112 results about "Sodium bromate" patented technology

The invention relates to a fabric desizing agent. The fabric desizing agent is characterized by comprising the following components in parts by weight: 10-20 parts of amylase, 3-5 parts of sodium persulfate, 2-6 parts of methylcellulose, 15-25 parts of sodium chloride, 10-20 parts of n-butyl acetate, 10-20 parts of isopropanol, 1-3 parts of phthalic acid dibutyl ester, 10-25 parts of 12% hydrogen peroxide, 4-6 parts of argon sodium bromate, 5-10 parts of talcum powder, 5-8 parts of polyvinyl alcohol, and 100-160 parts of water. Compared with the prior art, the fabric desizing agent has the beneficial effects of having good desizing effect, fully hydrolyzing sizing agent without damaging the fabric, being capable of removing impurities and mineral substances on fibers, and improving whiteness and water absorption of half-finished product of the fabric.

The present invention provides a method for efficiently separating and recycling ruthenium from ruthenium-containing waste. The method comprises the steps of mixing sodium chloride and powdered carbon in powdered waste, wherein the amount of sodium chloride is 1 to 7 times of the amount needed in soluble chlorination reaction of ruthenium, and the amount of powdered carbon is 0.5 to 12 times of the needed amount; heating in chlorine atmosphere at 700 to 850 DEG C, thus obtaining soluble ruthenium salt; dissolving the ruthenium salt in water, changing ruthenium into ruthenium tetroxide by using oxidizer sodium bromate, oxidizing and distillating, and then purifying and recycling ruthenium in hydrochloric acid solution.

The present invention uses bromide and sodium (potassium) hydroxide as raw material, makes them produce disproportionation reaction, regulates specific weight and pH value, uses hydrogen peroxide to remove free bromine, and adopts the processes of cooling and dewatering to separate sodium (potassium) bromate crude product, and makes the mother liquor undergo the processes of dewatering and concentration to obtain sodium (potassium) bromide crude product. The sodium (potassium) bromide crude product is disclosed, and undergone dthe processes of removing small quantity of sodium (potassium) bromate by using urea, filtering, dewatering, concentrating, drying and packaging to obtain sodium (potassium) bromide finished product. The sodium (potassium) bromate crude product is undergone the processes of dissolving, filtering, dewatering, concentrating, drying and packaging so as to obtain sodium (potassium) bromate finished product.

The invention discloses 2-R-4'-bromomethyl biphenyl and a preparation method thereof. According to the method provided by the invention, raw materials such as 2-R-4'-methyl biphenyl, sodium bromate, sodium bromide, concentrated sulfuric acid, water and a first organic solvent are provided. The method comprises the operation of a bromination step, namely 2-R-4'-methyl biphenyl, sodium bromate, sodium bromide and the water serving as a solvent are added in a reactor and are mixed uniformly, concentrated sulfuric acid diluted with water is added dropwise in the stirring reactor at 0-50 DEG C, and the reaction system keeps reacting for 4-12 hours at 0-50 DEG C to obtain a bromination product reaction liquid. According to the preparation method provided by the invention, the required raw materials are easily available, a bromine resource is generated during the reaction process and has high reactivity, the atom economy of bromine atoms is very high, the cost is low, the process condition is stable, the operation is simple, and requirements on a reaction kettle and corollary equipment are low, so that industrialization is easy to realize.

A method for preparing hollow cerium fluoride nanometer structure material comprises the steps as follows: the oscillating reaction adopts potassium bromate, sodium bromate-organic acid or sugar-cerium-sulphuric acid, with the consistence of 0.06 plus or minus 0.04, 0.06 plus or minus 0.04, 0.02 plus or minus 0.02 and 0.6 plus or minus 0.4mol/L respectively; Naf is adopted as the fluorin source with consistence of 0.1 to 0.5mol/L; the preparative process of hydro-thermal reaction is performed under the temperature of 110 to 170 DEG C. The cerium source can be K7Ce6F31 powder, ammonium ceric nitrate or ceric ammonium sulfate; the organic acid or the sugar can use the organic matter such as propane diacid, oxalic acid, sucrose and glucose to replace the citric acid. The preparation of the hollow cerium fluoride nanometer structure material needs 12 to 100 hours in a high pressure kettle having polyfluortetraethylene as the lining. Furthermore, the invention prepares the hollow cerium fluoride nanometer structure materials with hexagonal or circular section respectively by controlling the temperature of the hydro-thermal reaction.

The invention discloses deplating liquid and a deplating method for deplating a copper base palladium-nickel alloy plating layer. The deplating liquid is obtained by homogenizing 45-55 parts of bromide, 6-10 parts of oxidant, 0.3-0.6 part of corrosion inhibitor-benzotriazole and 40-60 parts of water; the pH value of the deplating liquid is less than 4; the bromide is one or a composition of two of hydrobromic acid and sodium bromide; and the oxidant is two or compositions of more than two of hydrogen peroxide water solution, manganese dioxide, sodium bromate and high sodium bromate. A bromination method is adopted to remove the palladium-nickel alloy plating layer on a copper matrix; the plating layer is deplated thoroughly and efficiently; the process is simple; the corrosion of the copper matrix is slight; the separation of the copper matrix and the palladium-nickel alloy plating layer in the plating part is realized, that is, the deplating of the copper base palladium-nickel alloy plating layer is realized; and after the deplating liquid is saturated, patalldium and nickel can be recovered therefrom.

The invention provides an insulating coating. The insulating coating is obtained by mixing evenly a raw material mixture; the raw material mixture contains a dihydric phosphate, an oxidizing agent, a silane coupling agent, an acid, a water soluble silicate and water; the oxidizing agent is at least one of sodium perchlorate, potassium permanganate, hydrogen peroxide, sodium chlorate, sodium nitrite, zinc nitrate, sodium persulfate, sodium bromate, ammonium peroxydisulfate, sodium molybdate and cobalt nitrate. The invention also provides an electrical steel material. The invention also provides a preparation method of the electrical steel material. The invention further provides the electrical steel material obtained according to the preparation method of the electrical steel material. The insulating coating after curing has good heat resistance, insulativity, adhesiveness, corrosion resistance, punching and shearing processability and other properties.

The invention discloses an alkaline chemical polishing method and an adopted alkaline chemical polishing solution thereof. The method comprises the steps that aluminum and/or aluminum alloy is put in absolute ethyl alcohol to conduct pretreatment, and then deionized water is utilized to wash the aluminum and/or the aluminum alloy cleanly; the pretreated aluminum and/or the pretreated aluminum alloy is put in the alkaline chemical polishing solution to conduct alkaline chemical polishing; the polished aluminum and/or the polished aluminum alloy is sequentially put in dilute nitric acid to be neutralized and put in the deionized water to conduct ultrasonic cleaning for 5-15 min, and then the treated aluminum and/or the treated aluminum alloy is taken out and dried. The alkaline chemical polishing solution is an aqueous solution composed of the following components, 100-500 g/L sodium hydroxide, 50-200 g/L sodium nitrate, 100-500 g/L sodium acetate, 10-150 g/L sodium bromate, 5-20 g/L sodium fluoride and 0.1-4 g/L heavy-metal sulfate. The alkaline chemical polishing method is friendly to the environment, the brightness and the flatness of polished aluminum alloy surface are both better.

The invention relates to a normal-temperature film passivating agent for processing before electro-coating of iron and steel workpiece, containing the following raw materials in percentage by mass: 3-8% of phytic acid, 1-3% of citric acid, 1-3% of fluorozirconate, 0.1-2% of sodium bromate, 2-6% of sodium benzoate, 1-3% of sodium carbonate, 5-9% of triethanolamine and the balance of tap water. Thepreparation method comprises the steps as follows: adding tap water in a reaction kettle; turning on a stirrer with rotational speed of about 450-550 revolutions/min; adding sodium carbonate, sodium benzoate, sodium bromate, triethanolamine, phytic acid, citric acid and fluozirconate in sequence, stirring for 0.5-1.5h so as to lead the solution to be lavender and evenly transparent; sampling, examining, filling and packing. The passivating agent can be used at normal temperature so that the whole chemical processing process is simple, and the operation is convenient; the heating device is saved as heating is unnecessary, the production cost is low, no toxic or harmful substances are discharged, and the normal-temperature film passivating agent is good for the health of operators and the environmental protection. The preparation process is simple, and easy for control and operation.

The invention relates to a hair curling method which comprises the following steps: cleaning hair, flushing, drying, applying a first dose of a hair curling agent, flushing, drying, curling the hair, applying a second dose of the hair curling agent, flushing, cleaning, styling, finishing and the like. The first dose of the hair curling agent comprises the following components by weight percent: 5.0-15.0% of mercapto-2-acid ammonia, 1.0-9.0% of water soluble lanolin, 0.2-4.2% of sodium sulfite, 2-12% of ammonia, 0-3.3% of fragrance, 0.3-4% of Tween 20 and 62.5-90% of water. The second dose of the hair curling agent comprises the following components by weight percent: 7-13% of sodium bromate, 0.5-5% of water soluble lanolin, 2-8% of sorbitol, 0-0.3% of fragrance and 79.7-84.5% of water. The hair curling method can keep the time and implement hair curling according to the expected hair style by controlling the application time of the first dose and the second dose of the hair curling agent and combining with hair curling tools, thereby leading a user to curl the hair arbitrarily.

The invention relates to a wet gold extraction method, and is a quick and non-toxic gold extraction method. The method uses the solution of sodium bromate, sodium chloride and vitriol as the gold leaching solution, polyurethane foam as the substance to absorb gold, sodium sulfite solution as a desorption agent, oxalic acid as a reducing agent, hydrochloride solution as recycling agent of polyurenthane foam, extract gold from oxide ore with the sulfur content of no more than 2% and gold concentrate after roasting. The method of the invention is non-toxic and the gold leaching speed is a few to a dozen times as fast as that in cyannidation.

The invention discloses a preparation method for 5-bromomethyl-2,3-dimethylpyridine dicarboxylate. 5-bromomethyl-2,3-dimethylpyridine dicarboxylate is prepared with 5-methyl-2,3-dimethylpyridine dicarboxylate as a starting raw material though a bromination reaction in an organic solvent in the presence of azodiisobutyronitrile, wherein the bromination reaction is carried out on 5-methyl-2,3-dimethylpyridine dicarboxylate and hydrobromic acid in the presence of sodium bromated. The method provided by the invention employs hydrobromic acid as a bromination reagent and uses sodium bromate and azodiisobutyronitrile as initiators, so production of by-products can substantially reduced, only about 1% of by-products are produced in a single reaction, and only about 2% of by-products are produced in circular reactions; and thus, yield of 90% or above can be realized through cyclical and indiscriminate reactions.

The invention discloses a synthetic method and application of photocatalyst Bi5O7Br, belongs to the technical field of nano materials, and can solve the problem that current preparation of a Bi5O7Br catalyst requires conditions such as high temperature, high pressure, long-term reaction and an organic solvent for dissolution. The Bi5O7Br photocatalyst with a narrower band gap, stronger visible light response capability and single composition is obtained by using bismuth nitrate pentahydrate and sodium bromate as raw materials and ammonia water as a pH adjusting agent through a simple economical environmentally-friendly normal-temperature hydrolysis process. According to the method provided by the invention, the raw materials used in the method are cheap and easy to obtain, no organic solvent is used, and the method is simple, easy to implement, economical and environmentally friendly, does not produce toxic or harmful by-products, uses normal-temperature normal-pressure conditions, issimple and safe, and easily realizes industrial production.

The present invention refers to a process for the preparation of 2-bromomethyl-6-methyl-benzoic acid (I) and derivatives thereof by selective bromination of 2,6-dimethylbenzoic acid (II) with sodium bromate and hydrobromic acid in the presence of light.

The invention discloses chromate-free passivant for cold-roll steel sheet and galvanized steel sheet roller coating before coating. According to the chromate-free passivant for cold-roll steel sheet and galvanized steel sheet roller coating, the bonding force between a surface and a roller coating film can reach the level 0. The chromate-free passivant includes, by mass percent, 4-8% of hexafluorozirconic acid with the mass concentration being 50%, 0.1-0.6% of phytic acid with the mass concentration being 50%, 0.1-0.8% of citric acid, 0.5-1.5% of sodium bromated, 0.1-0.5% of ammonium molybdate, 0.5-1.5% of manganous nitrate, 0.1-0.5% of ferric nitrate, 1-2.5% of ammonium bicarbonate, 1-2.5% of ammonium bifluoride and the balance pure water. The preparing method includes the steps that the pure water which is calculated and weighed is added into a stainless steel reaction kettle, a stirrer is started, and the rotating speed is controlled to be 60-80 turns per minute; and then the hexafluorozirconic acid, the phytic acid, the citric acid, the sodium bromated, the ammonium molybdate, the manganous nitrate, the ferric nitrate, the ammonium bicarbonate and the ammonium bifluoride which are calculated and weighed are slowly added into the reaction kettle in sequence, and stirring is conducted while adding is performed till a solution is in a maize-yellow or light brown transparent state.

This invention relates to an Eco-friendly method of preparation of high purity tetrabromobisphenol-A through the bromination of bisphenol-A (BPA) with a combination of bromide and bromate ions in organic solvent and water, reacting bromide salt of alkali or alkaline earth metal/hydrobromic acid and bromate as alkali/alkaline earth metal salt, optionally adding 12 N hydrochloric acid in case of metal bromide or equivalents in case of hydrobromic acid, adding alkyl sulfate salts having C6-C18 carbon chain as a surfactant at 5 to 45 DEG C over a period of 4 to 5 h under stirring, separating the crystalline (50-70 %) product; washing and drying of the product at 100 DEG C, and charging the organic layer containing un-reacted bisphenol-A, mono-, di- and tri-bromo derivatives and TBBPA with additional bisphenol-A and repeating the above process to yield 95-100 % of TBBPA in the subsequent batches.

The invention relates to an energy-conserving sodium bromate purifying method. The method includes the following steps: (1) the raw sodium bromate is dissolved; (2) barium hydroxide, chitosan and active carbon are added and then the solution is stirred and dissolved for 40 to 50 minutes to lead sulfate to be separated out in the barium sulfate salt form, the color to be absorbed by active carbon and the chitosan and heavy metals to be absorbed and chelated by the chitosan; (3) the solution is filtered; (4) the solution is cooled and stirred; (5) solids and liquid are separated under eccentric effect; (6) after the separation between solids and liquid, the liquid is replaced into the No1 reaction kettle and the steps are repeated. The method is characterized in that: dissolving degree of the sodium bromate under special temperatures is utilized to obtain the corresponding supersaturate solution and then the required product can be obtained through decoloring, impurity-removing, filtering, cooling, crystallizing and drying. Compared with the prior purifying method, the method has the advantages that second-time evaporation is avoided; water and stream can be conserved; the color of product is better, the purity is high and the like. The method is ideal for the bromate purification in the modern industrial manufacturing.

The invention provides a safe and non-toxic dyeing and perming agent, a preparation method and application, and belongs to the field of special cosmetics. The dyeing and perming agent is a melanin dyeing and perming agent integrating dyeing and perming, and comprises an agent A1, an agent A2, an agent B and an agent C, wherein the agent A1 is a mercaptoacetic acid, mercaptoacetate or cysteine reducing agent solution; the agent A2 comprises cystine or a derivative thereof, a buffer solution and a melanin precursor substance; the agent B is sodium bromate or a hydrogen peroxide type oxidizing agent solution; and the agent C comprises a melanin precursor substance, a buffer solution and an oxidizing agent. The melanin precursor substance is used for dyeing hair, and phenylenediamine substances with high carcinogenic and sensitization risks are avoided. The hair dyeing process is combined with the perming process, dyeing and perming are integrated, and secondary damage to hair due to the fact that perming is conducted before dyeing is not needed. Melanin is attached to the surface of hair, has a good ultraviolet shielding effect, can protect hair keratin against yellowing and embrittlement caused by ultraviolet rays, and protects damaged hair.

The invention discloses a chaotropic agent and a method for extracting genomic DNA by using the chaotropic agent. The chaotropic agent contains sodium bromate, and the compound can rapidly and effectively separate histone in a nucleosomal structure from the genomic DNA. The method for extracting genomic DNA by using the chaotropic agent includes the steps that a cell lysis solution is added in a sample to make cells rupture; the mixture is then mixed evenly with the chaotropic agent, and an object is obtained after the histone and the genomic DNA are separated; protein extracting liquid is added, uniform mixing is conducted, and after centrifugation, supernatant is obtained after protein is extracted; the supernatant is mixed with a DNA precipitant, and after centrifugation, a DNA precipitate is obtained. The method has the following advantages that compared with the method for extracting genomic DNA by using sodium perchlorate, the type of the chaotropic agent is different, the valence is lower, and the yield and purity of the genomic DNA are more appropriate; compared with the traditional protease K method, long-time digestion is not needed, a great deal of time is saved, the defects that the activity of protease K is easy to change and digestion is insufficient are avoided, the repeatability is good and the stability is high.

The invention discloses a white-powder-free erasable zinc-series phosphatizing agent. The white-powder-free erasable zinc-series phosphatizing agent comprises the following raw materials in percentage by mass: 8 to 28% of phosphoric acid with mass concentration of 85%, 6 to 14% of nitric acid with mass concentration of 65%, 5 to 15% of zinc oxide, 1 to 4% of sodium bromate, 0.1 to 1% of citric acid, 0.1 to 1% of phytic acid with mass concentration of 50%, 0.5 to 2.5% of sodium hexametaphosphate, 0.5 to 2.5% of diammonium hydrogen phosphate, 0.05 to 0.10% of hydroquinone, 0.1 to 0.5% of ferric nitrate, 1 to 1.5% of ethylene glycol monobutyl ether, 1 to 1.5% of special surface active agent for soak degreasing, and the balance of water. The preparation method comprises the following steps in sequence: adding weighed water to a stainless steel reacting kettle; slowly and sequentially adding phosphoric acid, nitric acid and zinc oxide to the reacting kettle; slowly adding citric acid, phytic acid, sodium bromate, sodium hexametaphosphate, diammonium hydrogen phosphate, hydroquinone, ferric nitrate, ethylene glycol monobutyl ether and special surface active agent for soak degreasing to the reacting kettle; and continuously stirring until the solution appears as light beige and transparent liquid.

The invention relates to a platinum/platinum dichloride composite material having a cubic crystal structure, and a nonlinear synthesis method and an application thereof. The method comprises the following steps: S1, reacting p-nitrophenol, sodium bromate and sulfuric acid at room temperature, and recording the chemical oscillation reaction by using an open circuit-time curve; and S2, adding a platinum dichloride raw material to the system at one time in the reaction process, taking out a reaction solution obtained after the reaction finished, centrifuging the reaction solution, and cleaning the obtained reaction product to obtain the platinum/platinum dichloride catalysis composite material having the cubic crystal structure. The preparation method innovatively combines nonlinear chemicaloscillation with the preparation of noble metals to obtain the platinum/platinum dichloride catalysis composite material having the cubic crystal structure, with an excellent hydrogen production performance, and the platinum/platinum dichloride catalysis composite material having the cubic crystal structure can be used in the field of water electrolysis for water production, and has a good application prospect and a good industrialization potential.

The invention discloses an electrolytic bath capable of realizing automatic matching and used for sodium bromate production and relates to the technical field of electrolysis. The electrolytic bath comprises a base, a case and an electrolytic bath body, wherein the top of the electrolytic bath body is movably connected with a box cover, the top of the base is fixedly connected with the bottom of the case, the top of the case is fixedly connected with the bottom of the electrolytic bath body, a power box is fixedly connected between the top of the base and the right side of the case, and a piston cylinder is fixedly connected with the top of the power box. According to the electrolytic bath capable of realizing automatic matching and used for sodium bromate production, three partition boards are arranged in the piston cylinder to divide the inner space into 1.5:2:1, an electrolysis aid, an organic stabilizer A and an organic complexing agent B can be drawn simultaneously through cooperation of three liquid inlet pipes and liquid outlet pipes, drawing can be performed according to required proportion, the mixture is discharged into the electrolysis bath body after being mixed by a mixing box, a complex step of matching materials in proportion in advance is omitted, the processing efficiency is improved, materials are added strictly in proportion, and the electrolysis efficiency is guaranteed.