Patent · US Expired

Process for the production of carbon molecular sieves

US4420415A · kind A · utility

14Cited by

5References

5Claims

0Family size

Assignee

Director-General of Agency of Industrial Science and Technology · JP

Inventors

Nakaji Yuki
Hiroshi Kitagawa · Nagoya, JP

Key dates

Filing date	Aug 21, 1981
Grant date	Dec 13, 1983
Priority date	—
Expiry date	Aug 21, 2001

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J20/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Carbon molecular sieves having excellent oxygen adsorption properties may be obtained from a vinylidene chloride copolymer. The copolymer is carbonized for the removal of its chlorine components and the resulting char is pulverized. Specific amounts of a carbonaceous sintering agent such as coal tar pitch and an organic binder such as microcrystalline cellulose are then added to the pulverized product and the mixture is shaped into pellets. By thermally treating the pellets under specific conditions in a specific manner, carbon molecular sieves having pore diameters suitable for the adsorption of oxygen may be obtained. The molecular sieves are suitable for concentrating nitrogen in air.

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