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Ring amidino-polymer flocculant and preparation method thereof

A polymer flocculant, amidine-based technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high molecular weight, short flocculation and sedimentation time, and small application range of acrylamide-modified flocculants, and achieve high-efficiency flocculation. , the effect of high molecular weight and high intrinsic viscosity

Active Publication Date: 2011-05-11
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculant involved in Chinese patent 200810064681 is composed of organic polymer flocculant and inorganic composite flocculant, and the structure contains amide groups, silicic acid and other groups, so the oil removal effect is good, and the flocculation and precipitation time is short, but due to It contains phosphate, which is easy to cause secondary pollution
The acrylamide modified flocculant involved in Japanese patent 2004255349 has a large molecular weight, strong flocculation ability, and produces less scum, but its water solubility is not good, and its application range is small

Method used

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  • Ring amidino-polymer flocculant and preparation method thereof
  • Ring amidino-polymer flocculant and preparation method thereof
  • Ring amidino-polymer flocculant and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0018] Room temperature, N 2 Under the atmosphere, mix 10g of acrylamide and 10mL of acrylonitrile, then add 100mL of deionized water, stir well, then add 5mL of 0.5% aqueous solution of azobisisobutylamidine hydrochloride dropwise at 65°C for 20min. After completion of the reaction, the reaction was continued for 8 hours. After the reaction, the reaction solution was poured into acetone with 3 times the volume of the reaction solution, filtered, and vacuum-dried at 50° C. to obtain a white acrylamide-acrylonitrile polymer;

[0019] At -10°C, mix 10mL of 10% acrylamide-acrylonitrile polymer aqueous solution with 30mL of sodium hypochlorite aqueous solution with an available chlorine content of 6%, then add 100mL of 10M sodium hydroxide aqueous solution to react for 1 hour, and then continue to react at 0°C for 10 hours After the reaction, the reaction solution was poured into acetone with 3 times the volume of the reaction solution, filtered to obtain a light yellow modified p...

example 2

[0022] Room temperature, N 2 Under the atmosphere, mix 10g of acrylamide and 10mL of acrylonitrile, then add 100mL of deionized water, after stirring evenly, add 3mL of 0.5% potassium persulfate and 3mL of 0.5% sodium bisulfite mixed aqueous solution dropwise at 65°C , 20min. After dripping, continue the reaction for 8h. After the reaction, pour the reaction solution into acetone with 3 times the volume of the reaction solution, filter, and vacuum dry at 50°C to obtain a white acrylamide-acrylonitrile polymer;

[0023] At -10°C, mix 10mL of 10% acrylamide-acrylonitrile polymer aqueous solution with 30mL of sodium hypochlorite aqueous solution with an available chlorine content of 6%, then add 100mL of 10M sodium hydroxide aqueous solution to react for 1 hour, and then continue to react at 0°C for 10 hours After the reaction, the reaction solution was poured into acetone with 3 times the volume of the reaction solution, filtered to obtain a light yellow modified polymer interme...

example 3

[0026] Room temperature, N 2 Under atmosphere, mix 8g of acrylamide, 2g of N-vinylformamide and 10mL of acrylonitrile, then add 100mL of deionized water, stir well, then add 5mL of 0.5% azobisisobutylamidine salt dropwise at 65°C Aqueous acid salt solution, 20min. After dripping, continue to react for 8h. After the reaction, pour the reaction solution into acetone with 3 times the volume of the reaction solution, filter, and vacuum dry at 50°C to obtain a white acrylamide-acrylonitrile polymer;

[0027] At -10°C, mix 10mL of 10% acrylamide-acrylonitrile polymer aqueous solution with 30mL of sodium hypobromite aqueous solution with an effective bromine content of 6%, and then add 100mL of 10M sodium hydroxide aqueous solution to react for 1 hour, then at 0°C Continue the reaction for 10 hours. After the reaction, pour the reaction solution into acetone with 3 times the volume of the reaction solution, filter to obtain a light yellow modified polymer intermediate, add water to d...

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Abstract

The invention provides a ring amidino-polymer flocculant and a preparation method thereof. The flocculant has the characteristics of large limiting viscosity, high charge density, good water solubility and the like, and is polymerized by acrylamide functional monomer and acrylonitrile through radicals. In the structural formula of the flocculant, degree of polymerization m is between 100 and 6,000, and degree of polymerization n is between 100 and 1,000; X is -Cl or -HSO4; and Y is one of -CN, -NH2, -CONH2, -NHCHO and -COOH substituent groups.

Description

technical field [0001] The invention relates to a cyclic amidine-based polymer flocculant and a preparation method thereof. The flocculant has the characteristics of high intrinsic viscosity, high charge density, and good water solubility, and is suitable for oily wastewater treatment in oil fields, and belongs to the flocculation in the field of water treatment technology Dosage preparation technology. Background technique [0002] With the development of petrochemical industry, the discharge of oily wastewater is increasing day by day. Among them, a large amount of wastewater is generated in oilfield tertiary oil recovery. For example, treating oilfield wastewater and recycling it for reinjection water is an effective measure to achieve sustainable development of water resources, and it is also an important issue facing oilfields. topic. This reinjection water must meet certain technological requirements, otherwise it will not only cause sedimentation and blockage of pipe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C08F220/56C08F220/48C08F8/48C08F220/54
Inventor 周钰明陶元见周建成
Owner SOUTHEAST UNIV
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