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US 2007/0179312 A1Published application
Process for the purification of a crude carboxylic axid slurry
OwnerRuairi Seosamh O'Meadhra, Robert Lininventors
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Abstract
Disclosed is a process to produce a purified carboxylic acid product. The process comprises removing impurities from a crude carboxylic acid slurry in a solid-liquid displacement zone to form a slurry product. The slurry product if further treated in a staged oxidation zone.
Claims25
A process to produce a purified carboxylic acid product comprising:
- (a) oxidizing an aromatic feed stock in a primary oxidation zone to form a crude carboxylic acid slurry;
- wherein said crude carboxylic acid slurry comprises terephthalic acid;
- (b) removing in a solid-liquid displacement zone impurities from said crude carboxylic acid slurry to form a slurry product;
- and
- (c) oxidizing said slurry product in a staged oxidation zone to form a staged oxidation product;
- wherein said oxidizing in said staged oxidation zone is conducted at a temperature between about 150° C. to about 185° C.
3 more elements
A process to produce a purified carboxylic acid product comprising:
- (a) oxidizing an aromatic feed stock in a primary oxidation zone to form a crude carboxylic acid slurry;
- wherein said crude carboxylic acid slurry comprises terephthalic acid;
- and
- (b) oxidizing said crude carboxylic acid slurry in a staged oxidation zone to form a staged oxidation product;
- wherein said oxidizing in said staged oxidation zone is conducted at a temperature between about 150° C. to about 175° C.
2 more elements
Dependencies are inferred from the claim text.