Catalyst and process for production of an alpha, beta-ethylenically unsaturated monocarboxylic acid

Patent · Tue Jan 31 04:00:00 EST 1989

OSTI ID:6227873

Montag, R A; McKenna, S T

A method is described for making a cesium-containing catalyst containing a SiO/sub 2/-SnO/sub 2/ mixed-oxide and suitable for vapor-phase condensation of a saturated monocarboxylic acid with formaldehyde to produce an alpha, beta-ethylenically unsaturated monocarboxylic acid, which method comprises the steps of combining, with agitation, a silica sol having a silica particle diameter of about 50 to about 200 Angstroms, a slurry of SnO/sub 2/ and a cesium compound able to provide cesium in the +1 oxidation state on the catalyst support, in relative amounts sufficient to produce a freely-flowing slurry having a SiO/sub 2//SnO/sub 2/ weight ratio of about 0.05 to about 6 and a Cs/(SiO/sub 2/+-SnO/sub 2/+Cs) weight ratio of about 0.01 to about 0.15; solidifying the produced, freely-flowing slurry to a gel; drying the obtained gel to a crushable solid state; and calcining the dried gel for a time period sufficient to remove adsorbed moisture therefrom.

• Assignee: Amoco Corp., Chicago, IL
• Patent Number(s): US 4801571
• OSTI ID: 6227873
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ADSORBENTS
ALDEHYDES
ALKALI METAL COMPOUNDS
CALCINATION
CARBOXYLIC ACIDS
CATALYSTS
CESIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DEHYDRATION
DISPERSIONS
DRYING
FORMALDEHYDE
GELS
MIXTURES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PHASE TRANSFORMATIONS
PYROLYSIS
SILICON COMPOUNDS
SILICON OXIDES
SLURRIES
SOLIDIFICATION
SUSPENSIONS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TIN COMPOUNDS
TIN OXIDES