Process for producing an olefin by decomposition of the corresponding
ether
    4.
    发明授权
    Process for producing an olefin by decomposition of the corresponding ether 失效
    通过相应的醚分解生产烯烃的方法

    公开(公告)号:US4395580A

    公开(公告)日:1983-07-26

    申请号:US316376

    申请日:1981-10-29

    摘要: Process for producing very pure olefins of the formula ##STR1## by decomposition of the corresponding ethers of formula ##STR2## wherein R.sub.1 and R.sub.3 are selected from the group of the alkyl, arylalkyl aryl or alkylaryl radicals, R and R.sub.2 being a hydrogen atom or a radical selected from said above mentioned group, in the presence of steam in a molar proportion from 2 to 8 times the ether amount and with the use of a catalyst comprising alumina to which is added 0.01 to 5% by weight of titanium or zirconium or hafnium as metal or as metal compound, said catalyst having a specific surface from 80 to 300 m.sup.2 /g.

    摘要翻译: 制备式“IMAGE”的非常纯的烯烃的方法是通过分解相应的式“IMAGE”的醚,其中R 1和R 3选自烷基,芳基烷基芳基或烷基芳基,R 2和R 2是氢原子或 选自上述基团的基团,在蒸汽存在下,摩尔比例为乙醚量的2至8倍,并且使用包含氧化铝的催化剂,其中加入0.01至5重量%的钛或锆或 铪作为金属或金属化合物,所述催化剂具有80至300m 2 / g的比表面积。

    Process for manufacturing and recovering methyl tert.butyl ether
    5.
    发明授权
    Process for manufacturing and recovering methyl tert.butyl ether 失效
    制备和回收甲基叔丁基醚的方法

    公开(公告)号:US4310710A

    公开(公告)日:1982-01-12

    申请号:US121565

    申请日:1980-02-14

    IPC分类号: C07C41/06

    摘要: Methyl tert.butyl ether is obtained by reacting an isobutene-containing C.sub.4 cut with methanol and distilling the reaction product at a superatmospheric pressure of 7-30 atm. abs. to recover a top fraction and a bottom fraction containing methyl tert.butyl ether. The isobutene conversion rate and the purity of the ether are increased by recycling a portion of the top fraction to the reaction zone.

    摘要翻译: 通过使异丁烯的C4馏分与甲醇反应并在7-30atm的超大气压下蒸馏反应产物来获得甲基叔丁基醚。 绝对 以回收含有甲基叔丁基醚的顶部馏分和底部馏分。 通过将顶部馏分的一部分再循环到反应区来提高异丁烯转化率和乙醚的纯度。

    Process for producing gasoline of high octane number, in particular
lead-free gasoline
    6.
    发明授权
    Process for producing gasoline of high octane number, in particular lead-free gasoline 失效
    生产高辛烷值汽油的方法,特别是无铅汽油

    公开(公告)号:US4270929A

    公开(公告)日:1981-06-02

    申请号:US71503

    申请日:1979-08-31

    IPC分类号: C10G3/00 C07C2/30 C10L1/02

    摘要: Process for producing gasoline of high octane number from C.sub.3 and C.sub.4 olefinic cuts, such as those obtained by fractional distillation of a C.sub.3 / C.sub.4 catalytic cracking cut, comprising the steps of:(a) oligomerizing propylene of the C.sub.3 cut to obtain a first gasoline fraction,(b) reacting the isobutene of the C.sub.4 cut with methanol to produce methyl tert.-butyl ether which is separated from the unreacted C.sub.4 hydrocarbons to form a second gasoline fraction,(c) alkylating said unreacted C.sub.4 hydrocarbons with isobutane in the presence of an alkylation catalyst such as hydrofluoric acid, to form a third gasoline fraction, and(d) admixing, at least partially, said first, second and third gasoline fractions, so as to obtain gasoline of high octane number.

    摘要翻译: 用于从C3和C4烯烃切割生产高辛烷值的汽油的方法,例如通过C3 / C4催化裂化馏分的分馏获得的那些,包括以下步骤:(a)将C3馏分的丙烯低聚得到第一种汽油 馏分,(b)使C4馏分的异丁烯与甲醇反应,生成与未反应的C4烃分离的甲基叔丁基醚形成第二汽油馏分,(c)在存在的情况下用异丁烷烷基化所述未反应的C4烃 的烷基化催化剂如氢氟酸,以形成第三汽油馏分,和(d)至少部分地混合所述第一,第二和第三汽油馏分,以获得高辛烷值的汽油。