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PROCESSES FOR PURIFYING ACETIC ACID AND HYDRATING ANHYDRIDE
专利权人:
发明人:
SHAVER RONALD D,LIU YAW HWA,SCATES MARK O
申请号:
IN201847017214
公开号:
IN201847017214A
申请日:
2018.05.08
申请国别(地区):
IN
年份:
2018
代理人:
摘要:
Processes for purifying acetic acid by distilling a process in a column in which acetic anhydride is formed in the lower portion of the column. The product stream withdrawn from the column comprises acetic acid, water at a concentration of no more than 0.2 wt.%, and acetic anhydride at a concentration of no more than 600 wppm. The process further comprises hydrating the acetic anhydride in the product stream to form a purified acetic acid product comprising acetic anhydride at a concentration of no more than 50 wppm.
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