Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1986-07-31
1989-07-04
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502237, B01J 2108, B01J 2302
Patent
active
048450707
ABSTRACT:
A particulate catalyst, especially suitable for condensation of an alpha, beta-ethylenically unsaturated monocarboxylic acid with formaldehyde, is disclosed. The catalyst comprises a catalyst support constituted by porous silica gel, and cesium ions in the +1 oxidation state on the catalyst support surface. The catalyst support has a surface area of about 50 to about 150 m.sup.2 /gram, a porosity of less than about 1 cm.sup.3 /gram, and a pore-size distribution such that less than about 10 percent of the pores present in the catalyst have a pore diameter greater than about 750 Angstroms. The cesium ions are present in an amount of about 4 to about 10 percent by weight, based on the weight of the catalyst. Also disclosed are methods of making the catalyst. One method contemplates combining, with agitation, a silica sol and a cesium compound able to provide cesium in the +1 oxidation state on the catalyst support surface. The silica sol has a silica particle diameter of about 50 to about 200 Angstroms. The silica sol and the cesium compound are combined in relative amounts sufficient to produce a freely-flowing slurry having a Cs/(SiO.sub.2 +Cs) weight ratio of about 0.04 to about 0.1. The freely-flowing slurry is solidified to a gel which is then dried to a crushable solid state. The dried gel is calcined for a time period sufficient to remove primarily adsorbed moisture therefrom.
REFERENCES:
patent: 3089901 (1963-05-01), Vitcha et al.
patent: 3100795 (1963-08-01), Frantz et al.
patent: 3325554 (1967-06-01), Addy
patent: 3840587 (1974-10-01), Pearson
patent: 3933888 (1976-01-01), Schlaefer
Amoco Corporation
Dees Carl F.
Magidson William H.
Medhurst Ralph C.
LandOfFree
Catalyst for producing alpha, beta-ethylenically unsaturated ali does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalyst for producing alpha, beta-ethylenically unsaturated ali, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst for producing alpha, beta-ethylenically unsaturated ali will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-852413