Heat-resistant low-silica zeolite, and process for production an

Chemistry of inorganic compounds – Zeolite – Aging to induce zeolite formation from inorganic mixture

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

423711, 423DIG21, 502 79, 95 96, 95130, C01B 3922, B01L 2018, B01J 53047

Patent

active

060369396

ABSTRACT:
A novel heat-resistant low-silica zeolite, an industrial production process, and uses of the low-silica zeolite are provided. The heat-resistant low-silica zeolite contains Si and Al in a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 ranging from 1.9 to 2.1, and has sodium and/or potassium as metal cation, wherein the low-silica zeolite contains low-silica faujasite type zeolite at a content of not lower than 88%, and has a thermal decomposition temperature ranging from 870.degree. C. to 900.degree. C. in the air. The process for producing the heat-resistant low-silica zeolite comprises mixing a solution containing an aluminate with another solution containing a silicate, allowing the resulting mixture to gel, and aging the resulting gel, at the temperature of from 0.degree. C. to 60.degree. C., to prepare a slurry having a viscosity ranging from 10 to 10000 cp and containing amorphous aluminosilicate having a specific surface area of not less than 10 m.sup.2 /g with an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio ranging from 1.9 to 2.1; and subsequently crystallizing the aluminosilicate. The low-silica zeolite ion-exchanged with lithium or an alkaline earth metal is useful for gas separation.

REFERENCES:
patent: 3767771 (1973-10-01), Guth et al.
patent: 4481018 (1984-11-01), Coe et al.
patent: 4606899 (1986-08-01), Butter et al.
patent: 4661334 (1987-04-01), Latourrette et al.
patent: 4859217 (1989-08-01), Chao
patent: 5268023 (1993-12-01), Kirner
patent: 5366720 (1994-11-01), Caglione et al.
patent: 5417957 (1995-05-01), Coe et al.
patent: 5464467 (1995-11-01), Fitch et al.
patent: 5868818 (1999-02-01), Ogawa et al.
patent: 5908823 (1999-06-01), Zatta et al.
patent: 5928623 (1999-07-01), Plee et al.
Kuhl, Zeolites, 1987, vol. 7 Sep. pp. 451-457 Crystallization of low-silica faujasite (SiO.sub.2 /Al.sub.2 O.sub.3 .about.2.0).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Heat-resistant low-silica zeolite, and process for production an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat-resistant low-silica zeolite, and process for production an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat-resistant low-silica zeolite, and process for production an will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-166328

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.