Crystalline oxide material
AssigneeMobil Oil Corporation
InventorsCharles T. Kresge, Wieslaw J. Roth, Kenneth G. Simmons, James C. Vartuli
Life of this patent
Estimating the term…
Abstract
There is provided a crystalline oxide material with a characteristic X-ray diffraction pattern. This material may be a layered material, which is swollen or pillared. Upon calcination of the swollen material, the layers collapse and condense upon one another in a somewhat disordered fashion to form a non-swellable material. However, the swollen layered material may be intercalated with polymeric oxide pillars to maintain layer separation, even after calcination.
Claims28
An oxide material having the X-ray diffraction pattern comprising the following lines:
- ______________________________________ d(A) I/I.sub.o ______________________________________ >32.2 vs 12.13 - 12.66 w-s 3.35 - 3.51 w-s. ______________________________________
A method for using an as-synthesized crystalline oxide material to prepare a precursor to a pillared oxide material, said method comprising contacting said as-synthesized material with an organic swelling agent under conditions sufficient to swell said as-synthesized material, thereby forming said precursor, wherein said as-synthesized material has the X-ray diffraction pattern comprising the following lines:
- ______________________________________ d(A) I/I.sub.o ______________________________________ 13.53 .+-. 0.2 m-vs 12.38 .+-. 0.2 m-vs 11.13 .+-. 0.2 w-s 9.15 .+-. 0.15 w-s 6.89 .+-. 0.15 w-m 4.47 .+-. 0.10 w-m 3.95 .+-. 0.08 w-vs 3.56 .+-. 0.06 w-m 3.43 .+-. 0.06 m-vs 3.36 .+-. 0.05 w-s ______________________________________
- and wherein said precursor has the X-ray diffraction pattern comprising the following lines:
- ______________________________________ d(A) I/I.sub.o ______________________________________ >32.2 vs 12.41 .+-. 0.25 w-s 3.44 .+-. 0.07 w-s. ______________________________________
A method for preparing a pillared layered material, said method comprising the steps of:
- (i) preparing a reaction mixture capable of forming a layered material upon crystallization, said reaction mixture containing sufficient amounts of alkali or alkaline earth metal cations, a source of silica containing at least about 30 wt% solid silica, an oxide of aluminum, water and hexamethyleneimine;
- (ii) maintaining said reaction mixture under sufficient crystallization conditions until crystals of layered material are formed;
- (iii) swelling said layered material of step (ii) by contacting said layered material with a swelling agent;
- and
- (iv) contacting the swollen material of step (iii) with a suitable pillaring agent.
Dependencies are inferred from the claim text.