Preparation method of cation modified polyacrylamide as well as sewage treatment method

A technology of polyacrylamide and treatment method, which is applied in the direction of water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of unsatisfactory environmental assessment standards, unsatisfactory use effect, and residual water quality There are many impurities and other problems, and the composition and use process of the water purifying agent are simplified and the effect of remarkable purification effect is achieved.

Inactive Publication Date: 2018-06-22
南昌水业集团有限责任公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main component of the water purifying agent used in the flocculation and sedimentation process is polymeric inorganic salts such as polyaluminum chloride, and the corresponding cost is relatively low, but the effect is not ideal according to the national environmental assessment standard. Polyacrylamide compounds have been introduced into the composition of water purifiers in recent years, but most of these compounds on the market are simple polyacrylamides with a single polymer unit structure, and there are still many functionalized polyacrylamides for domestic urban sewage treatment. There is a big blank, and the corresponding use effect is not ideal. This has also led to the innovation of water purifiers in recent years, which mainly focuses on the introduction of more compounds and more complex water purifiers.
[0004] Although this type of technology has realized the comprehensive treatment of various sewage components to a certain extent, it sho

Method used

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  • Preparation method of cation modified polyacrylamide as well as sewage treatment method
  • Preparation method of cation modified polyacrylamide as well as sewage treatment method

Examples

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Example Embodiment

[0024] A method for preparing cationic modified polyacrylamide is disclosed; it includes the following steps:

[0025] (1) Add 50ml-100ml of deionized water, 15g-25g of acrylamide with a concentration of 0.2-0.5g / ml, and 5g-10g of dimethyldiallylammonium chloride with a concentration of 0.1-0.3g / ml in the container , Urea 0.05-0.2g, disodium edetate 0.05-0.2g;

[0026] (2) Pour nitrogen into the container (three-necked flask) to remove oxygen in the container;

[0027] (3) Stir for 0.5h;

[0028] (4) 0.01-0.002g of ammonium persulfate 0.01-0.002g, 0.01-0.002g of a mixture of sodium borohydride and azobisisobutamidine hydrochloride whose total mass accounts for 0.0125% are dissolved in 2~3ml deionized water to form a solution and add step (3) In the stirred solution;

[0029] (5) The temperature is increased to 45~55℃, and the reaction is stopped when the reaction solution becomes a transparent colloid;

[0030] (6) Cooling down, drying the colloid at 70℃~90℃ to constant weight and pulv...

Example Embodiment

[0044] Example 1:

[0045] Preparation of 30% monomer concentration cationic modified polyacrylamide (CPAM):

[0046] 1. In a three-necked flask equipped with a stirrer, reflux condenser and conduit, add 21g of acrylamide, 9g of dimethyldiallylammonium chloride, 0.1g of urea, EDTA-2Na salt (ethylenediaminetetraacetic acid two Sodium) 0.1g, 70mL deionized water;

[0047] 2. Continue to stir for 30 minutes and add nitrogen;

[0048] 3. Slowly add a composite initiator: 0.0053g of ammonium persulfate, 0.0037g of sodium borohydride, 0.0125g of azobisisobutamidine hydrochloride and 2-3mL of deionized water.

[0049] React in a water bath at 4.50℃ for 2-3h until the solution becomes a transparent colloid;

[0050] 5. Take out the reactant and dry it to constant weight in a constant temperature box at 75°C, then pulverize to obtain the cationic modified polyacrylamide (CPAM).

[0051] Use the cationic modified polyacrylamide (CPAM) of the present invention to purify water steps:

[0052] 1. Put ...

Example Embodiment

[0060] Example 2:

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Abstract

The invention discloses a cation modified polyacrylamide water purification agent which is developed to realize flocculating purification of various sewage components, and can optimize the step conditions from preparation to use by aiming at the water purification effect and the application process so as to provide a preparation method of cation modified polyacrylamide as well as a sewage treatment method, which are strong in water purification comprehensive function and simple in process. The preparation method of the cation modified polyacrylamide comprises the following steps: (1) mixing; (2) removing oxygen; (3) stirring; (4) adding a composite initiator; (5) heating until transparent colloid is obtained and stopping heating; and (6) cooling, drying and pulverizing. The sewage treatment method comprises the following steps: (1) adding aluminum polychloride into sewage, and mixing and stirring; (2) adding the cation modified polyacrylamide, and mixing and stirring; (3) performing static flocculation settlement; and (4) filtering, and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of cationic modified polyacrylamide and a sewage treatment method. Background technique [0002] With the rapid improvement of urbanization and industrialization in our country, the total amount of sewage has increased, and the composition of sewage has become increasingly complex. From the perspective of natural environmental protection and sustainable development of the national economy, the relevant national environmental protection discharge standards have become more and more stringent. This reality objectively requires the innovation and upgrading of sewage treatment and environmental protection technology to adapt to it. At present, urban sewage is mainly collected and purified by water treatment plants before being discharged into the natural water system. The core process is the flocculation and sedimentation of sewage components with a spec...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/52C08F220/56C08F226/02
CPCC02F1/56C02F1/5236C08F220/56C08F226/02
Inventor 赵丹魏锋张雨青李钢王曦
Owner 南昌水业集团有限责任公司
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