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.
Claims29
A method for recycling a scrap rubber, in particular tyres, which method comprises the following steps:
- i) pyrolyzing a scrap rubber to obtain a char material;
- ii) milling the char material obtained in step i) to obtain a carbon black powder;
- characterized in that the pyrolysis in step i) comprises at least a two-stage pyrolysis process, wherein the said two-stage pyrolysis process comprises:
- a) a first pyrolysis stage to obtain an intermediate char material and
- b) a second pyrolysis stage to obtain a char material and wherein at least one of the stages a) or b) is carried out in a rotary kiln.
(canceled)
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, and
- c) 0-30 wt. % of silica.
(canceled)
(canceled)
A scrap rubber derived carbon black pellet comprising:
- a) 60-98 wt. % of carbon black,
- b)<2.5 wt. % of volatiles,
- c) 0-30 wt. % of silica and
- d) 0.5-1.0 wt. % bonding agent
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.