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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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Problems solved by technology

However, most of the dynamic balance problems of conductivity (resistance value) and dispersion in multi-stage reactors encountered by domestic enterprises in production have not been well resolved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: According to the flow rate of 800kg / h, coal tar is refined at 205-390° C., and quinoline insolubles such as pitch, moisture, ash, and free carbon are removed. Through Zetasizer3000 laser particle size scattering instrument of Malvern Instruments Ltd, the vibrating sampling speed is 50%; OCTAGON DIGITAL high-speed screening machine; screening time 2min; measured under the conditions of vibration amplitude 9, the refined coal tar is used as carbon black raw material oil, diameter distance 0.785nm, specific surface area 101m 2 / g, consistency detection 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 mainly composed of aromatic hydrocarbons is cheap, and the induction period for forming conductive carbon black is short. 2 CO 3 、H 2 Under the catalytic cracking of O mixture, conductive carbon black with higher conductivity (low resistivity) and high dispersibility can be prod...

Embodiment 2

[0014] Embodiment 2: by the coal tar base carbon black raw material oil flow rate of 780kg / h, in multistage type carbon black furnace 1800 ℃, 0.01%K 2 CO 3 、H 2 Under the catalytic cracking of O mixture, through cracking, aggregation, cooling, collection, and granulation, YD210 conductive carbon black is formed, with dispersibility ++++ (nitrogen adsorption surface area 220m 2 / g), tinting strength 120, resistance value 100Ω.cm, DBP 220 (dibutyl phthalate method, ASTM D-2417-70) ml / 100mg, maximum heating loss 1.0%

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

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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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