PROCESS FOR PRODUCING POLYETHER POLYOL COMPOUND
A process for stably producing a polyether polyol compound by converting a diester of a polyether polyol to a polyether polyol compound while inhibiting deposition on the inner wall of the reactor. The process for polyether polyol compound production comprises conducting the alcoholysis reaction of...
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Format | Patent |
Language | English French Japanese |
Published |
21.09.2006
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Abstract | A process for stably producing a polyether polyol compound by converting a diester of a polyether polyol to a polyether polyol compound while inhibiting deposition on the inner wall of the reactor. The process for polyether polyol compound production comprises conducting the alcoholysis reaction of a diester of a polyether polyol with a C1-4 alkanol in the presence of an alkali-metal alkoxide catalyst to convert the diester into a polyether polyol compound, and is characterized in that the C1-4 alkanol contained in the polyether polyol compound yielded is returned to the reaction system while keeping the water content in the alkanol at 100 ppm or lower.
La présente invention concerne un procédé permettant de produire de façon stable un composé polyéther-polyol en convertissant un diester d'un polyéther-polyol en composé polyéther-polyol, tout en empêchant le dépôt sur la paroi interne du réacteur. Ledit procédé comprend l'étape consistant à alcoolyser un diester d'un polyéther-polyol au moyen d'un alcanol en C1 à C4, en présence d'un catalyseur alcoxyde-métal-alcali, afin de convertir le diester en un composé polyéther-polyol, et il est caractérisé en ce que l'alcanol en C1 à C4 présent dans le composé polyéther-polyol produit est recyclé dans le système réactionnel, tout en maintenant la teneur en eau de l'alcanol à 100 ppm ou moins. |
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AbstractList | A process for stably producing a polyether polyol compound by converting a diester of a polyether polyol to a polyether polyol compound while inhibiting deposition on the inner wall of the reactor. The process for polyether polyol compound production comprises conducting the alcoholysis reaction of a diester of a polyether polyol with a C1-4 alkanol in the presence of an alkali-metal alkoxide catalyst to convert the diester into a polyether polyol compound, and is characterized in that the C1-4 alkanol contained in the polyether polyol compound yielded is returned to the reaction system while keeping the water content in the alkanol at 100 ppm or lower.
La présente invention concerne un procédé permettant de produire de façon stable un composé polyéther-polyol en convertissant un diester d'un polyéther-polyol en composé polyéther-polyol, tout en empêchant le dépôt sur la paroi interne du réacteur. Ledit procédé comprend l'étape consistant à alcoolyser un diester d'un polyéther-polyol au moyen d'un alcanol en C1 à C4, en présence d'un catalyseur alcoxyde-métal-alcali, afin de convertir le diester en un composé polyéther-polyol, et il est caractérisé en ce que l'alcanol en C1 à C4 présent dans le composé polyéther-polyol produit est recyclé dans le système réactionnel, tout en maintenant la teneur en eau de l'alcanol à 100 ppm ou moins. |
Author | TAKEO, HIROSHI |
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DocumentTitleAlternate | PROCEDE DE PRODUCTION D'UN COMPOSE POLYETHER-POLYOL |
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RelatedCompanies | TAKEO, HIROSHI MITSUBISHI CHEMICAL CORPORATION |
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Snippet | A process for stably producing a polyether polyol compound by converting a diester of a polyether polyol to a polyether polyol compound while inhibiting... |
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SubjectTerms | CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP |
Title | PROCESS FOR PRODUCING POLYETHER POLYOL COMPOUND |
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