Solid-liquid separation processes using a large pore filter
AssigneeIneos US Chemicals Company
InventorsTimothy H. Keyes, Anders Bitsch-Larsen
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Abstract
Solid/liquid separation processes using a large pore filter. One aspect of the disclosure is a process comprising filtering a solid/liquid mixture of a collection of solid aromatic carboxylic acid particles in a solvent in a first zone of a rotary pressure filter apparatus to form a filter cake on a filter surface, and removing the filter cake from the filter surface.
Claims17
A process for recovering a solid aromatic carboxylic acid from a solid/liquid mixture of the solid aromatic carboxylic acid in a solvent, the solid aromatic carboxylic acid comprising terephthalic acid or isophthalic acid and being in the form of a collection of particles having a distribution of particle sizes having a median particle size, the method comprising:
- filtering the solid/liquid mixture to form a filter cake on a filter surface, the filter cake comprising the solid aromatic carboxylic acid;
- and
- removing the filter cake from the filter surface;
- wherein the average pore size of the filter surface is greater than the median particle size of the collection of particles, and further wherein
- the median particle size of the collection of particles is at least 50% and less than 95% of the average pore size of the filter surface;
- and
- the median particle size of the collection of particles is within the range of 80 μm to 200 μm.
Dependencies are inferred from the claim text.