Method for obtaining a carbon black powder by pyrolyzing scrap rubber, the carbon black thus obtained and the use thereof
AssigneeBlack Bear Carbon B.V.
InventorsArnoldus Henricus Adrianus Verberne, Jan Anne Jonkman, Christopher Michael Twigg
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for recycling scrap rubber comprising the steps of pyrolyzing scrap rubber to obtain a char material and milling the thus obtained char material. The present invention also relates to carbon black powders and carbon black pellets obtained by the method according to the invention. Moreover, the present invention relates to the use of said carbon black powder and to compositions comprising said carbon black powders.
Claims7
A scrap rubber derived carbon black powder, wherein the scrap rubber derived carbon black powder comprises:
- a) 60-98 wt. % of carbon black,
- b) less than 2.0 wt. % of volatiles,
- c) 0-30 wt. % of silica, and
- d) zinc sulfide in an amount of 1-5 wt. %, based on the total weight of the carbon black powder,
- wherein the scrap rubber derived carbon black powder has a particle size distribution of D99 less than 4 μm and D50 less than 0.3 μm,
- wherein the scrap rubber derived carbon black powder has a BET surface area of at least 60 m2/g;
- wherein the scrap rubber derived carbon black powder has a STSA (statistical thickness surface area) of between 46-86 m2/g;
- and
- wherein the scrap rubber derived carbon black has a polyaromatic hydrocarbon (PAH) content of less than 0.50 mg/kg.
Dependencies are inferred from the claim text.