Process for preparing a nanosized zeolitic material
AssigneeBASF SE
InventorsUlrich Mueller, Lian Ma, Xiao Feng-Shou, Xiaoyu Yang
Life of this patent
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Abstract
A process for preparing a zeolitic material, comprising (i) preparing a mixture comprising the at least one silicon containing precursor compound from which the zeolitic framework is formed, at least one pore forming agent, and at least one polymer which has an essentially spheroidal geometry in the mixture; (ii) crystallizing the zeolitic material from the mixture obtained in (i) to obtain the crystallized zeolitic material in its mother liquor.
Claims17
A process for preparing a zeolitic material, comprising
- (i) preparing a mixture comprising the at least one silicon containing precursor compound from which the zeolitic framework is formed, at least one pore forming agent, and at least one polymer which has an essentially spheroidal geometry in the mixture;
- (ii) crystallizing the zeolitic material from the mixture obtained in (i) to obtain the crystallized zeolitic material in its mother liquor;
- (iii) separating the crystals obtained from (ii) from the mother liquor;
- (iv) drying the separated crystals;
- (v) calcining the dried crystals,
- wherein at least 80% of the crystals have a size in the range of from (x−Δx) nm to (x+Δx) nm, wherein Δx is in the range of from 0 to 25, and wherein, for a given zeolitic material, x has a value in the range of from 50 to 500, the size of the crystals determined via TEM.
7-8. (canceled)
A method for controlling the size of the crystals of a zeolitic material in a process for preparing said zeolitic material, said process comprising
- (i) preparing a mixture comprising the at least one silicon containing precursor compound from which the zeolitic framework is formed, at least one pore forming agent, and at least one polymer which has an essentially spheroidal geometry in the mixture;
- (ii) crystallizing the zeolitic material from the mixture obtained in (i) to obtain the crystallized zeolitic material in its mother liquor,
- wherein at least 80% of the crystals have a size in the range of from (x−Δx) nm to (x+Δx) nm, wherein Δx is in the range of from 0 to 25, and wherein, for a given zeolitic material, x has a value in the range of from 50 to 500, the size of the crystals determined via TEM,
- said method for controlling the size of the crystals being characterized in that the higher the value of x to be obtained, the lower the concentration of the polymer in the mixture according to (i) has to be chosen.
(canceled)
Dependencies are inferred from the claim text.