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Preparation method and application of polymer retention filter aid containing phenylboronic acid functional group

A retention and drainage aid, phenylboronic acid-functional technology, applied in the field of papermaking, can solve the problems of weak binding force, unable to form stable flocculent precipitates, etc., to achieve low production cost, excellent winding and flocculation effects, and enhanced adhesion ability. Effect

Active Publication Date: 2014-06-18
LONGYOU COUNTY JINLONG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although polyvinylamine plays a certain role in flocculation and retention through hydrogen bonding and polymer bridging and entanglement in the papermaking process, its binding force with fine fiber components is weak, and it cannot Forms stable flocculent precipitates, which largely limits its use

Method used

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  • Preparation method and application of polymer retention filter aid containing phenylboronic acid functional group

Examples

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Effect test

Embodiment 1

[0025] A preparation method of a polymer retention and drainage aid containing phenylboronic acid functional group, the steps are as follows in parts by weight:

[0026] (1) Mixing: Mix 10g of polyvinylamine and 1000mL of water at room temperature, and fully stir to dissolve it; then add 10g of p-carboxyphenylboronic acid to fully dissolve it in the above solution to obtain a mixture;

[0027] (2) Coupling reaction: After 50 minutes, heat up to 40°C, add 0.1M dilute hydrochloric acid to adjust the pH value of the solution to 6.0, and slowly add 1-(3-dimethylaminopropyl)-3-ethyl carbon under the protection of nitrogen 10 g of diimine hydrochloride was stirred for 3 hours, cooled and discharged.

[0028] (3) Separation: Collect the reaction liquid and collect it into the regenerated cellulose dialysis membrane for separation. The separation time is 3 days, and then the solution is dried to a constant weight, and finally a polymer retention and drainage aid containing phenylboron...

Embodiment 2

[0033] A preparation method of a polymer retention and drainage aid containing phenylboronic acid functional group, the steps are as follows in parts by weight:

[0034] (1) Mixing: Mix 10g of polyvinylamine, 1000mL of water and 100mL of ethanol at room temperature, and stir well to dissolve; then add 5g of p-carboxyphenylboronic acid to fully dissolve it in the above solution to obtain a mixture ;

[0035] (2) Coupling reaction: After 90 minutes, heat up to 65°C, add acetic acid to adjust the pH value of the solution to 5.0, and slowly add 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide under nitrogen protection Hydrochloride 18g, stirred for 4h

[0036] After that, cool down and discharge.

[0037] (3) Separation: Collect the reaction liquid and collect it into the regenerated cellulose dialysis membrane for separation. The separation time is 2 days, and then the solution is dried to a constant weight, and finally a polymer retention and drainage aid containing phenylboronic...

Embodiment 3

[0041] A preparation method of a polymer retention and drainage aid containing phenylboronic acid functional group, the steps are as follows in parts by weight:

[0042] (1) Mixing: Mix 10g of polyvinylamine, 800mL of water and 25mL of methanol at room temperature, and fully stir to dissolve it; then add 4g of p-carboxyphenylboronic acid to fully dissolve it in the above solution to obtain a mixture ;

[0043] (2) Coupling reaction: After 60 minutes, heat up to 35°C, add 0.1M oxalic acid to adjust the pH value of the solution to 6.5, slowly add 5g of diisopropylcarbodiimide under nitrogen protection, stir for 2 hours, cool down and discharge; The purpose is to control the initiation of the reaction and reduce the formation of side reactants.

[0044] (3) Separation: Collect the reaction liquid and collect it into the regenerated cellulose dialysis membrane for separation. The separation time is 4 days, and then the solution is dried to a constant weight, and finally a polymer r...

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Abstract

The invention relates to a preparation method and application of a polymer retention filter aid containing a phenylboronic acid functional group and belongs to the technical field of papermaking. The preparation method is characterized by comprising the following steps of: mixing; carrying out coupling reaction; and separating to obtain the polymer retention filter aid containing the phenylboronic acid functional group. Compared with the existing general polymer retention filter aid, the retention filter aid applicable to the field of papermaking industry has the advantages that the retention effect is greatly improved, and the residual rate of fine filters and fillers in mother liquor can be greatly reduced under relatively small dosage; and with the use of the polymer retention filter aid, the load of papermaking wastewater treatment can also be effectively reduced.

Description

technical field [0001] The invention relates to a preparation method of a polymer retention and drainage aid containing a phenylboronic acid functional group, and belongs to the technical field of papermaking. Background technique [0002] Retention and drainage aids are a common papermaking chemical. Retention and drainage aids can increase the retention rate of pulp on the Internet during the papermaking process, especially for fine fibers and fillers. Therefore, the use of retention and drainage aids can save paper pulp, accelerate water filtration, reduce energy consumption, increase output, and save production costs. In addition, it can increase the dry and wet strength of the paper and improve the quality of the paper. And due to the reduction of fine fibers and fillers in the effluent, it is also beneficial to reduce the white water pollution load in the papermaking system and keep the felt clean so that the paper machine can run normally. [0003] At present, the ...

Claims

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Application Information

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IPC IPC(8): C08G73/04D21H21/10
Inventor 张丹龙柱
Owner LONGYOU COUNTY JINLONG PAPER
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