2.
    发明专利
    未知

    公开(公告)号:ES2117103T3

    公开(公告)日:1998-08-01

    申请号:ES93306200

    申请日:1993-08-05

    Abstract: A method of producing stabilized crude acetonitrile (i.e. acetonitrile which has been treated to substantially eliminate polymerization of the acetonitrile upon vaporization) which comprises mixing crude acetonitrile, a strong base and aldehyde together, heating to the reflux temperature of the mixture to stabilize the crude acetonitrile and recovering the stabilize acetonitrile. This stabilized acetonitrile is utilized to manufacture hydrogen cyanide.

    3.
    发明专利
    未知

    公开(公告)号:DE3781555D1

    公开(公告)日:1992-10-08

    申请号:DE3781555

    申请日:1987-11-10

    Abstract: In hydrocarboxylating an alpha-enamide with CO and an organic hydroxyl cpd. to produce an N-acyl-alpha-amino acid ester whose alpha C atom is chiral, the improvement comprises using as the organic hydroxyl cpd. reactant an organic hydroxyl cpd. which also has a chiral C atom that is all L or D, thereby producing a reaction mixt. having no enantiomeric pairs and contg. diastereomeric N-acyl-alpha-amino acid esters having 2 chiral centres, the hydrocarboxylating simultaneously creating (1) the ester, the chirality of the alpha C atom in L, D furn and (2) the second chiral centre in the ester in all L or all D form.

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