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US 2018/0002301 A1Published application
Purification of plasticizers
AssigneeArcher Daniels Midland Company
InventorNaveen SUNDHARSAN
Life of this patent
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Abstract
Plasticizers are purified by contact with a coalescing filter to effect removal of ions, metals, monohydric alcohols, and polyhydric alcohols. The resulting purified plasticizer compositions are suitable for use in PVC due to their low levels of impurities that reduce PVC utility.
Claims19
A process for purifying plasticizer compositions, comprising;
- contacting a plasticizer composition containing at least one impurity selected from the group consisting of ions, metals, monohydric alcohols, and polyhydric alcohols with a coalescing filter to effect phase separation into a phase enriched in impurities and a purified plasticizer effluent;
- wherein the content of at least one impurity is reduced in the purified plasticizer effluent phase.
A process for purifying epoxidized ester plasticizer compositions, comprising;
- contacting an epoxidized ester plasticizer composition containing at least one impurity selected from the group consisting of ions, metals, monohydric alcohol, and polyhydric alcohols with a coalescing filter to effect phase separation into a phase enriched in impurities and a purified effluent,
- wherein the content of at least one impurity is reduced in the purified epoxidized ester plasticizer effluent phase.
Dependencies are inferred from the claim text.