13 results about "Sodium bromate" patented technology

The invention discloses a high-temperature-resistant and salt-resistant fracturing fluid and a preparation method thereof, and relates to the technical field of oil field fracturing fluids. When the high-temperature-resistant and salt-resistant fracturing fluid is prepared, sodium 3-chloro-2-hydroxypropane sulfonate, N, N-dimethylacrylamide and ethylene glycol react to prepare a quaternized solid product, and then the quaternized solid product reacts with 1-bromooctadecane to prepare an amphoteric hydrophobic monomer; guar gum powder reacts with 3-(1-naphthyloxy)-1, 2-epoxypropane to prepare naphthyloxy functionalized guar gum, and then the naphthyloxy functionalized guar gum, acrylamide and an amphoteric hydrophobic monomer are subjected to initiated polymerization through ceric ammonium nitrate to prepare modified guar gum; enabling zirconium oxychloride octahydrate, titanium chloride, lactic acid, ethanediamine and glycerol to react to prepare an organic zirconium cross-linking agent; and finally, mixing the modified guar gum, an organic zirconium cross-linking agent, sodium thiosulfate, sodium bromate, a surfactant and water to prepare the high-temperature-resistant and salt-resistant fracturing fluid. The high-temperature-resistant and salt-resistant fracturing fluid prepared by the invention has excellent high-temperature resistance and salt resistance.

The invention discloses an electroplating disqualified cadmium layer stripping solution, a preparation method and a use method, and the electroplating disqualified cadmium layer stripping solution comprises 6-8 parts of sodium phytate, 1-3 parts of sodium nitrilotriacetate, 2-4 parts of borate, 5-10 parts of sodium bromate, 1-2 parts of sodium alkyl naphthalene sulfonate, 1-2 parts of glucoside, 5-8 parts of sodium nitrate, 3-5 parts of ammonia water, 2-4 parts of triol ethylamine, 4-6 parts of 1-hydroxyethylidene-1, 1-diphosphonic acid and 8-12 parts of ammonium persulfate. The total amount of the purified water is 100 parts, and the total amount of the purified water is 100 parts. The pH value of the deplating agent solution is alkaline, the problem of hydrogen evolution of a hydrogen sensitive material is solved, the risk of hydrogen embrittlement is avoided, and hydrogen removal is not needed after steel and iron materials are deplated; cadmium ion heavy metal pollution and sewage treatment difficulty exist, the stripped cadmium ions automatically generate precipitates, recycling is facilitated, and the sewage treatment difficulty is reduced; the metal deplating liquid is convenient to use and simple to operate, only unqualified products need to be put into the deplating liquid in a room-temperature environment, after a certain time, after a plating layer is completely removed, the unqualified products are washed with water, and a metal base material is not damaged.

The invention provides a beta-cyclodextrin coagulant aid as well as a preparation method and application thereof, and belongs to the technical field of environment and chemistry. The preparation method of the beta-cyclodextrin coagulant aid comprises the following steps: adding beta-cyclodextrin and acrylic acid into a first solvent for esterification reaction to obtain a first polymer; adding the first polymer and dimethyl diallyl ammonium chloride into a second solvent, and adding an initiator for polymerization reaction to obtain a second polymer; and adding the second polymer, sodium trifluoromethanesulfinate and sodium bromate into a third solvent, and carrying out nucleophilic substitution reaction to obtain the beta-cyclodextrin coagulant aid.

The present invention provides a method for preparing bromobenzene-d5, comprising: in parts by mass, mixing 1 part of deuterated benzene, 0.61-1.08 parts of sodium bromide, 0.62-0.89 parts of sodium bromate, 0.007-0.07 parts of iron bromide, and 1.07-2.14 parts of water, and adding 2.8-7 parts of a sulfuric acid aqueous solution having a volume fraction of 20-25% for a reaction at a reaction temperature of 20-60°C for a reaction time of 12-48 h to obtain an initial product containing bromobenzene-d5; and purifying the initial product to obtain bromobenzene-d5. The present invention provides a safe method for preparing bromobenzene-d5. The method has a high yield and a maintained degree of deuteration and is suitable for industrial mass production.

The invention relates to the field of preparation of drug intermediates, and particularly discloses a method for preparing 10, 11-dibromo iminodibenzyl based on iminodibenzyl as a raw material, which comprises the following steps: adding a free radical catalyst and the raw material iminodibenzyl into a mixed solvent, adding a phase transfer catalyst, then dropwise adding sodium bromate, then synchronously dropwise adding bromine, and reacting to generate 10, 11-dibromo iminodibenzyl. The 10, 11-dibromo imino dibenzyl crude solution is subjected to post-treatment, separation and purification, and a 10, 11-dibromo imino dibenzyl refined product is prepared; wherein the mixed solvent is selected from a mixture of water, hydrogen peroxide, toluene and cyclohexane, the free radical catalyst is an iron-based composite catalyst loaded with organic peroxide and lithium bromide, the invention provides a brand-new method for synthesizing and preparing 10, 11-dibromo imino dibenzyl, and the yield and the purity of 10, 11-dibromo imino dibenzyl are higher.

The utility model belongs to the technical field of sodium bromate production, and particularly relates to an impurity adsorption filtering device in a sodium bromate production process, which comprises a filtering box, conveying supercharging devices mounted on the left side, the right side and the front side of the filtering box, a mixing device mounted at the left end in the filtering box, and a filtering adsorption device mounted at the right end in the filtering box, the mixing device comprises a stirring structure and a heating structure, the heating structure is mounted inside and at the top end of the stirring structure, the stirring structure comprises an asynchronous motor, the output end of the asynchronous motor is connected with a transmission part, a stirring shaft is mounted inside the transmission part, a stirring rod is mounted in the middle of the outer surface of the stirring shaft, and a scraper is mounted at the bottom end of the stirring shaft. According to the impurity adsorption and filtration device in the production process of sodium bromate, through the arrangement of the mixing device, the asynchronous motor is started to drive the transmission part and the stirring shaft for transmission, and the stirring rod, the scraper and the heating pipe are used for heating and stirring, so that further dissolution of unfused raw material particles is facilitated.

This invention provides a method for preparing androstane-3,6,17-trione (E,Z)-3-[O-(2-aminoethyl)]oxime hydrochloride, comprising the following steps: benzophenone oxime reacts with 2-chloroethylamine hydrochloride in dimethyl sulfoxide, followed by acid-base adjustment, toluene extraction, hydrolysis with concentrated hydrochloric acid to remove the protecting group, and crystallization to obtain high-purity 2-aminoethylamine hydrochloride; androstane-3,6,17-triol is used as a raw material and oxidized under the catalysis of sodium bromate and ruthenium oxide (IV), quenched, separated, washed with water, and crystallized by solvent replacement with isopropanol to obtain androstane-3,6,17-trione; the 2-aminoethylamine hydrochloride solution is mixed and reacted with the trione in tetrahydrofuran solution at low temperature, followed by salting out, filtration, separation, washing with saturated brine and drying with magnesium sulfate, and purification by solvent replacement, water dissolution and concentration, and cooling crystallization to obtain the high-purity target product. This invention significantly improves the yield of the target product by optimizing reaction conditions, while achieving readily available raw materials, low cost, and industrialized production through traditional chemical reaction pathways.

The application discloses a high-temperature-resistant and salt-resistant fracturing fluid and a preparation method thereof, and relates to the technical field of oilfield fracturing fluids. In the preparation of the high-temperature-resistant and salt-resistant fracturing fluid, 3-chloro-2-hydroxypropane sulfonic acid sodium, N,N-dimethyl acrylamide and ethylene glycol are reacted to obtain a quaternary ammonium solid product, and the quaternary ammonium solid product is reacted with 1-bromooctadecane to obtain an amphoteric hydrophobic monomer; guar gum powder is reacted with 3-(1-naphthoxy)-1,2-epoxypropane to obtain naphthoxy functionalized guar gum, and then the naphthoxy functionalized guar gum is polymerized with acrylamide and the amphoteric hydrophobic monomer by using ammonium cerium nitrate as an initiator to obtain modified guar gum; zirconium oxychloride octahydrate, titanium chloride, lactic acid, ethylenediamine and glycerol are reacted to obtain an organic zirconium crosslinking agent; and finally, the modified guar gum, the organic zirconium crosslinking agent, sodium thiosulfate, sodium bromate, a surfactant and water are mixed to obtain the high-temperature-resistant and salt-resistant fracturing fluid. The high-temperature-resistant and salt-resistant fracturing fluid prepared by the application has excellent high-temperature resistance and salt resistance.

The invention discloses a continuous synthesis method of p-nitrobenzyl bromide, which comprises the following steps: introducing a p-nitrotoluene solution, an acid aqueous solution of sodium bromate and a bromine solution into a micro-channel reactor to react under photocatalysis to obtain a p-nitrobenzyl bromide reaction solution, and then performing post-treatment to obtain p-nitrobenzyl bromide. The continuous synthesis method uses a fluid process, is small in amplification effect, high in production efficiency, green and environment-friendly, improves the selectivity of bromine, and also improves the utilization rate of bromine atoms.

The utility model belongs to the technical field of mixing tank, concretely is a kind of mixing tank capable of preventing waste residue, including mixing tank body, controller, filling port, discharge port, driving motor and mixing roller, the surface of mixing tank body is equipped with controller, and the top of mixing tank body is provided with the filling port of symmetrical distribution. When installing the utility model, install the filter frame along the filling port, the installation frame will extrude the pressing rod when moving, after installation is completed, the locking rod can lock the installation frame by the reset of limiting spring, the filter frame can filter sodium bromate raw materials, avoid waste residue in the interior of mixing tank, by starting starting motor, the rotating rod connected to output end is rotated by bevel gear set driving threaded rod, so as to drive the collection frame to move by limiting seat, and then sodium bromate finished product dripping can be collected.

The utility model belongs to the technical field of chemical equipment, and particularly relates to a double-cone drying device for sodium bromate production, which comprises a support frame, a base, a hollow shaft, a driving component, a double-cone drying cylinder, a shell, a stirring component, a transmission component and a vacuum pump. The base is fixedly installed on the bottom side of the supporting frame, the hollow shaft is rotatably installed on the inner wall of one side of the supporting frame, the double-cone drying cylinder is fixedly installed on the hollow shaft, the shell is fixedly installed in the double-cone drying cylinder, the turning and stirring assembly is arranged on the shell, and the transmission assembly is arranged on the supporting frame and the shell and penetrates through the hollow shaft. The transmission assembly is connected with the stirring assembly, and the driving assembly is arranged in the supporting frame and connected with the hollow shaft. The double-cone drying device for sodium bromate production is reasonable in design, easy and convenient to operate, high in production efficiency, good in drying uniformity, high in safety, stable and reliable, and high in practical value and popularization prospect.

This invention discloses a highly safe ammonium nitrogen 15N The detection method relates to the field of stable isotope analysis technology. This method enriches ammonium nitrogen in the sample using a cation exchange resin, followed by dialysis desalting, and then... Fe3O4‑CeO2 Core-shell structured nanozymes catalyze sodium hypobromite NH4+ Quantitative oxidation to NO2‑ Subsequently, in an intelligent anaerobic microbial reactor, immobilized Pseudomonas bacteria with embedded dual-sensitive probes were used to... NO2‑ Targeted conversion N2O The reactor monitors and automatically adjusts the pH and microbial electron transfer activity inside the microspheres in real time to produce gas; N2O After purification and low-temperature enrichment of MOF materials, the samples were analyzed using an isotope ratio mass spectrometer. 15N Abundance. This method avoids the use of highly toxic substances, is highly safe, selective, and sensitive, and is suitable for detecting ammonium nitrogen in environmental samples. 15N Accurate detection.

The invention discloses a kind of clean synthesis method and device of dibromohydantoin, relate to the field of chemical synthesis technology, in the clean synthesis method preparation process of dibromohydantoin provided by the present invention, using half bromine+electrolysis, 5,5-dimethylhydantoin, sodium bromide and water are added in reactor according to a certain ratio, energized electrolysis, after electrolysis 1~2h, slowly drip about a certain amount of bromine, electrolysis sodium bromide solution generates sodium hypobromite, 5,5-dimethylhydantoin and bromine and sodium hypobromite, finally generate 1,3-dibromo-5,5-dimethylhydantoin.The bromine on 1,3-dibromo-5,5-dimethylhydantoin molecules generated, all come from bromine, and bromine is almost not consumed in the sodium bromide added, and the reaction is completed, and in the mother liquor after centrifugal drying, main substance is still sodium bromide, and mother liquor can be reused, does not produce wastewater, and is green and environmentally friendly.The problem that traditional dibromohydantoin preparation method cost is too high existing in prior art is solved.