阅读说明：本技术 一种梳型水煤浆分散剂及其制备方法与应用 (Comb-type coal water slurry dispersant, and preparation method and application thereof ) 是由 马丽涛 董翠平 尤健健 李帅 杨道顺 于 2019-11-19 设计创作，主要内容包括：本发明提供了一种梳型水煤浆分散剂及其制备方法与应用,梳型水煤浆分散剂包括以下重量份原料：马来酸酐10-50份、双氧水2-4份、去离子水380-550份、3M 0.5-1.5份、单体220-350份、VC 0.5-2份、甲基丙烯酸15-27份、羟乙酯5-10份、液碱5-18份。本发明利用马来酸酐代替部分聚醚单体改性梳型水煤浆分散剂,产品中含有较多的羟基、羧基、羰基、以及酯基、磺酸基、聚氧乙烯基等活性基团作用于水煤浆颗粒,增强了水煤浆的分散效果,为水煤浆分散剂的研究开辟了新的方向。(The invention provides a comb-type coal water slurry dispersing agent and a preparation method and application thereof, wherein the comb-type coal water slurry dispersing agent comprises the following raw materials in parts by weight: 10-50 parts of maleic anhydride, 2-4 parts of hydrogen peroxide, 550 parts of deionized water 380-. The invention utilizes maleic anhydride to replace part of polyether monomer modified comb-type coal water slurry dispersing agent, and the product contains more hydroxyl, carboxyl, carbonyl, ester group, sulfonic group, polyoxyethylene group and other active groups to act on coal water slurry particles, thereby enhancing the dispersing effect of the coal water slurry and opening up a new direction for the research of the coal water slurry dispersing agent.)

1. The comb-type coal water slurry dispersing agent is characterized by comprising the following raw materials in parts by weight: 10-50 parts of maleic anhydride, 2-4 parts of hydrogen peroxide, 550 parts of deionized water 380-.

2. The comb-type coal water slurry dispersant according to claim 1, wherein the concentration of the hydrogen peroxide is 25-30 wt%, and the concentration of the alkali solution is 25-35 wt% and is sodium hydroxide solution.

3. The comb-type coal water slurry dispersant according to claim 1, wherein said 3M is 3-mercaptopropionic acid, and the monomer is methacrylic polyoxyethylene ether.

4. The comb-type coal water slurry dispersant according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 30 parts of maleic anhydride, 3 parts of 27 wt% hydrogen peroxide, 500 parts of deionized water, 1 part of 3-mercaptopropionic acid, 300 parts of methyl propenyl polyoxyethylene ether, 0.7 part of VC, 23 parts of methacrylic acid, 6.5 parts of hydroxyethyl ester and 13 parts of 32 wt% sodium hydroxide solution.

5. The comb-type coal water slurry dispersant according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 50 parts of maleic anhydride, 2.5 parts of 28 wt% hydrogen peroxide, 510 parts of deionized water, 0.9 part of 3-mercaptopropionic acid, 290 parts of methyl propenyl polyoxyethylene ether, 0.66 part of VC, 18 parts of methacrylic acid, 7 parts of hydroxyethyl ester and 18 parts of 30 wt% sodium hydroxide solution.

6. The preparation method of the comb-type coal water slurry dispersant according to any one of claims 1 to 5, which is characterized by comprising the following steps:

(1) preparing A, B materials: the material A is 130-170 parts of deionized water, 3M and VC which are uniformly mixed, and the material B is 60-100 parts of deionized water, methacrylic acid and hydroxyethyl ester which are uniformly mixed;

(2) adding the monomer, maleic anhydride and the rest deionized water into a reactor, stirring and mixing uniformly, adding hydrogen peroxide, continuing stirring for 8-12min, and dripping A, B materials into the reactor;

(3) and (3) adding A, B materials dropwise, then continuing to react for 0.5-1.5h, adding liquid alkali, and adjusting the pH value to 6-7 to obtain the comb-type coal water slurry dispersing agent.

7. The method for preparing the sodium styrene sulfonate modified comb-type coal water slurry dispersing agent according to claim 6, wherein the material A is dripped for 2-5h and the material B is dripped for 1.5-4h in the step (2).

8. The application of the comb-type coal water slurry dispersing agent of any one of claims 1 to 5 in preparing coal water slurry, wherein the comb-type coal water slurry dispersing agent can be used for the coal water slurry independently, and can also be used after being compounded with other dispersing agents and soda according to a certain proportion.

Technical Field

The invention relates to the technical field of coal water slurry additives, in particular to a comb-type coal water slurry dispersing agent and a preparation method and application thereof.

Background

The coal water slurry is produced in the international oil crisis period at the end of the 70 s in the 21 st century, is a high and new technology product for planning to replace petroleum and utilizing coal, and mainly comprises about 60-70% of coal, about 30-40% of water and a small amount of water coal slurry additive, has good fluidity and stability, and has an appearance similar to that of heavy oil. The coal water slurry technology is characterized in that solid coal is converted into liquid coal-based fuel through a physical process, and the liquid coal-based fuel has good combustion characteristics and partial advantages of heavy oil, so that the solid coal-based fuel can be applied to industries such as power generation and the like instead of the heavy oil, and the coal water slurry is a novel clean fuel for replacing oil, which is simple in preparation process, easy to transport and store, safe and reliable in general. The dispersant is an important additive in the preparation process of the coal water slurry, and mainly has the functions of changing the interfacial property of coal water, promoting the coal particles to disperse in water and ensuring that the coal body has good rheological property.

The dispersant is mainly anionic, cationic and nonionic, and the anionic and nonionic are mainly used. Anionic dispersants can be classified into synthetic organic polymer dispersants and natural polymer modified dispersants. Wherein the natural polymer modified dispersant mainly comprises a lignin dispersant and a humic acid dispersant; the synthetic organic polymer dispersants mainly include naphthalenesulfonate, polyolefinic sulfonic acid, and polycarboxylate. The humic acid series dispersants have the characteristics of strong dispersing performance, can be used independently, but have poor stability and hydrophilicity of formed pulp. The lignosulfonate dispersant has the advantages of wide sources and good stability, and has the disadvantages of high pulping viscosity and poor pulp fluidity. The naphthalene sulfonate polymer series with various substituent groups has the characteristics of wide edible range, good dispersibility, strong viscosity reducing effect and poor slurry stability. The polyolefin series dispersant has better dispersion stability for low-ash coal water slurry, but the molecular mass and the distribution thereof need to be strictly controlled. Polycarboxylic acid series dispersants, such as polycyclic polycarboxylic acids, polycarboxylates, polyphosphates, hydroxybenzoic acid polymer sodium salts and the like, have both dispersing and stabilizing functions, but the slurry flowability is not good. The nonionic dispersant is mainly polyoxyethylene series and polyoxyethylene series, and has the advantages of easy regulation and control of hydrophilic and lipophilic property and relative molecular mass, collection of influence of water quality and soluble matter in coal, no need of adding stabilizer, no need of adding defoaming agent, and suitability for preparing high-concentration water-coal slurry.

The coal water slurry dispersing agent is one of important raw materials of the coal water slurry technology, and the problems of high production and use cost, non-ideal dispersing effect, poor stability and hydrophilicity and the like exist at present, so that a synthetic method of a novel coal water slurry dispersing agent and a synthetic raw material of the novel coal water slurry dispersing agent are searched and developed, and the method has positive significance for promoting the leap-over development of the coal water slurry technology in China.

Disclosure of Invention

The invention aims to make up the defects of the prior art and provides a comb-type coal water slurry dispersing agent, a preparation method and application thereof.

In order to achieve the purpose, the invention is realized by the following scheme:

the invention provides a comb-type coal water slurry dispersing agent which comprises the following raw materials in parts by weight: 10-50 parts of maleic anhydride, 2-4 parts of hydrogen peroxide, 550 parts of deionized water 380-.

Preferably, the concentration of the hydrogen peroxide is 25-30 wt%, and the alkali liquor is a sodium hydroxide solution with the concentration of 25-35 wt%.

Preferably, 3M is 3-mercaptopropionic acid and the monomer is methacrylic polyoxyethylene ether.

Preferably, the feed comprises the following raw materials in parts by weight: 30 parts of maleic anhydride, 3 parts of 27 wt% hydrogen peroxide, 500 parts of deionized water, 1 part of 3-mercaptopropionic acid, 300 parts of methyl propenyl polyoxyethylene ether, 0.7 part of VC, 23 parts of methacrylic acid, 6.5 parts of hydroxyethyl ester and 13 parts of 32 wt% sodium hydroxide solution.

Preferably, the feed comprises the following raw materials in parts by weight: 50 parts of maleic anhydride, 2.5 parts of 28 wt% hydrogen peroxide, 510 parts of deionized water, 0.9 part of 3-mercaptopropionic acid, 290 parts of methyl propenyl polyoxyethylene ether, 0.66 part of VC, 18 parts of methacrylic acid, 7 parts of hydroxyethyl ester and 18 parts of 30 wt% sodium hydroxide solution.

The invention also provides a preparation method of the comb type coal water slurry dispersing agent, which comprises the following steps:

(1) preparing A, B materials: the material A is 130-170 parts of deionized water, 3M and VC which are uniformly mixed, and the material B is 60-100 parts of deionized water, methacrylic acid and hydroxyethyl ester which are uniformly mixed;

(2) adding the monomer, maleic anhydride and the rest deionized water into a reactor, stirring and mixing uniformly, adding hydrogen peroxide, continuing stirring for 8-12min, and dripping A, B materials into the reactor;

(3) and (3) adding A, B materials dropwise, then continuing to react for 0.5-1.5h, adding liquid alkali, and adjusting the pH value to 6-7 to obtain the comb-type coal water slurry dispersing agent.

Preferably, the material A is dripped for 2-5h in the step (2), and the material B is dripped for 1.5-4 h.

The invention also provides application of the comb type coal water slurry dispersing agent in preparation of the coal water slurry, and is characterized in that the comb type coal water slurry dispersing agent can be independently used for the coal water slurry, and can also be used after being compounded with other dispersing agents and sodium carbonate according to a certain proportion.

The invention has the beneficial effects that:

1. the invention utilizes maleic anhydride to replace part of polyether monomer modified comb-type coal water slurry dispersing agent, and the product contains more hydroxyl, carboxyl, carbonyl, ester group, sulfonic group, polyoxyethylene group and other active groups to act on coal water slurry particles, thereby enhancing the dispersing effect of the coal water slurry and opening up a new direction for the research of the coal water slurry dispersing agent.

2. The invention uses maleic anhydride as a small monomer to replace part of polyether monomers, finds a new raw material source for the comb type coal water slurry dispersing agent, and is beneficial to the dispersibility and stability of the coal water slurry.

3. The product of the invention is easy to form hydrogen bonds with the surface of coal particles due to the carboxyl grafted by maleic anhydride, and simultaneously reduces the hydrophobicity of the surface of the coal particles, thereby reducing the viscosity of the coal water slurry.

4. Compared with the comb type coal water slurry dispersing agent without maleic anhydride, the product of the invention has better dispersibility, stability and adaptability.

5. The coal water slurry prepared by the invention has low production cost, can act on the coal water slurry alone to play a good dispersing role, and the dispersing effect, the adaptability and the stability of the product can be greatly improved when the coal water slurry is compounded with other dispersing agents (such as naphthalene water reducing agents, aliphatic water reducing agents, lignin and the like) and soda ash according to a certain proportion compared with the single use.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.