Abstract Granular molecular sieve may be obtained, without necessitating any activating treatment, by subjecting a vinylidene chloride copolymer to a thermal carbonization treatment for removal of hydrochloric acid, pulverizing the resultant product to a grain size smaller than 100 mesh size, adding 15 to 35 parts by weight of a carbonaceous sintering agent and 8 to 15 parts by weight of an organic pelletizer capable of gas generation by heating to 100 parts by weight of the pulverized product, pelletizing the resultant mixture and carbonizing the resultant pellets at a temperature of 400 to 900 DEG C for a period of 2 to 6 hours. The pore diameter of this molecular sieve can be suitably controlled within a range of from 5 to 10 A by appropriately selecting the sintering agent and pelletizer employed and the conditions of the thermal treatment.
Inventors
👤 Nakaji Yuki
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-28 09:45
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/306
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A method of manufacturing carbonaceous granular molecular sieves having a pore diameter in the range of about 3-10 A comprising the steps of subjecting a vinylidene chloride copolymer to a thermal carbonization treatment for removal of hydrogen chloride gas, cooling and pulverizing the resultant product to a grain size smaller than 100 mesh, admixing per 100 parts of said pulverized product 15 to 35 parts of a carbonaceous sintering agent and 8 to 15 parts of an organic pelletizing binder generating gas upon heating, pelletizing the resultant mixture and carbonizing the resultant pellets without activation at a temperature ranging from 400° C. to 900° C. for a period ranging from 2 to 6 hours, all parts being by weight.
Claim 2
Independent Claim
119 words
A method of manufacturing carbonaceous granular molecular sieves having a pore diameter in the range of about 3-10 A comprising the steps of subjecting a vinylidene chloride copolymer to a thermal carbonization treatment for removal of hydrogen chloride gas, cooling and pulverizing the resultant product to a grain size smaller than 100 mesh, admixing per 100 parts of said pulverized product 15 to 35 parts of a carbonaceous sintering agent and 8 to 15 parts of an organic pelletizing binder generating gas upon heating, pelletizing the resultant mixture and carbonizing the resultant pellets without activation at a temperature ranging from 400° C. to 900° C. for a period ranging from 2 to 6 hours, all parts being by weight.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein said vinylidene chloride copolymer is vinylidene chloride-vinyl chloride copolymer.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein said carbonaceous sintering agent is coal tar pitch or coking coal.
Claim 5
Dependent Claim
16 words
A method according to claim 1, wherein said pelletizer is crystalline cellulose or sulfite waste liqour.
Claim 6
Dependent Claim
10 words
A product obtainable by the method according to claim 1.