초록 ▼

A method for processing a flowable nonaqueous, high viscosity dispersion which includes a product, where the product is a particulate material having a particle size between about 1.0 microns to about 200 microns, is disclosed. The flowable dispersion has a viscosity from about 10 cps to about 500 c

A method for processing a flowable nonaqueous, high viscosity dispersion which includes a product, where the product is a particulate material having a particle size between about 1.0 microns to about 200 microns, is disclosed. The flowable dispersion has a viscosity from about 10 cps to about 500 cps at 140°F. The method comprises cross flow filtering the dispersion through a porous nonmetallic inorganic filter having a pore size from about 0.5 to about 10 microns. The cross flow rate is in the range of from about 3.0 to about 9.0 feet/second (1 to 3 ml/sec) at least about 120°F. and preferably there is at least one backflush at a rate of about 2 to about 5 seconds for every 3 to about 5 minutes of cross flow filtration.

대표청구항 ▼

A method of littering a nonaqueous dispersion of a polymer selected from the group consisting of an alkyd polymer selected rom the group consisting of an alkyd polymer, a urethane polymer, a polyester polymer and mixtures thereof, the method comprising cross flow filtering at a cross flow rate in th

A method of littering a nonaqueous dispersion of a polymer selected from the group consisting of an alkyd polymer selected rom the group consisting of an alkyd polymer, a urethane polymer, a polyester polymer and mixtures thereof, the method comprising cross flow filtering at a cross flow rate in the range of from about 3.0 to 9.0 feet per second through a porous nonmetallic inorganic filter having a pore size in the range of from about 0.5 to about 10 microns, at a temperature in the range of from about 120°F. to about 200°F., the dispersion having a viscosity in e range of from about 10 cps to about 500 cps at about 140°F., the dispersion comprising particulates of the polymer having a size n the range of from bout one micron to about 200 microns, the method providing a recovery in a filtrate of at least about 95 weight percent of the polymer based upon the weight of the polymer dispersion flowing to the ceramic filter.