Preparation of meso-y-zeolite with large mesopores
AssigneesThe Regents of the University of California, Chevron U.S.A. Inc.
InventorsAlexander KATZ, Xuemin LI, Bi-Zeng ZHAN, Cong-Yan CHEN, Jinyi HAN
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Abstract
Provided is a large mesopore Y zeolite comprising mesopores of at least 18 nm in diameter and a micropore volume of at least 0.16 cm3/g. A process of preparing the large mesopore Y zeolite is also provided. The process allows the synthesis of a zeolite material with large mesopores while also avoiding the common trade of a substantial loss of crystallinity.
Claims20
A process for preparing a large mesopore Y zeolite comprising:
- a) providing a parent Y zeolite and heating the Y zeolite in a basic solution with a zinc salt;
- b) collecting solids from a) and washing and drying the solids;
- c) calcining the washed solids from b);
- d) subjecting calcined solids from c) to a hydrothermal treatment, and
- e) calcining hydrothermal treated material from d).
A process for preparing a large mesopore Y zeolite comprising:
- a) providing a parent Y zeolite and heating the Y zeolite in a basic solution with a zinc salt and a CTA surfactant;
- b) collecting solids from a) and washing and drying the solids;
- c) calcining the washed solids from b);
- d) subjecting calcined solids from c) to a hydrothermal treatment run at a temperature of about 135° C., and
- e) calcining hydrothermal treated material from d).
A large mesopore Y zeolite comprising mesopores of at least 18 nm in diameter and a micropore volume of at least 0.16 cm3/g.
Dependencies are inferred from the claim text.