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An enrichment process using compounds useful in a polyester process

A compound and enrichment technology, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of increasing the manufacturing cost of PTA

Inactive Publication Date: 2008-05-21
GRUPO PETROTEMEX SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Purification of CTA to produce purified terephthalic acid (PTA) increases the manufacturing cost of PTA

Method used

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  • An enrichment process using compounds useful in a polyester process
  • An enrichment process using compounds useful in a polyester process
  • An enrichment process using compounds useful in a polyester process

Examples

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Embodiment Construction

[0672] An embodiment of the present invention can be further illustrated by the following examples of its preferred embodiments, but it should be understood that these examples are included for illustrative purposes only, and are not intended to limit its scope.

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Abstract

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 resulting compositions for removing catalyst from a carboxylic acid composition to produce a post catalyst removal composition.

Description

[0001] Cross references to related applications [0002] This application claims the priority of U.S. Provisional Application 60 / 682,768 (filed May 19, 2005), the entire content of which is incorporated herein by reference. Technical field [0003] The present invention relates to a method for forming an enriched carboxylic acid composition by contacting a carboxylic acid composition with an enriched feed in an enrichment zone and the enriched carboxylic acid composition formed thereby. The present invention also relates to a method for removing catalyst from a cooled carboxylic acid composition and the resulting composition. technical background [0004] Commercially, terephthalic acid is produced by oxidizing p-xylene in the presence of at least one catalyst (for example, Co, Mn, and Br catalyst) and a solvent (generally acetic acid). Terephthalic acid is generally prepared by removing impurities formed by the oxidation of p-xylene. [0005] Terephthalic acid (TPA) is an interme...

Claims

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Application Information

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IPC IPC(8): C07C51/42C07C63/26C07C63/24
Inventor K·R·帕克P·E·吉布森
Owner GRUPO PETROTEMEX SA