PROCESS FOR CO-PRODUCING OLEFINS AND DIESTERS OR DIACIDS STARTING FROM UNSATURATED FATS
申请人:Olivier-Bourbigou Helene
公开号:US20070179307A1
公开(公告)日:2007-08-02
In order to produce both an olefinic fraction and a composition of diacids or diesters of fats, a process is carried out which comprises, in succession: a) metathesis of an unsaturated fat with ethylene in the presence of at least one non-aqueous ionic liquid; b) separating and recycling the ionic liquid used in the first step; c) separating, by distillation, the olefinic fraction (fraction A) from the unsaturated fat mono-ester or mono-basic acid fraction (fraction B) formed in step a); d) homometathesis of the mono-unsaturated fat ester or acid cut (fraction B) which allows the co-production of unsaturated fat diesters or diacids (fraction C) and ethylene which is recycled to the first methathesis step of the process; and e) optionally, recycling the ionic liquid containing the catalyst used in step d).
Of particular application to an oleic sunflower oil, an oleic rapeseed oil or to a mixture of mono-alcohol esters of said oils, whereupon the process can produce both an olefinic fraction (mainly composed of 1-decene) and a composition of diesters or diacids wherein, in general, over half of the chains is constituted by unsaturated C
18
chains (mainly composed of octadecene-9 1,18-diacid or diester) and to recycle the ethylene employed.
为了生产烯烃组分和脂肪二酸或二酯的组合物,进行了一种过程,包括以下步骤:a) 在至少一种非水离子液体存在下用乙烯与不饱和脂肪进行交换反应;b) 分离和回收第一步中使用的离子液体;c) 通过蒸馏将烯烃组分(A组分)与在步骤a)中形成的不饱和脂肪单酯或单酸组分(B组分)分离;d) 对单不饱和脂肪酯或酸切割(B组分)进行同核交换反应,从而共同生产不饱和脂肪二酯或二酸(C组分)和回收到该过程的第一交换反应步骤的乙烯;e) 可选地,回收包含在步骤d)中使用的催化剂的离子液体。特别适用于油酸向日葵油、油酸油菜籽油或这些油的单醇酯混合物,该过程可以生产烯烃组分(主要由1-癸烯组成)和一种由二酯或二酸组成的组合物,在这些组合物中,一般来说,超过一半的链由不饱和C18链组成(主要由十八烯-9 1,18-二酸或二酯组成),并且回收所使用的乙烯。