30 results about "Brominated hydrocarbon" patented technology

The invention discloses a catalyst which is used when methane is transformed into hydrobromic ether through the bromine oxidation reaction, and the catalyst which is used when preparing heavy hydrocarbons by using the hydrobromic ether further, and belongs to the technology field of the catalyst and the preparation method thereof. The first type of catalyst which is used when the methane is transformed into the hydrobromic ether through the bromine oxidation reaction comprises the preparation step that water-soluble metallic compound precursors such as Rh, Ru, Cu, Zn, Ag, Ce, V, W, Cd, Mo, Mn, Cr, La, etc. are mixed with a silica precursor, the mixture is processed through hydrolyzation, drying and roasting, and then the catalyst is obtained; the first type of catalyst can lead definite masses of reactant composed of the methane, HBr, H2O and oxygen sources (that is O2, air or oxygen-enriched air) to perform the catalytic bromine oxidation reaction, to generate target products such as CH3Br, CH2Br2, etc. The second type of catalyst, which is used when preparing the heavy hydrocarbons by using the hydrobromic ether further, includes the preparation step that molecular sieves such as HZSM-5, HY, H Beta, 3A, 4A, 5A, 13X, etc. load metallic compounds composed of Zn and Mg, so that the catalyst is obtained; the second type of catalyst can lead the methane bromination products composed of the CH3Br and the CH2Br2 to further react so as to generate the heavy hydrocarbons containing C3 to C13 and HBr, wherein, the HBr is used as a circular reaction medium.

A fire retardant material is described that includes a polyamide and a brominated hydrocarbon. The brominated hydrocarbon makes up between about two percent and about 25 percent of the fire retardant material.

The invention relates to a monolithic ruthenium catalyst for purifying PTA oxidation tail gas, a preparation method and application thereof. The catalyst is mainly obtained by forming a powder catalyst, the powder catalyst includes an active component, a first carrier and a second carrier, the active component is ruthenium and / or ruthenium oxide, the first carrier is rutile phase TiO2, The second carrier is any one of ZrO2, Al2O3, SiO2 or ZnO, and the mass percentage of ruthenium in the active component in the powder catalyst is ≤2wt% based on the mass of the powder catalyst as 100 wt%. The catalyst has high activity, stable catalytic performance for brominated hydrocarbons, and no high-brominated by-products are formed. For common components in PTA tail gas, the complete oxidation temperature of the catalyst is 170-230 °C, and the selectivity of the final product CO2 is ≥99. %, can be widely used in catalytic oxidation of industrial organic waste gas such as PTA oxidation tail gas.

The present invention discloses a method for preparing correspondent carbonic ester by means of one-step reaction of alcohol and halohydrocarbon in the presence of catalyst. Said invention uses carbonate as catalyst, uses organic alkali as adjuvant and utilizes alcohol, carbon dioxide and halohydrocarbon to prepare carbonic ester by means of one-step reaction.

The invention discloses alkyl-substituted disilane expressed as Rn Si-Si(CH3)6-n (I) in a formula (I) and a preparation method thereof. The preparation method of the compound comprises: adding magnesium powder, diethyl ether and iodine in a reactor, dropwise adding a diethyl ether solution of brominated hydrocarbon into the reactor for initiation, dropwise adding the residual diethyl ether solution of brominated hydrocarbon into the reactor, and reacting for 2-3hours after the dropwise adding operation to prepare a Grignard reagent; putting the reaction system in ice water bath, dropwise adding a diethyl ether solution of chlorosilane liquid waste with high boiling point into the Grignard reagent, heating up to room temperature to react for 1.5-2hours after the dropwise adding operation, and heating up to 50-60 DEG C to react for 5-6hours; adding water to separate an organic phase from an aqueous phase, extracting the aqueous phase through petroleum ether, mixing the organic phase, drying, concentrating, performing silicagel column chromatography, and concentrating the leacheate to obtain the remaining material which is the product (alkyl-substituted disilane). Industrial waste is used as a raw material in the invention, and the product has good thermal stability and strong heat resistance, thereby being applied to hydraulic oil, diffusion pump oil and heat transfer oil.

A novel amino acid ester derivative cationic chiral ionic liquid and a preparation method thereof. The general formula of the amino acid ester derivative cationic chiral ionic liquid is A+X-, wherein A+ is an amino acid ester cationic derivative, and X-is BF4-, PF6-, HSO4-. The preparation method is: react amino acid with methanol and thionyl chloride at low temperature to obtain amino acid ester hydrochloride; react amino acid ester hydrochloride with paraformaldehyde and acetone through Mannich reaction to obtain amino acid ester derivative Mannich base Amino acid ester derivative Mannich base reacts with brominated hydrocarbon to obtain bromide salt chiral ionic liquid of amino acid ester derivative; amino acid ester derivative is obtained by exchanging the bromide ion of the bromide salt chiral ionic liquid of amino acid ester derivative Cationic chiral ionic liquid. The invention has many advantages such as high selectivity of chiral substances, non-volatile, non-toxic, non-polluting ionic liquid, and is suitable for large-scale production in the fine chemical industry.

The invention discloses a method for preparing a light-induced solar self-cleaning coating. Adding a vinyl silane coupling agent and ammonia water to water, stirring sufficiently to form a uniform liquid; coating the liquid on the surface of a tempered glass plate of a solar cell, Dry in the dark at room temperature; evenly coat the brominated hydrocarbon on the surface of the toughened glass plate of the above solar cell; irradiate under the light source for a certain period of time, the brominated hydrocarbon combines with the vinyl silane coupling agent through free radical addition reaction to form Hydrophobic self-cleaning coating; use ethyl acetate to wash off the unreacted small molecule organics on the surface to complete the construction of the self-cleaning coating. The invention fully utilizes the advantages of the in-situ polymerization reaction, saves raw materials and reduces the cost; the property of the hydrophobic coating on the surface of the solar battery can be conveniently adjusted by using different halogenated alkanes.

The invention discloses a method for synthesizing alpha-bromoketone and coproducing bromohydrocarbon. The technical scheme comprises the following steps of: adding arylalkyl ketone compounds, alcohol or epoxy compounds and water into a flask first; dripping bromine into the flask slowly under the conditions of stirring and heating; performing a bromo-reaction on the bromine and the ketone compounds to obtain alpha-bromoketone and bromine hydride; dissolving the bromine hydride in the water to form hydrobromic acid; performing a reaction on the hydrobromic acid and the alcohol or epoxy compounds to obtain bromohydrocarbon ketone compounds; after the reaction is completed, performing steam distillation to obtain a raffinate serving as an alpha-bromoketone crude product after distillation; cooling for separating crystals out; washing and drying the crystals to obtain an alpha-bromoarylalkyl ketone product; separating an aqueous layer from a distillate serving as a bromohydrocarbon crude product; washing an organic layer until the organic layer is neutral; drying by using anhydrous calcium chloride; and distilling to obtain a bromohydrocarbon product. In the method, the water is takenas a solvent, and the bromohydrocarbon is coproduced while the alpha-bromoketone compounds are synthesized; and the gross products of the reaction are the alpha-bromoketone, the bromohydrocarbon and the water, so the method has the characteristics that: the high atom utilization rate of the reaction is high, the generation or the discharging of noxious substances such as bromine hydride gas, strong acid waste water and the like is avoided, and the effects of environmental protection, energy conservation and reduction emission are achieved.

The invention discloses a preparation method and application of a bromo-hydrocarbon anaerobic degrading bacterial agent. The preparation method comprises the following steps: adding an inorganic salt medium in an anaerobic bottle, removing dissolved oxygen in the medium by utilizing a nitrogen evaporator, after high-temperature and high-pressure sterilization of the medium, adding anaerobic sludge from urban sewage treatment plants in an anaerobic cultural incubator, sealing the anaerobic bottle with a cover presser, injecting an EDB standard liquid in the anaerobic bottle, placing the anaerobic bottle in a constant-temperature shaking incubator for anaerobic culture under the condition with the temperature being 30 DEG C, carrying out transferring after microorganisms reproduce to a logarithmic growth phase, basically removing solid particulates in the anaerobic bottle after transferring for 4-5 times, and effectively enabling anaerobic degrading bacteria to be enriched. The anaerobic degrading bacterial agent provided by the invention can efficiently degrade EDB and is suitable for bioremediation of groundwater contaminated by bromo-hydrocarbon.

The invention discloses amino-acid ester bromide type chiral ionic liquid and a preparation method thereof. The general formula of the amino-acid ester bromide type chiral ionic liquid is A<+>Br<->, wherein A<+> is an amino-acid ester positive ion. The preparation method comprises the following steps: performing reaction on amino acid, methyl alcohol and thionyl chloride under low temperature to obtain amino-acid ester hydrochloride; performing mannich reaction on amino-acid ester hydrochloride, paraformaldehyde and acetone to obtain amino-acid ester mannich base; performing reaction on amino-acid ester mannich base and bromo-hydrocarbon to obtain the amino-acid ester chiral ionic liquid. The chiral amino-acid ester ionic liquid prepared through the preparation method disclosed by the invention has the advantages of high selectivity and chiral induction effect of a chiral substance, and non-volatilization, non-toxicity and no pollution of ionic liquid and is suitable for scale production of the fine chemical industry.

The invention provides a method for preparing 2, 3, 4, 5-tetramethoxytoluene by taking 4-hydroxy-3-methoxy-1-methyl-benzene as a raw material. The method comprises the process flows of brominating raw materials twice; then, carrying out hydrocarbonylation; and next, carrying out methoxymethylation to obtain 2, 3, 4, 5-tetramethoxytoluene. According to the invention, natural 4-hydroxy-3-methoxy-1-methyl-benzene extracted from biological oil is used as the raw material, so that the source of the raw material is relatively wide. The method is novel in ideal, simple and convenient in synthesis process, not high in requirements for reaction equipment and reaction conditions, relatively low in production cost and relatively high in industrial application value.

The present invention provides a method of converting a brominated hydrocarbon to a chlorinated hydrocarbon that involves contacting together the brominated hydrocarbon and a chlorinated ion exchange resin that has a water content of less than or equal to 30 percent by weight, based on the total weight of the chlorinated ion exchange resin and the water. The brominated hydrocarbon includes at least one replaceable bromo group, where each replaceable bromo group is independently covalently bonded to an sp3 hybridized carbon. Contact between the brominated hydrocarbon and the chlorinated ion exchange resin results in replacement of at least one replaceable bromo group of the brominated hydrocarbon with a chloro group, and correspondingly conversion of at least a portion of the brominated hydrocarbon to the chlorinated hydrocarbon.