Process for reducing hexavalent chromium in oxidic solids, which comprises the steps: a) mixing of the oxidic solid containing Cr(VI) with a carbon-containing compound which is liquid in the range from 20 to 100° C., b) treatment of the mixture obtained after a) in an indirectly heated reactor at a temperature of from 700° C. to 1100° C., particularly preferably at a temperature of from 800° C. to 1000° C., under a protective atmosphere, c) cooling of the reaction product obtained after b) to at least 300° C., preferably at least 150° C., under a protective atmosphere.

Process for reducing hexavalent chromium in oxidic solids, which comprises the steps: a) mixing of the oxidic solid containing Cr(VI) with a carbon-containing compound which is liquid in the range from 20 to 100° C., b) treatment of the mixture obtained after a) in an indirectly heated reactor at a temperature of from 700° C. to 1100° C., particularly preferably at a temperature of from 800° C. to 1000° C., under a protective atmosphere, c) cooling of the reaction product obtained after b) to at least 300° C., preferably at least 150° C., under a protective atmosphere.

Particles with suitable properties may be generated using systems and methods provided herein. The particles may include carbon particles.

A sorbent composition for pelletized carbon products having high strength and water resistance is disclosed. Also disclosed are methods of producing and using sorbent compositions of pelletized carbon products having higher strength and water resistance. Other embodiments include a system and method for removing contaminants from a process gas stream.

A carbon black pellet comprising a plurality of agglomerates, aggregates, or primary carbon black particles and a binder including a functional polymer.

A carbon black pellet comprising a plurality of agglomerates, aggregates, or primary carbon black particles and a binder including a functional polymer.

A carbon black wherein a nitrogen adsorption specific surface area (N.sub.2SA) is 25 to 60 m.sup.2/g, a DBP absorption number is 90 to 180 cm.sup.3/100 g, a ratio of the nitrogen adsorption specific surface area (N.sub.2SA) to an iodine adsorption number (IA) (N.sub.2SA/IA) is 1.10×10.sup.3 to 1.50×10.sup.3 m.sup.2/g, a hydrogen content by NMR is 150 to 250 /g, and ΔD is 260 to 290 cm.sup.−1.

A carbon black wherein a nitrogen adsorption specific surface area (N.sub.2SA) is 25 to 60 m.sup.2/g, a DBP absorption number is 90 to 180 cm.sup.3/100 g, a ratio of the nitrogen adsorption specific surface area (N.sub.2SA) to an iodine adsorption number (IA) (N.sub.2SA/IA) is 1.10×10.sup.3 to 1.50×10.sup.3 m.sup.2/g, a hydrogen content by NMR is 150 to 250 /g, and ΔD is 260 to 290 cm.sup.−1.

The present invention includes a system and a method for the refinement of char and the manufacture of regenerated carbon black through waste tire pyrolysis, wherein, in a process of refining char obtained through a pyrolysis process of a waste tires, volatile constituents of char are preferentially removed prior to molding using a pyrolysis furnace having a continuous-type configuration and capable of operating in a continuous manner, and microparticular or microparticle-type regenerated carbon black is produced using the resulting char of increased purity as a material and then molded into spheres with water serving as a binder, whereby regenerated carbon black of high quality can be produced, with the concomitant achievement of cost reduction and an increase in output in the process of producing corresponding spherical regenerated carbon black.

The present invention includes a system and a method for the refinement of char and the manufacture of regenerated carbon black through waste tire pyrolysis, wherein, in a process of refining char obtained through a pyrolysis process of a waste tires, volatile constituents of char are preferentially removed prior to molding using a pyrolysis furnace having a continuous-type configuration and capable of operating in a continuous manner, and microparticular or microparticle-type regenerated carbon black is produced using the resulting char of increased purity as a material and then molded into spheres with water serving as a binder, whereby regenerated carbon black of high quality can be produced, with the concomitant achievement of cost reduction and an increase in output in the process of producing corresponding spherical regenerated carbon black.