Process for preparing an alkali metal-promoted silver catalyst

Details Process for preparing an alkali metal-promoted silver catalyst Process for preparing an alkali metal-promoted silver catalyst

1982-03-24

1988-07-26

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Silicon containing or process of making

502348, 549534, B01J 2104, B01J 2108, B01J 2304, B01J 2350

Patent

active

047600420

ABSTRACT:
A supported silver catalyst for the oxidation of ethylene with molecular oxygen to ethylene oxide is made by depositing silver on a support capable of selectively adsorbing alkali metals, activating the silver under conditions chosen to provide the optimum selectivity to ethylene oxide and thereafter depositing an amount of an alkali metal sufficient to increase selectivity of the silver catalyst above its alkali-free state. The catalyst most preferably employs a ceramic support having a surface area of 0.3-0.8 m.sup.2 /gm. The amount of alkali metal on the finished catalyst is most preferably 50-300 ppm by weight. The catalyst may also include additional promoters, such as the alkaline earth metals, preferably barium.

REFERENCES:
patent: 2238474 (1938-07-01), McNamee et al.
patent: 2671764 (1951-10-01), Sacken
patent: 3962136 (1976-06-01), Nielsen et al.
patent: 4010115 (1977-03-01), Nielsen et al.
patent: 4012425 (1977-03-01), Nielsen et al.
patent: 4033903 (1977-07-01), Maxwell
patent: 4066575 (1978-01-01), Winnick
patent: 4123385 (1978-10-01), Rebsdat et al.
patent: 4168247 (1979-09-01), Hayden et al.
patent: 4177169 (1979-12-01), Rebsdat et al.
patent: 4186106 (1980-01-01), Rebsdat et al.
patent: 4207210 (1980-06-01), Kilty
patent: 4212772 (1980-07-01), Mross et al.
patent: 4226782 (1980-10-01), Hayden et al.
patent: 4248740 (1981-02-01), Mitsuhara et al.
patent: 4278562 (1981-07-01), Mross et al.
patent: 4350616 (1982-09-01), Boussert
patent: 4368144 (1983-01-01), Mitsuhata et al.

Affiliated with

Also associated with

Rating

Process for preparing an alkali metal-promoted silver catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing an alkali metal-promoted silver catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing an alkali metal-promoted silver catalyst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-257925