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US 7,888,529 B2Granted
Process to produce a post catalyst removal composition
AssigneeEastman Chemical Company
InventorsKenny Randolph Parker, Philip Edward Gibson
Life of this patent
Estimating the term…
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.
Claims26
A process comprising contacting a cooled carboxylic acid composition produced in a terephthalic acid production process, a wash feed comprising water and/or acetic acid;
- and an enrichment feed in a catalyst removal zone to form a post catalyst removal composition, and a catalyst rich liquor comprising cobalt, acetic acid and water;
- wherein said post catalyst removal composition has a catalyst composition of less than 500 ppm;
- wherein the residence time of said catalyst removal zone is less than 10 seconds;
- wherein said cooled carboxylic acid composition comprises IPA (isophthalic acid) in an amount ranging from 50 ppm to about 5000 ppm by weight on a dry solid basis comprises;
- wherein said enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, phthalic acid, benzene-tricarboxylic acid isomers, hydroxybenzoic acid isomers, hydroxymethylbenzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxybenzophenone isomers, dicarboxybenzil isomers, form-acet-hydroxybenzoic acid isomers, acet-hydroxymethylbenzoic acid isomers, and phthaldehyde isomers.
2 more elements
A process comprising:
- (a) oxidizing an aromatic feedstock comprising para-xylene in a primary oxidation zone to form a crude carboxylic acid composition;
- (b) optionally, subjecting said crude carboxylic acid composition to a liquid displacement zone to form a slurry composition;
- (c) crystallizing said slurry composition or said crude carboxylic acid composition in a crystallization zone to form a crystallized slurry composition;
- (d) cooling and optionally enriching said crystallized slurry composition in a cooling zone to form a cooled carboxylic acid composition;
- (e) contacting said cooled carboxylic acid composition, a wash feed comprising water and/or acetic acid;
- and an enrichment feed in a catalyst removal zone to form a post catalyst removal composition, and a catalyst rich liquor comprising cobalt, acetic acid and water;
- wherein said post catalyst removal composition has a catalyst composition of less than 500 ppm;
- wherein said cooled carboxylic acid composition comprises IPA in an amount ranging from 150 ppm to about 2000 ppm by weight on a dry solid basis;
- wherein said enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, phthalic acid, benzene-tricarboxylic acid isomers, hydroxybenzoic acid isomers, hydroxymethylbenzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxybenzophenone isomers, dicarboxybenzil isomers, form-acet-hydroxybenzoic acid isomers, acet-hydroxymethylbenzoic acid isomers, and phthaldehyde isomers.
6 more elements
A process comprising:
- (a) oxidizing an aromatic feedstock comprising para-xylene in a primary oxidation zone to form a crude carboxylic acid composition;
- (b) optionally subjecting said crude carboxylic acid composition to a liquid displacement zone to form a slurry composition;
- (c) oxidizing said slurry composition or said crude carboxylic acid composition in a staged oxidation zone to form a stage oxidation composition;
- (d) cooling and optionally enriching said crystallized slurry composition in a cooling zone to form a cooled carboxylic acid composition;
- (e) contacting said cooled carboxylic acid composition, a wash feed comprising water and/or acetic acid;
- and an enrichment feed in a catalyst removal zone to form a post catalyst removal composition, and a catalyst rich liquor comprising cobalt, acetic acid and water;
- wherein said post catalyst removal composition has a catalyst composition of less than 500 ppm;
- wherein said cooled carboxylic acid composition comprises IPA in an amount ranging from 50 ppm to about 5000 ppm by weight on a dry solid basis;
- wherein said enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, phthalic acid, benzene-tricarboxylic acid isomers, hydroxybenzoic acid isomers, hydroxymethylbenzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxybenzophenone isomers, dicarboxybenzil isomers, form-acet-hydroxybenzoic acid isomers, acet-hydroxymethylbenzoic acid isomers, and phthaldehyde isomers.
6 more elements
A process comprising:
- (a) oxidizing an aromatic feedstock comprising para-xylene in a primary oxidation zone to form a crude carboxylic acid composition;
- (b) optionally subjecting said crude carboxylic acid composition to a liquid displacement zone to form a slurry composition;
- (c) cooling and optionally enriching said crude carboxylic acid composition or said slurry composition to form a cooled carboxylic acid composition;
- (d) contacting said cooled carboxylic acid composition, a wash feed comprising water and/or acetic acid;
- and an enrichment feed in a catalyst removal zone to form a post catalyst removal composition, and a catalyst rich liquor comprising cobalt, acetic acid and water;
- wherein said post catalyst removal composition has a catalyst composition of less than 500 ppm;
- wherein said cooled carboxylic acid composition comprises IPA in an amount ranging from 50 ppm to about 5000 ppm by weight on a dry solid basis;
- wherein said enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, phthalic acid, benzene-tricarboxylic acid isomers, hydroxybenzoic acid isomers, hydroxymethylbenzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxybenzophenone isomers, dicarboxybenzil isomers, form-acet-hydroxybenzoic acid isomers, acet-hydroxymethylbenzoic acid isomers, and phthaldehyde isomers.
5 more elements
Dependencies are inferred from the claim text.