101results about "Hydrogen bromide" patented technology

Apparatus and methods for augmenting the Mark 13a process of Van Zelzen et al., by providing for the addition of dispatchable energy storage and/or additional waste stream treatments. Sulfur-containing stack gas emissions from the burning of fossil fuels for electricity production are cleaned, removing the sulfur by use of the Bunsen reaction. The process produces hydrogen and sulfuric acid as byproducts. The hydrogen output of the process can be used to co-produce electricity in a reversible fuel cell, and optionally can be stored so that electricity can be produced during periods of high demand. Optionally the hydrogen can be reacted with air-nitrogen or nitrogen from the combustion gasses to produce ammonia. The sulfuric acid can optionally be reacted with iron or aluminum to produce iron or aluminum sulphates and additional electricity. In addition, mercury removal from the gas emissions from burning fossil fuels (primarily coal) can be performed.

A process for converting gaseous alkanes to olefins and liquid hydrocarbons wherein a gaseous feed containing alkanes is reacted with a dry bromine vapor to form alkyl bromides and hydrobromic acid vapor. The mixture of alkyl bromides and hydrobromic acid are then reacted over a synthetic crystalline alumino-silicate catalyst, such as an X or Y type zeolite, at a temperature of from about 250° C. to about 500° C. so as to form olefins, higher molecular weight hydrocarbons and hydrobromic acid vapor. Various methods are disclosed to remove the hydrobromic acid vapor from the higher molecular weight hydrocarbons and to generate bromine from the hydrobromic acid for use in the process.

A process for converting gaseous alkanes to olefins, higher molecular weight hydrocarbons or mixtures thereof wherein a gaseous feed containing alkanes is thermally reacted with a dry bromine vapor to form alkyl bromides and hydrogen bromide. Poly-brominated alkanes present in the alkyl bromides are further reacted with methane over a suitable catalyst to form mono-brominated species. The mixture of alkyl bromides and hydrogen bromide is then reacted over a suitable catalyst at a temperature sufficient to form olefins, higher molecular weight hydrocarbons or mixtures thereof and hydrogen bromide. Various methods are disclosed to remove the hydrogen bromide from the higher molecular weight hydrocarbons, to generate bromine from the hydrogen bromide for use in the process, and to selectively form mono-brominated alkanes in the bromination step.

A method comprising: providing a halogen stream; providing an alkane stream; providing a decoking agent; and reacting at least a portion of the halogen stream with at least a portion of the alkane stream in the presence of a halogenation catalyst and the decoking agent to form a halogenated stream.

A method comprising: providing an alkyl halide stream; contacting at least some of the alkyl halides with a coupling catalyst to form a product stream comprising higher hydrocarbons and hydrogen halide; contacting the product stream with a solid reactant to remove at least a portion of the hydrogen halide from the product stream; and reacting the solid reactant with a source of oxygen to generate a corresponding halogen.

A process for converting gaseous alkanes to olefins, higher molecular weight hydrocarbons or mixtures thereof wherein a gaseous feed containing alkanes is reacted with a dry bromine vapor to form alkyl bromides and hydrobromic acid vapor. The mixture of alkyl bromides and hydrobromic acid is then reacted over a suitable catalyst at a temperature sufficient to form olefins, higher molecular weight hydrocarbons or mixtures thereof and hydrobromic acid vapor. Various methods are disclosed to remove the hydrobromic acid vapor from the higher molecular weight hydrocarbons, to generate bromine from the hydrobromic acid for use in the process, and to selectively form monobrominated alkanes in the bromination step.

Provided are a novel system and method for delivery of a vapor phase product to a point of use, as well as a novel on-site chemical distribution system and method. The system for delivery of a vapor phase product includes a storage vessel containing a liquid chemical under its own vapor pressure, a column connected to receive the chemical in liquified state from the storage vessel, wherein the chemical is fractionated into a contaminated liquid heavy fraction and a purified light vapor fraction and a conduit connected to the column for removing the purified light vapor fraction therefrom. The system is connected to the point of use for introducing the purified vapor fraction thereto. Particular applicability is found in semiconductor manufacturing in the delivery of electronic specialty gases to one or more semiconductor processing tools.

An integrated process for producing aromatic hydrocarbons and ethylene and/or propylene and optionally other lower olefins from low molecular weight hydrocarbons, preferably methane, which comprises: (a) contacting one or more low molecular weight alkanes, preferably methane, with a halogen, preferably bromine, under process conditions sufficient to produce a monohaloalkane, preferably monobromomethane, (b) reacting a first portion of the monohaloalkane in the presence of a coupling catalyst under process conditions sufficient to produce aromatic hydrocarbons and C_2-5 alkanes, (c) separating the aromatic hydrocarbons from the product mixture of step (b) to produce aromatic hydrocarbons, (d) reacting a second portion of the monohaloalkane in the presence of a coupling catalyst under process conditions sufficient to produce ethylene and/or propylene.

A process for converting gaseous alkanes to olefins, higher molecular weight hydrocarbons or mixtures thereof wherein a gaseous feed containing alkanes may be thermally or catalytically reacted with a dry bromine vapor to form alkyl bromides and hydrogen bromide. Poly-brominated alkanes present in the alkyl bromides may be further reacted with methane over a suitable catalyst to form mono-brominated species. The mixture of alkyl bromides and hydrogen bromide may then be reacted over a suitable catalyst at a temperature sufficient to form olefins, higher molecular weight hydrocarbons or mixtures thereof and hydrogen bromide. Various methods and reactions are disclosed to remove the hydrogen bromide from the higher molecular weight hydrocarbons, to generate bromine from the hydrogen bromide for use in the process, to store and subsequently release bromine for use in the process, and to selectively form mono-brominated alkanes in the bromination step. One or more of the reactions of the processes of the present invention may be conducted in a microchannel reactor.

A process, composition and apparatus for the removal of impurities from corrosive gases, particularly halogen-containing gases, down to about 100 ppb concentration are described. The critical component is zirconia (ZrO₂), which in a variety of physical forms is capable of dehydrating such gases. The zirconia can be in the form of a coating on a substrate, as a granular bulk material, or deposited within the pores of a porous body. The zirconia is retained in a simple container which is easily installed in a gas supply line, such as to a gas- or vapor-deposition manufacturing unit. The purification process can be operated for long periods of time in the presence of these gases. The invention provides final purification to gas streams intended for gas- or vapor-deposition formation of high purity electronic, prosthetic or similar products, and can be used in combination with a preliminary dehydration process or a solid particulate removal unit upstream.

The invention relates to a treatment process for a mother liquor extraction liquid of a purified terephthalic acid oxidation unit, and belongs to the field of industrial wastewater treatment. The process comprises the steps that the oxidized mother liquor extraction liquid is treated by an acetic acid recovery unit or a terephthalic acid partial recovery unit and a temperature-reducing solid-liquid separation unit. A separation liquid passes through an impurity removal unit, a resin cobalt and manganese adsorption unit for recovering cobalt and manganese and a bromine removal unit for recovering bromine, and finally, waste liquid is directly discharged to a comprehensive sewage treatment unit; solids are washed with water at first, a water washing liquid is conveyed to the resin cobalt andmanganese adsorption unit to recover the cobalt and manganese, and the remaining solids are recovered and extracted and purify terephthalic acid and benzoic acid, and economic value is generated. Theconcentration of bromine, benzoic acid, phthalic acid and other benzene-series compounds in the oxidized mother liquor extraction liquid is reduced, the adverse effects on the activity of biochemicalsludge are avoided, the difficulty of treating wastewater is reduced, and the efficiency of later comprehensive sewage treatment is improved; the consumption quantity of alkaline substances is reduced, the resources are saved, the enterprise cost is reduced, and the utilization rate is increased.

The invention discloses a preparation method of electronic grade hydrogen bromide, and the method comprises the following steps: firstly, bromine is gasified by a preheater, and mixed with hydrogen toenter a reactor for catalytic combustion reaction to generate hydrogen bromide; reaction products are extracted from the top of the reactor and then enter the preheater to exchange heat with the bromine and then enter a reboiler to exchange heat with materials in the bottom of a light removal tower; and the heat-exchanged reaction products enter the light removal tower after being cooled by a cooler. The gas phase extracted from the top of the light removal tower enters the reboiler to exchange heat with the materials in the bottom of a heavy removal tower, and enters a condenser to be condensed and cooled, the liquid phase returns to the light removal tower to be extracted as light component impurities; crude hydrogen bromide extracted from the side line of the light removal tower entersthe heavy removal tower, and heavy impurities are extracted from the tower bottom; a 6N electronic grade hydrogen bromide product is extracted from the top of the heavy removal tower, and heavy components are extracted from the tower bottom. According to the invention, heat generated by the reaction and a double-effect rectification process are fully utilized, no external heat source is needed, and liquid nitrogen can be saved by more than 45 percent; the bromine and hydrogen are selected as reaction raw materials, the reaction product has less impurities and high bromine selectivity, and canbe 100% converted into hydrogen bromide.

The invention discloses a purifying method for hydrogen bromide. The method comprises the following steps: performing partial vaporization on the hydrogen bromide; allowing the vaporized hydrogen bromide to enter a Nafion dryer to deeply remove water in the hydrogen bromide; allowing hydrogen bromide gas without the water to enter a light-component removing rectification tower; allowing hydrogen bromide without light components to enter a heavy-component removing rectification tower to remove heavy components in the hydrogen bromide; and discharging hydrogen bromide without the heavy components from the top of the heavy-component removing rectification tower, and allowing the discharged hydrogen bromide to enter a hydrogen bromide storage unit to obtain an electronic-grade hydrogen bromideproduct. According to the method provided by the invention, a novel desiccant is used, and when the water in the hydrogen bromide is simply and efficiently removed, processing equipment of 316L instead of precious materials such as nickel-based alloy is used, so that the equipment investment is greatly reduced.