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RECOVERY OF ISOBUTYLENE FROM MIXTURES OF HYDROCARBONS AS METHYL TERT.BUTYL ETHER
RECOVERY OF ISOBUTYLENE FROM MIXTURES OF HYDROCARBONS AS METHYL TERT.BUTYL ETHER
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机译:从烃类混合物中回收异丁烯作为甲基叔丁基丁醚
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1532477 Separating isobutylene by selective reaction MAGYAR ASVANYOLAJ ES FOLDGAZ KISERLETI INTEZET 7 Oct 1976 [29 Oct 1975] 41688/76 Heading C5E [Also in Division C2] Isobutylene is removed as methly t-butyl ether from mixtures containing predominantly isobutylene and other C 4 hydrocarbons by reacting with a stoichiometric excess of the required quantity of methanol in the presence of sulphuric acid catalyst in a homogeneous liquid phase at 50-120‹ C.; after the reaction the mixture is cooled to between -25 and +40‹ C. and a quantity of reaction product from which methanol has been removed and/or a quantity of a C 4 fraction free ofisobutene obtained in the process is added; the sulphuric acid phase which then separates is recirculated to the reaction, and methanol and methyl t-butyl ether are isolated by aqueous washing and distilling the residual mixture which contains sulphuric acid in a reduced quantity. The C 4 hydrocarbon mixtures may be a fraction derived from a catalytic cracking process or from the pyrolysis of gasoline, and may contain butadiene as well as butanes and butenes.
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机译:1532477通过选择性反应分离异丁烯1976年10月7日[1975年10月29日] 41688/76标题C5E [也在C2分部中]异丁烯作为甲基叔丁基醚从主要包含异丁烯和其他C 4烃的混合物中除去在硫酸催化剂存在下,在50-120℃的均匀液相中,与化学计算过量的所需量的甲醇反应;反应后,将混合物冷却至-25至+ 40℃,并加入一定量的已除去甲醇的反应产物和/或在该方法中获得的一定量的不含异丁烯的C 4馏分;然后将分离出的硫酸相再循环至反应中,并通过水洗并蒸馏除去残留的含有少量硫酸的混合物,分离出甲醇和甲基叔丁基醚。 C 4烃混合物可以是源自催化裂化过程或源自汽油热解的馏分,并且可以包含丁二烯以及丁烷和丁烯。
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