gas field.

The invention relates to a preparation method of an aliphatic high range water reducer applying industry byproduct and the application thereof, which belongs to the field of concrete water reducer. The invention uses the industry byproduct in production of sulfonation-process phenol or the byproduct (Na2SO3 content is 60-85percent) in production of p-cresol and sodium hydrosulfite to produce the aliphatic high range water reducer and takes acetone, formaldehyde, industry byproduct, sulphite or sodium pyrosulfite as raw materials and then sulfonation and condensation reactions are carried out in aqueous medium, the reactant weight ratio is acetone: formaldehyde: sulphite plus industry byproduct: water is equal to 1:2.5-4.5:1.5-2.6:4.0-6.0, the mass concentration of the condensation compound obtained is 30-42 percent, and the viscosity thereof is 20-100m.Pa.S. The product performance of the invention is similar to the common product, but the cost is reduced by 10-20 percent. The invention has environmental protection and waste utilization, can be applied to preparation of various concrete members and production of ready mixed concrete and has good industrialization prospect.

The invention discloses a soda wet desulphurization process and a soda wet desulphurization system for sintering flue gas, and solves the problems of severe pollution and the like in the prior art. Sodium carbonate serves as a desulfurizing agent, and a desulfurization by-product is sodium sulfite; and the process comprises the following steps of: (1) cooling and introducing sulfur-containing flue gas into a desulfurizing tower; and (2) purifying the sulfur-containing flue gas in the step (1) in the desulfurizing tower by taking solution of sodium carbonate or sodium hydroxide as an absorbent, demisting the purified flue gas through a demister and discharging. The process is simple in procedures, high in desulphurization efficiency, high in response speed and high in value of the desulfurization by-product, and saves energy and land.

The invention relates to the technical field of sewage treatment and particularly relates to an industrial wastewater treating agent. The industrial wastewater treating agent comprises the following components in parts by mass: 0.8-3 parts of polyacrylamide, 25-35 parts of aluminium polychlorid, 25-55 parts of alums, 3-8 parts of iron trichloride, 0.8-3.4 parts of polymeric ferric sulfate, 1.2-2.5 parts of a coagulant aid, 2-10 parts of plant fiber, 10-30 parts of coal ash, 0.8-2.5 parts of sodium silicate, 2.5-5 parts of sodium sulfite, 0.5-3.5 parts of sodium hypochlorite, 5-10 parts of hydrogen peroxide, 8-15 parts of a sodium carbonate-sodium bicarbonate buffer system and 10-20 parts of sodium-based bentonite. The treating agent has the beneficial effects of wide treated pollutant range, good effect, wide production raw material source, environmental friendliness, no toxicity, good discharged water quality, short process flow, and high process operating safety. The treating agent disclosed by the invention can treat various kinds of wastewater such as chemical wastewater produced in oil fields, mining, steel, electroplating wastewater, dyes, pesticides, wine-making and chemical engineering, and sanitary sewage, papermaking wastewater, river and lake water, rubbish seeping water, leather-making wastewater, and the like; and the treating agent is good in treatment effect.

The invention discloses a copper and lead separating cyanide-chrome-free beneficiation method for low-grade multi-metal sulfide ore. The beneficiation method is performed according to the following steps that (1) raw ore after ore grinding and grading enters the step of copper and lead bulk flotation to obtain copper and lead bulk concentrate and bulk flotation tailings, beneficiation reagents including 25# black powder and tetrabutyl ammonium black powder are adopted as collecting agents for copper and lead ore, and sodium sulfite and zinc sulfate are adopted as inhibitors of zinc ore; (2) copper and lead separating flotation is performed on the copper and lead bulk concentrate to obtain qualified copper concentrate and lead concentrate, in the copper and lead separating flotation process, activated carbon is adopted for reagent removal, and an inhibitor combined by sodium sulfite, sodium carboxymethyl cellulose and sodium humate serves as the inhibitor of lead sulfide ore. The beneficiation method has the following advantages of being low in price and production and application cost, it is unnecessary to perform special treatment on ore pulp, the process is easy to control, and technological and economic indexes are stable. The great defect that a dichromate titration method, a cyanide method and a less-cyanide-chrome technology can cause pollution to the environment is overcome, and the usage amount of beneficiation new water is greatly reduced.

The invention relates to an anti-sloughing diluted filtration reducing agent for drilling fluid and a preparation method thereof. The filtration reducing agent is prepared from the following raw materials by weight portion: 80 to 120 portions of substance containing humic acid, 30 to 80 portions of sodium metabisulfite, 300 to 500 portions of water, 10 to 30 portions of ammonium hydrolyzed polyacrylonitrile, 2 to 15 portions of cross linking agent, 30 to 50 portions of potassium hydroxide, 5 to 20 portions of complexing agent, 1 to 10 portions of urea and 10 to 20 portions of organic silicone resin. The preparation method comprises the following steps: weighting the water, the potassium hydroxide, lignite or peat or weathered coal and the sodium metabisulfite by weight portion, adding the materials into a stirred autoclave, sealing the stirred autoclave, raising the temperature, performing reaction and reducing the temperature; adding the ammonium hydrolyzed polyacrylonitrile, the cross linking agent, the complexing agent, the urea and the organic silicone resin by weight portion into the stirred autoclave after the temperature reduction, sealing the stirred autoclave, raising the temperature and stirring for reaction; and discharging, and performing spray drying on a product to obtain a finished product. The anti-sloughing diluted filtration reducing agent has good comprehensive performance, can prevent slough of mineshafts and reduce the filtration loss and viscosity of slurry, and is easy to realize safe production.

The invention provides an inhibitor for pyrrhotite flotation. The inhibitor comprises sodium carbonate, sodium pyrosulfite and triethylene tetramine, pyrrhotite in pulp can be effectively and selectively inhibited, meanwhile basically no affect is brought to the flotation of pentlandite and copper pyrite, and the inhibitor is particularly suitable for the flotation and separation of minerals difficult to select such as high content of pyrrhotite and low quality of cooper-nickel; and the invention further provides a preparation method and an application method of the inhibitor for pyrrhotite flotation, the operations are extremely simple and convenient, and excellent industrial prospect is provided.

The invention discloses a flotation separation method for chalcopyrite, galena, zinc blende and ironpyrite by a composite inhibitor which comprises sodium pyrosulfite, sodium sulfite and ferrous sulfate, has an inhibition effect on the galena, the zinc blende and the ironpyrite under the condition of a natural pH value, and is easy to degrade and activate after inhibition during a separation process of the chalcopyrite, the galena, the zinc blende and the ironpyrite. According to the flotation separation method, the flotation is performed under the condition of a neutral medium, the adopted composite inhibitor has the inhibition effect on three metal sulphide ores of the galena, the zinc blende and the ironpyrite; environment pollution caused by adoption of heavy metal salt inhibitors is prevented; pipeline scaling caused by adoption of lime is prevented; and the inhibiting capacity of the composite medicament is relatively weaker and added segmentally, an activation difficulty of follow-up operation due to overinhibition in a flotation process is prevented, and the improvement of the metal recovery rate is further facilitated.

The invention discloses a production technology of fructus phyllanthi wine. The production technology comprises the following steps of: preprocessing an olive raw material to obtain the olive pulp; crushing the olive pulp, and filtering to obtain olive juice; adding sodium hydroxide and sodium sulfite to remove bitter taste; adding water and white granulated sugar; and performing twice fermentation and ageing and the steps of cold treatment, heat treatment and the like to obtain olive fruit wine which can effectively maintain the specific taste and aroma of olive and is rich in multiple aminoacids and trace elements necessary to a human body. The production technology disclosed by the invention can be used for shortening the production period, and is simple and easy to implement and low in production cost.

A treatment method for wastewater after vanadium precipitation comprises: detecting the concentrations of chromium (VI) and vanadium (V) in the wastewater after vanadium precipitation, and adding solid sodium pyrosulfite according to the total mass of the chromium (VI) and the vanadium (V) for a first reduction reaction; detecting the concentrations of the chromium (VI) and the vanadium (V) in the wastewater after vanadium precipitation and after the first reduction reaction, and adding ferrous sulphate or ferrous chloride according to the total mass of the chromium (VI) and the vanadium (V) for a second auxiliary reduction reaction; and adjusting pH value by using alkali, neutralizing, precipitating, press filtering, and the wastewater reaching the discharge standard for discharging. The indexes of chemical oxygen demand (COD), the suspension solids (SS), the total chromium (TCr) and the chromium (VI) are easy to control after the wastewater after vanadium precipitation being treated by using the method, and all the indexes meet the wastewater discharge standard of the nation. By using the method, a small quantity of waste residue is produced, the chromium and the vanadium are fully enriched in waste residue, and the waste residue can be used as the raw material for producing the vanadium and chromium, realizing the recycle of resource, eliminating environmental pollution and reducing wastewater treatment cost.

A process for preparing food packing paper and cultural paper with chlorine free bleached paper pulp includes using corn straw or its pitch free ones as raw material, then cutting, dust removing, presoaking, cooking and bleaching. The cooking reagent uses ammonium sulfite and potassium sulfite or sodium sulfite as main, sulfur or sulfourea as assistant and urea as well as sodium hydroxide as buffer. The bleaching is two sections or multisection bleaching by using urea or sulfourea to protect fibre and activate hydrogen peroxide.

The invention relates to a fermented Kushui rose wine. The preparation method of the fermented Kushui rose wine comprises the following steps: pulping Kushui roses in distilled water to obtain rose pulp; enabling the rose pulp to be sequentially subjected to acidity regulation, sodium metabisulfite sterilization, sugar content regulation, ingredient regulation (addition of yeast nutrients) and enzymolysis impregnation, and then adding Hongjianiang wine yeast to perform fermentation so as to obtain a fermented Kushui rose wine; aging and clarifying the fermented Kushui rose wine to obtain a clarified rose wine; filtering the clarified rose wine, regulating the sugar content to 45-60 g/L, and then adding sodium metabisulfite until the SO2 content is 10-15 mg/L; and finally, sterilizing according to the conventional method, and filling into a bottle to obtain the low-alcohol fermented Kushui rose wine of which the alcohol content is 5-9%(v/v). The fermented Kushui rose wine contains abundant nutrients, is rich in volatile aromatic components, has the effects of regulating the flow of qi, relieving the depressed liver, promoting blood circulation, dissipating blood stasis, regulating menstruation, alleviating pain, protecting against free radicals and resisting aging, and can remove fatigue and promote wound healing.

The invention discloses a method for improving the solubility of potato protein by combining ultrasound with pH offset, and belongs to the technical field of protein modification. The method comprisesthe following steps: (1) peeling potatoes, dicing the peeled potatoes, and soaking the diced potatoes in a 0.12% sodium sulfite solution; (2) homogenizing the potatoes and standing for 15 minutes, centrifuging, taking a supernatant, regulating the pH value to 8.0, stirring and extracting at room temperature for 2 hours, centrifuging, taking a supernatant, regulating the pH value to 4.0, standingfor 1 hour, taking a precipitate, adding distilled water, redissolving, regulating the pH value to 7.0, and freeze-drying to obtain potato powder; (3) preparing a proper concentration of the obtainedpotato protein, and carrying out ultrasonic treatment; and (4) adjusting the pH value of the protein solution subjected to ultrasonic treatment in the step (3) to 12.0, maintaining the pH value for 1hour, and adjusting the pH value to 7.0 to obtain a modified potato protein solution. The modification method provided by the invention can greatly improve the solubility of the potato protein, and has very important significance for expanding the application field of the potato protein.

The invention relates to a preparation method of a filtrate loss reducer used for drilling fluids. With lignite as the main material, the method first prepares a sulfonated phenol-urea-formaldhyde resin mixture, which is then reacted with an alkaline solution and lignite, thus obtaining a sulfonated phenol-urea-formaldhyde resin modified lignite filtrate loss reducer. The lignite filtrate loss reducer comprises the following reactants by weight: 10%-20% of lignite; 2%-4% of one of or a mixture of NaOH and KOH; 50%-60% of water; 2%-5.5% of phenol; 8%-15% of formaldehyde; 3%-7% of urea; 0.15%-2% of a hydrolyzed acrylonitrile sodium salt; 0.125%-0.5% of polyacrylamide; and 2%-7% of a sulfonating agent (one of or a mixture of sodium sulfite, sodium bisulfite, and sodium metabisulfite).

The invention discloses a technology for extracting selenium from a low-grade selenium-containing material, and belongs to the technical field of metallurgy. According to the scheme, the technology comprises the following steps of: performing acid-oxygen leaching on the ground low-grade selenium-containing material with heating by using sulfuric acid and oxidant, wherein the selenium enters the acid-oxygen leachate in a form of selenium sulfate; filtering the acid-oxygen leachate, adding anhydrous sodium sulfite into the acid-oxygen leachate, performing primary reduction, filtering after the reduction, and returning the selenium removed water to the acid-oxygen leaching; purifying the obtained elemental crude selenium powder containing certain impurities; performing selective leaching on the crude selenium powder by using 15 percent sulfuric acid solution; filtering, and quantitatively reducing the secondary leachate by using the anhydrous sodium sulfite to obtain sponge selenium; repeatedly cleaning the sponge selenium by using hot water, drying, and thus obtaining high-purity sponge selenium powder. The technology is not limited by the grade of a raw material, is suitable for treating various selenium-containing materials containing 3 to 10 percent of selenium, and is high in selenium recovery rate (reaching over 93 percent) and low in production cost; and the whole production process does not produce waste gas, most waste water can be recycled, and only a little waste water reaching the standard is discharged after being treated, so the technology has no pollution to the environment.

The invention relates to a processing method of rose aromatized wine, which comprises the following steps: (1) grading Merlot grape fruit, sufficiently washing with water, crushing, squeezing, and adding sodium metabisulfite to obtain a grape mash; (2) adding Kushui roses, of which calyces are removed, into the grape mash, mixing, removing stems, and crushing to obtain a grape liquid; (3) adding activated pectinase into the grape liquid for impregnation for 36-48 hours, adding activated yeast, and fermenting at 22-27 DEG C by a conventional process; when the primary fermentation finishes after 10-12 days, separating new artesian wine, storing the wine in a closed fermentation tank, and carrying out secondary fermentation under the condition of not removing skin residues; when the secondary fermentation finishes after 60-90 days, removing wine legs, fully storing the wine in a tank for 2-3 months, adding chitosan and bentonite, and clarifying for 2.5 hours, thereby obtaining the clarified wine; and (4) filtering the clarified wine, adding sodium metabisulfite, sterilizing by a conventional process, and bottling. The invention has the advantages of simple production technique, low cost and low pollution.

The invention discloses a method for recycling iron waste for the fenton technology. The method comprises the following steps that hydrogen peroxide, the iron waste and an activating agent are added to waste water to be treated, stirring is conducted so that the iron waste can be dispersed in a reaction system, a reaction is conducted, and then solid and liquid separation is conducted, wherein the activating agent is any one or a mixture of sodium sulfite, potassium sulfite, magnesium sulfite, calcium sulfite, sodium thiosulfate, potassium thiosulfate, calcium thiosulfate, magnesium thiosulfate, sodium borohydride, potassium borohydride, hydroxylamine hydrochloride and ascorbic acid. By means of the method, various kinds of iron waste are recycled, meanwhile, zero iron mud emission is achieved, and thus pollution to the environment is effectively reduced. The invention further provides a water treating device capable of achieving the method. By means of the method and the water treating device, the reaction speed of the iron waste in the fenton system is greatly increased, the effective pH range of the fenton system is expanded, meanwhile zero iron mud emission is achieved, and thus pollution to the environment can be easily reduced.

The invention discloses a modified environment-friendly phenolic aldehyde thermal insulation material and a preparation method thereof. The method comprises the following steps of: sufficiently mixing 100 parts of resole, 5-15 parts of sodium sulfite, 10-30 parts of phenolsulfonic acid solution, 2-5 parts of stabilizer, 1-8 parts of nano calcium carbonate, 1-8 parts of calcium sulfate whisker, 0.1-3 parts of nano aluminum hydroxide, 0.1-3 parts of ethylene glycol and 15-30 parts of foaming agent by weight; uniformly spreading the mixture on a plane carrier; and uniformly heating through a lamination conveyor and performing foaming and curing molding. According to the invention, sodium sulfite and phenolsulfonic acid solution are used as composite catalysts; and since the sodium sulfite has the effects of deoxidizing and reducing the acidity of the mixed solution, under the joint effect of the sodium sulfite and phenolsulfonic acid solution, the corrosion of the phenolic aldehyde thermal insulation material on a metal component is avoided. The modified phenolic aldehyde thermal insulation material disclosed by the invention is far superior to the values stipulated by the national standard in terms of the indexes such as compression strength, bending strength, creep resistance, dimensional stability, water absorption and the like; and the corrosion on metals is obviously reduced in comparison with a common product.

The invention belongs to the field of wet metallurgy, and particularly relates to a method for separating and extracting vanadium and chromium from vanadium chromium leaching liquor. The method comprises the following steps of: adding sodium sulfite into the vanadium chromium leaching liquor, adjusting the pH value to 5 to 5.5; carrying out the precipitation reaction; filtering, calcining filtered solids and cooling; adding the calcination products into NaOH (sodium hydroxide) solution to obtain solid filter residue, i.e. chromium sesquioxide; adjusting the pH value of the liquid filtered after the precipitatio to 2.0 to 2.5, heating the filtered liquid to 90 to 95 DEG C, and adding ammonium sulfate to obtain precipitates, filtering the precipitates, wherein the solid filter residue is ammonium metavanadate. By adopting the moderate reduction, less reduction agent is added, the reduction action is carried out under a normal temperature condition, and the cost is reduced.