Patent · US Expired

Active coke produced from pit coal and production process thereof

US4703032A · kind A · utility

0Cited by

4References

7Claims

0Family size

Assignee

Perfluktiv Technik AG · CH

Inventors

Erich Sundermann · Braunschweig, DE
Hans Reye · Neustadt, DE
Otto Abel · Clausthal-Zellerfeld, DE

Key dates

Filing date	Jan 9, 1986
Grant date	Oct 27, 1987
Priority date	—
Expiry date	Jan 9, 2006

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2220/56
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The granulates of active coke produced from pit coal have an inactive abrasion-proof core based on coal or a ceramic material, as well as an envelope based on active coke particles adhering to the core. Various processes for producing said granulates are disclosed. In one embodiment, a ground coal covering is applied to the core before activation; another embodiment provides for the application of a covering based on coke particles already activated. In a third embodiment, on the inactive core based on swollen and burned material there is first provided an intermediary layer based on a material which volatilizes partly during the carbonizing treatment in order to compensate for the expansion differences of the core and of the envelope.

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