Process for concentrating azelaic acid
    1.
    发明授权
    Process for concentrating azelaic acid 失效
    浓缩壬二酸的方法

    公开(公告)号:US5973173A

    公开(公告)日:1999-10-26

    申请号:US844804

    申请日:1997-04-22

    CPC分类号: C07C51/083 C07C51/44

    摘要: Pure azelaic acid is obtained by working up a reaction mixture containing C.sub.1-18 monocarboxylic acids, mainly pelargonic acid, and C.sub.4-16 dicarboxylic acids, mainly azelaic acid, obtained from the ozonolysis of oleic acid or a starting mixture containing oleic acid. All but C.sub.9 are separated off to obtain a prepurified product containing more than 75% by weight of oleic acid and the prepurified product is concentrated to more than 90% by weight of oleic acid in several process steps. In a first process step (1), the dicarboxylic acids with chain lengths of

    摘要翻译: 通过处理由油酸的臭氧分解或含有油酸的起始混合物得到的含有C1-18单羧酸(主要是壬酸)和C4-16二羧酸(主要是壬二酸)的反应混合物,得到纯壬二酸。 分离除了<2重量%的一元羧酸和一部分链长 C9的二羧酸以获得含有超过75重量%油酸的预纯化产物,并且预纯化产物是 在几个工艺步骤中浓缩至大于90重量%的油酸。 在第一方法步骤(1)中,通过分馏作为第一次运行除去在预纯化产物中存在链长

    Process for the separation of alcohols by distillation
    3.
    发明授权
    Process for the separation of alcohols by distillation 失效
    通过蒸馏分离醇的方法

    公开(公告)号:US5710261A

    公开(公告)日:1998-01-20

    申请号:US594506

    申请日:1996-01-31

    IPC分类号: C07H15/04

    摘要: Aliphatic alcohols with up to 30 and especially with 6 to 18 carbon atoms are separated from a mixture of alkyl glycosides and alcohols which are unreacted during the production of these glycosides, by single or multi-stage distillation. The alcohols are distilled off by a drop film evaporator to impoverish the reaction mixture to residual alcohol contents of 5 wt % and under. The strip load of the drop film evaporator is set to at least 1.0 m.sup.3 /h m, especially at least 1.8 m.sup.3 /h m and preferably at least 3.0 m.sup.3 /h m. It is possible to reduce the alcohol content of the product to any value between 0.1 and 5 wt % at acceptable overall cost.

    摘要翻译: 通过单阶段或多阶段蒸馏,在生产这些糖苷期间将具有多达30个,特别是6至18个碳原子的脂族醇从烷基糖苷和醇的混合物中分离出来,所述烷基糖苷和醇是未反应的。 通过滴膜蒸发器蒸馏掉醇,将反应混合物贫化至5重量%以下的残留醇含量。 降膜蒸发器的带材负载设定为至少1.0m 3 / h m,特别是至少1.8m 3 / h m,优选至少3.0m 3 / h m。 可以以可接受的总成本将产品的醇含量降低至0.1至5重量%之间的任何值。

    Recovery of tocopherols
    4.
    发明授权
    Recovery of tocopherols 失效
    恢复生育酚

    公开(公告)号:US5646311A

    公开(公告)日:1997-07-08

    申请号:US654483

    申请日:1996-05-28

    摘要: Starting from a mixture containing tocopherol, fats and/or fat derivatives, more particularly fatty acids, and optionally sterol and/or sterol derivatives, the free fatty acids present in the mixture are esterified with an alcohol. The mixture is then transesterified with an alcohol in the presence of a basic catalyst. After the transesterification, the excess lower alcohol is distilled off from the reaction mixture. The transesterification catalyst and the glycerol present, if any, are removed and the fatty acid alkyl ester is distilled off from the mixture. Distillation of fatty acid alkyl esters can be accomplished with a packed column in sequence with a wiped film evaporator. The simultaneous recovery of tocopherol and sterol is possible. Tocopherols and sterols can be separated by the crystallization of sterols from a blend of organic solvents.

    摘要翻译: 从含有生育酚,脂肪和/或脂肪衍生物,更特别是脂肪酸和任选的固醇和/或固醇衍生物的混合物开始,混合物中存在的游离脂肪酸被醇酯化。 然后将混合物在碱性催化剂存在下用醇酯交换。 酯交换后,从反应混合物中蒸馏出多余的低级醇。 酯交换催化剂和存在的甘油(如果有的话)被除去,并从混合物中蒸出脂肪酸烷基酯。 脂肪酸烷基酯的蒸馏可以用填充柱依次用擦膜蒸发器完成。 生育酚和甾醇的同时回收是可能的。 生育酚和甾醇可以通过固醇与有机溶剂的混合物的结晶分离。

    Process for obtaining carotene from palm oil
    8.
    发明授权
    Process for obtaining carotene from palm oil 失效
    从棕榈油中获得胡萝卜素的方法

    公开(公告)号:US5902890A

    公开(公告)日:1999-05-11

    申请号:US913710

    申请日:1997-10-22

    CPC分类号: C07C403/24

    摘要: Carotene is recovered from a native fat or oil in five process steps in an economical industrial process. The native fat or oil is catalytically reacted in known manner with an alkanol containing up to 4 carbon atoms to form fatty acid alkyl ester and glycerol. The ester phase of the reaction mixture is subjected to distillation to remove the fatty acid alkyl ester. The distillation residue obtained in the second process step is saponified, carotene is extracted from the product obtained in the third process step and the extract phase is concentrated by evaporation. A yield of at least about 80% is achieved. At the same time, a fatty acid alkyl ester suitable for further processing to fatty alcohol is provided.

    摘要翻译: PCT No.PCT / EP96 / 01040 Sec。 371日期1997年10月22日第 102(e)日期1997年10月22日PCT 1996年3月11日PCT公布。 WO96 / 29306 PCT公开号 日期1996年9月26日在一个经济的工业过程中,五种工艺步骤中,从天然脂肪或油中回收了罗素。 天然脂肪或油以已知的方式与含有至多4个碳原子的链烷醇催化反应以形成脂肪酸烷基酯和甘油。 将反应混合物的酯相进行蒸馏除去脂肪酸烷基酯。 将第二工序中得到的蒸馏残渣皂化,从第三工序中得到的产物中提取胡萝卜素,蒸发浓缩萃取相。 达到至少约80%的产率。 同时,提供了适于进一步加工成脂肪醇的脂肪酸烷基酯。