Removal of residual sulfur compounds from a caustic stream

Details Removal of residual sulfur compounds from a caustic stream Removal of residual sulfur compounds from a caustic stream

2011-01-25

2011-01-25

Savage, Matthew O (Department: 1776)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S671000, C210S694000, C210S763000, C208S235000

Reexamination Certificate

active

07875185

ABSTRACT:
A process for the removal of residual sulfur compounds from a liquid caustic stream is disclosed. One embodiment of my invention adsorbs disulfides from a caustic stream using an activated carbon adsorbent while another combines both oxidation and adsorption in single step to remove residual sulfur compounds from a rich caustic stream using metal phthalocyanine supported on a solid adsorbent. This process is especially useful as a polishing step in a caustic regeneration process flow scheme.

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