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US 9,024,080 B2Granted
Process for isolating crystallized 2,2,4,4 tetramethyl-1,3-cyclobutanediol (TMCD) particles utilizing pressure filtration
AssigneeEastman Chemical Company
InventorsKenny Parker, Craig Hoyme
Life of this patent
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Abstract
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.
Claims5
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.
A process for isolating crystallized 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) particles comprising:
- (a) introducing an isolation feed slurry comprising the TMCD particles and a liquid phase into a product isolation zone;
- wherein the product isolation zone comprises a rotary pressure drum filter having a wash ratio ranging from 0.4 to 5.0;
- (b) removing at least a portion of the liquid phase to produce an isolated TMCD product wet cake and a mother liquor stream;
- and
- (c) routing at least a portion of the mother liquor to a solvent recovery zone 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.
3 more elements
A process for isolating crystallized 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) particles comprising:
- (a) introducing an isolation feed slurry comprising the TMCD particles and a liquid phase into a product isolation zone;
- wherein the product isolation zone comprises a rotary pressure drum filter having a wash ratio ranging from 0.4 to 5.0;
- (b) removing at least a portion of the liquid phase to thereby produce an isolated TMCD product wet cake and a mother liquor stream;
- and
- (c) routing at least a portion of the mother liquor stream to a solvent recovery zone to generate a recycle mother liquor stream and TMCD reaction by-product impurity rich stream enriched in TMCD reaction by-products, and
- (d) routing at least a portion of TMCD reaction by-product impurity rich stream enriched with TMCD reaction by-products to a purge zone;
- and 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.
5 more elements
A process for isolating crystallized 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) particles comprising:
- (a) introducing an isolation feed slurry comprising the TMCD particles and a liquid phase into a product isolation zone;
- (b) removing at least a portion of the liquid phase to thereby produce an isolated TMCD product wet cake and a mother liquor stream;
- and
- (c) routing at least a portion of the isolated TMCD product wet cake to a dryer;
- and
- (d) routing at least a portion of the mother liquor stream to a solvent recovery zone to generate a recycle mother liquor stream and a TMCD reaction by-product impurity rich stream enriched in TMCD reaction by-products, and
- (e) routing at least a portion of the TMCD reaction by-product impurity rich stream enriched with TMCD reaction by-products to purge zone, wherein the product isolation zone comprises a rotary pressure drum filter having a wash ratio 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.
6 more elements
A process for isolating crystallized 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) particles comprising:
- (a) introducing an isolation feed slurry comprising the TMCD particles and a liquid phase into a product isolation zone;
- (b) removing at least a portion of the liquid phase to thereby produce an isolated TMCD product wet cake and a mother liquor stream;
- and
- (c) routing at least a portion of the isolated TMCD wet cake to a dryer;
- (d) routing at least a portion of the mother liquor stream to a solvent recovery zone to generate a recycle mother liquor stream and TMCD reaction by-product impurity rich stream enriched in TMCD reaction by products, and
- (e) routing at least a portion of the mother liquor stream to a purge zone, wherein the product isolation zone is defined within a rotary pressure drum filter having a wash ratio 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.
5 more elements
Dependencies are inferred from the claim text.