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    31.
    发明专利
    未知

    公开(公告)号：DE19743197A1

    公开(公告)日：1999-04-01

    申请号：DE19743197

    申请日：1997-09-30

    Applicant: BASF AG

    Inventor： PACIELLO ROCCO DR ,  ZELLER EDGAR DR ,  BREIT BERNHARD PROF DR ,  ROEPER MICHAEL PROF DR

    IPC: C07C45/50 ,  C07B61/00 ,  C07F9/6568 ,  C07F15/00

    Abstract: The invention relates to a method for producing phosphabenzene compounds of general formulas (I) and (II) wherein R to R , independent of one another, represent hydrogen, COOM, SO3M, NR3X, NR2, OR, COOR or SR with M = hydrogen, NH4 or alkaline metal, X = anion, R = hydrogen or C1-6 alkyl, or C1-12 alkyl, C6-12 aryl, C7-12 alkylaryl or C3-6 heterocycloalkyl with 1 to 3 heteroatoms which can be substituted with the prominent residuals or bonded to annulated rings; and -W- signifies a bridge comprised of a covalent bond, an oxo group, a sulfur group, an amino group, a Di-C1-6 alkyl silicium group, or a C1-16 residual which can be a component of one or more bonded cyclic or aromatic nuclei and can be interrupted by 1 to 3 heteroatoms. Each o-position or m-position of the phosphabenzene nuclei which is not bonded on said bridge can carry one of the residuals R to R with the exception of bis-3,3'(3(2,4,6-triphenylphosphabenzene)-1,1'-diphenyl. Corresponding pyrylium salts are reacted with PH3 in the presence of a catalytic quantity of acid and in the presence or absence of a solvent or diluting agent. The pyrylium salts are brought together with PH3 at a temperature above 0 DEG C and are reacted at a temperature ranging from above 0 DEG C up to 200 DEG C and with a pressure above 1 bar.

    35.
    发明专利
    未知

    公开(公告)号：DE19529239A1

    公开(公告)日：1997-02-13

    申请号：DE19529239

    申请日：1995-08-09

    Applicant: BASF AG

    Inventor： ACHHAMMER GUENTHER DR ,  ROEPER MICHAEL PROF DR

    IPC: C07C67/54 ,  C07C69/716 ,  C07C69/738 ,  C07C67/38

    Abstract: The production of 5-formyl valeric acid ester with a yield of not less than 90 % by the distillation of a mixture of 5-formyl valeric acid ester and either 3 or 4-formyl valeric acid ester or a mixture of 3 and 4-formyl valeric acid esters, in which the ester radicals of the formyl valeric acid esters are identical, by separating the 3 or 4-formyl valeric acid esters of their mixtures from the 5-formyl valeric acid ester at a pressure between 2 and 100 mbar and a temperature not exceeding 150 DEG C (measured as the column well temperature) in a distillation column, and using the corresponding ethyl or ethyl ester as the esters, and in which the purity of the 5-formyl valeric ester is no lower than 98 % and 4-formyl valeric acid ester is present as an impurity in a quantity of no more than 100 ppm.

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