Method for preparing coal tar or coaltar pitch without quinoline insolubles

A technology of coal tar and coal tar pitch, which is applied in the field of preparing coal tar or coal pitch that does not contain quinoline insolubles, can solve problems such as difficult operation, increased volatility of organic matter, and recovery rate when consuming energy, and achieve simple process , Mild conditions, easy to operate effect

Active Publication Date: 2011-11-02
宁夏鑫华威能源科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The combined removal process is long, energy-consuming and time-consuming, and the recovery rate is poor; while the supercritical extraction technology is still in the exploratory stage
In short, there are many disadvantages in the current method for preparing coal tar pitch or tar without QI, such as the difficulty in operation and poor recovery rate brought by the filtration method; the interface between the solution and quinoline insolubles in the solvent method is not clear, and it is difficult to accurately handle the remaining solution. And it takes a long time; while the centrifugation method needs to consume a lot of energy, etc., and the removal of QI is not complete, the pollution is serious (the processing temperature is often 200-290 ° C, the volatility of organic compounds increases) and other defects

Method used

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  • Method for preparing coal tar or coaltar pitch without quinoline insolubles
  • Method for preparing coal tar or coaltar pitch without quinoline insolubles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 50g of high-temperature coal tar (the content of QI is 3.6 wt%) and put it in a 300ml glass beaker, add a solvent capable of dissolving high-temperature coal tar and 25mg of lauryltrimethylammonium chloride, and in general, dissolve 50g of high-temperature coal Tar can be dissolved by adding a solvent of equal volume ratio. The solvent can be one of light oil, phenol oil, naphthalene oil, washing oil, benzene and toluene, or a mixture of several. In the present embodiment, select 50ml of toluene, put in such as figure 1 In the shown beaker, the electrode made of conductive metal material or non-metallic material with a certain shape is connected with the power supply. In this embodiment, the electrode made of stainless steel is connected with the power supply. The power supply adopts a common power supply. Heat the coal tar to 50°C in a water bath, then turn on the power, and adjust the electric field strength to 7.5×10 4 V / m, stop heating after 1 hour of continuo...

Embodiment 2

[0016] Same as Example 1, get 50g of medium temperature coal tar pitch (the content of QI is 5.3 wt%) and place in a 300ml glass beaker, add 50ml of washing oil and 100mg of lauryltrimethylammonium chloride and put it into such as figure 1 In the container shown, connect the electrode made of stainless steel with the power supply, heat it to 80°C with an electric heating mantle, turn on the power supply, and adjust the electric field strength to 2.0×10 5 V / m, stop heating after 40 minutes of continuous action time, turn off the power switch, take out the electrode, transfer the coal tar pitch containing the solvent to the distillation device, and distill off the solvent at a temperature of 210°C under reduced pressure to obtain the treated For coal tar pitch, the method described in the national standard GB / T-2293-1997 was used to measure the content of quinoline insolubles. As a result, no QI was detected, that is, the QI content was lower than the detection limit of the assay...

Embodiment 3

[0018] With embodiment 1, get 50g middle temperature coal tar (the content of QI is 5.3wt%) and be placed in the glass beaker of 300ml, after adding the lauryl trimethyl ammonium chloride of 60ml benzene and 250mg, put into such as figure 1 In the container shown, connect the electrode made of copper material to the power supply, adjust the temperature to 10°C with an ice-water bath, turn on the power supply, and adjust the electric field strength to 3.0×10 5 V / m, stop heating after 1 hour of continuous action time, turn off the power switch, take out the electrode, transfer the coal tar containing solvent to a distillation device, and distill off the solvent at a temperature of 50°C under reduced pressure to obtain the treated Coal tar adopts the method described in the national standard GB / T-2293-1997 to measure quinoline insoluble content, and the existence of QI is not detected equally, that is, the QI content of the above-mentioned processed coal tar is lower than the lowe...

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Abstract

The invention relates to a method for preparing coal tar or coaltar pitch without quinoline insolubles, comprising the following steps of: adding a solvent and a surfactant which can cause the quinoline insolubles to be positively charged into coal tar or coaltar pitch, placing a mixture into a container provided with an electrode, electrifying for 20-60 minutes under the conditions that the electric intensity is 7.5*10<4>-3.0*10<5>V/m and temperature is 10-90 DEG C, taking out the electrode adhered with sediments, and carrying out vacuum reduced pressure distillation on the coal tar or coaltar pitch in the container to remove the added solvent, thus coal tar or coaltar pitch without quinoline insolubles is obtained. The method provided by the invention has the characteristics of low energy consumption, mild conditions, simple process and environmental protection property and is easy for industrialization production.

Description

technical field [0001] The present invention is related to the preparation method of coal tar or coal pitch, more specifically, after adding solvent and surfactant to increase the electrical properties and dispersibility of quinoline insolubles, the quinoline insolubles are deposited by the principle of electrostatic adsorption A method for preparing coal tar or coal tar pitch free of quinoline insoluble matter to achieve removal on the electrode. technical background [0002] Coal tar and coal tar pitch are by-products of coal processing and come from a wide range of sources. At present, it is mainly used for paving, waterproof materials and coking adhesives. Due to the complex composition of coal tar or coal pitch, when it is used as a raw material for various carbon materials such as needle coke, carbon fiber and impregnating agent, it must be pretreated to meet the conditions for further processing. In the pretreatment process, how to make tar or pitch without quinolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/00C10C3/00
Inventor 曹青靳利娥李月仙张怀平
Owner 宁夏鑫华威能源科技有限公司
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