Method of producing polytetrahydrofurane

C - Chemistry – Metallurgy – 08 – G

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C08G 65/20 (2006.01) B01J 23/24 (2006.01) C08G 65/10 (2006.01) C08G 65/26 (2006.01)

Patent

CA 2199644

A method is disclosed of producing polytetrahydrofurane or polytetrahydrofurane monoesters of C1-C10 monocarboxylic acids by polymerisation of tetrahydrofurane on a heterogenous catalyst in the presence of one of the following telogens: water, 1.4-butane diol, polytetrahydrofurane with a molecular weight of 200-700 Da, a C1-C10 monocarboxylic acid, or mixtures of these telogens. The catalyst used is a carrier catalyst which contains a catalytically active quantity of an oxygen-containing tungsten or molybdenum compound or mixtures of such compounds on an oxide carrier material and has undergone calcination at temperatures of 500-1000 ~C after the precursors of the oxygen-containing molybdenum and/or tungsten compounds have been deposited on the carrier material precursor.

L'invention concerne un procédé de fabrication de polytétrahydrofurane ou de monoesters de polytétrahydrofurane d'acides monocarboxyliques C¿1?-C¿10? par polymérisation de tétrahydrofurane sur un catalyseur hétérogène en présence d'un des télogènes suivants: eau, 1,4 butanediol ou polytétrahydrofurane d'un poids moléculaire compris entre 200 et 700 daltons, ou d'un acide monocarboxylique C¿1?-C¿10? ou de mélanges de ces télogènes. Ledit procédé consiste à utiliser comme catalyseur un catalyseur à support contenant sur un support oxydique une proportion active, sur le plan catalytique, d'un composé de tungstène ou de molybdène contenant de l'oxygène ou de mélanges de ces composés. Ce catalyseur est calciné à des températures comprises entre 500 et 1000 ~C, après dépôt de précurseurs des composés de tungstène et/ou de molybdène contenant de l'oxygène, sur le précurseur du support

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