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公开(公告)号：US3825512A
公开(公告)日：1974-07-23
申请号：US28817672
申请日：1972-09-11
CPC分类号： B01J19/26 , B01J19/0013 , B01J2219/00101 , B01J2219/00108 , C08F14/06 , C08F2/16
摘要： FFIG-01 THIS INVENTION PROVIDE AN IMPROVED PROCESS FOR POLYMERIZING VINYL CHLORIDE IN AN AQUEOUS MEDIUM USING A REFLUX CONDENSER. THE IMPROVEMENT COMPRISES (1) DURING THE CONDENSATION PERIOD SPRAYING A COATING OF WATER ON THE INNER SURFACES OF THE COMDENSER TO INHIBIT THE FORMATION THEREON OF POLYMERIZED VINYL CHLORIDE PARTICLES, AND (2) SPRAYING WATER IN THE PATHOF AND IN A DIRECTION COUNTER-CURRENT TO THE FLOW OF VINYL CHLORIDE VAPORR AS IT PROGRESSES FROM THE REACTOR TO WITHIN THE CONDENSER THEREBY TO ASSIST IN CONDENSING THE VINYL CHLORIDE FOR RETURN TO THE REACTOR. THE SPRAY MAY INCLUDE A DEFOAMER TO REDUCER THE TENDENCY OF CARRYOVER OF POLYMER INTO THE CONDENSER TUBES.
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2.发明授权Method of reducing polymerization of vinyl chloride in a monomer recovery system 失效在单体恢复系统中降低氯乙烯聚合的方法
公开(公告)号：US3808184A
公开(公告)日：1974-04-30
申请号：US26285072
申请日：1972-06-14
申请人： UNIVERSAL PVC RESINS
发明人： REITER W , SHETH K , STALLINGS J
CPC分类号： C08J11/02
摘要： IN THE POLYMERIZATION OF VINYL CHLORIDE, UNREACTED MONOMER RECOVERED AFTER POLYMERIZATION IS PREVENTED FROM POLYMERIZING IN THE RECOVERY SYSTEM BY A NONTOXIC, WATER-MISCIBLE, VINYL CHLORIDE-IMMISCIBLE POLYMERIZATION INHIBITOR HAVING A HIGH BOILING POINT, SUCH AS TRIETHANOL AMINE, ADDED TO THE UNREACTED MONOMER IN THE RECOVERY SYSTEM.
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公开(公告)号：US3778423A
公开(公告)日：1973-12-11
申请号：US3778423D
申请日：1971-06-28
申请人： UNIVERSAL PVC RESINS
发明人： REITER W
CPC分类号： C08F2/004
摘要： IN THE POLYMERIZATION OF VINYL CHLORIDE IN THE PRESENCE OF AN OIL-SOLUBLE POLYMERIZATION INITIATOR, ADHESION OF VINYL CHLORIDE POLYMER TO THE INTERIOR SURFACE OF THE POLYMERIZATION VESSEL IS SUBSTANTIALLY REDUCED BY COATING THE SURFACE, PRIOR TO POLYMERIZATION, WITH A FREE RADICAL INHIBITOR.
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