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Star type copolymer sewage treatment agent using cyclodextrin as core and RAFT preparation method of star type copolymer sewage treatment agent

A technology of star copolymer and sewage treatment agent, which is applied in the field of water treatment, can solve the problems of high price and low utilization rate, and achieve the effect of large dispersion coefficient, stable performance and good flocculation effect

Inactive Publication Date: 2017-12-19
内蒙古信尚环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the flocculant described in this invention has adopted expensive chitosan in a large amount, and it is very easy to precipitate when the molecular weight is large and chelated, and has the disadvantages of high price and low utilization rate

Method used

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  • Star type copolymer sewage treatment agent using cyclodextrin as core and RAFT preparation method of star type copolymer sewage treatment agent
  • Star type copolymer sewage treatment agent using cyclodextrin as core and RAFT preparation method of star type copolymer sewage treatment agent
  • Star type copolymer sewage treatment agent using cyclodextrin as core and RAFT preparation method of star type copolymer sewage treatment agent

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Effect test

Embodiment 1

[0024] The star-shaped copolymer sewage treatment agent with cyclodextrin as the core of the present invention uses cyclodextrin as the core, and each glucose unit of the cyclodextrin is connected with an acrylamide copolymer molecular chain, and the number average molecular weight is 300,000 to 800,000 , and the polydispersity coefficient is less than 1.5, and the specific preparation method is as follows:

[0025] (a) Preparation of star-shaped RAFT reagent: Dissolve 20 parts of 2-(propyltrithiocarbonate)-2-methylpropionyl chloride in 30 parts of DMSO, and record it as solution a; 5.5 parts of 1,3 -Put propylenediamine into the reactor, heat to 90°C under stirring, then add solution a dropwise, after 0.5h dropwise addition, continue to react for 5h to obtain trithioester solution b containing amino groups; then add to the above solution Add 30 parts of poly(6-p-toluenesulfonyl) cyclodextrin to b, react at 90°C for 12 hours, cool to room temperature after the reaction, dissol...

Embodiment 2

[0029] The star-shaped copolymer sewage treatment agent with cyclodextrin as the core of the present invention uses cyclodextrin as the core, and each glucose unit of the cyclodextrin is connected with an acrylamide copolymer molecular chain, and the number average molecular weight is 300,000 to 800,000 , and the polydispersity coefficient is less than 1.5, and the specific preparation method is as follows:

[0030](a) Preparation of star-shaped RAFT reagent: 25 parts of 2-(ethyltrithiocarbonate)-2-methylpropionyl chloride were dissolved in 60 parts of THF, which was recorded as solution a; 8.4 parts of butanediol Add the amine into the reactor, heat it to 70°C under stirring, then add the solution a dropwise, and continue the reaction for 2 hours after the dropwise addition is completed for 1 hour to obtain the trithioester solution b containing the amino group; then add 50 Parts of poly(6-p-toluenesulfonyl)cyclodextrin, reacted at 70°C for 6 hours, cooled to room temperature...

Embodiment 3

[0034] The star-shaped copolymer sewage treatment agent with cyclodextrin as the core of the present invention uses cyclodextrin as the core, and each glucose unit of the cyclodextrin is connected with an acrylamide copolymer molecular chain, and the number average molecular weight is 300,000 to 800,000 , and the polydispersity coefficient is less than 1.5, and the specific preparation method is as follows:

[0035] (a) Preparation of star-shaped RAFT reagent: 22 parts of ethyl dithioacetate chloride are dissolved in 40 parts of butyl acetate, which is recorded as solution a; 15 parts of 1,6-hexamethylenediamine are added to the reactor , heated to 75°C under stirring, then added solution a drop by drop, continued to react for 4 hours after 0.7h dropwise addition, and obtained dithioester solution b containing amino groups; then added 40 parts more (6 - p-toluenesulfonyl)cyclodextrin, reacted at 75°C for 9h, cooled to room temperature after the reaction was completed, dissolve...

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Abstract

The invention relates to a star type copolymer sewage treatment agent using cyclodextrin as a core and an RAFT preparation method of the star type copolymer sewage treatment agent. In the invention, cyclodextrin is used as the core, each glucose unit of the cyclodextrin is connected with an acrylamide copolymer molecular chain, the average molecular weight is 300,000-800,000, and the polydispersity coefficient is less than 1.5. The preparation method comprises the following steps: firstly, reacting acyl chloride-containing dithioester or trithioester with diamine to prepare amino-substituted dithioester or trithioester, and then reacting amino-substituted dithioester or trithioester with 6-(p-toluenesulfonyl) cyclodextrin to prepare a star type RAFT reagent; and then initiating aqueous solution polymerization of a monomer to prepare a star type copolymer under the action of an initiator and the star type RAFT reagent. The copolymer sewage treatment agent has the advantages of stable performance and high flocculation efficiency.

Description

technical field [0001] The invention relates to a sewage treatment agent, in particular to a star-shaped copolymer sewage treatment agent with cyclodextrin as the core and a RAFT preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] my country is a country with serious shortage of water resources and serious waste of water resources. With the rapid urbanization process, the pollution of urban industrial wastewater and domestic wastewater is becoming more and more serious. It is particularly important to strengthen sewage treatment, especially industrial wastewater treatment. According to statistics, my country's annual discharge of industrial wastewater is about 8 × 10 8 m 3 , which not only contains highly toxic ingredients such as cyanide and chlorophenol, but also contains metal ions such as chromium, zinc and nickel. There are many ways to treat wastewater, mainly chemical precipitation, electrolysis and membrane...

Claims

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Application Information

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IPC IPC(8): C02F1/56
CPCC02F1/56
Inventor 杨文思
Owner 内蒙古信尚环保科技有限公司
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