Preparation of acrylic acid
    3.
    发明授权
    Preparation of acrylic acid 失效
    丙烯酸的制备

    公开(公告)号:US3624147A

    公开(公告)日:1971-11-30

    申请号:US3624147D

    申请日:1969-05-20

    CPC classification number: C07C51/252 C07C57/04

    Abstract: Acrylic acid is prepared by oxidizing propylene with air in the presence of water and a platinum, rhodium, rutheniun or palladium metal catalyst at a temperature above 50* C. and a pressure exceeding 5 bars gauge. A supported palladium catalyst is preferred. Acrylic acid is obtained in about 60 percent yield based on propylene converted and the small amounts of acrolein obtained may be oxidized to acrylic acid.

    THE PREPARATION OF ACRYLIC ACID
    6.
    发明专利

    公开(公告)号:GB1223783A

    公开(公告)日:1971-03-03

    申请号:GB2577469

    申请日:1969-05-20

    Abstract: 1,223,783. Acrylic acid. RHONE-POULENC S.A. 20 May, 1969 [21 May, 1968], No. 25774/69. Heading C2C. Acrylic acid is prepared by oxidizing propylene with molecular oxygen or a gas containing molecular oxygen in the presence of water and a noble metal of Group VIII of the Periodic Table at a temperature above 50‹ C. and under a pressure exceeding 5 bars gauge. The catalyst may be deposited on a carrier such as alumina, silica gel, aluminium oxide, aluminium silicate, pumice, active charcoal or bentonite. Examples describe the use of palladium on carbon black or alumina.

    8.
    发明专利
    未知

    公开(公告)号:DE2430862A1

    公开(公告)日:1975-01-16

    申请号:DE2430862

    申请日:1974-06-27

    Abstract: The esters have formula:- where n is 1-2, R1R2 are H or CH3, R is 14-22C sat. or unsat. aliphatic, Y is X or H, alkali metal or -NH4 and are prepd. by reaction of an ester of hydroxycarboxylic acid HO-X with adipic acid in mol. ratio 0.8:1-1.2:1 or 1.8:1-2.2:1 at 150-230 pref. 200-220 degrees C or by reacting 1-2 moles hydroxycarboxylic acid and 0.8-1.2 or 1.8-2.2 moles alcohol R-OH and 1 mole adipic acid simultaneously. R is hexadecyl or octadecyl e.g. product is di- or mono adipic ester(s) of hexa(octa)decyl lactate.

    10.
    发明专利
    未知

    公开(公告)号:DE1813182A1

    公开(公告)日:1969-09-04

    申请号:DE1813182

    申请日:1968-12-06

    Abstract: Aldehydes, ketones and carboxylic acids are made by the oxidation of organic compounds, especially olefines, with oxygen in the presence of a Group VIII metal catalyst and in a liquid medium comprising dimethylsulphoxide alone or mixed with water.

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