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    Improvements in the formation of drops of liquid
    3.
    发明专利
    Improvements in the formation of drops of liquid 未知

    公开(公告)号：GB811032A

    公开(公告)日：1959-03-25

    申请号：GB3399055

    申请日：1955-11-28

    Applicant: BASF AG

    Inventor： EILBRACHT HANS ,  HAEBERLE MANFRED

    IPC: B01J2/02

    Abstract: 811,032. Drop-moulding machines. BADISCHE ANILIN- & SODA-FABRIK A.G. Nov. 28, 1955, No. 33990/55. Addition to 789,685. Class 87(2). [Also in Group XVIII] Drops which may be formed into pellets by allowing them to fall onto a cool surface 4 or which may be allowed to fall into and mix with a liquid are formed by supplying the liquid to a tube 1 and reciprocating a piston 2, the lower end of which projects below the tube. The piston may have enlargements or constrictions and the tube may taper. The piston may be reciprocated by an electromagnet or a cam. In a modification, Fig. 2 (not shown), the gap between the piston and the tube is so small that liquid will not flow continuously with the piston stationary.

    Purification of recycle ethylene in the high pressure polymerisation of ethylene
    9.
    发明专利
    Purification of recycle ethylene in the high pressure polymerisation of ethylene 未知

    公开(公告)号：GB1009108A

    公开(公告)日：1965-11-03

    申请号：GB3202262

    申请日：1962-08-21

    Applicant: BASF AG

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