CARBON BLACK, METHOD FOR THE PRODUCTION THEREOF, AND USE THEREOF

• US 20110236816A1
• Filed: 10/09/2009
• Published: 09/29/2011
• Est. Priority Date: 10/16/2008
• Status: Active Grant

• Current Assignee: Evonik Carbon Black GmbH (Rag-Stiftung)
• Original Assignee: Evonik Carbon Black GmbH (Rag-Stiftung)
• Inventors: Stanyschöfsky, Michael, Messer, Paul, Meinerzhagen, Gernot, Fröhlich, Joachim
• Granted Patent: US 9,493,659 B2
• Time in Patent Office: Days
• US Class Current: 430/108.9
• CPC Class Codes: C01P 2004/51 Particles with a specific particle size distribution
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/19 Oil-absorption capacity, e.g. DBP values
• CPC Class Codes: C09C 1/44 Carbon
• CPC Class Codes: C09C 1/50 Furnace black ; Preparation thereof separation or recovery C09C1/487
• CPC Class Codes: C09C 1/52 Channel black ; Preparation thereof separation or recovery C09C1/487
• CPC Class Codes: C09C 1/54 Acetylene black; thermal black ; Preparation thereof separation or recovery C09C1/487
• CPC Class Codes: C09D 11/037 characterised by the pigment
• CPC Class Codes: C09D 11/324 containing carbon black

Abstract

The invention relates to carbon black having a C-14 content greater than 0.05 Bq/g and a ratio ΔD50/Dmode of the aggregate size distribution of less than 0.7. The carbon black is produced by thermal oxidative pyrolysis or thermal cleavage of the carbon black raw material in that the carbon black raw material contains renewable carbon black raw materials and an oxygen deficiency is present in the pyrolysis/cleavage reaction. The carbon blacks can be used in rubber and rubber mixtures, plastic, printing inks, inks, inkjet inks, toners, lacquers, paints, paper, adhesives, batteries, pastes, bitumens, concrete, and other building materials and as reducing agents in metallurgy.

Claims

1. Carbon black, wherein the C-14 content is greater than 0.05 Bq/g and the Δ

D50/Dmode ratio of the aggregate size distribution is smaller than 0.7.

2. Carbon black according to claim 1, wherein the C/H ratio is from 0.1 to 2.0.

3. Process for producing the carbon black according to claim 1, through thermal oxidative pyrolysis or thermal cleavage of the carbon black feedstock wherein the carbon black feedstock comprises a renewable carbon black feedstock and the amount of oxygen present during the pyrolysis/cleavage reaction of the carbon black feedstock is substoichiometric.

4. Process according to claim 3, wherein the reaction is terminated through cooling to temperatures below the pyrolysis temperature or cleavage temperature.

5. Process according to claim 3, wherein the reaction is carried out in a furnace-black reactor which, along the reactor axis, has a combustion zone, a reaction zone and a termination zone, by producing a stream of hot exhaust gas in the combustion zone through complete combustion of a fuel in a gas comprising oxygen, and passing the exhaust gas from the combustion zone through the reaction zone into the termination zone, mixing a carbon black feedstock into the hot exhaust gas in the reaction zone, and terminating carbon black formation in the termination zone by spraying water into the system.

6. Use of the carbon black according to claim 1, in rubber and rubber mixtures, in plastic, in printing inks, inkjet inks and other inks, in toners, in lacquers, in paints, in paper, in adhesives, in batteries, in pastes, in bitumen, in concrete and in other construction materials, and as reducing agent in metallurgy.

7. Polymer mixtures, wherein they comprise at least one polymer and at least one carbon black according to claim 1.

8. Rubber mixtures, wherein they comprise at least one rubber and at least one carbon black according to claim 1.

9. Plastics mixtures, wherein they comprise at least one plastic and at least one carbon black according to claim 1.

10. Inks, wherein they comprise at least one carbon black according to claim 1.

11. Printing inks, wherein they comprise at least one carbon black according to claim 1.

12. Use of the rubber mixtures according to claim 7 for producing pneumatic and other tyres, tyre treads, cable sheathing, hoses, drive belts, conveyor belts, roll coverings, shoe soles, sealing rings, profiles and damping.

13. Process according to claim 4, wherein the reaction is carried out in a furnace-black reactor which, along the reactor axis, has a combustion zone, a reaction zone and a termination zone, by producing a stream of hot exhaust gas in the combustion zone through complete combustion of a fuel in a gas comprising oxygen, and passing the exhaust gas from the combustion zone through the reaction zone into the termination zone, mixing a carbon black feedstock into the hot exhaust gas in the reaction zone, and terminating carbon black formation in the termination zone by spraying water into the system.

14. Use of the carbon black according to claim 2 in rubber and rubber mixtures, in plastic, in printing inks, inkjet inks and other inks, in toners, in lacquers, in paints, in paper, in adhesives, in batteries, in pastes, in bitumen, in concrete and in other construction materials, and as reducing agent in metallurgy.