Process for co-producing olefins and diesters or diacids...

Details Process for co-producing olefins and diesters or diacids... Process for co-producing olefins and diesters or diacids...

2011-03-15

2011-03-15

Carr, Deborah D (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Fatty compounds having an acid moiety which contains the...

C560S190000

Reexamination Certificate

active

07906663

ABSTRACT:
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; ande) 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 C18chains (mainly composed of octadecene-9 1,18-iacid or diester) and to recycle the ethylene employed.

REFERENCES:
patent: 6756500 (2004-06-01), Gurtler et al.
patent: 7678932 (2010-03-01), Thurier et al.
patent: 1 698 686 (2006-09-01), None
Olivier-Bourbigou H et al., Ionic Liquids: Perspectives for Organic and Catalytic Reactions, Journal of Molecular Catalysis, 2002, pp. 419-437.
Warwell S. et al., Polymers and Surfactants on the Basis of Renewable Resources, Chemosphere, 2001, pp. 39-48, vol. 43.

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