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Lignin serial coal water slurry dispersing agent and preparation method thereof

A lignin and dispersant technology, which is applied in the field of lignin-based coal water slurry dispersant and its preparation, dispersant for preparing coal water slurry and its preparation, can solve the problem of high production equipment and condition requirements and limited sulfonation degree , high price and other issues, to achieve the effect of low price, low product cost and improved molecular quality

Active Publication Date: 2013-04-17
DONGFANG ELECTRIC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the price of lignosulfonate itself is higher than that of alkali lignin, and its sulfonation degree is also limited, and sulfonation is mostly carried out under high temperature and high pressure process, which requires higher production equipment and conditions

Method used

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  • Lignin serial coal water slurry dispersing agent and preparation method thereof
  • Lignin serial coal water slurry dispersing agent and preparation method thereof
  • Lignin serial coal water slurry dispersing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A lignin-based coal-water slurry dispersant, characterized in that it comprises the following raw material components in parts by weight:

[0052] Alkali lignin 1000 parts

[0053] Polyethylene glycol 20 parts

[0054] Carboxylic acid 2 parts

[0055] 1 part concentrated sulfuric acid

[0056] Hydroquinone 0.1 parts

[0057] Acrylic 20 parts

[0058] Vinyl monomer 60 parts

[0059] Sodium sulfite 200 parts

[0060] Acetaldehyde solution 300 parts

[0061] 30 parts of oxidizing agent

[0062] 10 parts of reducing agent.

Embodiment 2

[0064] A lignin-based coal-water slurry dispersant, characterized in that it comprises the following raw material components in parts by weight:

[0065] Alkali lignin 1000 parts

[0066] Polyethylene glycol 50 parts

[0067] Carboxylic acid 10 parts

[0068] Concentrated sulfuric acid 5 parts

[0069] 1 part hydroquinone

[0070] Acrylic 60 parts

[0071] Vinyl monomer 150 parts

[0072] Sodium sulfite 400 parts

[0073] Acetaldehyde solution 500 parts

[0074] Oxidant 50 parts

[0075] 20 parts of reducing agent.

Embodiment 3

[0077] A lignin-based coal-water slurry dispersant, characterized in that it comprises the following raw material components in parts by weight:

[0078] Alkali lignin 1000 parts

[0079] Polyethylene glycol 35 parts

[0080] Carboxylic acid 6 parts

[0081] 3 parts concentrated sulfuric acid

[0082] Hydroquinone 0.55 parts

[0083] Acrylic 40 parts

[0084] Vinyl monomer 105 parts

[0085] Sodium sulfite 300 parts

[0086] Acetaldehyde solution 400 parts

[0087] oxidizing agent 40 parts

[0088] 15 parts of reducing agent.

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Abstract

The invention relates to lignin serial coal water slurry dispersing agent and a preparation method thereof, and belongs to the technical field of dispersing agent which is prepared by coal water slurry. The dispersing agent comprises the following raw material components in parts by weight: 1,000 parts of alkali lignin, 20 to 50 parts of polyethylene glycol, 2 to 10 parts of carboxylic acid, 1 to 5 parts of concentrated sulfuric acid, 0.1 to 1 part of hydroquinone, 20 to 60 parts of acrylic acid, 60 to 150 parts of vinyl monomer, 200 to 400 parts of sodium sulfite, 300 to 500 parts of acetaldehyde solution, 30 to 50 parts of oxidant and 10 to 20 parts of reducing agent. Compared with the prior art, the lignin serial coal water slurry dispersing agent adopts the alkali lignin as a raw material, so that the cost is reduced, the average molecular mass of the lignin is remarkably improved, the hydrophily is obviously enhanced, and the dispersing effect is prominently improved; and in addition, the dispersing agent has the advantages of low cost, simple preparation technique, more generality of raw materials, wide sources of the raw materials, cheaper price and good modifying effect; and the resource utilization is implemented for wastes, so that the environmental pollution from the wastes is reduced.

Description

technical field [0001] The invention relates to a dispersant for preparing coal water slurry and its preparation method, more specifically, the present invention relates to a lignin-based coal water slurry dispersant and its preparation method, belonging to the dispersant for preparation of coal water slurry technology field. Background technique [0002] The coal water slurry dispersant is a chemical additive that must be added in the preparation process of coal water slurry, which can improve the fluidity, stability and slurry concentration of coal water slurry. In recent years, as the country vigorously promotes clean coal technology, coal water slurry has been widely used as fuel and wet gasification feedstock in industrial boilers and coal chemical industries. The demand for dispersants also continues to grow. [0003] At present, the commonly used coal water slurry dispersants in China mainly include sodium naphthalene sulfonate series and sodium lignosulfonate serie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/192C10L1/188C10L1/12C10L1/183C10L1/16C08F289/00C08F220/06C08F222/06C08F220/28C08F4/40C08H7/00
Inventor 刘江杨纯陈慧王晓亮
Owner DONGFANG ELECTRIC CORP LTD
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