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    11.
    发明专利
    未知

    公开(公告)号：SE339070B

    公开(公告)日：1971-09-27

    申请号：SE656669

    申请日：1969-05-08

    Applicant: BASF AG

    Inventor： NAGEL O ,  WEINFURTER K ,  WOLF D ,  PLATZ R ,  TAGLIEBER K

    IPC: C07C7/00 ,  F25J3/02 ,  C10L3/02

    Abstract: A gas mixture (obtained by thermal cracking of hydrocarbons followed by quenching of the cracked gas and freed from carbon dioxide and water) is separated into a gas mixture containing hydrogen, carbon monoxide and methane and another gas mixture containing ethylene, acetylene and higher hydrocarbons by (a) cooling the gas mixture which is at superatmospheric pressure in at least one condensation stage to a temperature which is above the solidification temperature of acetylene mixed with the other condensed constituents, (b) separating the condensate thus obtained and subdividing it in a rectifying column into a first mixture containing C2 hydrocarbons and a second mixture containing C3 and higher hydrocarbons, and (c) freeing the residual gas remaining from (a) from residual acetylene and ethylene in a scrubber by treatment with some of the mixture consisting of C3 and higher hydrocarbons from (b).

    RECOVERY OF ISOBUTYLENE FROM MIXTURES CONTAINING THE SAME AND BUTADIENE
    14.
    发明专利
    RECOVERY OF ISOBUTYLENE FROM MIXTURES CONTAINING THE SAME AND BUTADIENE 未知

    公开(公告)号：CA929961A

    公开(公告)日：1973-07-10

    申请号：CA76135

    申请日：1970-02-27

    Applicant: BASF AG

    Inventor： SCHLOEMER K ,  WEITZ H ,  PLATZ R ,  NAGEL O

    IPC: C07C7/148 ,  C07C7/171

    Abstract: 1290072 Recovering isobutylene and butadiene BADISCHE ANILIN- & SODA-FABRIK AG 27 Feb 1970 [1 March 1969] 9508/70 Heading C5E Isobutylene and butadiene are recovered from C 4 -hydrocarbon mixture containing inter alia isobutylene and 0À01-60 wt. per cent butadiene by the following steps:- (a) contact at 25-35‹ C. with an absorption mixture containing 2-25 wt. per cent tert.- butanol, 30-45 wt. per cent sulphuric acid and 30-55 wt. per cent water, whereby isobutylene is hydrated to form more tert.-butanol, most of the butadiene being recovered as raffinate gas; (b) distilling the resulting mixture to obtain an azeotrope of tert.-butanol with about 12% of water; (c) fractionating the azeotrope to obtain a pure fraction comprising not more than 0À03 wt. per cent of impurities; and (d) dehydrating tert.-butanol contained in said pure fraction by contact with active alumina.

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