JP-2025533177-A5 -

Dates

Publication Date

20260511

Application Date

20231013

Description

In another embodiment, an aluminosilicate molecular sieve is provided that has an SSY skeleton and, in the finished state, has an N-ethyl-N-(3,3,5-trimethylcyclohexyl)pyrrolidinium cation and/or an N-ethyl-N-(2,4,4-trimethylcyclopentyl)pyrrolidinium cation in its pore structure. The following is further disclosed regarding the present invention. [1] A method for synthesizing aluminosilicate molecular sieves having an SSY skeleton, (1) (a) A source of aluminum and silicon, wherein both the aluminum and silicon sources are aluminosilicate zeolites having a FAU skeleton, and (b) A structure-directing agent [Q] comprising an N-ethyl-N-(3,3,5-trimethylcyclohexyl)pyrrolidinium cation and/or an N-ethyl-N-(2,4,4-trimethylcyclopentyl)pyrrolidinium cation, (c) Sources of alkali metals [M] and (d) Sources of hydroxide ions, (e) Seed crystal and, (f) Prepare a reaction mixture containing water, (2) The method comprising providing the reaction mixture to conditions sufficient for crystallization to form crystals of the aluminosilicate molecular sieve. [2] The method according to [1], wherein the reaction mixture has the following composition in terms of molar ratio. [3] The method according to [1], wherein the reaction mixture has the following composition in terms of molar ratio. [4] The method according to [1], wherein the aluminosilicate zeolite having the FAU skeleton is zeolite Y. [5] The method according to [1], wherein the alkali metal comprises sodium, potassium, or a mixture of sodium and potassium. [6] The method according to [1], wherein the seed crystal comprises a crystalline molecular sieve having an SSY skeleton. [7] The method according to [1], wherein in the reaction mixture, the weight ratio of the seed crystal to the silica in the aluminosilicate zeolite having the FAU skeleton is in the range of 0.001:1 to 0.2:1. [8] The crystallization conditions include heating the reaction mixture at a temperature of 100°C to 200°C under self-generated pressure, according to the method of [1]. [9] Aluminosilicate molecular sieves having an SSY skeleton and, in their completed state, having an N-ethyl-N-(3,3,5-trimethylcyclohexyl)pyrrolidinium cation and/or an N-ethyl-N-(2,4,4-trimethylcyclopentyl)pyrrolidinium cation within their pore structure. [10] The aluminosilicate molecular sieve described in [9] is an aluminosilicate molecular sieve having a molar ratio of SiO₂/Al₂O₃ in the range of 20 to 200. [11] The aluminosilicate molecular sieve described in [9] is an aluminosilicate molecular sieve having a molar ratio of SiO₂/Al₂O₃ in the range of 30 to 100. [12] The aluminosilicate molecular sieve described in [9] has a phase purity of at least 95% by weight.