CAS: 12297-72-2; Cesium Triiodide

专利信息

专利号:US-5241114-A
优先权日:1982-08-30
标题:Method and system for extending catalyst useful life
发明人：SMITH THOMAS G; BAILEY OWEN H; HAGEN GARY P
权利人:AMOCO CORP
摘要:A method and a system for extending useful life of a basic catalyst are disclosed. The basic catalyst comprises a particulate, porous, siliceous catalyst support and an alkali metal in the +1 oxidation state on the catalyst support surface. The catalyst is suitable for the synthesis of an alpha, beta-ethylenically unsaturated carboxylic acid by condensation of a saturated carboxylic acid with formaldehyde. The method of the present invention contemplates providing a reactor, or a series of reactors, containing the basic catalyst and a confined source of the alkali metal associated with a suitable carrier, upstream of the reactor or reactors. A feed stream to the reactor is passed first through the confined source and thereafter through the reactor while reaction conditions for the condensation reaction are maintained within the reactor. The temperature of the feed stream passing through the confined source can be modulated to control release of the alkali metal from the carrier. Alkali metal released from the carrier is entrained into the feed stream passing through the confined source and is deposited onto the support in the reactor as the feed stream is passed through the reactor. Feed stream flow through the reactor or reactors can be reversed and/or interchanged as long as the confined alkali metal source remains upstream of one or more of the reactors, i.e., the upstream-most of the reactors in a series of staged reactors can function as the confined alkali metal source as well.

专利号:US-5104845-A
优先权日:1988-09-22
标 题:Group 1 metalloaluminum borates
发明人：MONTAG RUTH A; SATEK LARRY C
权利人:AMOCO CORP
摘要:The preparation, structure, and properties of solid inorganic materials containing aluminum, boron, oxygen and at least one metallo element selected from Group IA of the Periodic Table is described. Also described is the use of such materials in catalytic compositions for the conversion of organic compounds. In particular, the new materials having the general formula: (x) M2O.(y) Al2O3.(z) B2O3 where M is at least one metallo element selected from Group IA of the Periodic Table having atomic number from 11 through 55, inclusive, and x, y and z are numbers representing molar amounts of the oxides are described as well as the use of such materials in various catalyzed processes including synthesis of methacrylic acid.