Patent ID: 7790041
Filing Date: 2010-09-07
Classification: B01J,B65D,C02F,C08F,C08J

Abstract:
1. A process for reducing fluorosurfactant content of a fluorosurfactant-containing aqueous fluoropolymer dispersion stabilized with nonionic surfactant comprising: filling a shipping container with said fluorosurfactant-containing aqueous fluoropolymer dispersion, wherein said shipping container is a mobile vessel designed to hold fluoropolymer dispersion after polymerization and suitable for movement to a site remote from the polymerization area; contacting said fluorosurfactant-containing aqueous fluoropolymer dispersion with a fluorosurfactant sorbent in said shipping container to reduce fluorosurfactant content, wherein said sorbent is confined during said contacting by a porous confinement structure positioned within said shipping container, said porous confinement structure allowing said dispersion to permeate and contact said sorbent; and moving either said fluorosurfactant-containing aqueous fluoropolymer dispersion or said confinement structure to impart movement of said dispersion and sorbent in relation to each other during said contacting, wherein said contacting of said fluorosurfactant-containing aqueous fluoropolymer dispersion with a fluorosurfactant sorbent is performed for a contact time of about 1 week to about 6 months.