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    2.
    发明专利
    未知

    公开(公告)号：DE1089759B

    公开(公告)日：1960-09-29

    申请号：DEB0050056

    申请日：1958-08-22

    Applicant: BASF AG

    Inventor： SCHICKH DR OTTO V ,  ROTZOLL DR RUDI-HEINZ

    Abstract: Saturated hydroxy carboxylic acid nitriles and/or unsaturated carboxylic acid nitriles are prepared by reacting a lactone or a C-alkylated lactone with gaseous ammonia in the presence of an acid dehydration catalyst at elevated temperature. The omega-hydroxy carboxylic acid amide may be obtained as by-products. Specified lactones are gamma-butyro-, deltavalero-, epsilon-capro-, zeta-oenantho-, etacaprylo-lactones and their alkyl derivatives. Suitable dehydration catalysts include phosphoric acid, acid phosphates, boron phosphates and sulphuric acid and its acid salts, as such or on carriers.

    7.
    发明专利
    未知

    公开(公告)号：DE1208494B

    公开(公告)日：1966-01-05

    申请号：DEB0063794

    申请日：1961-08-26

    Applicant: BASF AG

    Inventor： EILBRACHT DR HANS ,  ROTZOLL DR RUDI-HEINZ ,  TRIESCHMANN DR HANS-GEORG ,  URBAN DR FRIEDRICH

    IPC: C07C7/11 ,  C08F10/00

    Abstract: Recycle ethylene in the high pressure polymerization of ethylene is purified by washing at least 25% of the ethylene, after any polyethylene having a molecular weight of more than 20,000 has been separated, with liquid ethylene at below 50.9 atmospheres. After the polythylene has been separated, a portion, e.g. 5-20%, of the recycle ethylene may be liquefied and the remainder of the recycle ethylene is washed with the liquefied ethylene. The washing may be carried out in a wash column with the liquid ethylene in counter-current to the gas at 25-40 atmospheres and -25 to 0 DEG C. The polyethylene may be used to form sheets.ALSO:Recycle ethylene in the high pressure polymerization of ethylene is purified by washing at least 25% of the ethylene, after any polyethylene having a molecular weight of more than 20,000 has been separated, with liquid ethylene at below 50.9 atm. After the polyethylene has been separated, a portion, e.g. 5-20% of the recycle ethylene may be liquefied and the remainder of the recycle ethylene is washed with the liquefied ethylene. The washing may be carried out in a wash column with the liquid ethylene in counter current to the gas at 25-40 atm. and - 25 DEG to 0 DEG C. The polyethylene may be used to form sheets.

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