申请人:Kao Corporation
公开号:EP0980869A1
公开(公告)日:2000-02-23
An aluminum compounds represented by the following general formula (1):
Al(R1-SO3)l(R2)m(R3)n (1)
wherein R1 is a hydrocarbon group which may be substituted, R2 is a hydrocarbon group which may be substituted, an aliphatic hydrocarbonoxy group which may be substituted, or a halogen atom, R3 is an aromatic hydrocarbonoxy group which may be substituted, and l, m and n are independently a number of 0 to 3, with the proviso that l + m + n equals 3, and l is not 0, an acid catalyst comprising the aluminum compound, and a process for producing an ester, acetal, ketal, ether or alkyl glycoside making use of the catalyst.
The catalyst is suitable for use in a variety of acid-catalyzed reactions of alcohols, i.e., reactions with carbonyl compounds, such as esterification, transesterification, acetalization and ketalization, etherification, ring-opening reactions of epoxy compounds, etc. in addition to the above-described respective reactions, is not deactivated by alcoholysis, has a sufficient activity, can easily control a reaction catalyzed thereby and scarcely causes side reactions. Consequently, the use of the catalyst permits the production of the intended product at a high yield from starting materials used in an almost equimolar proportion.
由以下通式 (1) 代表的铝化合物:
Al(R1-SO3)l(R2)m(R3)n (1)
其中 R1 是可被取代的烃基;R2 是可被取代的烃基、可被取代的脂肪族烃氧基或卤素原子;R3 是可被取代的芳香族烃氧基;l、m 和 n 独立地为 0 至 3 的数字,但 l + m + n 等于 3,且 l 不为 0;包含该铝化合物的酸催化剂;以及利用该催化剂生产酯、缩醛、缩酮、醚或烷基糖苷的工艺。
该催化剂适用于醇类的各种酸催化反应,即与羰基化合物的反应,如酯化、酯交换反应、乙缩醛化和酮化、醚化、环氧化合物的开环反应等,此外还适用于上述各种反应,不会因醇解而失活,具有足够的活性,易于控制由此催化的反应,并且几乎不会引起副反应。因此,使用这种催化剂可以用几乎等摩尔比例的起始原料生产出高产率的预期产品。