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Papermaking retention aid and preparation method and application thereof

A technology of retention aids and dissolution aids, applied in the field of paper retention aids and paper retention aids, can solve the problems of insufficient cationic charge density, low molecular weight, short-cut deinking and sticky matter control, etc., to achieve Good social and economic benefits, solve the effect of improving the conductivity and slurry retention rate

Inactive Publication Date: 2019-07-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The rapid development of the paper industry, especially the recycling of waste paper, is of great significance in saving resources and improving the environment. Waste paper pulp has the characteristics of high electrical conductivity and high anion, and there are short pulp fibers, deinking and gumming. Sticky matter control and other three major problems, traditional papermaking retention aids have insufficient cationic charge density and low molecular weight, especially for solving the problems of anionic garbage and micro stickies in the waste paper pulp making system with high conductivity and high negative charge limitations, we need to develop new retention aids with high cationic charge density and higher molecular weight to meet the actual needs of paper production

Method used

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  • Papermaking retention aid and preparation method and application thereof
  • Papermaking retention aid and preparation method and application thereof
  • Papermaking retention aid and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The radical initiator that embodiment 1, embodiment 4 and embodiment 5 adopt is the composition of ammonium persulfate / sodium bisulfite, and the mol ratio of ammonium persulfate and sodium bisulfite is respectively 1:1, 3:1 , 4:1;

[0052] Sealing and heat preservation: After reaching the temperature, seal the reaction system, keep it warm for a period of time, and then take it out after cooling;

[0053]Product extraction: add excess ethanol to the cooled liquid phase and stir, then filter the filter residue, wash, dry and grind the filter residue to obtain the product, the product solid content is ≥ 88%, and the molecular weight is about 6 million to 8 million .

[0054] The product can be used as retention aid in papermaking, etc.

[0055] Wherein, the reaction raw material that embodiment 1~embodiment 5 adopts is shown in Table 1:

[0056] The reaction raw materials that table 1 embodiment 1~embodiment 5 adopts

[0057]

[0058] The ratio between each raw mat...

Embodiment 2

[0066] The reaction formula reference of embodiment 2 figure 2 .

[0067] The performance test method of retention aid is as follows:

[0068] (1) Sample preparation

[0069] 1. Experimental slurry: slurry without adding chemicals.

[0070] 2. Experimental drugs:

[0071] ① The samples obtained in Example 1 to Example 5.

[0072] ②Other products in the same industry: Comparative Example 1 - FO4910PG0 from Essen, France; Comparative Example 2 - P182 from BASF, Germany; Comparative Example 3 - Zhejiang Xinyong 8163.

[0073] 3. Dissolved concentration of experimental medicine: 0.1%.

[0074] 4. Experimental instrument: BTG DFR-05 dynamic water filter

[0075] (two), sample test

[0076] In the case of selecting the same dosage, the DFR-05 dynamic water filtration instrument was used to simulate the production conditions of the paper machine in the laboratory to test the drainage performance of the pulp and evaluate the retention effect of the papermaking chemicals. The ...

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Abstract

The invention relates to a papermaking retention aid and a preparation method and application thereof, and belongs to the technical field of aids to be added to pulps. The papermaking retention aid ismade by polymerizing a nonionic biopolysaccharide having molecular weight of 3000000-5000000, cations and alkenyl amide having unsaturated double bonds. The preparation method of the papermaking retention aid comprises the steps of polymerizing; sealing to hold temperature, and extracting a product. The papermaking retention aid prepared herein by means of grafting and polymerization of the biopolysaccharide has excellent properties, is widely applicable to the market and has good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of additives added to pulp, and in particular relates to a paper-making retention aid, a preparation method of the paper-making retention aid and an application thereof. Background technique [0002] In the technical field of papermaking, retention aids are used to improve the retention rate of fine fibers and fillers in paper; it is especially suitable for paper machines that adopt white water closed circulation systems or have white water recovery. The addition of retention aids can change the paper pulp The flocculation state of the material can be improved, so as to reduce the loss of fibers and fillers and reduce the pollution load. [0003] Polyacrylamides of different ionic types are currently one of the representative retention aids for papermaking. For example, the Chinese invention patent with application number CN201110297082.7 discloses a retention aid for papermaking, which includes cationic ret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F220/34C08F220/60C08F220/54C08F226/02D21H21/10D21H17/45
CPCC08F251/00D21H17/455D21H21/10C08F220/56C08F220/34C08F220/54C08F226/02C08F220/60
Inventor 周秀云胡阳肖杰徐禄波陈国飞方省众
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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