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1. WO2013012833 - IMPROVED PRODUCT RECOVERY PROCESS IN THE FILTRATION OF POLYETHER POLYOLS

Publication Number WO/2013/012833
Publication Date 24.01.2013
International Application No. PCT/US2012/046998
International Filing Date 17.07.2012
IPC
C08G 65/20 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
65Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02from cyclic ethers by opening of the heterocyclic ring
04from cyclic ethers only
06Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
16Cyclic ethers having four or more ring atoms
20Tetrahydrofuran
C07C 41/34 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
34Separation; Purification; Stabilisation; Use of additives
C08G 65/30 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
65Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02from cyclic ethers by opening of the heterocyclic ring
30Post-polymerisation treatment, e.g. recovery, purification, drying
CPC
C07C 41/34
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
34Separation; Purification; Stabilisation; Use of additives
C07C 41/46
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
34Separation; Purification; Stabilisation; Use of additives
46Use of additives, e.g. for stabilisation
C08G 65/20
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
65Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02from cyclic ethers by opening of the heterocyclic ring
04from cyclic ethers only
06Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
16Cyclic ethers having four or more ring atoms
20Tetrahydrofuran
C08G 65/30
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
65Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
02from cyclic ethers by opening of the heterocyclic ring
30Post-polymerisation treatment, e.g. recovery, purification, drying
Applicants
  • INVISTA TECHNOLOGIES S. A. R. L. [LU]/[CH] (AllExceptUS)
  • OSBORNE, Robert, B. [US]/[US] (UsOnly)
  • QUON, Willard, L. [US]/[US] (UsOnly)
Inventors
  • OSBORNE, Robert, B.
  • QUON, Willard, L.
Agents
  • FURR, Robert, B.
Priority Data
201110333661.228.10.2011CN
61/509,49919.07.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVED PRODUCT RECOVERY PROCESS IN THE FILTRATION OF POLYETHER POLYOLS
(FR) PROCÉDÉ PERFECTIONNÉ DE RÉCUPÉRATION DE PRODUIT DANS LA FILTRATION DE POLYÉTHER POLYOLS
Abstract
(EN)
An improved method for recovering a purified polyether polyol comprising the steps of providing an aqueous solution of a polyether polyol containing an alkali metal catalyst residual formed from a transesterification process, contacting the aqueous solution with a stoichiometric excess of magnesium sulfate to form a second aqueous solution, removing water from said second aqueous solution at a temperature above the melt temperature of said polyether polyol to produce a dehydrated slurry containing a molten polyether polyol phase essentially free of residual alkali metal and a precipitated solid phase comprising sulfate and/or sulfite salts of the alkali metal catalyst, magnesium hydroxide, and excess magnesium sulfate and/or sulfide, passing the dehydrated slurry of through a filtration system comprising a filtration press to separate the molten polyether polyol phase from the precipitated solid phase, wherein the filtration press is treated with a filter aid that is essentially free of transition metal oxide content, separating the molten polyether polyol phase substantially free of water, residual alkali metal catalyst and transition metal contaminants from the precipitated solid phase and recovering polyether polyol from the separated polyether polyol phase.
(FR)
L'invention concerne un procédé perfectionné pour récupérer un polyéther polyol purifié. Ce procédé comprend les étapes consistant à se procurer une solution aqueuse d'un polyéther polyol contenant un résidu de catalyseur à base de métal alcalin formé par un procédé de transestérification, à mettre en contact la solution aqueuse avec un excès stœchiométrique de sulfate de magnésium pour former une seconde solution aqueuse, à éliminer l'eau de ladite seconde solution aqueuse à une température se situant au-dessus de la température de fusion dudit polyéther polyol afin de produire une bouillie déshydratée contenant une phase fondue de polyéther polyol, sensiblement exempte de métal alcalin résiduel et une phase solide ayant précipité comprenant des sels sulfates et/ou sulfites du catalyseur à base de métal alcalin, de l'hydroxyde de magnésium et sulfate et/ou sulfure de magnésium en excès, à faire passer la bouillie déshydratée à travers un système de filtration comprenant un filtre-presse pour séparer la phase fondue de polyéther polyol de la phase solide ayant précipité, le filtre-presse étant traité par un adjuvant de filtration qui est sensiblement exempt d'une teneur en oxyde de métal de transition, à séparer la phase fondue de polyéther polyol sensiblement exempte d'eau, de catalyseur à base de métal alcalin résiduel et de contaminants à base de métaux de transition à partir de la phase solide ayant précipité, et à récupérer le polyéther polyol à partir de la phase séparée de polyéther polyol séparée.
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