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Lignin serial coal water slurry dispersing agent and preparation method thereof
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A lignin and dispersant technology, applied in fuel, liquid carbon-containing fuel, petroleum industry, etc., can solve the problems of limited sulfonation degree, high requirements for production equipment and conditions, and high price, and achieve low product cost and low price , The effect of improving molecular quality
Active Publication Date: 2014-08-27
DONGFANG ELECTRIC CORP LTD
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[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
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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] oxidizing agent 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 a lignin-based coal-water slurry dispersant and a preparation method thereof, belonging to the technical field of dispersants prepared from coal-water slurry. The dispersant includes the following raw material components in parts by weight: 1000 parts of alkali lignin, 20-50 parts of polyethylene glycol, 2-10 parts of carboxylic acid, 1-5 parts of concentrated sulfuric acid, 0.1-5 parts of hydroquinone 1 part, 20-60 parts of acrylic acid, 60-150 parts of vinyl monomer, 200-400 parts of sodium sulfite, 300-500 parts of acetaldehyde solution, 30-50 parts of oxidizing agent, and 10-20 parts of reducing agent. Compared with the prior art, the lignin-based coal-water slurry dispersant of the present invention uses alkali lignin as a raw material, which reduces the cost, and the average molecular weight of lignin is significantly improved, the hydrophilicity is obviously enhanced, and the dispersion effect is obviously improved; in addition, The product of the invention has low cost, simple preparation process, relatively common raw materials and wide sources, relatively low price, good modification effect, resource utilization of waste, and reduced environmental pollution.
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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