发明名称 |
Mono- or di-carboxylic acid ester and ammonium sulphate prepn. - using ammonium bi-sulphate free from the corresp. amide using only half the sulphuric acid normally used |
摘要 |
<p>Prepn. of mono or dicarboxylic acid esters with aliphatic alcohols and ammonium sulphate comprises reacting at elevated temp. the corresp. acid amides with an alcohol, and sulphur acid and/or ammonium bisulphate using 0.3-0.6 mole sulphuric acid or 0.6-1.2 mole of bisulphate and 1-6 moles of alcohol per equiv. of acid amide. The process uses much less sulphuric acid than the normal, and it can be carried out using ammonium bisulphate, usually regarded as an undesirable waste by-product, to give the esters and the ammonium sulphate free of bisulphate.</p> |
申请公布号 |
DE2747645(A1) |
申请公布日期 |
1979.04.26 |
申请号 |
DE19772747645 |
申请日期 |
1977.10.24 |
申请人 |
LENTIA GMBH,CHEM.U.PHARM. ERZEUGNISSE - INDUSTRIEBEDARF |
发明人 |
SCHOENBECK,RUPERT,DR.;WECHSBERG,MANFRED,DR. |
分类号 |
C07C;C07C67/20;C07C69/14;C07C69/16;(IPC1-7):C07C69/14 |
主分类号 |
C07C |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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