Process for Isolating Crystallized 2,2,4,4-Tetramethyl-1,3-Cyclobutanediol (TMCD) Particles Utilizing Pressure Filtration
AssigneeEastman Chemical Company
InventorsKenny Randolph Parker, Craig Alan Hoyme
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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
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 100 is defined as a rotary pressure drum filter.
2) 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;
- (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.
3) 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.
- (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 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.
4) 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.
5) 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.
Dependencies are inferred from the claim text.