PROCESS FOR ISOLATING CRYSTALLIZED 2,2,4,4 TETRAMETHYL-1,3-CYCLOBUTANEDIOL (TMCD) PARTICLES UTILIZING PRESSURE FILTRATION

摘要

A method for isolating 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) solids from an isolated feed slurry formed in a TMCD process comprising TMCD, a liquid phase, and impurities by (a) treating the isolated feed slurry in a product isolation zone to produce an isolated TMCD product wet cake, a mother liquor, and impurities; wherein the product isolation zone can comprise at least one rotary pressure drum filter.

主权项

1. A process for isolating crystallized 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) particles comprising:
treating an isolation feed slurry comprising the 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) particles in a product isolation zone to produce an isolated TMCD product wet cake comprising the 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) in an amount of at least 65 weight percent, wherein the product isolation zone is defined as a rotary pressure drum filter having a wash ratio ranging from 0.4 to 5.0; wherein said TMCD particles comprise 5% to 45% weight percent solids in the feed slurry; and wherein said feed slurry have a mean particle size ranging from less than 50 microns to about 600 microns.