Flocculating agent as well as raw material composition, preparation method and application thereof

A raw material composition and flocculant technology, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water treatment parameter control, etc., can solve the problems of high toxicity of chemical flocculants, difficulty in post-treatment, waste liquid utilization rate, etc. Low-cost problems, to achieve the effect of improving settleability, simple and easy preparation steps, and low cost

Pending Publication Date: 2022-03-18
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the high toxicity of chemical flocculants in the prior art, which is easy to cause secondary pollution; and the utilization rate of waste liquid produced in the pulping process by high-yield pulping technology is low, and post-treatment is difficult To overcome such defects, a flocculant, its raw material composition, its preparation method and application are provided

Method used

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  • Flocculating agent as well as raw material composition, preparation method and application thereof
  • Flocculating agent as well as raw material composition, preparation method and application thereof
  • Flocculating agent as well as raw material composition, preparation method and application thereof

Examples

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preparation example Construction

[0058] In the following examples and comparative examples; the preparation method of pulping waste liquid comprises the following steps: taking poplar as raw material, pulping through the PRC-APMP pulping method, removing the remaining material after the pulp is pulping waste liquid, pulping waste The solids content of the liquid was 57%.

[0059] The pulping waste liquor includes the following components in parts by weight: 50 parts of cellulose, 15 parts of lignin, 0.15 parts of xylose and 32 parts of sodium acetate.

[0060] The polyacrylamide in the following examples is a cationic polyacrylamide with a number average molecular weight of 9×10 6 about.

Embodiment 1

[0062] (1) Add 50 g of pulping waste liquid and 325 g of deionized water into a 500 mL beaker, stir for 5 min, pass through an 80-mesh sieve, and collect the filtrate;

[0063] Add the above-mentioned filtrate into a four-necked flask with a condenser tube and a stirring rotor. At room temperature, add 7.5 g of polyacrylamide into the four-necked flask in three times, and mix for 10 minutes to obtain pulping waste liquid and polyacrylamide. mixture;

[0064] At a temperature of 50°C, add 10 g of 10% by mass ammonium persulfate aqueous solution dropwise to the mixture of pulping waste liquor and polyacrylamide for 10 minutes; after the dropwise addition, continue to mix and react for 30 minutes, Material A is obtained;

[0065] (2) Under the condition that the temperature is 50° C., add 15 g of potassium persulfate aqueous solution with a mass fraction of 10% dropwise to the material A prepared in step (1), and the dropping time is 15 minutes; continue the mixing reaction afte...

Embodiment 2

[0068] (1) Add 50 g of pulping waste liquid and 325 g of deionized water into a 500 mL beaker, stir for 5 min, pass through an 80-mesh sieve, and collect the filtrate;

[0069] Add the above-mentioned filtrate into a four-necked flask with a condenser tube and a stirring rotor. At room temperature, add 5 g of polyacrylamide into the four-necked flask in six times and mix for 10 minutes to obtain a mixture of pulping waste liquid and polyacrylamide. mixture;

[0070] At a temperature of 50°C, add 10 g of 10% by mass ammonium persulfate aqueous solution dropwise to the mixture of pulping waste liquor and polyacrylamide for 10 minutes; after the dropwise addition, continue to mix and react for 30 minutes, Material A is obtained;

[0071] (2) Under the condition that the temperature is 50° C., add 15 g of potassium persulfate aqueous solution with a mass fraction of 10% dropwise to the material A prepared in step (1), and the dropping time is 15 minutes; continue the mixing react...

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Abstract

The invention discloses a flocculant as well as a raw material composition, a preparation method and application thereof. The raw material composition comprises the following components in parts by weight: 1 part of pulping waste liquid, 0.1-0.2 part of polyacrylamide, 0.05-0.1 part of an initiator and 0.1-0.2 part of a cross-linking agent, wherein the initiator comprises an initiator A and an initiator B, the initiator A and the initiator B are respectively and independently one or more of sodium persulfate, potassium persulfate, ammonium persulfate, a Fenton reagent and an azo initiator, and the initiator A and the initiator B are different substances; the pulping waste liquid is waste liquid generated in the process of preparing the high-yield paper pulp. The prepared flocculant is high in flocculation efficiency, capable of improving settleability of various substances in water and greatly reducing the COD value in wastewater, complete in flocculation, low in cost and free of secondary pollution.

Description

technical field [0001] The invention relates to a flocculant, its raw material composition, its preparation method and application. Background technique [0002] At present, the commonly used chemical flocculants are divided into two categories, one is inorganic flocculant represented by iron salt and aluminum salt, and the other is polymer flocculant represented by polyacrylamide. Although the use of chemical flocculants has a long history, there are still certain defects. For example, the flocculation effect of inorganic flocculants is not ideal, and polymer flocculants represented by polyacrylamide are highly toxic and easy to cause secondary pollution. [0003] The high-yield pulping technology has a good development prospect because of its high pulp yield and environmental friendliness. The high-yield pulp produced by high-yield pulping technology has almost twice the utilization rate of natural fibers than chemical pulp, and the pollution discharge is only 1 / 3 to 1 / 6 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/5263C02F1/56C02F2209/08
Inventor 施晓旦李燕金霞朝
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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