107 results about "Potassium bromate" patented technology

A method for polishing Through-Silicon Via (TSV) wafers is provided. The method comprises a step of subjecting the surface of a TSV wafer to a polishing treatment with a polishing composition containing an organic alkaline compound, an oxidizing agent selected from sodium chlorite and / or potassium bromate, silicon oxide abrasive particles, and a solvent to simultaneously remove Si and conductive materials at their respective removal rates. By using the method of this invention, Si and conductive materials can be simultaneously polished at higher removal rates to significantly save the necessary working-hour costs for polishing TSV wafers. A polishing composition used in the above method is also provided.

The invention provides a device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal. The device comprises a reflection board arranged at the inner side of the rear wall of a measurement camera obscura, color measurement standard light sources symmetrically installed at the upper side and the lower side of the front end of the measurement camera obscura, a cuvette which is arranged at the front end of the measurement camera obscura and is opposite to the reflection board and a camera located in front of the cuvette, wherein the camera is connected with a corresponding interface of a computer through a data line. The method for simultaneously detecting the potassium bromate and the benzoyl peroxide in the wheat meal comprises the steps that an acetic acid solution, a phosphoric acid solution, a starch-potassium iodide developing solution, a standard solution of the potassium bromate and the benzoyl peroxide, and a solution to be detected are prepared; after the starch-potassium iodide developing solution is added into the standard solution or the solution to be detected of the potassium bromate and the benzoyl peroxide and a color is developed, the solution is added into the cuvette, a transmitted spectrum image of the solution after color development is shot through the camera, chromaticity values R of the solution are read through the computer, the chromaticity values R of the standard solution after color development are used for drawing a standard curve, chromaticity values R of the solution to be detected are compared with the standard curve, and therefore the content of the potassium bromate and the content of the benzoyl peroxide are obtained.

A hydroximated water-soluble polyelectrolyte inverse microemulsion and a preparation process thereof are disclosed, wherein, the emulsion comprises: water phase, oil phase, a hydroximating agent and an inverse agent; the process comprises: formulating sodium hydroxide, pyrosulfite, VA-044 and potassium bromate into solution with deionized water; adding deionized water into a reaction kettle and then sequentially adding acrylamide and acrylic acid; lowering the temperature after dissolution and adding sodium hydroxide solution to control the temperature, adding sodium acetate, sodium formate and diethylene triaminepentaacetic acid pentasodium salt to formulate into the water phase, feeding in high-purity nitrogen to drive away oxygen; adding white oil, span80, Tween81 into a dissolving tank to formulate into the oil phase, feeding in pure nitrogen to drive away oxygen; adding the oil phase into the water phase, adding AIBN and VA-044 after nitrogen is filled up to drive away oxygen, adding sodium pyrosulfite solution for three times with every 40 minutes once in order to control the temperature, then heating up for reaction; heating up once again, adding hydroxylamine hydrochloride for reaction, and dropping the temperature; then adding NP-10 to prepare the target substance for being discharged.

The invention discloses an anti-oxidation cleaning agent for willow products, and relates to the field of daily maintenance products of willow products. The anti-oxidation cleaning agent is prepared from rosin, nanometer silver powder, styrene, tetracosanoic acid, eucalyptus oil, cold cream, potassium bromate, a dye leveller, calixarene, sodium alginate, water, microcrystalline kaolinite, ammonium polyacrylate, anhydrous salt, mercuric chloride, sodium fluoride, heavy calcium carbonate powder and an anti-oxidation aid. The anti-oxidation cleaning agent can daily main the willow products to prevent the aging of the willow products, has a high anti-oxidation effect, can also repair fine scratches while preventing the oxidation of the willow products, and effectively protects the willow products.

A timing method for determining micro-protein content, that is: the Potassium Bromate can oxidize acid Chrome blue K to discolour in the 0.2mol / L vitriol liquor, forms Landolt reaction, the protein produces the sensitive inhibitory effect for the indication reaction and extends the fading time, establishes the determining micro-protein dynamics analysis method according to the above. The longest absorption wavelength is 526 nm (nanometer), the density of the protein with the range of 0-90 mug / 10mL assumes nicer linearity relation.

The invention discloses a synthetic method of 2-Bromo-9-fluorenon and belongs to the technical field of synthesis of organic compounds. The synthetic method of the 2-Bromo-9-fluorenon includes the following steps that firstly, 9-fluorenone and a phase transfer catalyst are mixed with an ammonium bromide aqueous solution and then are heated to 40 DEG C to 95 DEG C, the mixed solution is added to potassium bromate for reaction in batches, and the mole ratio of the 9-fluorenone, the ammonium bromide and the potassium bromate is 1:2-4:1-1.25;secondly, the mixed solution is cooled to the indoor temperature after reaction is completed, bromine removal fluid is added, and then the 2-Bromo-9-fluorenon is obtained through filtering and washing. The synthetic method of the 2-Bromo-9-fluorenon is easy and safe to operate, good in reaction selectivity and high in yield.

The invention belongs to the technical field of organic chemical synthesis, and in particular relates to a preparation method of a rifabutin intermediate. The intermediate is 3-bromo rifamycin S. Themethod includes adding potassium bromate and potassium bromide to water for dissolving, then adding ethyl acetate and rifamycin S, cooling, acidifying, conducting heat preservation reaction, washing,adding a solvent, cooling for crystallization and drying to obtain the 3-bromo rifamycin S. The preparation method has the advantage that raw materials are easy to obtain, the difficulty in transporting and preserving bromine is avoided, the reaction condition is mild, the initiation and the termination are easy, the operation is simple, the yield is high, the product purity is high, and the industrialization is easy.

The invention discloses a preparation method of 2-amino-5-bromopyridine. The preparation method is characterized in that 2-aminopyridine is used as the raw material, and two different bromination agents, namely bromine and N-bromo-succinimide (NBS), are sequentially added; the reaction temperature is strictly controlled, and thus 2-amino-5-bromopyridine can be quickly prepared with high yield andhigh purity; and the preparation method is applicable to industrial production. Additionally, a high-purity by-product, namely succinimide, is separated out in the preparation process and is brominated into high-purity NBS through potassium bromide, potassium bromate and sulfuric acid; and the NBS is applied to the synthesizing of 2-amino-5-bromopyridine in the method and has the same effect as the commercial NBS. According to the method, the quantity of used NBS is decreased, the raw material conversion rate is increased, and the bromination agents are recycled, so that the cost is greatly decreased; the main byproduct is only inorganic salt potassium sulfate; and the synthesizing method is green and environmentally friendly.