Invention Application
- Patent Title: PROCESS FOR PRODUCING GLYCOLIC ACID FROM FORMALDEHYDE AND HYDROGEN CYANIDE
- Patent Title (中): 从甲醛和氢氰酸生产甘油酸的方法
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Application No.: PCT/US2005/046273Application Date: 2005-12-21
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Publication No.: WO2006069114A2Publication Date: 2006-06-29
- Inventor: DICOSIMO, Robert , FOO, Thomas , PAYNE, Mark, S. , PANOVA, Anna , O'KEEFE, Daniel, P. , THOMPSON, Jeffrey, Scott , GALLAGHER, F., Glenn , LI, Xu
- Applicant: E.I. DUPONT DE NEMOURS AND COMPANY , DICOSIMO, Robert , FOO, Thomas , PAYNE, Mark, S. , PANOVA, Anna , O'KEEFE, Daniel, P. , THOMPSON, Jeffrey, Scott , GALLAGHER, F., Glenn , LI, Xu
- Applicant Address: 1007 Market Street, Wilmington, Delaware 19898 US
- Assignee: E.I. DUPONT DE NEMOURS AND COMPANY,DICOSIMO, Robert,FOO, Thomas,PAYNE, Mark, S.,PANOVA, Anna,O'KEEFE, Daniel, P.,THOMPSON, Jeffrey, Scott,GALLAGHER, F., Glenn,LI, Xu
- Current Assignee: E.I. DUPONT DE NEMOURS AND COMPANY,DICOSIMO, Robert,FOO, Thomas,PAYNE, Mark, S.,PANOVA, Anna,O'KEEFE, Daniel, P.,THOMPSON, Jeffrey, Scott,GALLAGHER, F., Glenn,LI, Xu
- Current Assignee Address: 1007 Market Street, Wilmington, Delaware 19898 US
- Agency: LHULIER, Christine, M.
- Priority: US60/638,168 20041222
Abstract:
A process is provided for producing glycolic acid from formaldehyde and hydrogen cyanide. More specifically, heat-treated formaldehyde and hydrogen cyanide are reacted to produce glycolonitrile having low concentrations of impurities. The glycolonitrile is subsequently converted to an aqueous solution of ammonium glycolate using an enzyme catalyst having nitrilase activity derived from Acidovorax facilis 72W (ATCC 57746). Glycolic acid is recovered in the form of the acid or salt from the aqueous ammonium glycolate solution using a variety of methods described herein.
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