Methods of preparing renewable butadiene and renewable isoprene

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 1/24 (2006.01) C08F 10/10 (2006.01) C08F 36/06 (2006.01) C08F 36/08 (2006.01) C07C 11/09 (2006.01) C07C 11/167 (2006.01) C07C 11/18 (2006.01)

Patent

CA 2753037

Isobutene, isoprene, and butadiene are obtained from mixtures of C4 and/or C5 olefins by dehydrogenation. The C4 and/or C5 olefins can be obtained by dehydration of C4 and C5 alcohols, for example, renewable C4 and C5 alcohols prepared from biomass by thermochemical or fermentation processes. Isoprene or butadiene can be polymerized to form polymers such as polyisoprene, polybutadiene, synthetic rubbers such as butyl rubber, etc. in addition, butadiene can be converted to monomers such as methyl methacrylate, adipic acid, adiponitrile, 1,4-butadiene, etc. which can then be polymerized to form nylons, polyesters, polymethyl-methacrylate etc.

Cette invention concerne de l'isobutène, de l'isoprène et du butadiène obtenus à partir de mélanges d'oléfines en C4 et/ou C5 par déshydrogénation. Les oléfines en C4 et/ou C5 peuvent être obtenues par déshydratation d'alcools en C4 et C5, par exemple, des alcools en C4 et C5 renouvelables préparés à partir de biomasse par des procédés thermochimiques ou des procédés de fermentation. L'isoprène ou le butadiène peuvent être polymérisés et former des polymères comme le polyisoprène, le polybutadiène, des caoutchoucs synthétiques comme le caoutchouc butyle. Par ailleurs, le butadiène peut être converti en monomères comme le méthacrylate de méthyle, l'acide adipique, l'adiponitrile, le 1,4-butadiène, qui peuvent ensuite être polymérisés pour former, notamment, des nylons, des polyesters, du polyméthacrylate de méthyle.

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