Title:
THE PROCESS OF PRODUCING FORMIC ACID WITH PHOSPHORIC ACID EXTRACTED AND SODIUM FORMATE
Document Type and Number:
WIPO Patent Application WO/2009/026774
Kind Code:
A1
Abstract:
The present invention discloses a process of producing formic acid by the reaction
of phosphoric acid extracted and sodium formate, isopropyl ether is used to extract
Wet-process phosphoric acid at first, and then the extract is added into the reactor
and reacted with sodium formate. The volatility of isopropyl ether is used to
control the temperature below 80 °C during the reaction, thereby limiting
the occurrence of side reactions and increasing the yield and concentration
of the formic acid, thus the process can produce food-grade formic acid of 98%.
The process uses the Wet-process phosphoric acid as the raw material for producing
formicacid.
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Inventors:
LUO YUN (CN)
DENG MIN (CN)
CAO ZHENGXIANG (CN)
DENG MIN (CN)
CAO ZHENGXIANG (CN)
Application Number:
PCT/CN2007/071087
Publication Date:
March 05, 2009
Filing Date:
November 17, 2007
Export Citation:
Assignee:
YIBIN TIANYUAN GROUP COMPANY L (CN)
LUO YUN (CN)
DENG MIN (CN)
CAO ZHENGXIANG (CN)
LUO YUN (CN)
DENG MIN (CN)
CAO ZHENGXIANG (CN)
International Classes:
C07C51/02; C01B25/22; C07C53/02; C07C53/06
Foreign References:
| CN1915954A | 2007-02-21 |
Other References:
CUI: "Deqi, experiments and researches of synthesizing formic acid with phosphoric acid", CHEMICAL INDUSTRY OF SHANXI, vol. 5, 1991, pages 22 - 25
CAI, FANG: "Overview of the Overseas Purification Technology of Wet-process phosphoric acid", CHEMICAL INDUSTRY OF DAILY USE, vol. 6, 1978, pages 5 - 6
CAI, FANG: "Overview of the Overseas Purification Technology of Wet-process phosphoric acid", CHEMICAL INDUSTRY OF DAILY USE, vol. 6, 1978, pages 5 - 6
Attorney, Agent or Firm:
CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (Human Art Wisdom Plaza33 Ximianqiao Street,Wuhou District, Chengdu, CN)
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