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    Process for the manufacture of sorbic acid
    3.
    发明授权
    Process for the manufacture of sorbic acid 失效
    制造山梨酸的方法

    公开(公告)号：US3865872A

    公开(公告)日：1975-02-11

    申请号：US32638573

    申请日：1973-01-24

    Applicant: HOECHST AG

    Inventor： FERHOLZ HANS ,  SCHMIDT HANS-JOACHIM ,  WUNDER FRIEDRICH

    IPC: C07C57/10 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/09 ,  C07C67/00

    CPC classification number: C07C51/09 ,  C07C57/10

    Abstract: Sorbic acid is prepared by splitting the ketene/crotonic aldehyde polyester in the presence of a macro-reticulated exchange resin having a pore diameter of at least 200 A on the average and a water content of less than 20 percent by weight. The process can be carried out discontinuously or continuously with a good yield, the sorbic acid obtained having a high quality.

    Abstract translation: 通过在孔径为至少200A的大网状交换树脂的存在下平均分解乙烯酮/巴豆醛聚酯并且水含量小于20重量％来制备山梨酸。 该方法可以不间断地或连续地以良好的产率进行，获得的山梨酸具有高质量。

    Verfahren zur herstellung vinylacetat
    9.
    发明专利
    Verfahren zur herstellung vinylacetat 未知

    公开(公告)号：SG44750A1

    公开(公告)日：1997-12-19

    申请号：SG1996006902

    申请日：1992-06-17

    Applicant: HOECHST AG

    Inventor： WIRTZ PETER ,  WORNER KARL-FRED ,  WUNDER FRIEDRICH ,  EICHLER KLAUS ,  ROSCHER GUNTER ,  NICHOLAU LOAN

    IPC: B01J23/44 ,  B01J23/06 ,  B01J23/48 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/89 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  C07C

    Abstract: Prodn. of catalysts (I) involves (a) washing the ignited support particles with an acid which does not react with silica or alumina, until no more binder cations are washed out, (b) impregnating with Pd and Au or Cd, (c) contacting with a soln. of a base until there is no further change in the thickness of the noble metal layer produced on the particle surface and (d) impregnating with an alkali cpd. Catalyst contains Pd and/or Pd cpds. and alkali cpds., together with Cd cpds. and/or Au or Au cpds., on particles of a SiO2 or SiO2/Al2O3 substrate which is obtd. by pressing with the binder aid consisting of Li, Mg, Al, Zn, Fe and/or Mn 2-26C carboxylate(s), and igniting for 0.25-5 hrs. at 500-900 deg. C in oxgyen-contg. gas, to give a prod. with surface area 50-250 m2/g, pore vol. 0.4-1.2 ml/g and particle size 1-15mm, in which 5-20 vol. % of the pores have radius = 200-3000 Angstrom and 50-90 vol. % have radius = 70-100 Angstrom. Acid in (a) is pref. HCl, H2SO4, H3PO4 or HNO3, pref. HCl, the base in (c) is an alkali hydroxide, and a potassium cpd. is used in stage (d). Pref. (I) is obtd. by mixing glass microspheres (silica/alumina; at least 95 wt. % silica; obtd. by flame hydrolysis) with 10-20C Mg or Al carboxylate, pressing and igniting as above to give 5-7mm pellets, washing for 10-14 hours, with 10-20% HCl, drying impregnating with a soln. of PdCl2 and AuCl3 or Cd salt (chloride, nitrate etc.), precipitating with NaOH soln., impregnating with KOAc and drying; vinyl acetate prodn. is carried out at 120-200 deg. C and 1-20 bar, using a gas mixt. contg. not above 10 vol. % oxygen.

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