Lignin-humic acid-based dispersing agent, preparation method and applications thereof

A humic acid and lignin technology, which is applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of increased production costs, complex preparation of raw materials and processes, and achieve cost savings, short preparation time, and improved dispersion effects and stability effects

Inactive Publication Date: 2020-05-01
NINGBO JINYUANDONG PETROCHEM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in the prior art, the dispersant with better dispersing and viscosity-reducing effect has relatively complicated preparation raw materials and processes, resulting in a significant increase in production cost; A simple lignin-humic acid-based dispersant, and discloses the preparation process and application of the dispersant

Method used

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  • Lignin-humic acid-based dispersing agent, preparation method and applications thereof
  • Lignin-humic acid-based dispersing agent, preparation method and applications thereof
  • Lignin-humic acid-based dispersing agent, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of lignin-humic acid base dispersant, its preparation method comprises the steps:

[0027] Dissolving lignin and humic acid in sequence into a solution with a pH range of 9, wherein 40 parts by weight of lignin and 40 parts by weight of humic acid. The solution was heated to 80°C, 10 parts by weight of sodium sulfite was added, and reacted for 3 hours. After the reaction, formaldehyde was added dropwise, wherein the amount of formaldehyde was 10 parts by weight, and the dropping time was 1 hour. After the dropwise addition, keep the temperature constant, and continue to react for 2 h;

[0028] Use sample A to do the pulping test, the pulping steps are as follows:

[0029] (1) Crush the lump coal of the test coal sample to about 2cm, place it in a blast drying oven and dry it at 110°C for 4 hours;

[0030] (2) Weigh a certain amount of dried lump coal in a coal mill, grind for a certain period of time, and adjust the coal powder particle size distribution throug...

Embodiment 2

[0035] A kind of lignin-humic acid base dispersant, its preparation method comprises the steps:

[0036] The lignin and humic acid are sequentially dissolved into a solution with a pH range of 10, wherein 40 parts by weight of lignin and 40 parts by weight of humic acid. The solution was heated to 90°C, 10 parts by weight of sulfamic acid was added, and reacted for 3 hours. After the reaction, acrylamide was added dropwise, wherein the amount of acrylamide was 10 parts by weight, and the dropping time was 1 hour. After the dropwise addition, keep the temperature constant, and continue to react for 2 h;

[0037] The pulping test was done with sample B, and the results are shown in Table 2.

[0038] Table 2

[0039]

Embodiment 3

[0041] A kind of lignin-humic acid base dispersant, its preparation method comprises the steps:

[0042] Dissolve lignin and humic acid sequentially into a solution with a pH range of 10, including NaOH, KOH, Ca(OH) 2 Solution, wherein lignin 40 weight parts, humic acid 40 weight parts. The solution was heated to 90°C, 10 parts by weight of chlorosulfonic acid was added, and reacted for 3 hours. After the reaction, glyoxal was added dropwise, wherein the dosage of glyoxal was 10 parts by weight, and the dropping time was 1 hour. After the dropwise addition, keep the temperature constant, and continue to react for 2 h;

[0043] Sample C was used for pulping test, and the results are shown in Table 3.

[0044] table 3

[0045]

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Abstract

The invention discloses a lignin-humic acid-based dispersing agent, a preparation method and applications thereof. The lignin-humic acid-based dispersing agent is prepared from the following components in parts by weight: 30 to 70 parts of lignin, 30 to 70 parts of humic acid, 1 to 30 parts of a sulfonating agent and 5 to 50 parts of a cross-linking agent. After the lignin-humic acid-based dispersing agent is applied, easy-to-flow, clean and stable coal water slurry can be obtained. The lignin-humic acid-based dispersing agent has the advantages of excellent performance and high performance price ratio and completely meets the national coal water slurry standard.

Description

technical field [0001] The invention relates to the field of dispersing coal water slurry, in particular to a lignin-humic acid-based dispersant and its preparation method and application. Background technique [0002] As an effective technology for the clean utilization of coal, coal water slurry gasification is mature and stable, and has been applied to many domestic coal chemical enterprises. At present, the development and application of coal water slurry technology has been listed in the "Industrial Structure Adjustment Encouraged projects in the Guidance Catalog (2019 Edition, Draft for Comments). Coal water slurry is an oil-substituting fuel prepared from about 60-70% of coal powder, 30-40% of water and about 1% of dispersant through material mixing and processing, and is directly burned by pumping into the gasification furnace, so that Realize efficient utilization of coal. [0003] The concentration of coal water slurry directly affects the combustion efficiency o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/18C10L1/12C10L1/185C10L1/224C10L1/20C10L1/222C10L1/32
CPCC10L1/10C10L1/1275C10L1/1802C10L1/1857C10L1/201C10L1/2225C10L1/224C10L1/326
Inventor 俎宇孙慧王石维宋成建段成华
Owner NINGBO JINYUANDONG PETROCHEM ENG TECH
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