Sulfomethylated alkali lignin-formaldehyde-sulfonated acetone polymer coal water slurry additive

A technology of sulfomethylated alkali lignin and sulfonated acetone, which is applied in the field of coal water slurry dispersants, can solve the problems of poor dispersion and viscosity reduction performance, weak adsorption of additives and coal particle surfaces, poor stability of coal water slurry, etc. problems, to achieve the effect of increasing the degree of sulfonation and molecular weight, good product stability, and improving product dispersibility and stability

Active Publication Date: 2012-07-18
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many studies on the preparation of coal-water slurry additives with alkali lignin as raw material, but there are problems such as weak adsorption of additives and coal particles, poor dispersion and viscosity reduction performance, and poor stability of coal-water slurry itself.

Method used

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  • Sulfomethylated alkali lignin-formaldehyde-sulfonated acetone polymer coal water slurry additive
  • Sulfomethylated alkali lignin-formaldehyde-sulfonated acetone polymer coal water slurry additive
  • Sulfomethylated alkali lignin-formaldehyde-sulfonated acetone polymer coal water slurry additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) The raw material components used in this embodiment are as follows:

[0027] Alkali lignin (extracted from kraft eucalyptus pulp black liquor): 134 kg;

[0028] Sodium metabisulfite: 27 kg;

[0029] Sodium sulfite: 53.5 kg;

[0030] Sodium hydroxide: 1.5 kg

[0031] Acetone: 20 kg;

[0032] Formaldehyde (37%): 80 kg;

[0033] Water: 684 kg.

[0034] 2) Preparation process steps and process parameters:

[0035] The preparation of the present invention is carried out under normal pressure:

[0036] (a) Add 20 kg of formaldehyde solution to a reactor containing 134 kg of alkali lignin and 310 kg of water, raise the temperature to 40°C, and react for 3.0 hours, then add 27 kg of sodium metabisulfite, raise the temperature to 95°C, and react After 2.0 hours, sulfomethylated alkali lignin is produced.

[0037] (b) Add 374 kg of water, 0.7 kg of sodium hydroxide, and 20 kg of acetone into the reactor in sequence, stir evenly, add 53.3 kg of sodium sulfite, raise the...

Embodiment 2

[0038] 1) The raw material components used in the present embodiment are as follows:

[0039] Alkali lignin (extracted from alkaline bamboo and bagasse pulp black liquor, the mass ratio of bamboo and bagasse is 1:3): 115 kg;

[0040] Sodium bisulfite: 23 kg;

[0041] Sodium sulfite: 46 kg;

[0042] Potassium hydroxide: 1.0 kg

[0043] Acetone: 57 kg;

[0044] Formaldehyde (37%): 86 kg;

[0045] Water: 672 kg.

[0046] 2) Preparation process steps and process parameters:

[0047] The preparation of the present invention is carried out under normal pressure:

[0048] (a) Add 20 kg of formaldehyde solution to a reactor containing 115 kg of alkali lignin and 200 kg of water, raise the temperature to 55°C, and react for 3.0 hours, then add 23 kg of sodium bisulfite, and raise the temperature to 100°C , After 2.0h of reaction, sulfomethylated alkali lignin was produced.

[0049] (b) Add 472 kg of water, 1.0 kg of potassium hydroxide, and 57 kg of acetone to the reactor in sequ...

Embodiment 3

[0050] 1) The raw material components used in the present embodiment are as follows:

[0051] Alkali lignin (extracted from soda birch pulp black liquor): 166 kg;

[0052] Sodium sulfite: 70 kg;

[0053] Sodium phosphate: 8 kg

[0054] Acetone: 104 kg;

[0055] Formaldehyde (37%): 54 kg;

[0056] Water: 598 kg.

[0057] 2) Preparation process steps and process parameters:

[0058] The preparation of the present invention is carried out under normal pressure:

[0059] (a) Add 18 kg of formaldehyde solution to a reactor containing 166 kg of alkali lignin and 278 kg of water, raise the temperature to 55°C, and react for 3.0 hours, then add 23 kg of sodium sulfite, raise the temperature to 90°C, and react for 2.0 After h, make sulfomethylated alkali lignin.

[0060] (b) Add 320 kg of water, 8 kg of sodium phosphate, and 104 kg of acetone into the reactor in sequence, stir evenly, add 47 kg of sodium sulfite, raise the temperature to 65°C, and react for 2.0 hours, then add t...

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Abstract

The invention discloses a sulfomethylated alkali lignin-formaldehyde-sulfonated acetone polymer coal water slurry additive and a preparation method thereof. The additive comprises the following components, by weight, 11.5-20.0 parts of alkali lignin, 4.9-10.0 parts of a sulfonating agent, 0.1-0.8 parts of an alkaline regulator, 4.5-10.0 parts of acetone, 5.4-13.5 parts of formaldehyde, and 47.3-67.2 parts of water. The preparation method comprises the following steps: 1, reacting the alkali lignin with a certain amount of formaldehyde and a certain amount of the sulfonating agent to prepare sulfomethylated alkali lignin; and 2, carrying out a catalytic sulfonation reaction on acetone by the alkaline regulator and the sulfonating agent to obtain a sulfonated acetone prepolymer, adding the prepared sulfomethylated alkali lignin and a formaldehyde solution, and carrying out a polymerization reaction to form the coal water slurry additive containing sulfo, hydroxy and alkyl active groups. So the product and the product stability are improved. The additive of the invention has the advantages of simple method, easily available raw materials, short production period, good stability, nontoxicity, no seasonal and regional restriction of the use, convenient storage and transportation, and realization of the high value utilization of lignin.

Description

technical field [0001] The invention belongs to the field of coal water slurry dispersants, in particular to a sulfomethylated alkali lignin-formaldehyde-sulfonated acetone polymer coal water slurry additive and a preparation method thereof. Background technique [0002] Coal-water slurry has the advantages of high concentration, good rheology, long-term storage without precipitation, can be pumped and transported like fuel oil, atomized and burned, and can completely replace fuel oil, so it is developing rapidly. But to prepare high-concentration coal-water slurry, it is very important to choose suitable and efficient additives such as dispersant and stabilizer. The introduction of a small amount of additives can make the fusion of water and coal better, reduce its viscosity, increase its fluidity, and make it more stable. Among them, the coal water slurry dispersant can be divided into anionic type, cationic type, amphoteric type and nonionic type, and its price ratio is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/24C10L1/185
Inventor 刘明华陈晓梅陈珍喜
Owner FUZHOU UNIV
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