中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

93 records (took 0.023 seconds)

    81.
    发明专利
    未知

    公开(公告)号：DK254685D0

    公开(公告)日：1985-06-06

    申请号：DK254685

    申请日：1985-06-06

    Applicant: HOECHST AG

    Inventor： BILLENSTEIN SIEGFRIED ,  KUKLA BRUNO ,  STUEHLER HERBERT

    IPC: C11C3/10 ,  C07C67/03 ,  C07C69/003 ,  C11C3/04 ,  C07C

    Abstract: A process for the preparation of fatty acid esters of short-chain primary and secondary alcohols with 1 to 5 carbon atoms by transesterification of glycerides with the said short-chain alcohols is described. In this process, a stream of the gaseous alcohol is passed through the liquid glyceride at temperatures of at least 210 DEG C. and the product mixture of gylcerol and fatty acid alkyl ester is discharged from the reaction zone with this stream and is then subjected to phase separation.

    PETROLEUM EMULSION-BREAKERS CONTAINING NITROGEN,AND THEIR USE
    84.
    发明专利
    PETROLEUM EMULSION-BREAKERS CONTAINING NITROGEN,AND THEIR USE 未知

    公开(公告)号：ZA834638B

    公开(公告)日：1984-03-28

    申请号：ZA834638

    申请日：1983-06-24

    Applicant: HOECHST AG

    Inventor： BILLENSTEIN SIEGFRIED ,  GOHLKE FRITZ JOACHIM

    IPC: B01D17/04 ,  B01D17/05 ,  C08G8/00 ,  C08G8/28 ,  C08G8/38 ,  C08G14/00 ,  C08G14/06 ,  C08G81/00 ,  C10G33/04 ,  C08G ,  B01D

    Abstract: The new petroleum breakers are obtained by reacting, at 90 DEG to 160 DEG C. and at a pH value of 6 to 9, (a) an addition product which has been obtained by reacting phenol with formaldehyde or acetaldehyde in a molar ratio of 1:1 to 3 at a temperature of 50 DEG to 80 DEG C., in the presence of an alkaline catalyst, with (b) a block polymer which contains nitrogen and which has been obtained by an addition reaction in which 10 to 80 moles of ethylene oxide and propylene oxide are added on, as a statistical average per nitrogen atom, the molar ratio of ethylene oxide to propylene oxide being 1:0.5 to 14, to ethylenediamine, propylenediamine, polyethylenepolyamines, polypropyleneamines or mixtures thereof, the ratio being 1 to 20 moles of (a) to 1 mole of (b). They are distinguished by a high degree of effectiveness when used for separating petroleum emulsions. Products which in some cases have an even greater effect are obtained if the reaction product of (a) and (b) is propoxylated.

    86.
    发明专利
    未知

    公开(公告)号：BR8303379A

    公开(公告)日：1984-02-07

    申请号：BR8303379

    申请日：1983-06-24

    Applicant: HOECHST AG

    Inventor： BILLENSTEIN SIEGFRIED ,  GOHLKE FRITZ JOACHIM ,  HILLE MARTIN ,  BOHM ROLLAND

    IPC: B01D17/04 ,  B01D17/05 ,  C08G8/00 ,  C08G8/28 ,  C08G8/36 ,  C08G81/00 ,  C08L61/08 ,  C10G33/04 ,  C08G8/26

    Abstract: The new petroleum breakers are obtained by subjecting (a) an addition reaction product which has been obtained by reacting aliphatic aldehydes with phenol in a molar ratio of 1:1 to 3:1 at temperatures of 50 DEG to 80 DEG C. in the presence of an alkaline catalyst, to a condensation reaction at 80 DEG to 150 DEG C., after prior neutralization and, if appropriate, in the presence of inert solvents, with (b) a block polymer which has been prepared by reacting polypropylene glycols having molecular weights of 1,300 to 3,000 with 20 to 100% by weight of ethylene oxide in the presence of alkaline catalysts, in a ratio of 0.5 to 4 moles of (a) to 1 mole of (b), and removing the water of the reaction which is formed, and (c) adding on 10 to 400 g of propylene oxide, relative to 100 g of condensation product, or 10 to 200 g of ethylene oxide and propylene oxide in a ratio of 1:0.5 to 14, relative to 100 g of condensation product, in an addition reaction, to the etherified phenol/aldehyde condensation product thus obtained. When used for separating petroleum emulsions, they effect, in particular, a high and rapid removal of salt.

Patent Agency Ranking