阅读说明：本技术 一种适用于未漂化学浆的二元微粒助留体系 (Binary particle retention system suitable for unbleached chemical pulp ) 是由 吕亮 许在亮 侯发财 许燕飞 徐岩 于 2020-07-24 设计创作，主要内容包括：本发明提供了一种适用于未漂化学浆的二元微粒助留体系。该技术方案针对未漂化学浆的物性特点,对微粒助留体系的成分加以改进。具体来看,本发明包括：聚丙烯酰胺20～25份,高岭土12～16份,对苯二甲酸8～10份,硅藻土4～6份,羧甲基纤维素钠2～4份,透明质酸钠2～4份,壳聚糖1～3份,磷酸二氢钙1～3份,顺丁烯二酸1～3份,富马酸二甲酯1～3份。本发明摒弃了阳离子聚合物与无机阴离子胶体的常规配方,以聚丙烯酰胺和高岭土为核心成分,并添加了对苯二甲酸、硅藻土、羧甲基纤维素钠等成分,采用复配方式构建了本发明的微粒助留体系。本发明尤其适用于未漂化学浆,使助留助滤效果得到显著提升,具有突出的技术优势。(The invention provides a binary particle retention system suitable for unbleached chemical pulp. The technical scheme aims at the physical property characteristics of unbleached chemical pulp and improves the components of a particle retention system. Specifically, the present invention includes: 20-25 parts of polyacrylamide, 12-16 parts of kaolin, 8-10 parts of terephthalic acid, 4-6 parts of diatomite, 2-4 parts of sodium carboxymethylcellulose, 2-4 parts of sodium hyaluronate, 1-3 parts of chitosan, 1-3 parts of monocalcium phosphate, 1-3 parts of maleic acid and 1-3 parts of dimethyl fumarate. The invention abandons the conventional formula of cationic polymer and inorganic anionic colloid, takes polyacrylamide and kaolin as core components, and adds terephthalic acid, diatomite, sodium carboxymethylcellulose and other components, and adopts a compounding way to construct the particle retention system. The invention is especially suitable for unbleached chemical pulp, obviously improves the retention and drainage effects and has outstanding technical advantages.)

1. A binary particle retention system suitable for unbleached chemical pulp is characterized by comprising the following components in parts by weight: 20-25 parts of polyacrylamide, 12-16 parts of kaolin, 8-10 parts of terephthalic acid, 4-6 parts of diatomite, 2-4 parts of sodium carboxymethylcellulose, 2-4 parts of sodium hyaluronate, 1-3 parts of chitosan, 1-3 parts of monocalcium phosphate, 1-3 parts of maleic acid and 1-3 parts of dimethyl fumarate.

2. The binary particulate retention system for unbleached chemical pulp according to claim 1, further comprising 1 to 3 parts by weight of methanol.

3. The binary particle retention system for unbleached chemical pulp according to claim 1, further comprising 1 to 2 parts by weight of sodium benzoate.

4. The binary particle retention system suitable for unbleached chemical pulp according to claim 1, further comprising 1-2 parts by weight of montmorillonite powder.

5. The binary particle retention system for unbleached chemical pulp according to claim 1, characterized in that it further comprises 0.6 to 0.8 parts by weight of sodium citrate.

6. The binary particulate retention system for unbleached chemical pulp according to claim 1, characterized in that it consists of the following components in parts by weight: 23 parts of polyacrylamide, 14 parts of kaolin, 9 parts of terephthalic acid, 5 parts of diatomite, 3 parts of sodium carboxymethylcellulose, 3 parts of sodium hyaluronate, 2 parts of chitosan, 2 parts of monocalcium phosphate, 2 parts of maleic acid and 2 parts of dimethyl fumarate.

7. The binary particulate retention system for unbleached chemical pulp according to claim 1, characterized in that it consists of the following components in parts by weight: 23 parts of polyacrylamide, 14 parts of kaolin, 9 parts of terephthalic acid, 5 parts of diatomite, 3 parts of sodium carboxymethylcellulose, 3 parts of sodium hyaluronate, 2 parts of chitosan, 2 parts of monocalcium phosphate, 2 parts of maleic acid, 2 parts of dimethyl fumarate, 2 parts of methanol, 1.5 parts of sodium benzoate, 1.5 parts of montmorillonite powder and 0.7 part of sodium citrate.

Technical Field

The invention relates to the technical field of pulping and papermaking, in particular to a binary particle retention system suitable for unbleached chemical pulp.

Background

The particle retention technology appears in the early stage of the eighties of the twentieth century, achieves unexpected effects after being applied to a papermaking wet part, greatly improves retention of paper fine fibers and fillers and drainage performance of paper, and greatly improves paper evenness. Thus, this technology is gradually being valued and developed by the paper industry. In recent years, with the progress of high-speed, large-sized, twin-wire, and neutral paper making in paper machines, especially in recent years when waste paper and deinked pulp are used in large quantities, the fine fibers present in the waste pulp in large quantities make drainage of the paper stock difficult, the retention of the fibers deteriorates, the strength of the paper sheet decreases, the quality decreases, and the runnability of the paper machine deteriorates. Therefore, retention and drainage aid technology in the wet end of papermaking is becoming more and more important.

Conventional particulate retention techniques consist of cationic polymers and inorganic anionic colloidal particles, typical particulate retention systems include those consisting of colloidal silica and cationic starch; further, in recent years, montmorillonite-based retention aid systems, aluminum hydroxide-based retention aid systems, and the like have been developed. At present, the particle retention system can be used in the conventional papermaking process, and when specific paper pulp such as unbleached chemical pulp and the like is treated, the conventional particle retention system can hardly achieve the ideal retention and drainage effects.

Disclosure of Invention

The invention aims to provide a binary particle retention system suitable for unbleached chemical pulp, aiming at overcoming the technical defects of the prior art and solving the technical problem that the conventional particle retention system is difficult to be suitable for unbleached chemical pulp.

The invention also aims to solve the technical problem of further improving the retention and drainage effects of the particle retention system.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a binary particle retention system suitable for unbleached chemical pulp comprises the following components in parts by weight: 20-25 parts of polyacrylamide, 12-16 parts of kaolin, 8-10 parts of terephthalic acid, 4-6 parts of diatomite, 2-4 parts of sodium carboxymethylcellulose, 2-4 parts of sodium hyaluronate, 1-3 parts of chitosan, 1-3 parts of monocalcium phosphate, 1-3 parts of maleic acid and 1-3 parts of dimethyl fumarate.

Preferably, the paint also comprises 1-3 parts by weight of methanol.

Preferably, the detergent also comprises 1-2 parts by weight of sodium benzoate.

Preferably, the montmorillonite powder also comprises 1-2 parts by weight of montmorillonite powder.

Preferably, the detergent also comprises 0.6-0.8 weight part of sodium citrate.

Preferably, the binary microparticle retention aid system consists of the following components in parts by weight: 23 parts of polyacrylamide, 14 parts of kaolin, 9 parts of terephthalic acid, 5 parts of diatomite, 3 parts of sodium carboxymethylcellulose, 3 parts of sodium hyaluronate, 2 parts of chitosan, 2 parts of monocalcium phosphate, 2 parts of maleic acid and 2 parts of dimethyl fumarate.

Preferably, the binary microparticle retention aid system consists of the following components in parts by weight: 23 parts of polyacrylamide, 14 parts of kaolin, 9 parts of terephthalic acid, 5 parts of diatomite, 3 parts of sodium carboxymethylcellulose, 3 parts of sodium hyaluronate, 2 parts of chitosan, 2 parts of monocalcium phosphate, 2 parts of maleic acid, 2 parts of dimethyl fumarate, 2 parts of methanol, 1.5 parts of sodium benzoate, 1.5 parts of montmorillonite powder and 0.7 part of sodium citrate.

The invention provides a binary particle retention system suitable for unbleached chemical pulp. The technical scheme aims at the physical property characteristics of unbleached chemical pulp and improves the components of a particle retention system. Specifically, the present invention includes: 20-25 parts of polyacrylamide, 12-16 parts of kaolin, 8-10 parts of terephthalic acid, 4-6 parts of diatomite, 2-4 parts of sodium carboxymethylcellulose, 2-4 parts of sodium hyaluronate, 1-3 parts of chitosan, 1-3 parts of monocalcium phosphate, 1-3 parts of maleic acid and 1-3 parts of dimethyl fumarate. The invention abandons the conventional formula of cationic polymer and inorganic anionic colloid, takes polyacrylamide and kaolin as core components, and adds terephthalic acid, diatomite, sodium carboxymethylcellulose and other components, and adopts a compounding way to construct the particle retention system. The invention is especially suitable for unbleached chemical pulp, obviously improves the retention and drainage effects and has outstanding technical advantages.

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.