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Bio-based amphoteric polymer as well as preparation method and application thereof

An amphoteric polymer, bio-based technology, applied in the direction of adding substances to water/sewage treatment, etc., can solve the problems of low molecular weight and few active adsorption points, and achieve good results and improve general performance.

Pending Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lignosulfonate is a natural polymer material, but its average relative molecular weight is low and its active adsorption points are few, which limits its application in flocculants, and requires some chemical modification to improve its application performance

Method used

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  • Bio-based amphoteric polymer as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Steps:

[0054] Step 1: Add 0.5 g of sodium lignosulfonate, 0.25 g of ferrous sulfate, 0.8 g of hydrogen peroxide and 18 g of solvent deionized water into the reactor, and stir until completely dissolved.

[0055] Step 2, replace the air in the reactor with nitrogen and continuously feed nitrogen, heat up, and add 2 grams of methacryloyloxyethyltrimethylammonium chloride (DMC) with a concentration of 80wt% under the condition of 50°C Aqueous solution of 60wt% acryloyloxyethyltrimethylammonium chloride (DAC) solution, 1 gram concentration of 60wt% dimethyl diallyl ammonium chloride (DMDAAC) and 0.015 g of potassium persulfate started the reaction.

[0056] Step 3, dissolving 1 g of itaconic acid monomer with 10 g of deionized water, and adjusting the pH value to 6-7 to obtain an itaconic acid aqueous solution. The aqueous solution of itaconic acid whose pH value has been adjusted is added dropwise to the reaction system, and the addition is completed in 60 minutes. Th...

Embodiment 2

[0060] Steps:

[0061] Step 1: Add 1.2 grams of sodium lignosulfonate, 0.5 grams of ferrous sulfate, 1 gram of hydrogen peroxide and 30 grams of solvent deionized water into the reactor, and stir until completely dissolved.

[0062] Step 2, replace the air in the reactor with nitrogen and continuously feed nitrogen, heat up, and add 4 grams of methacryloyloxyethyltrimethylammonium chloride (DMC) with a concentration of 80wt% under the condition of 60°C Aqueous solution of 60wt% acryloyloxyethyltrimethylammonium chloride (DAC) and 0.03 gram of ammonium persulfate were started to react.

[0063] Step 3, dissolving 0.8 g of itaconic acid monomer with 6 g of deionized water, and adjusting the pH value to 6-7 to obtain an itaconic acid aqueous solution. The aqueous solution of itaconic acid whose pH value has been adjusted is added dropwise to the reaction system, and the dropwise addition is completed in 40 minutes. The reaction was continued for 6 hours.

[0064] Step 4, cooli...

Embodiment 3

[0067] Steps:

[0068] Step 1: Add 2 grams of sodium lignosulfonate, 1 gram of ferrous sulfate, 2.5 grams of hydrogen peroxide and 12 grams of solvent deionized water into the reactor, and stir until completely dissolved.

[0069] Step 2, replace the air in the reactor with nitrogen and continuously feed nitrogen, heat up, and add 3 grams of methacryloyloxyethyltrimethylammonium chloride (DMC) with a concentration of 80wt% under the condition of 80°C An aqueous solution, 1.8 g of a 60% strength by weight aqueous solution of dimethyldiallylammonium chloride (DMDAAC) and 0.07 g of potassium persulfate were started to react.

[0070] Step 3, dissolving 0.4 g of itaconic acid monomer with 5 g of deionized water, and adjusting the pH value to 6-7 to obtain an itaconic acid aqueous solution. The aqueous solution of itaconic acid whose pH value has been adjusted is added dropwise to the reaction system, and the dropwise addition is completed within 20 minutes. The reaction was cont...

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Abstract

The invention relates to a bio-based amphoteric polymer as well as a preparation method and application thereof. The bio-based amphoteric polymer is formed by polymerizing lignosulfonate, itaconic acid and at least one substance selected from methacryloyloxyethyl trimethyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride and dimethyl diallyl ammonium chloride. The polymeric flocculant containing the amphoteric polymer has the advantages of being environmentally friendly and good in demulsification and deoiling effect on crude oil sewage. Meanwhile, amphoteric polymers with different proportions can be selected according to different crude oil sewage to prepare corresponding polymeric flocculants, so that the broad-spectrum performance of the flocculant is improved. In addition, lignosulfonate and itaconic acid are important bio-based chemical raw materials. The wide application of the bio-based raw materials can effectively deal with the problems caused by oil resource exhaustion and environmental pollution, and has very important significance.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a bio-based amphoteric polymer and its preparation method and application. Background technique [0002] Flocculant plays an important role in the solid-liquid separation of industrial wastewater and domestic sewage treatment process. With a flocculant with superior performance, by controlling the appropriate dosage and mixing method, and adding a reasonable subsequent sedimentation and filtration process, a relatively high quality can be obtained. Ideal processing effect. Therefore, the development of new and efficient flocculants is the goal that the majority of water treatment workers at home and abroad pay attention to. At present, the most widely used organic polymer flocculant is polyacrylamide, but its monomer has "three-caused" toxicity, which will cause secondary pollution to the water body. Therefore, exploring efficient and environmentally friendly floccula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F222/02C08F220/34C08F226/02C02F1/68
CPCC08F289/00C02F1/68C08F222/02C08F220/34C08F226/02
Inventor 侯丹丹许春梅张增丽徐伟张天宇
Owner CHINA PETROLEUM & CHEM CORP