Production of high purity ritalin from waste liquid or gas containing it |
Title: |
Production of high purity ritalin from waste liquid or gas containing it |
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Application Number: |
200510002905 |
Application Date: |
2005/01/26 |
Announcement Date: |
2005/10/12 |
Pub. Date: |
2007/02/07 |
Publication Number: |
1680267 |
Announcement Number: |
1298693 |
Grant Date: |
2007-2-7 |
Granted Pub. Date: |
2007-2-7 |
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
C07C 69/14, C07C 67/56 |
Applicant(s): |
Qinghua Univ. |
Inventor(s): |
Chen Jian, Liu Dehua, Zhang Ting, Du Wei |
Key Words: |
ritalin, waste liquid, gas, high purity, production |
Abstract: |
Production of high-purity methyl ester acetate from waste liquid or tail gas containing methyl ester acetate is carried out by azeotropic distilling waste liquid or tail gas containing methyl ester acetate during industrial process of polyvinyl alcohol and terephthalic acid, adsorptive distilling, condensing refluxing and desorbing regenerating. It achieves high purity. |
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