发明授权
- 专利标题: Process for the production of oxalic acid
- 专利标题(中): 草酸生产工艺
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申请号: US43137374申请日: 1974-01-07
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公开(公告)号: US3864393A公开(公告)日: 1975-02-04
- 发明人: ROHL HERMANN , KNEPPER WILHELM
- 申请人: HUELS CHEMISCHE WERKE AG
- 专利权人: Huels Chemische Werke Ag
- 当前专利权人: Huels Chemische Werke Ag
- 优先权: DE2301197 1973-01-11
- 主分类号: C07C55/06
- IPC分类号: C07C55/06 ; C07C51/00 ; C07C51/31 ; C07C67/00 ; C07C51/24
摘要:
The nitrous oxides released when ethylene oxide is introduced at 30*-70*C. into aqueous nitric acid of 50-70 percent by weight of HNO3 is recirculated thereto and gaseous oxygen is introduced into the nitric acid. A post-oxidation holding of the oxidation mixture for 8-24 hours at 30*-70*C. increases the yield of oxalic acid.