31results 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 present invention relates to a process for producing dimethyl ether (DME) and hydrogen (H2) from methane, comprising the steps of: a) providing a gaseous feed stream comprising methane; b) reacting said gaseous feed stream with at least one halogen reactant (X2), under reaction conditions effective to produce an effluent stream comprising methyl halide (MeX), and hydrogen halide (HX); c) separating from the effluent stream obtained in step b): (i) a methyl halide (MeX) stream; and, (ii) a hydrogen halide (HX) stream; d) reacting the methyl halide (MeX) stream separated in step c) with a solid metal oxide (MO(s)) under reaction conditions effective to produce metal halide (MX) and dimethyl ether (DME); and e) decomposing by means of electrolysis said hydrogen halide (HX) stream separated in step c) under conditions effective to produce a gaseous hydrogen (H2) stream and a stream comprising halogen reactant (X2).

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 disclosure provides a process for producing methanol and hydrogen from methane. The process of the disclosure comprises the steps of: • a) providing a gaseous feed stream comprising methane; • b) reacting said gaseous feed stream with at least one halogen reactant, under reaction conditions effective to produce an effluent stream comprising methyl halide, hydrogen halide, optionally polyhalogenated alkanes, and optionally unreacted methane; • c) recovering said an effluent stream, • d) reacting the recovered effluent stream with water and at least one organic base under reaction conditions effective to produce an aqueous solution of hydrogen halide, and a methanol stream comprising methanol (MeOH) and dimethyl ether (DME) and / or optionally unreacted methane, and, e) decomposing by means of electrolysis said aqueous solution of hydrogen halide under conditions effective to produce a gaseous hydrogen stream and a stream comprising halogen reactant.

The present disclosure relates to a novel plant process for purifying hydrogen halide solutions. The process involves halogenating organic compounds, particularly phenolic compounds, in a hydrogen halide solution to precipitate halogenated compounds. The halogenated compounds may be filtrates, and the hydrogen halide solution may be further purified in an adsorbent bed, and the clean hydrogen halide solution may be recycled or used in other processes.

A method of electrolysing hydrogen bromide comprising the steps i) synthesizing sulfuric acid such that hydrogen bromide is produced, ii) providing an electrolytic cell comprising an anode, a cathode, and a membrane sandwiched between the anode and the cathode, iii) feeding a first composition comprising hydrogen bromide and water to the anode, iv) feeding a second composition comprising hydrogen bromide and water to the cathode, and v) operating the electrolytic cell to produce hydrogen at the cathode.

A method of electrolysing hydrogen bromide comprising the steps i) synthesizing sulfuric acid such that hydrogen bromide is produced, ii) providing an electrolytic cell comprising an anode, a cathode, and a membrane sandwiched between the anode and the cathode, iii) feeding a first composition comprising hydrogen bromide and water to the anode, iv) feeding a second composition comprising hydrogen bromide and water to the cathode, and v) operating the electrolytic cell to produce hydrogen at the cathode.

A process for producing hydrogen from feedstocks containing hydrogen and carbon includes contacting a hydrocarbon feedstock with a reactant containing a halogen in a reactor to produce hydrogen, hydrogen halide, and a solid product that includes carbon, regenerating the halogen from the hydrogen halide; and separating the hydrogen as a product.

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 present invention relates to a process for producing dimethyl ether (DME) and hydrogen (H2) from methane, comprising the steps of: a) providing a gaseous feed stream comprising methane; b) reacting said gaseous feed stream with at least one halogen reactant (X2), under reaction conditions effective to produce an effluent stream comprising methyl halide (MeX), and hydrogen halide (HX); c) separating from the effluent stream obtained in step b): (i) a methyl halide (MeX) stream; and, (ii) a hydrogen halide (HX) stream; d) reacting the methyl halide (MeX) stream separated in step c) with a solid metal oxide (MO(s)) under reaction conditions effective to produce metal halide (MX) and dimethyl ether (DME); and e) decomposing by means of electrolysis said hydrogen halide (HX) stream separated in step c) under conditions effective to produce a gaseous hydrogen (H2) stream and a stream comprising halogen reactant (X2).

A method of electrolysing hydrogen bromide comprising the steps i) brominating a hydrocarbon such that hydrogen bromide is produced, ii) providing an electrolytic cell comprising an anode, a cathode, and a membrane sandwiched between the anode and the cathode, iii) feeding a first composition comprising hydrogen bromide and water to the anode, iv) feeding a second composition comprising hydrogen bromide and water to the cathode, and v) operating the electrolytic cell to produce hydrogen at the cathode, wherein the hydrogen bromide fed in step iii) and / or the hydrogen bromide fed in step iv) is hydrogen bromide produced in step i).

A method of electrolysing hydrogen bromide comprising the steps i) brominating a hydrocarbon such that hydrogen bromide is produced, ii) providing an electrolytic cell comprising an anode, a cathode, and a membrane sandwiched between the anode and the cathode, iii) feeding a first composition comprising hydrogen bromide and water to the anode, iv) feeding a second composition comprising hydrogen bromide and water to the cathode, and v) operating the electrolytic cell to produce hydrogen at the cathode, wherein the hydrogen bromide fed in step iii) and / or the hydrogen bromide fed in step iv) is hydrogen bromide produced in step i).

A method of producing hydrogen and / or bromine by electrolysing hydrogen bromide using a fluoropolymer membrane having a glass transition temperature Tg ≥ 110°C in an electrolysis of hydrogen bromide, wherein the hydrogen bromide stems from a bromination of a hydrocarbon.

The invention belongs to the technical field of nonmetal compound reaction, and particularly relates to a hydrogen bromide liquid light component removal purification method which comprises the following steps: S1, hydrogen bromide liquid subjected to bromine removal and water removal is introduced into a light component removal rectifying tower for rectification, and the light component removal rectifying tower adopts a composite filler layer structure; s2, after light component liquid flowing out from the top of the light component removal rectifying tower passes through a condenser, the light component liquid firstly enters a light component liquid receiving tank and then enters a rectifying tail gas thermochemistry integrated recycling and carrier circulating system for pretreatment; the rectification tail gas thermochemical integrated recovery and carrier circulation system subdivides the light component liquid into a high-concentration hydrogen bromide enriched stream and a desorption tail gas stream, wherein the high-concentration hydrogen bromide enriched stream is sent to a high-value recovery path. Through the design of the light component removal rectifying tower with a composite filler structure, the performances of the two fillers are complementary, so that the mass transfer efficiency is synergistically enhanced. The structural design is beneficial for improving the separation precision of light components in hydrogen bromide liquid.

The application provides a purification method of hydrogen bromide by-product containing organic acid, and belongs to the field of purification. The application provides a purification method of hydrogen bromide by-product containing organic acid, which comprises the following steps: mixing the hydrogen bromide by-product containing organic acid and monohydric alcohol, and then performing esterification reaction to obtain a mixture containing organic acid ester; and performing distillation or liquid separation on the mixture containing organic acid ester to obtain organic acid ester and hydrogen bromide. The application utilizes hydrogen bromide as a catalyst, adds monohydric alcohol to react with organic acid to generate organic acid ester which has a large difference in boiling point with hydrogen bromide or has poor compatibility with hydrogen bromide, and then the hydrogen bromide by-product containing organic acid can be purified through simple distillation or liquid separation, thereby improving the utilization rate of the hydrogen bromide by-product containing organic acid, maximizing the utilization of the hydrogen bromide by-product containing organic acid, achieving the goal of green production, and reducing the pollution to the environment. Moreover, the purification method is suitable for industrial production, and improves the production value of enterprises.

A method of producing hydrogen and / or bromine by electrolysing hydrogen bromide using a fluoropolymer membrane having a glass transition temperature Tg≥110° C. in an electrolysis of hydrogen bromide, wherein the hydrogen bromide stems from a bromination of a hydrocarbon.

The invention discloses a treatment method for resource recovery of PTA (pure terephthalic acid) oxidation residues, which is used for treating the PTA oxidation residues, recovering the value of bromine in the PTA oxidation residues and turning waste into wealth, and meanwhile, a mixture containing organic acids such as benzoic acid and phthalic acid is separated and can be incinerated to generate steam and a heat value is recovered; or the separated mixed organic matter containing benzoic acid and phthalic acid is separated into two products including benzoic acid and phthalic acid, and value can also be generated; or the separated mixed organic matter containing benzoic acid and phthalic acid is subjected to esterification reaction to generate ester, and value can also be generated; or the separated mixed organic matters containing benzoic acid and phthalic acid are separated into two products including benzoic acid and phthalic acid, and the two products are respectively subjected to esterification reaction to generate esters, so that values can also be generated.

The application discloses hydrogen bromide gas rectification equipment and a production process thereof, which comprises a sealing end, a pretreatment box, a connecting pipe, a separation cylinder, a shaking assembly and a temperature control assembly. The pretreatment box is provided with a stirring frame for continuously stirring the flowing gas. The top of the pretreatment box is connected with the connecting pipe. One end of the connecting pipe close to the pretreatment box is fixedly connected with the sealing end. The end of the connecting pipe away from the sealing end is connected with the separation cylinder. The top of the separation cylinder is fixedly connected with the shaking assembly. The bottom of the separation cylinder is fixedly connected with the temperature control assembly. The application relates to the technical field of hydrogen bromide production. The hydrogen bromide gas rectification equipment and the production process thereof can avoid the situation that impurities are adhered to the separation plate to block the flowing position. The temperature control assembly can accurately control the temperature inside the equipment, prevents the excessive temperature difference inside the equipment from affecting the rectification of the gas, and the adsorption cylinder can further treat the gas before collection, thereby avoiding the leakage of the gas to the outside world.

The disclosure relates to a novel plant process for purifying hydrogen halide solutions. The process includes halogenating the organic compounds, particularly phenolic compounds, in the hydrogen halide solution to precipitate the halogenated compounds. The halogenated compounds can be filter, the hydrogen halide solution further purified on an adsorbent bed, and the clean hydrogen halide solution can be recycled or used in other processes.

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 belongs to the technical field of fine chemical engineering, 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: introducing hydrogen bromide gas into a primary bromine removal tank filled with a red phosphorus filler layer; s2, preliminary removal of moisture: introducing the gas treated in S1 into a first-stage drying tank filled with liquid phosphorus tribromide; s3, deep removal of trace water: introducing the gas treated in S2 into a secondary drying tank filled with resin or mordenite; and S4, separation of mechanical impurities: introducing the gas treated in S3 into a cyclone separator. By adopting the red phosphorus filler layer and controlling the filling amount, the particle size and the filling density of red phosphorus, free bromine in hydrogen bromide gas can be efficiently removed, liquid phosphorus tribromide is used as a drying medium and supplemented in real time to maintain the mass concentration of phosphorus tribromide, so that the bromine and moisture content in the gas can be effectively reduced, and the quality of the hydrogen bromide gas is improved. And high-quality gas is provided for subsequent deep drying and impurity separation.

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.

The present invention relates to a process for producing methanol (MeOH) and hydrogen (H2) from methane, comprising the steps: a) providing a gaseous feed stream comprising methane; b) reacting said gaseous feed stream with at least one halogen reactant (X2), under reaction conditions effective to produce an effluent stream comprising methyl halide (MeX), hydrogen halide (HX); c) separating from the effluent stream obtained in step b): (i) a methyl halide (MeX) stream, optionally comprising unreacted methane; and, (ii) a hydrogen halide (HX) stream; d) reacting the methyl halide (MeX) stream separated in step c) with a solid metal hydroxide (MOH(s)) under reaction conditions effective to produce metal halide (MX) and methanol (MeOH); and, e) decomposing by means of electrolysis said hydrogen halide (HX) stream separated in step c) under conditions effective to produce a gaseous hydrogen (H2) stream and a stream comprising halogen reactant (X2).

This invention relates to the field of xylene oxidation residue treatment technology, specifically a method for treating xylene and m-xylene oxidation residues, comprising the following steps: S1. Pretreatment; S2. Separation; S3. Evaporation and concentration; S4. Incineration; S5. Ash dissolution; S6. Filtration; S7. Recovery of sodium carbonate and sodium bromide; S8. Bromine recovery and utilization; S9. Recovery of cobalt-manganese catalyst; S10. Precipitate treatment; S11. Recycling of cobalt-manganese catalyst; S12. Recovery and utilization of sodium carbonate. This invention uses an aqueous solution of oxalic acid and sodium carbonate to treat the xylene oxidation residue. The addition of oxalic acid effectively prevents the valence change of cobalt-manganese ions during precipitation under alkaline conditions, thereby reducing the Co content. 3+ Mn 4+ The production of [something], and the addition of oxalic acid will also react with Co. 2+ Mn 2+ The formation of cobalt manganese oxalate precipitate facilitates the recovery of cobalt and manganese catalysts. This invention enables the recovery and recycling of sodium carbonate and cobalt manganese bromine catalysts from residues, with no waste emissions.

The invention 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. Comprising a pretreatment system, a bromide ion extraction device, a regenerant extraction system and a hydrobromic acid extraction system. The bromine ion extraction device adopts ion exchange resin, and bromine in water can be selectively extracted. The regenerant 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. According to the system, anion salt which is high in content and competitive with bromide ions is extracted from water to serve as a transformation agent B, resin is transformed, so that the resin selectively adsorbs the bromide ions in the water, the bromide ions in the water are enriched, the saturated bromide ions are desorbed into desorption liquid through regeneration A, and the water quality is improved. And separating and purifying the regenerant A and bromide ions, or acidifying and purifying to obtain a pure hydrobromic acid solution.

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.

The invention discloses a preparation method and a production device of hydrogen bromide and hydrobromic acid, and the preparation method of hydrogen bromide comprises the following steps: mixing bromine steam and hydrogen for combustion to form a hydrogen bromide crude product; wherein in the mixed combustion process, water vapor is introduced into a combustion system; when the hydrobromic acid is further prepared, the hydrobromic acid can be obtained by absorbing the hydrogen bromide crude product with water; a water vapor feeding pipe can be introduced into the production device, so that water vapor is introduced into a system; according to the method, water vapor, namely water, is introduced in the bromine hydrogen combustion process, so that residual organic matters in recycled bromine can be directly converted into carbon monoxide (CO) and hydrogen after being carbonized by utilizing an in-situ water gas reaction, and the residual organic matters are moved out of a combustion system along with reaction gas; therefore, on the basis of obtaining hydrogen bromide or hydrobromic acid with stable quality, the service life of the production device can be prolonged, the production efficiency is improved, and the defects of existing carbon deposition and carbon deposition cleaning are avoided.

The present invention relates to a process for producing methanol (MeOH) and hydrogen (H2) from methane, comprising the steps: a) providing a gaseous feed stream comprising methane; b) reacting said gaseous feed stream with at least one halogen reactant (X2), under reaction conditions effective to produce an effluent stream comprising methyl halide (MeX), hydrogen halide (HX); c) separating from the effluent stream obtained in step b): (i) a methyl halide (MeX) stream, optionally comprising unreacted methane; and, (ii) a hydrogen halide (HX) stream; d) reacting the methyl halide (MeX) stream separated in step c) with a solid metal hydroxide (MOH(s)) under reaction conditions effective to produce metal halide (MX) and methanol (MeOH); and, e) decomposing by means of electrolysis said hydrogen halide (HX) stream separated in step c) under conditions effective to produce a gaseous hydrogen (H2) stream and a stream comprising halogen reactant (X2).

The present invention relates to a process for converting carbon dioxide into carbon monoxide using in situ generated carbon comprising the step of reacting a starting composition containing carbon dioxide and dibromomethane in a reactor at a temperature of 900 to 2,000°C so as to produce a carbon monoxide and hydrogen bromide containing gaseous reaction mixture.

A method of producing hydrogen and / or bromine by electrolysing hydrogen bromide using a fluoropolymer membrane having a glass transition temperature Tg ≥ 110°C in an electrolysis of hydrogen bromide, wherein the hydrogen bromide stems from a sulfuric acid synthesis.