Title:
PROCESS FOR SYNTHESIZING COMPOSITE PIPERAZINE-BASED HEAVY METAL CHELATING AGENT TDDP
Document Type and Number:
WIPO Patent Application WO/2021/129155
Kind Code:
A1
Abstract:
Disclosed is a process for synthesizing a composite piperazine-based heavy metal chelating agent TDDP, the process comprising the following reactions: a condensation reaction of ethylenediamine and glyoxal as raw materials in the presence of a catalyst to produce piperazine-fused piperazine; a reaction, with an organic base tetramethyl guanidine as a catalyst, of the piperazine-fused piperazine with carbon disulfide and sodium hydroxide to produce TDDP; and at the same time a reaction of ethylenediamine with carbon disulfide and sodium hydroxide to produce EDTC. Compared with the prior art, the beneficial effects of the present invention lie in that: during the preparation of TDDP from a solution, in which the piperazine-fused piperazine has been synthesized, under designed reaction conditions, excess ethylenediamine is reacted with carbon disulfide and sodium hydroxide to produce another heavy metal precipitating agent EDTC, so that a removing agent having both a cyclic structure and a linear structure with the function of removing heavy metal ions can be obtained from the prepared target product, the heavy metal chelating agent, without secondary combination, thereby expanding the field of use and making the effect of removing heavy metal ions particularly obvious.
Inventors:
GUO XIANGRONG (CN)
WANG CUI (CN)
ZHAO PING (CN)
ZHAO XU (CN)
SUN CHUNHUI (CN)
YANG RONGHUA (CN)
ZHANG GONGXIAO (CN)
GUO YANKAI (CN)
WANG CUI (CN)
ZHAO PING (CN)
ZHAO XU (CN)
SUN CHUNHUI (CN)
YANG RONGHUA (CN)
ZHANG GONGXIAO (CN)
GUO YANKAI (CN)
Application Number:
PCT/CN2020/125639
Publication Date:
July 01, 2021
Filing Date:
October 31, 2020
Export Citation:
Assignee:
YANTAI ZHONGKE RONGDA NEW MAT CO LTD (CN)
International Classes:
C07D487/04; A62D3/33; C02F1/62; C07C333/14; A62D101/08; A62D101/43
Foreign References:
| CN111057060A | 2020-04-24 | |||
| CN108997262A | 2018-12-14 |
Other References:
FENG XIU: "Synthesis of Capture Agent TDDP and Application in Heavy Metal Ion Removal from Water", (SCIENCE-ENGINEERING (A), CHINA MASTER’S THESES FULL-TEXT DATABASE, 1 May 2018 (2018-05-01), XP055824711
LU MING, LU CHUNXU, WEI YUNYANG, LI ZHIPING: "The Improvement of Technology for Synthesising 1,4,6,9 Tetranitro 1,4,6,9 Tetrazabicyclo Decane", JOURNAL OF NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY, vol. 21, no. 2, 1 April 1997 (1997-04-01), XP055824714, DOI: 10.14177/j.cnki.32-1397n.1997.02.004
LU MING, LU CHUNXU, WEI YUNYANG, LI ZHIPING: "The Improvement of Technology for Synthesising 1,4,6,9 Tetranitro 1,4,6,9 Tetrazabicyclo Decane", JOURNAL OF NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY, vol. 21, no. 2, 1 April 1997 (1997-04-01), XP055824714, DOI: 10.14177/j.cnki.32-1397n.1997.02.004
Attorney, Agent or Firm:
SHANDONG HUAJUN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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