111 results about "Rongalite" patented technology

The invention relates to the technical field of building material admixtures, in particular to a room-temperature preparation method for a high-efficiency polycarboxylic acid water reducing agent. The preparation method adopts methyl allyl polyethenoxy ether and acrylic acid as reactive monomers, and adopts hydrogen peroxide as an oxide agent and sodium formaldehyde sulfoxylate as a reducing agent to build an oxidation-reduction system. The specific synthetic method comprises the following steps: adopting methyl allyl polyethenoxy ether, hydrogen peroxide and deionized water as a base solution; dropwise adding a water solution A of acrylic acid and a chain transferring agent, and a water solution B of sodium formaldehyde sulfoxylate; enabling radical polymerization reaction at room temperature. The preparation method can be carried out for synthesis at the room temperature, and is economical, environment-friendly, low in energy consumption and simple in preparation technology, and the synthesized water reducing agent is high in water-reducing rate, good in fluidity and good in slump retaining performance.

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.

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 discloses a concrete mud retarder. The concrete mud retarder comprises 50-80wt% of an aqueous polymer, 5-20wt% of gallic acid and 10-30wt% of diethylene glycol. A production technology of the aqueous polymer comprises the following steps: 1, taking 4-7 parts by weight of hydrogen peroxide and 8 parts by weight of water, and completely dissolving hydrogen peroxide in water to obtain a solution I; 2, taking 2-4 parts by weight of rongalite and 8 parts by weight of water, and completely dissolving rongalite in water to obtain a solution; 3, adding 35-40 parts by weight of water, respectively adding 7 parts by weight of acrylamide, 9 parts by weight of maleic anhydride and 21 parts by weight of allyl ether, and stirring; 4, adding 0.5-2 parts by weight of a chain transferring agent; and 5, heating to 40DEG C, simultaneously adding the solution I and the solution II in a dropwise manner, and controlling the reaction temperature to be 40-50DEG C and the dropwise addition time to be 2-4h, and cooling to 30DEG C after the above reaction in order to obtain the aqueous polymer with the solid content of 38-42%. The concrete mud retarder can reduce adsorption of a concrete water reducer on soil particles, improves the fluidity of a high-mud concrete system, and greatly improves the slump keeping property of the concrete water reducer.

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 improved production process of formaldehyde sodium sulfoxylate activator includes making slurry with zinc powder and deionized water in the weight ratio of 1 to 4.545; pumping the slurry into the first reactor and introducing SO2 gas at 55 deg.c until the material becomes yellow; adding formaldehyde in 1.65 times the initial zinc powder weight into the second reactor, adding the material from the first reactor, heating to 100 deg.c while stirring, adding zinc powder of 0.82 time the initial amount, lowering the temperature to 70 deg.c, said vacuum dewatering to water content of not more than 20 %; adding deionized water in the amount of 1.3 times the initial water weight to the third reactor, adding the dewatered material, heating to 70 deg.c under stirring, adding EAC stabilizer in the amount of 1 % of zinc powder weight slowly, adding NaOH after 10 min to pH 11, filtering and collecting product.

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 invention discloses a method for detecting rongalit in food by a gas chromatograph mass spectrometer. The method comprises the following steps that 1, 1g of food specimens are added into a top hollow bottle; 1 to 3ml pf 0.05 mol/L EDTA (ethylene diamine tetraacetic acid) solution and 1 to 3 ml of 0.05 mol/L sodium acetate solution are added, and the materials are compacted after being uniformly stirred and are fed onto a machine to be tested; 2, the gas chromatograph mass spectrometer is adopted for testing the content of sodium formaldehyde sulfoxylate in the top hollow bottle. The invention aims at providing the method for detecting the rongalit in food by the gas chromatograph mass spectrometer with the advantages that the testing is accurate, the operation is simple, and the time consumption is low.

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.