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Preparation method of compound modified starch coal water slurry dispersing agent

A composite modification, coal-water slurry technology, which can be used in liquid carbon-containing fuels, petroleum industry, fuels, etc., and can solve problems such as the decline of petroleum energy competitiveness and coal utilization efficiency

Inactive Publication Date: 2017-08-22
贵州工业职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the combustion process of coal-water slurry, the volatilization of water will take away part of the heat, resulting in a decrease in the utilization efficiency of coal and a decrease in competitiveness with petroleum energy

Method used

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  • Preparation method of compound modified starch coal water slurry dispersing agent
  • Preparation method of compound modified starch coal water slurry dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) The starch is made into a starch emulsion with a concentration of 35wt%, and then the sodium dodecylbenzenesulfonate solution with a concentration of 12wt% is added in a ratio of 0.07 by the molar ratio of sodium dodecylbenzenesulfonate to starch Mix in starch emulsion, adjust the pH value of the mixture to 11 with a sodium hydroxide solution with a concentration of 10wt%, pour it into a high-pressure reactor, and react for 2 hours at a temperature of 130°C and fully stirred to obtain dodecane Starch phenyl sulfonate;

[0018] (2) the starch dodecylbenzenesulfonic acid ester that step (1) obtains is cooled to 55 ℃ and after the pH value of the reaction system is adjusted to 11 with the sodium hydroxide solution of 10wt% or ammoniacal liquor, under stirring state Slowly add potassium permanganate solution with a concentration of 8wt% according to the addition of potassium permanganate as 6% of the dry weight of starch. After adding the potassium permanganate solution...

Embodiment 2

[0024] (1) The starch is made into a starch emulsion with a concentration of 30wt%, and then the menoctenyl succinic anhydride solution with a concentration of 10wt% is added to the starch emulsion at a ratio of 0.07 by the molar ratio of octenyl succinic anhydride and starch, and mixed, After adjusting the pH value of the mixture to 10 with a sodium hydroxide solution with a concentration of 8wt%, pour it into a high-pressure reactor, and react for 1.5 hours at a temperature of 120°C and in a fully stirred state to obtain starch octenyl succinate ;

[0025] (2) the octenyl succinic acid starch ester that step (1) obtains is cooled to 60 ℃ and after the pH value of the reaction system is adjusted to 10 with the sodium hydroxide solution of 20wt% or ammoniacal liquor, under stirring state, press Potassium permanganate is the add-on of 4% of starch dry basis weight and slowly adds concentration and is the potassium permanganate solution of 8wt%. After adding potassium permangana...

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Abstract

The invention discloses a preparation method of a compound modified starch coal water slurry dispersing agent. The preparation method comprises the steps of modifying starch by virtue of an esterifying agent with lipophilic groups to obtain esterified starch, breaking partial glycosyl in the starch to diminish starch molecules so as to increase the fluidity of the dispersing agent, simultaneously oxidizing primary hydroxyl groups in the starch into carboxyl so as to increase the hydrophily of the dispersing agent, and finally acquiring the compound modified starch coal water slurry dispersing agent with good dispersity. The compound modified starch coal water slurry dispersing agent is used for preparing coal water slurry, when the concentration of the coal water slurry reaches 69wt%, the apparent viscosity of the coal water slurry is still less than 1200mPa.s and is 1134mPa.s. The main raw material of the prepared compound modified starch coal water slurry dispersing agent is regenerative and non-toxic starch which is low in cost and wide in source; when the slurry dispersing agent is prepared, the energy consumption of the process is low, the cost of the auxiliary raw material is low, the use amount of the auxiliary raw material is low, and 'three wastes' are not emitted; the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a composite modified starch coal-water slurry dispersant, and belongs to the technical field of preparation of coal-water slurry dispersants. Background technique [0002] The overall characteristic of my country's energy is "rich in coal, less in gas, and lacking in oil". Coal resources account for more than 90% of my country's total energy reserves, and consumption accounts for more than 70% of total primary energy consumption. Due to the shortage of oil resources in our country and the sharp increase in the demand for oil resources year by year, the development of our country's economy is seriously restricted. Therefore, my country has formulated an energy policy of "replacing oil with coal" to reduce our country's dependence on oil resources. Because coal-water slurry can not only maintain the flammability of coal, but also has good fluidity and stability, and can be transported through pipelines, i...

Claims

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Application Information

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IPC IPC(8): C08B31/18C08B31/04C10L1/18C10L1/32
CPCC08B31/185C08B31/04C10L1/1802C10L1/326
Inventor 王成琼王振杰刘安荣卢义兵孙廷亮吴帮杰罗荣
Owner 贵州工业职业技术学院
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