It is provided a process for producing a purified carbon black with a reduced content of oxy-polycyclic aromatic hydrocarbons, the process including: (a) providing a carbon black including an initial content of oxy-polycyclic aromatic hydrocarbons of 1 ppm or more, (b) treating the carbon black including an initial content of oxy-polycyclic aromatic hydrocarbons with an extraction agent including carbon dioxide in a supercritical state to extract at least a portion of the oxy-polycyclic aromatic hydrocarbons from the carbon black, and (c) removing the extraction agent including the extracted oxy-polycyclic aromatic hydrocarbons from the carbon black to obtain a purified carbon black with a lower content of oxy-polycyclic aromatic hydrocarbons than the initial content of oxy-polycyclic aromatic hydrocarbons. It is furthermore provided a carbon black obtained through said production process and articles made therefrom.

A non-ASTM low hysteresis carbon black chemically treated, and surface coated with a compound comprising at least one amine group and at least one thiol group, and/or di- and/or polysulfidic linkage is herein disclosed. The surface modified low hysteresis carbon blacks are post treated to remove excess surface modified compound to form refined surface modified low hysteresis carbon blacks.

A non-ASTM low hysteresis carbon black chemically treated, and surface coated with a compound comprising at least one amine group and at least one thiol group, and/or di- and/or polysulfidic linkage is herein disclosed. The surface modified low hysteresis carbon blacks are post treated to remove excess surface modified compound to form refined surface modified low hysteresis carbon blacks.

A method for efficiently removing non-magnetic foreign material, from a carbonaceous material dispersion in which carbonaceous material particles are dispersed in a dispersing medium, includes applying the dispersion to a primary filter a specified number of times in circulation, the primary filter including at least one filter device; and applying the dispersion treated with the primary filter to a secondary filter a single time, the secondary filter including at least two filter devices arranged in series. Each respective filter device to be used satisfying following conditions: (a) a variation of cumulative undersize distribution Q [%] with respect to a reference particle diameter and a variation of non-volatile content, before and after passing the carbonaceous material dispersion, being not more than 0.1%, respectively; and (b) a removal rate of particles with a threshold particle diameter being not less than 20%.

A method for efficiently removing non-magnetic foreign material, from a carbonaceous material dispersion in which carbonaceous material particles are dispersed in a dispersing medium, includes applying the dispersion to a primary filter a specified number of times in circulation, the primary filter including at least one filter device; and applying the dispersion treated with the primary filter to a secondary filter a single time, the secondary filter including at least two filter devices arranged in series. Each respective filter device to be used satisfying following conditions: (a) a variation of cumulative undersize distribution Q [%] with respect to a reference particle diameter and a variation of non-volatile content, before and after passing the carbonaceous material dispersion, being not more than 0.1%, respectively; and (b) a removal rate of particles with a threshold particle diameter being not less than 20%.

The present invention relates to modified carbon black and a production method therefor, a resin composition and copper clad laminate. The modified carbon black comprises carbon black and a modified group; the surface of the carbon black has an acyl chloride group; the modified group is formed by a modified macromolecule and the acyl chloride group undergoing a grafting reaction; and the modified macromolecule is an alcohol macromolecule.

Provided is a carbon black composition for coloring containing carbon black and fulvic acid, wherein the carbon black contains a hydrophilic functional group.

The present disclosure discloses a rubber filler, a rubber composite including the same, a preparation method therefor, and use thereof. The rubber filler includes polydivinylbenzene microspheres and polydopamine-modified white carbon black loaded on the polydivinylbenzene microspheres; wherein the mass ratio of the polydivinylbenzene microspheres to the polydopamine-modified white carbon black is 1:(0.5-20). The rubber composite includes: a solution polymerized crude rubber and the rubber filler; wherein the rubber filler is added in an amount of 10-60 wt % of the dry basis mass of the solution polymerized crude rubber. The present disclosure uses polydivinylbenzene microspheres loaded with polydopamine-modified white carbon black as the filler, solving the problem that the white carbon black is apt to agglomerate and the white carbon black has poor binding force with the rubber. The rubber composite obtained by the present disclosure is suitable for manufacturing green tires.

The present disclosure discloses a rubber filler, a rubber composite including the same, a preparation method therefor, and use thereof. The rubber filler includes polydivinylbenzene microspheres and polydopamine-modified white carbon black loaded on the polydivinylbenzene microspheres; wherein the mass ratio of the polydivinylbenzene microspheres to the polydopamine-modified white carbon black is 1:(0.5-20). The rubber composite includes: a solution polymerized crude rubber and the rubber filler; wherein the rubber filler is added in an amount of 10-60 wt % of the dry basis mass of the solution polymerized crude rubber. The present disclosure uses polydivinylbenzene microspheres loaded with polydopamine-modified white carbon black as the filler, solving the problem that the white carbon black is apt to agglomerate and the white carbon black has poor binding force with the rubber. The rubber composite obtained by the present disclosure is suitable for manufacturing green tires.

Recovered carbon black from recycled tires may be processed through several stages of: cleaning of the recovered carbon black; activation of the recovered carbon black; hydrothermal impregnation of catalyst in activated carbon of the recovered carbon black; graphitization of activated carbon of the recovered carbon black impregnated with catalyst; and finally, cleaning of graphite and recovery of catalyst.