Production method for graphitized carbon black with high dispersibility and low resistivity

A low-resistivity, conductive carbon black technology, applied in the direction of fibrous fillers, can solve the problems of poor conductivity and achieve adjustable performance, obvious economic benefits, and stable quality

Inactive Publication Date: 2010-07-28
山西永东化工股份有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, most of the dynamic balance problems of conductivity (resistance value) and dispersion in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1: Refining coal tar at a flow rate of 800 kg / h at 205-390°C to remove quinoline insolubles such as pitch, moisture, ash, and free carbon. With the Zetasizer3000 laser particle size scatterometer manufactured by Malvern Instruments Ltd, the sampling speed is 50% in vibration; the dispersion pressure is 5×10^4Pa; the lens is 2.5mm, and the shading degree is 4%-10%. OCTAGON DIGITAL high-speed sieving machine; sieving time 2min; measured under the measuring condition of vibration amplitude 9. The refined coal tar is used as the carbon black feedstock oil, with a diameter distance of 0.785nm and a specific surface area of ​​101m 2 / g, the consistency test is 0.263-0.265. Its quality index is similar to that of ethylene tar.

[0013] The raw material oil of coal tar-based carbon black based on aromatics is cheap, and the induction period for forming conductive carbon black is short. In the carbon black furnace at 1830℃, 0.006%K 2 CO 3 , H 2 Under the catalytic cracking ...

Example Embodiment

[0014] Example 2: According to the coal tar-based carbon black feedstock oil flow rate of 780kg / h, in a multi-stage carbon black furnace at 1800°C, 0.01%K 2 CO 3 , H 2 Under the catalytic cracking of O mixture, after cracking, agglomeration, cooling, collection, and granulation, YD210 conductive carbon black is formed with dispersibility ++++ (nitrogen adsorption surface area 220m 2 / g), coloring strength 120, resistance value 100Ω.cm, DBP 220 (dibutyl phthalate method, ASTM D-2417-70) ml / 100mg, heating loss maximum 1.0%

[0015] Take 3 parts weight of 88g polyethylene, add YD210 conductive carbon black 5g, 10g, 15g respectively, after mixing on an internal mixer at 120℃ for 10min, press it into a 1mm thick molded sheet and cut it into 8cm×8cm The square material is tested at a room temperature of 25°C using the SDY24 four-probe tester from Guangzhou Institute of Semiconductor Materials. Its volume resistivity is 105, 102, and 100 respectively. The scanning electron microscope SEM...

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PUM

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Abstract

The invention provides a production method for graphitized carbon black with high dispersibility and low resistivity, aiming at stabilizing quality and regulating performance. The method of the invention comprises the following steps: mixing coal bed gas and coke oven gas according to weight ratio of 1:1; regulating the pressure to be 0.110-0.119MPa through a coal gas fan and an automatic regulating valve; regulating the flow by the automatic regulating valve according to the condition that the flow rate of heat supply gas is 100-600m3/h, mixing the coal bed gas, the coke oven gas and air, and utilizing the mixed gas as the heat supply gas to enter a combustion furnace for combustion; after heat generated after the combustion of the heat supply gas enters a throat pipe, atomizing the carbon black raw material oil added at the throat pipe part, wherein the flow rate of the atomized raw material oil in a carbon black furnace is 480-900kg/h; and adding a catalyst with the concentration of 0.01%-0.015% for cracking and gathering,, and carrying out cooling, collecting and granulating to form coal tar based carbon black.

Description

technical field [0001] The invention provides a production method of conductive carbon black with high dispersion and low resistivity. Background technique [0002] Carbon black is a semiconductor. Conductive carbon black is a high-performance carbon black whose critical concentration (threshold) is much larger than that of ordinary carbon black and whose resistivity is much smaller than that of ordinary carbon black when it is added to an insulating polymer to form a conductive network. Conductive carbon black has been increasingly used as a functional filler in plastics, and its new uses in scientific and technological fields such as capacitors, fuel pipes, fuel cells, and military aerospace jet devices are also increasing. However, the dynamic balance problems of conductivity (resistance value) and dispersion in multi-stage reactors encountered by domestic enterprises in production are mostly not well resolved. Contents of the invention [0003] The object of the prese...

Claims

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Application Information

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IPC IPC(8): C09C1/50
Inventor 刘东良周霞萍张巍刘东玉周华忠鄢福林
Owner 山西永东化工股份有限公司
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