76 results about "Sodium formaldehydesulfoxylate" patented technology

The invention relates to a multi-project detector for detecting the security of food. The operational power supply separately provides the power to a light path part, a monolithic processor and an auxiliary circuit part. The monolithic processor is separately connected with the light path part, the auxiliary circuit part, an input part and an output part. And the monolithic processor and the auxiliary circuit part are used for calculating and controlling, the input part and the output part are used to input and output the information. The invention can detect the chemical substances which have harm to human body like agricultural chemicals, sulphur dioxide, nitrous acid, rongalite lump, hydrogen peroxide, methyl alcohol, dairy product protein, nitrate and heavy metal, the detecting result is accurate, the detecting speed is quick, the density can be directly showed, the man-machine contact surface is friendly, and the invention has the functions of data storage, inquiry, result printing and GPRS wireless transmission to data server. The invention can be used in real-time, and has the advantages of high detecting efficiency and high automaticity, convenient carrying, practical using, low cost and good effect.

The invention provides water-based ink resin for PVC furniture membranes and a preparation method of the water-based ink resin. Raw materials of the water-based ink resin for the PVC furniture membranes comprise an anionic emulsifier, a nonionic emulsifier, a pH buffering agent, an initiator, a chain transfer agent, a methyl methacrylate monomer, a methyl acrylate monomer, a glycidyl methacrylate monomer, tert-butyl hydroperoxide, rongalite, a preservative, and deionized water; based on a design concept of ''polymer welding'', an emulsion-type resin which is well compatible to PVC and of which glass transition temperature is similar to that of the PVC is prepared and designed, wherein the main body of the emulsion-type resin is poly(methyl methacrylate-methyl acrylate), and the high peeling strength of the water-based ink resin and the PVC furniture membranes is guaranteed; and meanwhile, a characteristic that the PVC furniture membranes have a large number of plasticizers is combined, a proper amount of the glycidyl methacrylate monomer with epoxy groups is introduced to a copolymerization monomer system, and therefore the plasticizer migration resistant ability of the water-based ink resin is improved.

The invention discloses a bleaching production method for washing iron-dyed kaolin, and relates to kaolin. The invention provides a bleaching production method for washing iron-dyed kaolin, which can obtain higher brightness, can realize wastewater recycle and environment-friendly clean production and is suitable for large-scale production. The method definitely gives the process parameters such as the using amount of sodium hydrosulfite, a pH value, solid-liquid ratio, reaction time, adding amount of complexing agent and complexing time, bleaching times, adding amount of sewage treating agent, a pH value of the wastewater and the like to achieve the optimal bleaching effect on the washing iron-dyed kaolin. The natural whiteness of the iron-dyed kaolin can be improved to over 80 percent from about 60 percent, and the sintering whiteness can be improved to over 90 percent from about 87 percent, which meet the whiteness requirements of high-grade daily ceramic raw materials. Meanwhile, the method can treat and recycle the wastewater.

A dye discharging ink for inkjet printing including at least a reducing agent and an amine compound. Embodiments of the dye discharging ink include, as the reducing agent, a sulphur reducing agent such as Rongalite, and, as the amine compound, an alcohol amine compound such as triethanolamine. Embodiments of the dye discharging ink also include a surface active surfactant and/or an antirust agent, and a pH in a range from 9.5 to 11.0. The dye discharging ink for inkjet printing can prevent corrosion of head nozzles due to acidic substances produced by decomposition of a reducing agent, so as to decrease inhibition of linear advancing property of ejected ink, and can prevent decrease in discharging capability due to hydrolysis of the reducing agent.

The invention relates to a method for bleaching high-concentration kaolin pulp. The kaolin pulp concentration is 25%-30%. The method comprises the following steps: adding an alkaline agent to water, mixing and adding rongalite to prepare rongalite aqueous solution, wherein, the weight ratio of sodium hydroxide to sodium carbonate in the alkaline agent is 0.33-0.47:10, the weight ratio of the rongalite to the alkaline agents is 100:10.3-10.5, rongalite volume concentration of the rongalite aqueous solution is 10-15% and the pH value of the rongalite aqueous solution is 7.0-8.0; delivering the rongalite aqueous solution and the high-concentration kaolin pulp to a conduit by a pump for mixing, and delivering the mixture to a pulp storage tank, wherein, the added amount of the rongalite aqueous solution is 1.4-2.3% of that of the high-concentration kaolin pulp; and keeping standing and bleaching for 15-20 hours, and adjusting the pH value of the pulp to 2.5-3.0 after bleaching. The method has the advantages of reasonable technical proposal, easy control of operation, stable process, and the bleached high-concentration pulp is beneficial to subsequent filter pressing dehydration processing, which improves the production capacity, reduces the energy consumption and medicament consumption, lowers the production cost and stabilizes quality of kaolin products.

The invention relates to a nitrile rubber and a preparation method thereof. The nitrile rubber is prepared from the following polymerization monomers by mass percent: 50-78% of C4-C5 aliphatic conjugate diene monomer, 20-48% of vinyl nitrile monomer and 1.0-5.0% of unsaturated amine or phenolic antioxidant monomer. By adopting a low-temperature polymerization way, an organic peroxide rongalite is used for oxidizing and reducing an initiating system, by increasing the addition of an emulsion system and a molecular weight regulator, the polymerization reaction is carried out smoothly, and molecular parameters of a polymer can be effectively regulated. The preparation method is simple in process and high in polymerization rate, and improves the stability of mucilage in the polymerization process. The content of N-(p-anilino phenyl) unsaturated amide or imide in the polymer is higher, and effective copolymerization of an antiager monomer of the N-(p-anilino phenyl) unsaturated amide or imide and C4-C5 aliphatic conjugate dienes and cyanoethylene is realized.

The invention relates to kaoline alkaline static bleaching technology. The technology comprises: evenly mixing classified kaoline ore slurry and rongalite, standing the mixture for a while, adding a regulator into the mixture, controlling the ore slurry pH value to between 3 and 5, and evenly stirring the mixture to obtain the product. The technology has the advantages of simple operation, easy realization in production and obvious effect, can be widely used in kaoline processing enterprises and has great popularization value and application prospect.

The invention is the antibacterial, waterproofing, anti-aging nano pure-acrylic emulsion relating to a kind of constructing emulsion used for preparing inside and outside wall dope. The component proportions of the invention are: deionized water 42%, n-butyl acrylate (BA) 24%, methyl methacrylate (MMA) 23.6%, non-ionic emulsifier (MS-01) 2%, nano-ZnO 1.8%, nano-TiO2 1.2%, anion emulsifier (DSB) 1%, N-methylolacrylamide (N-MAM) 1%, acrylic acid (AA) 0.8%, tert-butyl hydroperoxide (TDHP) 0.6%, sodium formaldehydesulfoxylate (SFS) 0.6%, ammonium persulfate (APS) 0.4%, polymerizable emulsifier (AMPS) 0.4%, NaHCO3 0.2%, and AMP-95 0.2%. According to the said weight proportions, prepare the emulsion through pre-emulsifying, milling, and polymerizing at high temperature.

The invention is the synthesizing method of nano compound emulsion relating to a kind of constructing emulsion used for preparing inside and outside wall dope. The component proportions of the invention are: deionized water 42%, n-butyl acrylate (BA) 22%, methyl methacrylate (MMA) 22%, organosilicon monomer (ethylene triethoxy silicon hydride A-151) 4.1%, non-ionic emulsifier (OP-10) 1.5%, nano-SiO2 1.5%, nano-TiO2 1.2%, anion emulsifier (DSB) 1%, N-methylolacrylamide (N-MAM) 1%, methylacrylic acid (MAA) 1%, polymerizable emulsifier AMPS 0.5%, ammonia 0.5%, tert-butyl hydroperoxide (TDHP) 0.5úÑ, sodium formaldehydesulfoxylate (SFS) 0.5%, ammonium persulfate (APS) 0.4%, and NaHCO3 0.3%. According to the said weight proportions, prepare the emulsion through emulsifying, milling, drop adding and polymerizing at high temperature.

The invention discloses a novel discharging agent for textile printing and dyeing. The novel discharging agent is prepared by the following components in parts by weight: 3 to 8 parts of fatty alcohol-polyoxyethylene ether, 3 to 6 parts of epichlorohydrin, 3 to 7 parts of boric acid, 5 to 10 parts of polyethylene glycol oil-based ether, 3 to 7 parts of polyvinylpyrrolidone, 2 to 3 parts of N-benyl-2-naphthylamine, 3 to 7 parts of sodium hydroxide, 11 to 12 parts of thiourea dioxide, 3 to 6 parts of rongalite, 7 to 12 parts of linear alkyl benzene sulphonic acid, 3 to 5 parts of ammonium sulfate, 17 to 22 parts of ethylene glycol, and 20 to 30 parts of deionized water. The novel discharging agent has the advantages that a modifying method is simple, the stability of a product is good, and the discharging effect of the thiourea dioxide can be improved; the defects of low solubility because of using the convention thiourea dioxide as the discharging agent for discharging and dyeing and the poorer dispersing uniformity, poorer net permeating property, insufficient playing of discharging function and the like in the discharging liquid are overcome.

This invention relates to a method for producing low-zinc rongalite. The method comprises: mixing water and zinc powder, beating, adding SO2, reacting to obtain zinc hydrosulfite, placing in a reaction pot, adding formaldehyde and zinc powder, reacting to obtain alkaline sodium formaldehyde sulfoxylate, precipitating, removing the supernatant, adding NaOH, reacting to obtain sodium formaldehyde sulfoxylate, filtering, standing for settlement, cooling, adjusting the pH value, performing ultrafiltration, mixing, adding NaOH, sending into an evaporator, evaporating to obtain melt of low-zinc sodium formaldehyde sulfoxylate, cooling, solidifying, and pulverizing to obtain the final product. The obtained low-zinc rongalite can satisfy the requirements of pharmaceutical and plastic industries. The zinc content is less than or equal to 50 ppm. The low-zinc rongalite has such advantages as high purity, high stability, low production cost and convenient usage.

The invention discloses a preparation method of aromatic polybenzimidazole, comprising the following steps: 1, under the protection of nitrogen, adding aromatic tetramine and diacid monomer with equimolar ratio in a strongly acidic solution to conduct condensation polymerization with the reaction temperature of 100-250 DEG C and the reaction time of 0.5-30h; 2, pouring the product of the step 1 in water and precipitating to obtain a polymer, washing the polymer with water repeatedly, immersing in an alkaline solution to remove residual acid, and then immersing in boiling water containing rongalite for 0.5-6h; and 3, drying the product of the step 2 in a vacuum environment with the temperature of 50-150 DEG C to obtain the aromatic polybenzimidazole. The method has the advantages of high molecular weight, good thermal stability, excellent dissolubility and film forming property, etc.

The present invention relates to a method for preparing a weather resistant reinforced acrylate based resin. More specifically, an activator-free conversion rate improver is included in an acrylate-styrene based graft copolymer, thereby improving the haze value, light transmittance, and yellow index when mixed with an acrylate-styrene based non-graft copolymer, and securing the weather resistance. In particular, according to the present invention, a weather resistant reinforced thermoplastic resin having excellent colors which are close to natural colors can be provided even without using sodium formaldehyde sulfoxylate (SFS) and iron ions.

The invention belongs to the field of polymer materials, and relates to a h igh-rubber ASA resin powder and a preparation method thereof. The preparation method of the high-rubber ASA resin powder comprises the following steps: 1) preparation of a seed; 2) preparation of a core; 3) preparation of a shell; and 4) post-treatment, wherein an emulsifier adopted in step 1) to step 3) is a mixture of ananionic surfactant and a nonionic surfactant, and a mass ratio of the anionic surfactant to the nonionic surfactant is (8-9):1; and a reducer solution adopted in the step 1) to step 3) is prepared through dissolving 0.1 g of ferrous sulfate, 1.5 g of sodium formaldehydesulfoxylate and 2 g of ethylenediaminetetraacetic acid in 500 g of deionized water. The preparation method has the advantages oflow temperature in the synthesis process, low energy consumption, easiness in operation, and high conversion rate; the impact strength of the obtained product is greatly improved, is equivalent to that of foreign products, and can basically meet requirements of most application fields; and the autonomous production of the high-rubber ASA resin powder is realized.

The invention discloses a printing and dyeing process of denim. The printing and dyeing process comprises the following steps: (1) grey cloth pretreatment; (2) paste mixing and printing: mixing printing paste, cooperatively using pigment printing paste and sulfur dye printing paste, controlling the viscosity at 40000-45000Pa.S, printing by using a flat screen printing machine, and drying at the temperature of 100-105 DEG C, wherein the pigment printing paste is prepared from the following components in parts by mass: 14-16 parts of pigment color paste, 30-35 parts of waterborne polyurethane binder, 45-50 parts of emulsified paste and 7-9 parts of urea; the sulfur dye printing paste is prepared from the following components in parts by mass: 7-8 parts of sulfur dye, 25-30 parts of sodium formaldehydesulfoxylate dehydrate, 30-35 parts of etherified starch paste, 12-14 parts of sodium carbonate, 8-9 parts of glycerin and 16-18 parts of warm water; (3) ageing; (4) oxidant spraying; (5) washing; (6) shaping. The printing and dyeing process is simple in operation, little in environment pollution, rich in design and color and favorable in printing and spraying effects.

The invention relates to a method for preparing low-zinc low-iron clear rongalite, which comprises the steps that: rongalite solution is used as a raw material and quinoline organic precipitator is used for precipitating zinc and ferrous ions in the solution before concentration; then, sampling and filtering are carried out, ammonia-ammonium chloride with the pH of 10 is used for buffering the solution with Eriochrome black T as a visualization reagent, and the content of the residual zinc ions in filtrate is measured by colorimetry; after the measured value meets the control requirement of 1 to 3mg/L, stirring is stopped, after precipitation and aging are carried out for 2 to 3 hours, precipitates are filtered away and then the filtrate is colorless and transparent; then, cooling for crystallization, crushing and packaging are carried out for obtaining the products of the clear rongalite with zinc and ferrous contents lower than 10PPm after the filtrate is concentrated to the content of over 98 percent at a vacuum level ranging from minus 0.085 to minus 0.095mPa and temperature lower than 75 DEG C. The invention has the advantages that the products prepared by the method have good stability and zinc and ferrous contents of lower than 10PPm, thus meeting special requirements on rongalite products by industries such as medicine and rubber, etc.

The invention relates to a method which utilizes sodium salicylate solution to refine, process and produce salicylic acid. Phenol reacts with liquid alkali, so that sodium phenolate is generated, the dried sodium phenolate reacts with carbon dioxide to generate sodium salicylate, which is then resolved in water, and therefore the sodium salicylate solution is produced. The first step is to regulate the pH value, that is, the sodium salicylate solution with twenty to forty percent of mass concentration is heated until 50 DEG C to 75 DEG C, and the pH value is regulated to four to six; the second step is to preserve heat, that is, the sodium salicylate solution is added with activated carbon and thermally insulated for two to four hours under the condition of temperature between 50 DEG C and 75 DEG C; the third step is filtration, the sodium salicylate solution is filtered, the filtrate is added with rongalite when filtrate is clean, and after five to twenty minutes, the filtrate is filtered into an acid eduction pot; in the fourth step, the salicylic acid is separated out from the acid eduction pot by utilizing vitriol to regulate the pH valve to one to two point five, and a pure product with more than ninety nine point three percent of content is produced after temperature reduction, filtration, washing and drying of the salicylic acid. The production technique of the invention has the advantages of simple process, convenient operation, little pollution, low material consumption and high purity of products, and meanwhile, the invention is convenient for industrialized production.

The invention disclosed a method for detecting rongalite in food. The method is characterized by comprising the following steps of 1, solution preparation: preparing a solution A, a solution B, a solution C and a solution D; 2, sample treatment: weighing 1-5 g of a cutout sample in a triangular flask, adding distilled water to 20-80 mL, ultrasonic extracting for 1 - 6 min, and filtering, with the filtrate for use; 3, operation method: taking two 5-30 mL colorimetric tubes (numbered as tube A and tube B with a marker), adding 0.5-5 mL of a sample liquid to each tube, dropping 1-6 drops of the D solution in the A tube, waiting for 0.5-2 min, adding 2-10 drops of the solution A and 2-10 drops of the solution B into the two tubes respectively, shaking uniformly, standing for 5-20 min, shaking for 3-10 times during the standing process, adding 0.05-0.2 mL of the solution C, shaking for 10-40 seconds, standing for 1-10 min, adding the distilled water to a scale mark of 2-8 mL. The method for detecting the rongalite has very high efficiency and wide market prospects.

The invention provides concrete with improved construction performance. The concrete comprises, in parts by weight, 400-500 parts of cement clinker, 10-20 parts of an expanding agent, 80-120 parts of gypsum, 1-2 parts of a pH value adjusting agent, 8-10 parts of a water reducer, 300-400 parts of quartz sand, and 50-100 parts of furnace slag. The water reducer comprises methyl vinyl polyoxyethylene ether, water, acrylic acid, an oxidant, an amine promoter, a chain transfer agent, formaldehydehydrosulfite (also named as rongalite) and an alkali. The concrete is high in strength and good in construction performance.

The invention discloses a simulated digital discharge printing process, which comprises the following steps of 1, dyeing; 2, pattern printing (pattern printing paste in the pattern printing step includes rongalite, sodium carbonate and glycerin); 3, steaming; 4, water washing (the water washing steps comprise once normal temperature water jar water washing and three times of hot water jar water washing); 5, paste removal shaping. The cloth is subjected to simulated digital discharge printing on the cloth; the characteristics of good environment-friendly effect, fine patterns and operation simplicity are realized. The process can be applicable to the simulated digital discharge printing process of artificial cotton, full cotton and terylene fabrics.

The invention discloses a preparation method for vulcanized reactive dye, which comprises the following steps: under the condition that 2,4-dinitrochlorobenzene and sodium hydroxide solution are near boiling, hydrolyzing to prepare the dinitrophenol sodium solution; then, heating and boiling the dinitrophenol sodium solution with sodium polysulfide aqueous solution at a certain molecular ratio; under the condition of pressurization or non pressurization, reducing and carrying out sulphureting reaction to prepare; after sulphureting reaction is finished, drying directly by a roller drier to obtain raw dye; and splicing and mixing to obtain commodity dye. The preparation method for the vulcanized reactive dye has the beneficial effect that sodium sulfide or sodium hydrosulfite is used for reducing into a water-soluble leuco body when the vulcanized dye is used, and the water-soluble leuco body is adsorbed by a dyed object to be changed into the original insoluble colored object by the oxidation or other actions to fix the dye on the dyed object.