| Patent Number |
Title Of Patent |
Date Issued |
| 7601795 |
Process for production of a carboxylic acid/diol mixture suitable for use in polyester productio |
October 13, 2009 |
| The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a tereph |
| 7569722 |
Process for removal of benzoic acid from an oxidizer purge stream |
August 4, 2009 |
| A process is disclosed that relates to the removal of impurities, specifically benzoic acid, from a mother liquor produced in the synthesis of carboxylic acid, typically terephthalic acid. |
| 7557243 |
Enriched terephthalic acid composition |
July 7, 2009 |
| A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to a process and the |
| 7546747 |
Process for production of a dried carboxylic acid cake suitable for use in polyester production |
June 16, 2009 |
| The present invention relates to a process by which a dried carboxylic acid cake is obtained from a slurry or cake carboxylic acid product through the use of at least one counter current wash. More specifically, the present invention relates to a process by which a dried terephthalic |
| 7470370 |
Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using p |
December 30, 2008 |
| A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge stream through the u |
| 7462736 |
Methods and apparatus for isolating carboxylic acid |
December 9, 2008 |
| Disclosed are methods and apparatus for isolating a carboxylic acid. The processes employ a rotary pressure drum filter as a product isolation device in a carboxylic acid production process. The product isolation device is employed to isolate purified carboxylic acid particles from an |
| 7432395 |
Enriched carboxylic acid composition |
October 7, 2008 |
| A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to a process and the |
| 7402694 |
Process for removal of benzoic acid from an oxidizer purge stream |
July 22, 2008 |
| A process is disclosed that relates to the removal of impurities, specifically benzoic acid, from a mother liquor produced in the synthesis of carboxylic acid, typically terephthalic acid. |
| 7304178 |
Enriched isophthalic acid composition |
December 4, 2007 |
| A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to a process and the |
| 7291270 |
Process for removal of impurities from an oxidizer purge stream |
November 6, 2007 |
| A process is disclosed that relates to the removal of impurities and the recovery of a mother liquor and wash filtrate from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves the removal of impurities |
| 7282151 |
Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using p |
October 16, 2007 |
| A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge stream through the u |
| 7273559 |
Process for removal of impurities from an oxidizer purge stream |
September 25, 2007 |
| A process is disclosed that relates to the removal of impurities and the recovery of a mother liquor and wash filtrate from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves the removal of impurities |
| 7226986 |
Process for production of a carboxylic acid/diol mixture suitable for use in polyester productio |
June 5, 2007 |
| The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a carboxylic acid/solvent slurry without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic a |
| 7214760 |
Process for production of a carboxylic acid/diol mixture suitable for use in polyester productio |
May 8, 2007 |
| The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a tereph |
| 7193109 |
Process for production of a carboxylic acid/diol mixture suitable for use in polyester productio |
March 20, 2007 |
| The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a carboxylic acid/solvent slurry without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic a |
