Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Free carbon containing
Patent
1996-12-24
1999-10-26
Bos, Steven
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Free carbon containing
423219, 423230, 4232391, 4232451, 502430, 502439, B01J 2002
Patent
active
059728345
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to the field of separation refining of industrial gas. In this type of field, for example, the manufacture of nitrogen gas by separating the oxygen and nitrogen of air; the manufacture of hydrogen gas by removing carbon dioxide, and the like from the decomposition gas of methanol; the manufacture of hydrogen gas by removing methane, and the like from coke oven gas; the manufacture of carbon dioxide by concentrating the carbon dioxide from the exhaust gas of combustion; and the like take place. This invention relates to a manufacturing method for a carbon adsorbent which comprises a molecular sieving carbon or an activated carbon which can be employed in gas separation such as those mentioned above; a pressure swing adsorption method for using these carbon adsorbents; and a separation device.
BACKGROUND OF THE INVENTION
Molecular sieving carbon and activated carbon are manufactured from carbon compounds obtained by the carbonization of carbon compounds such as coke, coal, wood charcoal, and coconut shell char; and all types of resin such as phenol resin, furan resin, and vinylidene chloride copolymer. In the present invention material obtained by the carbonization of carbon compounds is called carbonized charcoal.
Molecular sieving carbons (abbreviated as MSC, and also called carbon molecular sieves, abbreviated as CMS) are known as adsorbents for separating air into nitrogen and oxygen.
Molecular sieving carbons are adsorption-rate-dependent-separation adsorbents which use the fact that oxygen which has a small molecular diameter has a faster rate of adsorption than nitrogen.
Molecular sieving carbons are obtained by means of adjusting the size of the diameter of the pores in carbonaceous material (for example, activated carbon) by means of various methods.
Examples of the manufacturing methods for molecular sieving carbons which have been proposed up till now are described in Japanese Patent Application, Second Publication, No. Sho 52-18675; Japanese Patent Application, First Publication, No. Sho 59-64514; Japanese Patent Application, Second Publication, No. Sho 61-8004; Japanese Patent Application, First Publication, No. Sho 62-176908; Japanese Patent Application, First Publication, No. Sho 60-171212; the specification of U.S. Pat. No. 5,098,880; Japanese Patent Application, First Publication, No. Sho 62-176908; Japanese Patent Application, First Publication, No. Sho 62-132543; Japanese Patent Application, First Publication, No. Sho 62-108722; Japanese Patent Application, Second Publication, No. Sho 49-18555; Japanese Patent Application, Second Publication, No. Sho 61-8004; Japanese Patent Application, First Publication, No. Hei 4-310209, and so on.
Japanese Patent Application, Second Publication, No. Sho 52-18675 discloses a method in which hydrocarbons which discharge carbon by means of thermal decomposition are added to coke which contains a volatile component of up to 5%, and treated at 600.about.900.degree. C. Japanese Patent Application, First Publication, No. Sho 60-171212 discloses a method in which the size of the pore diameter of activated carbon is adjusted by means of impregnating a commercially available carbon adsorbent with a thermally decomposable hydrocarbon. The specification of U.S. Pat. No. 5,098,880 discloses a method for adjusting the size of the pore diameter, wherein activated carbon in which two types of volatile hydrocarbon which have been divided into two portions are brought into contact with commercially available activated carbon starting material while heating.
As a conventional pressure swing adsorption method for separating air using a molecular sieving carbon, the specification of U.S. Pat. No. 2,944,627; Japanese Patent Application, Second Publication, No. Sho 53-44160; Japanese Patent Application, Second Publication, No. Sho 54-8200; and Japanese Patent Application, First Publication, No. Sho 59-182215 are known.
As methods for separating methane, carbon dioxide, and the like from a gas mixture, there are solutio
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Hayashida Masayoshi
Inui Takashi
Miyake Hiroyuki
Nakamura Fusao
Ohsaki Takushi
Bos Steven
Hendrickson Stuart L.
Nippon Sanso Corporation
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