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    Process for production sorbic acid
    32.
    发明授权
    Process for production sorbic acid 失效
    山梨酸生产工艺

    公开(公告)号：US4639294A

    公开(公告)日：1987-01-27

    申请号：US755518

    申请日：1985-07-16

    申请人： Noboru Kamei ,  Kinjiro Ikeda ,  Keishi Aoyama ,  Seitaro Hamano

    发明人： Noboru Kamei ,  Kinjiro Ikeda ,  Keishi Aoyama ,  Seitaro Hamano

    IPC分类号： C07C57/10 ,  C07C51/00 ,  C07C51/09 ,  C07C51/42 ,  C07C51/46 ,  C07C67/00 ,  B01D3/12

    CPC分类号： C07C51/42

    摘要： A process for producing sorbic acid is described, by first reacting crotonaldehyde with ketene to prepare a polyester, then decomposing the polyester with hydrochloric acid, separating the crude sorbic acid from the reaction solution, and purifying the separated sorbic acid, said purifying step comprising the following steps:(a) continuously dissolving the crude sorbic acid in petroleum at a temperature in the range of from 100.degree. to 140.degree. C. while evaporating the residual water and hydrochloric acid from the solution of the sorbic acid in petroleum;(b) separating the tar content from the petroleum solution in a separation column at a temperature in the range of from 100.degree. to 140.degree. C.; and(c) subjecting the mixture of sorbic acid and petroleum to flash evaporation in a film-type evaporator at a reduced pressure in the range of from 20 to 60 mmHg, with the evaporation residue being withdrawn from the bottom of the evaporator and recycled to step (a).

    摘要翻译： 通过首先使巴豆醛与烯酮反应制备聚酯，然后用盐酸分解聚酯，将粗山梨酸与反应溶液分离，并纯化分离的山梨酸，描述了制备山梨酸的方法，所述纯化步骤包括 以下步骤：（a）将粗山梨酸在100-140℃的温度范围内连续溶解于石油中，同时从石油中的山梨酸溶液中蒸发残留的水和盐酸; （b）在100-140℃的温度范围内，将石油溶液中的焦油含量从分离塔中分离出来; 和（c）将山梨酸和石油的混合物在薄膜型蒸发器中在20至60mmHg的减压下进行闪蒸，蒸发残余物从蒸发器的底部排出并再循环至 步骤（a）。

    Method for producing a granular sorbic acid
    36.
    发明授权
    Method for producing a granular sorbic acid 失效
    生产粒状山梨酸的方法

    公开(公告)号：US4133857A

    公开(公告)日：1979-01-09

    申请号：US692626

    申请日：1976-06-03

    申请人： Masaaki Takano ,  Masahiro Nakajima

    发明人： Masaaki Takano ,  Masahiro Nakajima

    IPC分类号： C07C57/10 ,  B01J2/20

    CPC分类号： C07C57/10

    摘要： A granular sorbic acid having improved properties is prepared in a very simple manner without need of any particular preparation as in conventional methods, i.e. by granulating by extrusion, powder having particle sizes of ASTM No. 70 sieve pass in the presence of water or water containing a surfactant. The resulting granule has a suitable hardness and hence scarcely collapses at the time of drying after granulation and subsequent handling, but has a rapid dispersibility into foods at the time of its use.

    摘要翻译： 具有改进性能的颗粒状山梨酸以非常简单的方式制备，而不需像常规方法那样进行任何具体的制备，即通过挤出成型，在水或含水的存在下，通过ASTM No.70筛选的颗粒 表面活性剂。 所得颗粒具有合适的硬度，因此在造粒和随后的处理后干燥时几乎不会崩溃，但在使用时具有快速的分散性。

    Process for the manufacture of sorbic acid
    40.
    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

    申请人： HOECHST AG

    发明人： FERHOLZ HANS ,  SCHMIDT HANS-JOACHIM ,  WUNDER FRIEDRICH

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

    CPC分类号： C07C51/09 ,  C07C57/10

    摘要： 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.

    摘要翻译： 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。