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Micro-crosslinking star-shaped flocculating agent, preparation method and application of micro-crosslinking star-shaped flocculating agent in sewage treatment

A flocculant and micro-crosslinking technology, applied in the field of water treatment, can solve the problems of difficult treatment effect, high cost, single flocculant, etc., and achieve the effect of good treatment effect and low cost

Active Publication Date: 2022-07-22
山东微观生态研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the above patents, it can be seen that the cost of sewage flocculants is still high and a single flocculant is difficult to achieve a good treatment effect. Therefore, the development of low-cost and high-efficiency flocculants with new structures is an urgent need for the sewage treatment industry.

Method used

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  • Micro-crosslinking star-shaped flocculating agent, preparation method and application of micro-crosslinking star-shaped flocculating agent in sewage treatment
  • Micro-crosslinking star-shaped flocculating agent, preparation method and application of micro-crosslinking star-shaped flocculating agent in sewage treatment
  • Micro-crosslinking star-shaped flocculating agent, preparation method and application of micro-crosslinking star-shaped flocculating agent in sewage treatment

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: A kind of micro-crosslinked star-shaped flocculant, preparation method and its application in sewage treatment

[0035] Include the following steps:

[0036] 1. Preparation of sorbitol amino prepolymer

[0037] 160 grams of sorbitol, 120 grams of 2-chloroethyl isocyanate, and 140 grams of methyl ethyl ketone were added to the four-necked flask, and 4.2 grams of succinimide were added. After nitrogen was introduced into the inner liquid for 25 minutes to drive off oxygen, under the protection of continuous nitrogen, the temperature was raised to 60°C at 2°C / min. After the addition was completed, the stirring reaction was continued for 1.6 hours to obtain a sorbitol amino prepolymer;

[0038] The toluene solution of the composite catalyst is composed of nickel isooctanoate, dimethylaminopropylamine diisopropanol, tris(dimethylaminopropyl) hexahydrotriazine and toluene in a mass ratio of 6:9:8:977;

[0039] 2. Xanthation of sorbitol amino prepolymer

[00...

Embodiment 2

[0043] Embodiment 2: A kind of micro-cross-linked star-shaped flocculant, preparation method and its application in sewage treatment

[0044] Include the following steps:

[0045] 1. Preparation of sorbitol amino prepolymer

[0046] 140 grams of sorbitol, 100 grams of 2-chloroethyl isocyanate, and 80 grams of methyl ethyl ketone were added to the four-necked flask, and 1.6 grams of succinimide was added. Nitrogen was introduced into the inner liquid for 20 minutes to drive off the oxygen. Under the protection of continuous nitrogen, the temperature was raised to 50°C at 1°C / min. After adding, continue stirring reaction after 1 hour, obtain sorbitol amino prepolymer;

[0047] The toluene solution of the composite catalyst is composed of nickel isooctanoate, dimethylaminopropylamine diisopropanol, tris(dimethylaminopropyl) hexahydrotriazine and toluene in a mass ratio of 4:8:5:973;

[0048] 2. Xanthation of sorbitol amino prepolymer

[0049] Add 19.8 grams of potassium ethyl...

Embodiment 3

[0052] Embodiment 3: A kind of micro-crosslinked star-shaped flocculant, preparation method and its application in sewage treatment

[0053] Include the following steps:

[0054] 1. Preparation of sorbitol amino prepolymer

[0055] 180 grams of sorbitol, 140 grams of 2-chloroethyl isocyanate, and 200 grams of methyl ethyl ketone were added to the four-necked flask, and 7 grams of succinimide were added. After nitrogen was introduced into the inner liquid for 40 minutes to drive off oxygen, under the protection of continuous nitrogen, the temperature was raised to 65°C at 2.5°C / min. After adding, continue stirring reaction after 2 hours, obtain sorbitol amino prepolymer;

[0056] The toluene solution of the composite catalyst is composed of nickel isooctanoate, dimethylaminopropylamine diisopropanol, tris(dimethylaminopropyl) hexahydrotriazine and toluene in a mass ratio of 8:10:10:983;

[0057] 2. Xanthation of sorbitol amino prepolymer

[0058] Add 44 grams of potassium e...

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Abstract

The invention discloses a micro-crosslinking star-shaped flocculating agent, a preparation method and application of the micro-crosslinking star-shaped flocculating agent in sewage treatment. The preparation method comprises the steps of preparation of a sorbitol amino prepolymer, xanthation of the sorbitol amino prepolymer and acrylamide chain extension reaction. The low-cost star-shaped flocculant with a novel structure is prepared from low-cost acrylamide and can be used for treating industrial sewage and oilfield sewage, and a very good treatment effect can be obtained under the condition that the addition amount is very small. When papermaking sewage is treated, the pH application range of the flocculant is 2.5-10.5, the addition amount of the flocculant is 15 mg / L, the CODcr (dichromate index) removal rate is 68.4-72.3%, and the chroma removal rate is 95.4-98.3%; when oil field sewage is treated, the oil removal rate is 63.7-66% when the oil removal agent is added into 8 mg / L, the oil removal rate is 67-69.3% when the oil removal agent is added into 16 mg / L, and the oil removal rate is 75.3-78.3 when the oil removal agent is added into 24 mg / L.

Description

technical field [0001] The invention relates to a micro-cross-linked star-shaped flocculant, a preparation method and its application in sewage treatment, and belongs to the technical field of water treatment. Background technique [0002] With the rapid economic development and the rapid growth of urban population, the amount of urban sewage and industrial sewage is also growing rapidly. The huge volume of sewage brings considerable pressure to environmental protection, which poses a serious threat to the coordinated and sustainable development of economy and environment. Therefore, how to improve the quality and efficiency of sewage treatment has become an important issue in the field of sewage treatment. [0003] Among the various sewage treatment processes at present, the flocculation treatment process has received more attention due to its simplicity, economy and high efficiency. The flocculation and sedimentation technology to treat sewage requires high performance of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/56C02F1/56C02F103/10C02F103/28
CPCC08F283/065C08F283/06C02F1/56C02F2103/28C02F2103/10C08F220/56
Inventor 严希海严谨秦文翠
Owner 山东微观生态研究中心有限公司