Patent · US Expired

Process for the control of the ratio DBP number/DBP number after pressing in the manufacture of carbon black pellets

US4238199A · kind A · utility

8Cited by

6References

3Claims

0Family size

Assignee

Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

Lothar Rothbuhr · Hürth, DE
Werner Sroka · Münstermaifeld, DE
Karl Vogel · Bad Vilbel, DE

Key dates

Filing date	Jul 30, 1979
Grant date	Dec 9, 1980
Priority date	—
Expiry date	Jul 30, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/19
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A process for controlling the ratio: EQU DBP NUMBER/DBP NUMBER AFTER PRESSING for carbon black pellets comprising mixing the carbon black with water and forming the carbon black and water mixture into pellets by means of a wet pelletizing machine, selectively controlling the rotating shaft speed of the pelletizing machine and the amount of water and the location of water injected into the pelletizing machine; and subsequently drying the wet carbon black.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.