Process for preparing a halogenated polymer and device for the implementation thereof
Номер патента: EP2513168A1
Опубликовано: 24-10-2012
Автор(ы): Ivan Claeys, Manuel De Francisco
Принадлежит: SOLVAY SA
Опубликовано: 24-10-2012
Автор(ы): Ivan Claeys, Manuel De Francisco
Принадлежит: SOLVAY SA
Реферат: Continuous process for preparing a halogenated polymer comprising a step of polymerization of at least one halogenated monomer in a medium comprising carbon dioxide in the liquid or supercritical state (L/SC-CO 2 ), in at least one pressurized reactor, said process comprising at least: - (1) an expansion of the suspension resulting from the reactor; - (2) a separation of the expanded suspension resulting from the reactor into a first stream, containing the solid phase comprising the halogenated polymer and into a liquid, gaseous or supercritical second stream, which is a mixture of CO 2 and of monomer not converted to polymer; and the recovery of this first stream and of this second stream; - (3) an optional reheating, applied to the expanded suspension, before or after its separation into first and second streams, with optional recovery of the cold energy generated by the expansion; - (4) a recompression of the second stream and the optional cooling thereof in order to recycle it to the reactor feed, with a fresh monomer make-up and, possibly, a CO 2 make-up; - a final step (5) of degassing the halogenated polymer, combined with a continuous technique of forming the polymer into granules. Device for implementing the process.
PROCESS FOR PREPARATION BY MASS, IN TWO PHASES, OF POLYMERS AND COPOLYMERS BASED ON VINYL CHLORIDE WITH LOW COARSE CONTENT
Номер патента: FR2402669A1. Автор: Salomon Soussan,Francois Erard. Владелец: Rhone Poulenc Industries SA. Дата публикации: 1979-04-06.