摘要:
The purpose of this invention is to describe a new process for the manufacture of choroethene (C.sub.2 H.sub.3 Cl). This new process involves the use or ethylene (C.sub.2 H.sub.4) as a feedstock. Highly chlorinated ethenes or methanes are used as chlorinating agents. The corresponding less chlorinated ethenes or methanes are recovered as co-products or recycled to the process to produce additional chloroethene. The distribution of the products may be adjusted so that chloroethene is the major product.
摘要翻译:本发明的目的是描述用于制备氯乙烯(C 2 H 3 Cl)的新方法。 该新方法涉及使用乙烯(C 2 H 4)作为原料。 高氯化乙烯或甲烷用作氯化剂。 相应的较少氯化的乙烯或甲烷作为副产物回收或再循环至该方法以产生另外的氯乙烯。 可以调整产品的分布,使氯乙烯成为主要产品。
摘要:
A catalytic asymmetric reduction process, which, by hydrogenating trisubstituted olefins, yields a corresponding organic compound having a high level of enantiomeric purity is disclosed. The process is also effective for the catalytic asymmetric reduction of certain enamines and related compounds to yield a corresponding amine or related compound, respectively, having a high level of enantiomeric purity. The reduction process utilizes a chiral metal catalyst that includes a metal or metal complex that is selected from groups 3, 4, 5, or 6, lanthanides and actinides. Moreover, the process uses hydrogen as the stoichiometric reducing agent and may be carried out at pressures ranging from about 0.5 to 200 atmospheres. The reaction can also be carried out using an acidic compound as a rate enhancing additive.
摘要:
Process for preparing 1-chloro-1,3-butadiene, which consists in gas-phase dehydrochlorinating a dichlorobutene selected from 3,4-dichloro-1-butene and 1,4-dichloro-2-butene, in the presence of a catalyst selected from lanthanum phosphate and lanthanum phosphate doped with an alkali or alkaline-earth metal.
摘要:
A novel process for the preparation of a chlorinated polyolefin having excellent low temperature characteristics and brightness is provided which comprises allowing a polyolefin dissolved or suspended in a solvent to undergo chlorination reaction with chlorine gas or chlorinated sulfuryl in the presence of a radical initiator as a catalyst, characterized in that as said solvent there is used 1,1,2-trichloroethane and the temperature is controlled to 90.degree. C. or lower at the process for removing hydrogen chloride and/or sulfur dioxide by-produced during the reaction from the reaction system. A further process for the preparation of a chlorosulfonated polyolefin having excellent low temperature characteristics and brightness is provided which comprises allowing a polyolefin dissolved or suspended in a solvent to undergo chlorosulfonation reaction with chlorine and sulfur dioxide, chlorine and sulfuryl chloride, sulfuryl chloride alone, chlorine, sulfur dioxide and sulfuryl chloride or sulfuryl chloride and sulfur dioxide in the presence of a radical initiator as a catalyst, characterized in that as said solvent there is used 1,1,2-trichloroethane and the temperature is controlled to 90.degree. C. or lower at the process for removing hydrogen chloride and/or sulfur dioxide by-produced during the reaction from the reaction system.
摘要:
A non-polluting oxyhydrochlorination process is provided in which the residual gaseous effluents are purified by catalytic oxidation in the presence of a catalyst comprising platinum and/or iridium deposited on a special alumina support of eta crystallographic structure and then washing the effluent before being discharged into the atmosphere.The process of the invention is particularly applicable to a residual effluent containing essentially carbon monoxide, carbon dioxide, ethylene, 1,2-dichloroethane, and at least one chlorinated hydrocarbon from among the group consisting of chloroform, carbon tetrachloride, ethyl chloride, 1,1-dichloroethane, 1,1,1- and 1,1,]-trichloroethanes, 1,1,2,2- and 1,1,1,2- tetrachloroethanes, vinyl chloride, 1,1- and 1,2-dichloroethylenes, trichloroethylene, perchloroethylene and chloral.
摘要:
Process for the selective catalytic oxidation of carbon monoxide in the presence of olefin monomers without appreciable oxidation of such monomers. According to this process, a gaseous waste stream containing carbon monoxide, olefin monomers, and a variety of other agents, is contacted with a catalytically effective amount of copper chromite, preferably in an oxygen enriched environment, at temperatures in the range from about 200.degree. C. to about 325.degree. C. The contact time of the stream with the catalyst bed can vary within broad limits, and the duration of which will vary inversely with the temperature of the catalyst bed.
摘要:
The present invention relates to a novel catalyst system for chlorination of hydrocarbons either by oxyhydrochlorination, and/or oxychlorination. The catalyst system comprises copper chloride impregnated onto an alumina support with a metal chloride selected from the group consisting of potassium chloride, lithium chloride, cesium chloride, magnesium chloride, calcium chloride or barium chloride, said alumina support having a sodium oxide content of from 0.2 to about 2.0% by weight and a silica content no more than 4%.
摘要:
Improved working up of the waste from an isomerization reaction of dichlorobutene by precipitating the copper catalyst used in said process by adding a polar solvent and removing the resulting precipitate by filtration.
摘要:
Isobutene is oxidatively coupled with vinylidene chloride by heating in the presence of palladium acetate, to give 1,1-dichloro-4-methylpenta-1,3-diene. This compound is useful as an intermediate in the production of insecticides. Any 1,1-dichloro-4-methylpenta-1,4-diene also produced is thermally isomerized to the 1,3 product.