METHOD FOR COATING SCALE ADHESION PREVENTING AGENT

• Main Authors: SUZUKI TERUYUKI, TANAKA TAKAAKI
• Format: Patent
• Language: English
• Published: 27.07.2006
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method for preventing scale adhesion on the inner surfaces of a polymerization reactor that enables the long-term continuous operation in the polymerization of olefinic monomers, particularly vinyl chloride. SOLUTION: (1) A scale adhesion preventing agent is sprayed in the polymerization reactor under stirring to cause a rise flow along the inner wall of the reactor vessel and a fall flow in the central part of the reactor so that the scale adhesion preventing agent may be circulated whereby the preventing agent is coated on the inside surface of the reactor. (2) In the coating method for the scale adhesion preventing agent, the agitation of the preventing agent is carried out by means of the stirring machine of the polymerization reactor. COPYRIGHT: (C)2006,JPO&NCIPI