Title:
EXTRACTION METHOD AND EXTRACTANT FOR DENITRATION PROCESS IN H ACID PRODUCTION PROCESS
Document Type and Number:
WIPO Patent Application WO/2019/109565
Kind Code:
A1
Abstract:
An extraction method and an extractant for a denitration process in a H acid production process. First, an extractant is formulated. The extractant comprises a solvent, a diluent, and a cosolvent. The cosolvent is 2-ethylhexyl 2-ethylhexyl phosphate, the solvent is a tertiary amine solvent, and the diluent is one or more of sulfonated kerosene, benzene, or toluene. Subsequently, the extractant is used to extract a denitrate, and a complex layer and an inorganic acid/water layer are formed after extraction. The inorganic acid/water layer is separated and subsequently applied to an H acid segregation step, the complex layer is stripped, a stripping agent is added for stripping to form an organic substance/water phase having a pH of 7-9. The denitrate forms a trisodium salt, the solution is stratified by standing, an organic layer is separated, and a solvent layer is subsequently applied.
Inventors:
WEI TIEMING (CN)
HUANG SHENGYONG (CN)
HU HUOJU (CN)
HUANG SHENGYONG (CN)
HU HUOJU (CN)
Application Number:
PCT/CN2018/082730
Publication Date:
June 13, 2019
Filing Date:
April 12, 2018
Export Citation:
Assignee:
JINGMEN XIONG XING CHEMICAL CO LTD (CN)
International Classes:
B01D11/04
Foreign References:
| CN106086408A | 2016-11-09 | |||
| CN104532021A | 2015-04-22 | |||
| CN102994750A | 2013-03-27 | |||
| CN1486978A | 2004-04-07 | |||
| CN106145236A | 2016-11-23 | |||
| CN101780994A | 2010-07-21 | |||
| CN103803753A | 2014-05-21 | |||
| JP2012086209A | 2012-05-10 |
Attorney, Agent or Firm:
WUHAN DONGYU PATENT AGENCY (CN)
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