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TA (tannic acid) modifying additive and application to coal-water slurry preparation

A technology of tannic acid and additives, applied in the field of additives and new additives of coal-water slurry, can solve the problems of no stabilization, difficult coal particle dispersion, etc., and achieve the effects of good market potential, low price and simple installation.

Active Publication Date: 2018-12-28
HUBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of coal is mainly hydrophobic. If the structure of tannic acid is not modified and used directly as an additive to prepare coal slurry, it will be difficult to disperse the coal particles and have no stabilizing effect.

Method used

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  • TA (tannic acid) modifying additive and application to coal-water slurry preparation
  • TA (tannic acid) modifying additive and application to coal-water slurry preparation
  • TA (tannic acid) modifying additive and application to coal-water slurry preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Get 100ml of distilled water and dissolve 10g of tannic acid in a 250ml three-neck flask equipped with two constant pressure dropping funnels, then add 20ml of 30% H 2 o 2 , put the three-neck flask into an oil bath, set the temperature to 75°C, and react at a stirring speed of 300r / min for 0.5h. Add 16.93gSAS, 0.8gKPS and 0.3gNaHSO from two dropping funnels 3 , The reaction time is 3h. After the reaction is over, stop heating and stirring, cool to normal temperature, neutralize the yellow-brown product to pH=9 and filter out water-insoluble impurities to obtain a brown-black modified tannic acid solution, which is distilled under reduced pressure and used The additive (TAS) was obtained after washing with ethanol three times and drying at room temperature.

[0023] Performance test: Take a certain amount of pulverized coal from Shenyou No. 2 coal, use the amount of the above-mentioned additives as 0.2% of the mass of pulverized coal, and prepare a coal slurry with a...

Embodiment 2

[0027] Take 100ml of distilled water and dissolve 10g of tannic acid in a 250ml three-necked flask equipped with two constant pressure dropping funnels, then add a certain amount of 20ml of 30% H 2 o 2 , put the three-neck flask into an oil bath, set the temperature to 75°C, and react at a stirring speed of 300r / min for 0.5h. Add 12.76gSAS, 0.8gKPS and 0.3gNaHSO from two dropping funnels 3 , The reaction time is 3h. After the reaction is over, stop heating and stirring, cool to normal temperature, neutralize the yellow-brown product to pH=9 and filter out water-insoluble impurities to obtain a brown-black modified tannic acid solution, which is distilled under reduced pressure and used After washing with ethanol three times, the additive (TAS) was obtained after drying at normal temperature

[0028] According to the assay method of Example 1, the assay results are shown in Table 1.

Embodiment 3

[0030] Take 100ml of distilled water and dissolve 10g of tannic acid in a 250ml three-necked flask equipped with two constant pressure dropping funnels, then add a certain amount of 20ml of 30% H 2 o 2 , put the three-neck flask into an oil bath, set the temperature to 75°C, and react at a stirring speed of 300r / min for 0.5h. Add 8.47gSAS, 0.8gKPS and 0.3gNaHSO from two dropping funnels 3 , The reaction time is 3h. After the reaction is over, stop heating and stirring, cool to normal temperature, neutralize the yellow-brown product to pH=9 and filter out water-insoluble impurities to obtain a brown-black modified tannic acid solution, which is distilled under reduced pressure The additive (TAS) was obtained after washing with ethanol three times and drying at room temperature.

[0031] According to the assay method of Example 1, the assay results are shown in Table 1.

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Abstract

The invention provides a coal-water slurry modifying additive in the field of coal chemical. Cheap TA (tannic acid) is taken as a raw material, water is taken as a solvent, TA is oxidized by H2O2 firstly, then a certain amount of SAS (sodium allylsulfonate), KPS (potassium persulfate) and SB (sodium bisulfite) are added for graft copolymerization, and a novel TA dispersing agent is obtained. Comparison between infrared spectra of TAS (modified TA) and TA discovers that graft copolymerization of TAS succeeds. TA as the main raw material is naturally macromolecular, widely sourced and cheap, a synthesis process is simple, and the prepared coal-water slurry has better dispersity, viscosity, flowability and stability and has considerable market potential.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, and relates to an additive, in particular to a novel additive for coal water slurry. technical background [0002] Coal-water slurry is a low-pollution, high-efficiency, pipeline-transportable oil-substituting coal-based fluid fuel that is obtained through physical processing of about 67% coal, 32% water and 1% additive. It has changed the traditional way of burning coal, showing great advantages in environmental protection and energy saving. Especially in recent years, after adopting the technical route of recycling waste, the environmentally friendly coal-water slurry has been successfully developed, which can greatly improve the environmental protection benefits of coal-water slurry without increasing costs. Under the protection of my country's rich coal resources, coal water slurry has also become the most basic and economical clean energy to replace oil, gas and other energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F128/02C10L1/24C10L1/32
CPCC08F128/02C10L1/2431C10L1/326
Inventor 王石泉陈文贾艳梅吴慧敏黄志亮蔡忠张战利肖国
Owner HUBEI UNIV
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