Title:
REFINEMENT METHOD FOR NITROMETHANE
Document Type and Number:
WIPO Patent Application WO/2021/244136
Kind Code:
A1
Abstract:
Provided in the present invention is a refinement method for nitromethane. The refinement method comprises the following steps: (1) rectifying a nitromethane crude product, and collecting a gas phase fraction for condensation, thus producing a rectified liquid-phase fraction; (2) filtering the rectified liquid-phase fraction via a lipophilic and hydrophobic membrane capable of separating nitromethane from an aqueous phase, collecting a rectification permeate, and producing a nitromethane refined product. The refinement method for nitromethane of the present invention allows quick and highly efficient removal of impurities such as water in the nitromethane crude product, reduces the number of instances of rectification and the time for rectification reflux, increases the purity and yield of the nitromethane product, reduces the energy consumption of rectification, is simple and convenient to operate, and has broad application prospects.
Inventors:
TIAN TONG (CN)
DING HONGLIN (CN)
HUANG JINHU (CN)
SHI JIAHONG (CN)
CAO SHUAI (CN)
DING HONGLIN (CN)
HUANG JINHU (CN)
SHI JIAHONG (CN)
CAO SHUAI (CN)
Application Number:
PCT/CN2021/086228
Publication Date:
December 09, 2021
Filing Date:
April 09, 2021
Export Citation:
Assignee:
HUBEI GRAND FUCHI PHARMACEUTICAL & CHEMICALS CO LTD (CN)
HUBEI FUBO CHEMICAL & IND CO LTD (CN)
HUBEI FUBO CHEMICAL & IND CO LTD (CN)
International Classes:
C07C201/16; B01D17/02; C07C205/02
Foreign References:
| US3211630A | 1965-10-12 | |||
| CN103553924A | 2014-02-05 | |||
| CN105237404A | 2016-01-13 | |||
| CN106278901A | 2017-01-04 | |||
| CN109053454A | 2018-12-21 | |||
| CN111019127A | 2020-04-17 | |||
| US3480516A | 1969-11-25 |
Attorney, Agent or Firm:
LINDA LIU & PARTNERS (CN)
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