IMPROVEMENTS IN OR RELATING TO PROCESSES FOR PRODUCTION OF LOW PERMEABILITY CARBON

Patent · Wed Jul 26 04:00:00 EDT 1961

OSTI ID:4020995

Rivington, H L

A process is outlined for producing low-permeability carbon from carbon of substantially higher permeability. In this process, the carbon is impregnated with furfural either alone or in admixture, the furfural is polymerized under pressure and heat without a catalyst, and the impregnated carbon is heated to carbonize the impregnant. A calcining step at approximately 1000 deg C may also be included, and the whole process may be repeated to lower the permeability still further. In examples of the process, permeabilities of approximately 10/ sup -3/ darcys were lowered to approximately 10/sup -5/ to 10/sup -6/ darcys in a single application, and five successive applications resulted in a permeability reduction of 10/sup 6/. (D.L.C.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-025148
• OSTI ID: 4020995
• Report Number(s): GB 873607
• Country of Publication: United Kingdom
• Language: English

Related Subjects

ALDEHYDES
CARBON
FURANS
FURFURAL
HETEROCYCLICS
HIGH TEMPERATURE
IMPREGNATION
METALS, CERAMICS, AND OTHER MATERIALS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
POLYMERIZATION
POROSITY
PRESSURE
PRODUCTION