Maintaining molecular sieve catalytic activity under water...

Details Maintaining molecular sieve catalytic activity under water... Maintaining molecular sieve catalytic activity under water...

2007-12-18

2007-12-18

Wood, Elizabeth D. (Department: 1755)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

C585S324000, C585S326000, C585S327000, C585S640000, C585S906000, C585S951000

Reexamination Certificate

active

11285699

ABSTRACT:
The invention is directed to methods for protecting metalloaluminophosphate molecular sieves, particularly silicoaluminophosphate (SAPO) molecular sieves, from loss of catalytic activity due to contact with a gas containing water. The methods of the invention provide procedures that enable activated sieve to contact water vapor, within a certain range of time, temperature, and water partial pressure conditions, before the sieve becomes substantially deactivated.

REFERENCES:
patent: 4764269 (1988-08-01), Edwards et al.
patent: 5185310 (1993-02-01), Degnan et al.
patent: 5248647 (1993-09-01), Barger
patent: 5663471 (1997-09-01), Kvisle et al.
patent: 6225254 (2001-05-01), Janssen et al.
patent: 6245703 (2001-06-01), Kuechler et al.
patent: 6316683 (2001-11-01), Janssen et al.
patent: 6441261 (2002-08-01), Kuechler et al.
patent: 6503863 (2003-01-01), Fung et al.
patent: 359 841 (1993-08-01), None
M. Briend et al., “Influence of the Choice of the Template on the Short- and Long-Term Stability of SAPO Zeolite,”J. Phys. Chem., vol. 99, pp. 8270-8276, 1995.
M.-H. Simonot-Grange et al., “Contribution to the study of framework modification of SAPO-34 and SAPO-37 upon water adsorption by thermogravimetry,”Thermochimica Acta, vol. 329, pp. 77-82, 1999.
F.D.P. Mees et al., “Improvement of the hydrothermal stability of SAPO-34,”Chem. Commun., vol. 1, pp. 44-45, 2003.

Affiliated with

Also associated with

Rating

Maintaining molecular sieve catalytic activity under water... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Maintaining molecular sieve catalytic activity under water..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Maintaining molecular sieve catalytic activity under water... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3897090