29.
    发明专利
    未知

    公开(公告)号:BR7403189D0

    公开(公告)日:1974-12-24

    申请号:BR318974

    申请日:1974-04-19

    Applicant: BASF AG

    Inventor: PLATZ R DOCKNER T

    Abstract: Manufacture of carboxamides by the addition of water to nitriles in the presence of a copper-containing and magnesium silicate-containing catalyst which has been treated with a reducing gas. The carboxamides obtained by the process of the invention are valuable starting materials for the manufacture of solvents, flocculating agents, crosslinking agents, pesticides, plant protectants, textile auxiliaries such as levelling agents, waterproofing agents, foam stabilizers and detergents.

    30.
    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

    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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