6results about "Hydrogen bromide" patented technology

The application discloses a high-purity electronic-grade hydrogen bromide metal ion impurity control device and a control method. The device comprises an adsorption column, a bag-type dust collector and a rectifying tower. First impurity removal mechanisms are arranged at the upper end of the adsorption column and the top of the rectifying tower to remove gas-phase metal impurities. Second impurity removal mechanisms are arranged at the tower kettle of the rectifying tower to remove liquid-phase metal impurities. The bag-type dust collector comprises a flow channel, a keel frame and dust removal bags. Third impurity removal mechanisms are arranged on the flow channel. The dust collector device of metal ions is added to the existing process system, and the structure is designed to realize solid-liquid separation of liquid to intercept metal particles. The structures of the adsorption equipment and the rectifying equipment are designed to remove gas-phase metal impurities and liquid-phase metal impurities, thereby increasing the removal efficiency and effect of metal particles.

The application belongs to the technical field of fine chemical industry, and particularly relates to a hydrogen bromide purification method for removing bromine, water and impurities before liquefaction, which comprises the following steps: S1, removal of free bromine: hydrogen bromide gas is introduced into a first bromine removal tank filled with a red phosphorus filler layer; S2, preliminary removal of water: the gas treated in S1 is introduced into a first drying tank filled with liquid phosphorus tribromide; S3, deep removal of trace water: the gas treated in S2 is introduced into a second drying tank filled with resin or mordenite; and S4, separation of mechanical impurities: the gas treated in S3 is introduced into a cyclone separator. By adopting the red phosphorus filler layer and controlling the loading amount, particle size and loading density of the red phosphorus, the free bromine in the hydrogen bromide gas can be efficiently removed, liquid phosphorus tribromide is used as a drying medium and is supplemented in real time to maintain the mass concentration of the phosphorus tribromide, so that the bromine and water content in the gas can be effectively reduced, and high-quality gas is provided for subsequent deep drying and impurity separation.

The application discloses a system for extracting hydrobromic acid from bromine-containing wastewater and a treatment method thereof, and belongs to the field of industrial wastewater treatment. The system comprises a pretreatment system, a bromide ion extraction device, a transformation agent extraction system and a hydrobromic acid extraction system. The bromide ion extraction device adopts ion exchange resin and can selectively extract bromine in water. The transformation agent extraction system comprises an organic matter removal device, a divalent cation removal device and a concentration device. The hydrobromic acid extraction system comprises a bromine separation device and a distillation device. The system extracts an anion salt with a large content and competitive with bromide ions in water as a transformation agent B, transforms the resin, selectively adsorbs the bromide ions in water by the resin, enriches the bromide ions in water, desorbs the saturated bromide ions in the adsorption to a desorption liquid by regeneration A, and then separates and purifies the regeneration agent A and the bromide ions, or acidifies and purifies to obtain a pure hydrobromic acid solution.

The invention relates to the technical field of electronic gas purification, in particular to a method for drying hydrogen bromide by siloxane modified polydivinylbenzene. The preparation method comprises the following steps: carrying out precipitation polymerization on divinyl benzene and bis (methylacryloyloxy) propyl tetramethyl disiloxane to obtain siloxane modified polydivinyl benzene, reacting the siloxane modified polydivinyl benzene with dry hydrogen bromide gas to obtain silicon-bromine bond modified polydivinyl benzene, and carrying out hydrolysis reaction to reduce the moisture content in the hydrogen bromide gas. The siloxane modified polydivinylbenzene is stable in property, and is environment-friendly in the processes of preparation, transfer and use of the siloxane modified polydivinylbenzene as a water removal material, impurities are not introduced, and the water removal effect is good.

The invention relates to the technical field of industrial wastewater treatment and resource recycling, in particular to a process for recycling hydrobromic acid and potassium sulfate and re-purifying by utilizing diafenthiuron potassium bromide-containing wastewater, which comprises the following steps: firstly, adjusting the pH value to 2.0-4.0, and carrying out reduced pressure distillation to obtain a potassium bromide concentrated solution; performing multi-stage counter-current extraction and impurity removal by using a specific composite extracting agent, and adding sulfuric acid to react to generate hydrobromic acid and potassium sulfate; adding an entrainer, distilling and rectifying to obtain more than or equal to 48% of hydrobromic acid, and crystallizing and centrifuging residual liquid to obtain more than or equal to 99% of potassium sulfate; after the terminal wastewater is treated, the COD (Chemical Oxygen Demand) removal rate is greater than or equal to 90 percent. The diafenthiuron potassium bromide-containing wastewater is treated under the conditions of precise temperature control, extraction and the like, so that more than or equal to 48% of hydrobromic acid and more than or equal to 99% of potassium sulfate are obtained, and bromine and potassium are recycled; through composite extraction and other treatments, the COD removal rate of the wastewater is greater than or equal to 90%, solvent closed-loop circulation, recycled solvent reuse and low-concentration hydrobromic acid fraction reflux are also constructed, the cost is reduced, the raw material utilization rate is improved, and the requirements of green chemical industry are met.

A process of hydrogen production comprising the following steps: i) providing an electrolysis unit (51) comprising one or more electrolytic cells (53) each comprising an anode (59), a cathode (55), and an ion-exchange membrane (57); ii) providing an anolyte (43) comprising hydrogen bromide at a concentration ranging from 0.5 to 12.5 M; and a catholyte (61); the catholyte comprising an aqueous solution of one or more strong acids selected from hydrochloric acid, nitric acid, sulfuric acid, perchloric acid, hydroiodic acid or any mixtures thereof, at a pH of at most 1.0; iii) performing an electrolysis to convert at least a part of the hydrogen bromide of the hydrogen bromide aqueous solution into bromine by operating the one or more electrolytic cells (53); and iv) recovering a liquid effluent (49) comprising bromine from the anode side and a gaseous effluent (47) comprising hydrogen at the cathode side.