Carbon black, method of producing carbon black, and device for implementing the method

US8236274B2 · kind B2 · utility

Assignee

• Evonik Carbon Black GmbH · DE

Inventors

• Catharina Quitmann
• Alfons Karl · Hanau, DE
• Matthias Katzer · Leingarten, DE
• Kai Krauss · Großkrotzenburg, DE
• Michael Stanyschöfsky · Bad Mergentheim, DE

Key dates

• Filing date: Aug 3, 2007
• Grant date: Aug 7, 2012
• Expiry date: Aug 31, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a carbon black having an aggregate size distribution which has a (d90-d10)/d50 ratio of less than or equal to 1.1. The carbon blacks are produced by admixing hot air if desired to a gas mixture comprising a carrier gas and a carbon black feedstock, passing the gas mixture into a burner pipe, burning the gas mixture at the burner pipe openings, and drawing the flames under suction, together with the ambient air drawn in freely under suction from the outside, through a cooled, narrowing gap, and carrying out cooling, the cooled, narrowing gap having a height (h) to width (b) ratio of 1-100, the width (b) being 0.5 to 10 mm, and the flow rate at the narrowest point of the gap being 10-200 m/s. The carbon blacks of the invention can be used as non-reinforcing filler, reinforcing filler, UV stabilizer, conductive black, pigment or reducing agent.