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    1.
    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).

    2.
    发明专利
    未知

    公开(公告)号：SE333790B

    公开(公告)日：1971-03-29

    申请号：SE1139667

    申请日：1967-08-11

    Applicant: BASF AG

    Inventor： PLATZ R ,  TAGLIEBER K ,  WEINFURTER K

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

    Abstract: 1,187,809. Acetylene and ethylene. BADISCHE ANILIN- & SODA-FABRIK A.G. 11 Aug., 1967 [12 Aug., 1966], No. 36972/67. Heading C5E. [Also in Division F4] Joint separation of acetylene and ethylene together with some methane and ethane from cracked gas obtained by a flame burning beneath the surface of petroleum and containing carbon monoxide, hydrogen, oxygen nitrogen, C 3 to C 5 hydrocarbons together with carbon oxysulphide and carbon disulphide is effected by drying and compressing the cracked gas at 2, 4 condensing part of the methane and the whole of the remaining hydrocarbons, C5 2 and COS in a heat exchanger 9, separating them at 10, 11 vaporizing the separated condensate in said heat exchanger 9, compressing the vapour at 15 and thereafter passing said separated fraction under pressure through lines 12, 12b, 19 into a rectification column 6 from which product ethylene and acetylene vapour containing methane and ethane is withdrawn through a line 25 whilst liquid bottoms containing the whole of the C 3 to C 5 hydrocarbons, C5 2 and COS are withdrawn through a line 27. Said liquid bottoms may be returned through a line 29 to the burner of the cracking plant or is vaporized at 28 and returned to the feed line 8 of heat exchanger 9 which latter is cooled by a return flow of uncondensed gases from separators 10, 11 after expansion in a turbine 14. The concentration of acetylene in column 6 is maintained below a predetermined safe level by adding a mixture of methane, ethylene and ethane in a line 20 to the feed in line 19. Exchanger 9 is cooled by vapour withdrawn from separator 10 and expanded in a turbine 14.

    3.
    发明专利
    未知

    公开(公告)号：SE366290B

    公开(公告)日：1974-04-22

    申请号：SE1426068

    申请日：1968-10-22

    Applicant: BASF AG

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

    IPC: C10G5/00 ,  C07C7/00 ,  C07C11/00

    Abstract: 1,236,068. Purifying cracked gas. BADISCHE ANILIN- & SODA-FABRIK A.G. 25 Oct., 1968 [27 Oct., 1967], No. 50666/68. Heading C5E. Cracked gas containing acetylene, ethylene and higher hydrocarbons is freed from water vapour by the following process sequence: (a) contacting the gas, with or without pro-drying by cooling, with methanol; (b) cooling the treated gas in a heat exchanger to condense the major portion of entrained methanol and separating the condensed liquid from uncondensed gas; (c) separating the methanolcontaining condensate (with or without liquified hydrocarbon mixture separated by further cooling from uncondensed gas resulting from stage (b)) in a rectifying column into an overhead consisting substantially of C 2 hydrocarbons and a bottoms consisting of C 3 and higher hydrocarbons and methanol; (d) extracting the bottoms product with water to recover methanol therefrom; (e) freeing the extract from water, e.g. by distillation, optionally simultaneously with removing water from the aqueous methanol resulting from step (a); and (f) returning regenerated methanol to step (a). Alternative methods of operating the process are described with the aid of flow-diagrams.

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