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A kind of synthesis technique of composite piperazine heavy metal chelating agent tddp

A technology of heavy metal chelating agent and synthesis process, which is applied in the fields of organic chemistry, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of no segmental control of reaction temperature, unreasonable ratio of raw materials, and inability to carry out the reaction, etc. problem, achieve the effect of shortening the reaction time, increasing the conversion rate and increasing the yield

Active Publication Date: 2021-09-21
YANTAI ZHONGKE RONGDA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] In the in-depth study of the material ratio, reaction temperature control, and reaction time of the existing TDDP synthesis process, it was found that the existing TDDP synthesis in China has no segmental control of the reaction temperature, which leads to the failure of the reaction, unreasonable raw material ratio, and long reaction time. , many side reactions and other defects, the technical problems to be solved by the present invention include:

Method used

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  • A kind of synthesis technique of composite piperazine heavy metal chelating agent tddp
  • A kind of synthesis technique of composite piperazine heavy metal chelating agent tddp
  • A kind of synthesis technique of composite piperazine heavy metal chelating agent tddp

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Embodiment 1

[0070] Embodiment 1: the synthetic technique of compound type piperazine heavy metal chelating agent TDDP

[0071] 1. Raw material preparation: measure 525 kg of ethylenediamine and suck it into the first reaction kettle with vacuum, add 150 g of tetrahydroquinoline, start stirring, and the stirring speed is 83 rpm;

[0072] Measure 315 kg of 40% glyoxal aqueous solution and pump it into the glyoxal high level tank;

[0073] Measure 2760 kg of NaOH solution with a concentration of 30% and put it into the NaOH intermediate tank;

[0074] Use compressed air to press 1335 kg of carbon disulfide from the storage tank into the middle tank of carbon disulfide (the height of the water in the middle tank must be guaranteed not to be lower than 15mm), and press it into the high level tank of carbon disulfide from the middle tank in two times, and press about 700 kg for the first time , the rest is pressed into the carbon disulfide high-level tank for the second time (it must be ensure...

Embodiment 2

[0079] Embodiment 2: the synthetic technique of compound type piperazine heavy metal chelating agent TDDP

[0080] 1. Raw material preparation: measure 536 kg of ethylenediamine and suck it into the first synthesis kettle with vacuum, add 170 g of tetrahydroquinoline, start stirring, and the stirring speed is 83 rpm;

[0081] Measure 320 kg of 40% glyoxal aqueous solution and pump it into the glyoxal high level tank;

[0082] Measure 2850 kg of NaOH solution with a concentration of 30% and put it into the middle tank;

[0083] Use compressed air to press 1355 kg of carbon disulfide from the storage tank into the middle tank of carbon disulfide (the height of the water in the middle tank must not be lower than 15mm), and press it into the high level tank of carbon disulfide from the middle tank in two times, and press about 700 kg for the first time , the rest is pressed into the carbon disulfide high-level tank for the second time (it must be ensured that the height of the wa...

Embodiment 3

[0088] Embodiment 3: the synthetic technique of compound type piperazine heavy metal chelating agent TDDP

[0089] 1. Raw material preparation: measure 538 kg of ethylenediamine, suck it into the first synthesis kettle with vacuum, add 180 g of tetrahydroquinoline, start stirring, and the stirring speed is 83 rpm;

[0090] Pump 322 kg of 40% glyoxal aqueous solution into the glyoxal high level tank after metering;

[0091] Measure 2980 kg of NaOH solution with a concentration of 30% and put it into the middle tank;

[0092] Use compressed air to press 1365 kg of carbon disulfide from the storage tank into the middle tank of carbon disulfide (the height of the water in the middle tank must be guaranteed not to be lower than 15mm), and press it into the high level tank of carbon disulfide from the middle tank in two times, and press about 750 kg for the first time , the rest is pressed into the carbon disulfide high-level tank for the second time (it must be ensured that the he...

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Abstract

The invention discloses a synthesis process of a composite piperazine heavy metal chelating agent TDDP, which comprises the following reactions: using ethylenediamine and glyoxal as raw materials, condensation reaction occurs in the presence of a catalyst to generate dipiperazine; Tetramethylguanidine is used as a catalyst, and dipiperazine reacts with carbon disulfide and sodium hydroxide to generate TDDP; at the same time, ethylenediamine reacts with carbon disulfide and sodium hydroxide to generate EDTC. Compared with the prior art, the beneficial effect of the present invention is: under the designed reaction conditions, while the solution after the synthesis of dipiperazine is preparing TDDP, excess ethylenediamine reacts with carbon disulfide and sodium hydroxide to form another A heavy metal precipitant EDTC, so that the target product of the heavy metal chelating agent can be obtained without the need for secondary compounding to obtain a remover with both a ring structure and a linear structure to remove heavy metal ions, which expands the application field and removes heavy metal ions. Especially obvious.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and in particular relates to a synthesis process of a composite piperazine heavy metal chelating agent TDDP. The composite piperazine heavy metal chelating agent can be used for removing heavy metals in waste water and fly ash. Background technique [0002] With the rapid development of modern industry, the content of heavy metals in industrial waste liquid is getting higher and higher, and the problem of environmental pollution caused by heavy metals has become increasingly prominent, seriously affecting the health and survival of human beings and other organisms. Because such pollutants cannot be biodegraded, they can enter plants and animals through the biological chain cycle, and eventually endanger human health. Moreover, even trace amounts of heavy metals can produce toxic effects. Using effective treatment methods to reduce the content of heavy metals in industri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/04C07C333/16C02F1/62A62D3/33A62D101/08A62D101/43
CPCA62D3/33A62D2101/08A62D2101/43C02F1/62C07C333/16C07D487/04
Inventor 郭祥荣杨荣华张恭孝王璀孟宪锋崔萌刘瑞鹏
Owner YANTAI ZHONGKE RONGDA NEW MATERIAL CO LTD
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