The invention relates to the chemical industry and can be used for processing methane and other volatile, liquid, solid fusible hydrocarbons when producing hydrogen, soot, and other flammable gases. The invention relates to a method for the pyrolytic decomposition of hydrocarbons, in which a pyrolysis reactor arranged in a space bounded by a lining is heated by flue gases generated by combusting a hydrogen-enriched mixture of air and gaseous hydrocarbons, while ensuring a maximum decrease in CO.sub.2 emissions into the atmosphere. The invention also relates to a unit for the pyrolytic decomposition of hydrocarbons. The technical result is a high degree of separation of hydrogen and carbon by fast high-temperature pyrolysis at atmospheric pressure without oxygen supply and without CO.sub.2 production.

The present invention relates to a process for the processing and/or purification of carbon black comprising the steps of: a) providing carbon black containing impurities b) providing an aqueous fluid comprising a nitrogen hydride c) providing an alkali metal hydroxide and/or an alkali metal d) contacting the mixture of step a), the fluid of step b) and the alkali metal hydroxide and/or alkali metal of step c) e) subjecting the composition obtained in step d) to an elevated temperature in the range of 80 to 240° C. and an elevated pressure in the range of 5 to 50 bar f) separating a carbonaceous solid from the composition obtained in step e). The present invention further relates to the use of a nitrogen hydride as a dispersing agent for producing and/or stabilizing an aqueous suspension.

A method and apparatus for making carbon black. A plasma gas is flowed into a plasma forming region containing at least one, magnetically isolated, plasma torch containing at least one electrode, and forming a plasma. Collecting the plasma formed in a cooled header and flowing the plasma through at least one reaction region to heat the reaction region, and injecting carbon black forming feedstock into the reaction region, resulting in the formation of at least one grade of carbon black. An apparatus for making carbon black is also described including a plasma forming section containing at least one, magnetically isolated plasma torch containing at least one electrode, in fluid flow communication with at least one carbon black forming reactor section, the plasma section and reactor section separated by a plasma formed collection header.

A method for purifying carbon black obtained from pyrolysis of used tires by solvent extraction involves removal of residues of pyrolyzed rubber deposited on the surface of the carbon black obtained from the pyrolysis and the polycyclic aromatic hydrocarbons contained therein. The method also involves extracting zinc from the purified carbon black using carboxylic acids of natural origin.

A torch stinger apparatus may comprise one or more sets of plasma generating electrodes and at least one hydrocarbon injector contained within the electrodes. The electrodes may be concentric. The at least one hydrocarbon injector may be cooled. A method of making carbon particles using the apparatus is also described.

A torch stinger apparatus may comprise one or more sets of plasma generating electrodes and at least one hydrocarbon injector contained within the electrodes. The electrodes may be concentric. The at least one hydrocarbon injector may be cooled. A method of making carbon particles using the apparatus is also described.

A coloring composition is a coloring composition including a black colorant, a polymerizable compound, and a photopolymerization initiator, in which the photopolymerization initiator includes a photopolymerization initiator a in which a light absorption coefficient at 365 nm in methanol is more than 1.0×10.sup.2 mL/gcm and a photopolymerization initiator b in which a light absorption coefficient at 365 nm in methanol is 1.0×10.sup.2 mL/gcm or less and a light absorption coefficient at 254 nm is 1.0×10.sup.3 mL/gcm or more, a content of the photopolymerization initiator b is 45.0 to 200.0 parts by mass with respect to 100.0 parts by mass of a content of the photopolymerization initiator a, and a ratio of a maximum absorbance to a minimum absorbance of a coloring cured film obtained by curing the coloring composition at a wavelength of 400 to 700 nm is 1.0 to 2.5.

A method of cooling a liner in a plasma chamber. A recycle gas is contacted with or passed through the liner to cool the liner and pre-heat the recycle gas. The pre-heated gas is then recycled through the plasma chamber to become part of the plasma forming process. The method further comprises the liner is graphite, the recycle gas passes through at least one cooling channel present in the liner, at least one of the cooling channels are covered with at least one removable liner/channel cover, carbon deposits are formed from the presence of hydrocarbons in the recycle gas, at least one channel is formed in a spiral cooling channel pattern, at least one channel is formed in a substantially straight cooling channel pattern, and a plenum to aid in the production of an even distribution of cooling gas in the channels.

A slurry including at least a carbon black and a dispersion medium, wherein a concentration of the carbon black in the slurry is 5% by mass or more and 25% by mass or less, and wherein in a volume-based frequency distribution of particle size of the carbon black measured by a laser diffraction/scattering method, provided that a volume concentration of carbon black with a particle size of 0.6 μm or more is x (%), a volume concentration of carbon black with a particle size of 0.3 μm or more and less than 0.6 μm is y (%), and a volume concentration of carbon black having a particle size of less than 0.3 μm is 100−(x+y) (%), the slurry satisfies 10≤x≤70, 30≤y≤90, and 0≤100−(x+y)≤30.

The disclosed method and related systems and devices relate to producing a pigment from microbial biomass. The pigment may be an engineered black pigment. The method may include a thermal processing step where the microbial biomass is charred. The biomass in the charred and pre-charred state can be washed chemically and/or mechanically. In another step the biomass is ground via a grinding of milling process. The grinding/milling may occur at any various points in the process. In some embodiments the biomass has a particle size between 0.01 and 100 microns.