US Patent 7238260 Purification of N-(2-hydroxyethyl)-2-pyrrolidone
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Patent abstract
N-(2-hydroxyethyl)-2-pyrrolidone (HEP) is purified by a distillation sequence in which the purified HEP is recovered as a side stream without being separated as an overhead at any point in the procedure.
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US Patent 07238260 Purification of N-(2-hydroxyethyl)-2-pyrrolidone US Patent 7238260 Purification of N-(2-hydroxyethyl)-2-pyrrolidone
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Patent Number
0723826000
Patent Number
723826000
Edits on 22 Mar, 2023
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Infobox
Is a
Patent Jurisdiction
Patent Number
072382600
Date of Patent
July 3, 2007
0Patent Application Number
109731510
Date Filed
October 26, 2004
0Official Website
Patent Primary Examiner
Edits on 27 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072382600
Date of Patent
July 3, 2007
0Patent Application Number
109731510
Date Filed
October 26, 2004
0Official Website
Patent Primary Examiner
Edits on 15 Jun, 2022
Golden AI
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US Patent 07238260 Purification of N-(2-hydroxyethyl)-2-pyrrolidone
Infobox
Is a
Patent jurisdiction
Patent number
07238260
Date of patent
July 3, 2007
Patent application number
10973151
Date Filed
October 26, 2004
Patent primary examiner
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