摘要:
Steam stable aluminosilicate zeolite catalysts are prepared by calcining said zeolites at an elevated temperature below about 1100.degree. F. in a closed system having a limited amount of oxygen wherein said zeolite contains organic cations and/or is in intimate contact with a charring agent thereby converting a portion of said organic cations or charring agent to a carbonaceous deposit within the pores of said zeolite in an amount from about 1.5-15 wt. % based on the total weight of the catalyst. Such catalysts are highly useful in the conversion of oxygenates, e.g., methanol to hydrocarbon products.
摘要:
A metallic reforming catalyst, preferably consisting of platinum and iridium or compounds thereof, with or without a third metal component of either Groups IB, IIB, IIIA, IVA, VB, VIB or VIIB on a porous carrier provides excellent conversion of naphtha to C.sub.5 .sup.+ product. A method of incorporating the metals or metal compounds on the carrier and preparing the finished catalyst using dimethyl sulfoxide is a novel procedure and provides unexpected catalytic properties. Novel reforming operations using these catalysts under moderate or severe conditions do not drastically alter the product yield.
摘要:
Crystalline zeolite catalysts are stabilized against reducing and moisture containing atmospheres by providing and maintaining substantial metal cationic sites in the zeolite during use in chemical reactions encountering reducing and/or moisture rich atmospheres at high temperature.
摘要:
A catalytic process is provided for converting a feed containing a C.sub.1 -C.sub.4 monohydric alcohol by contact of said alcohol, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least about 1 micron, a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12. The zeolite contains a Group 2B and a Group 8 metal or metal compound plus magnesium, either per se or in compound form.
摘要:
A catalytic process is provided for converting a feed containing a C.sub.1 -C.sub.4 monohydric alcohol by contact of said alcohol, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least about 1 micron, a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12. The zeolite contains a Group 2B and a Group 8 metal or metal compound plus magnesium, either per se or in compound form.
摘要:
A metallic reforming catalyst, consisting of platinum and iridium or platinum, iridium and copper on a porous carrier provides excellent conversion of naphtha to C.sub.5.sup.+ product. A method of incorporating the metals or metal compounds on the carrier and preparing the finished catalyst using dimethyl sulfoxide is a novel procedure and provides unexpected catalytic properties. Novel reforming operations using these catalysts under moderate or severe conditions do not drastically alter the product yield.
摘要:
Monoalkyl benzene having a side chain of at least two carbon atoms is converted to dialkyl benzene having side chains of shorter length than the charge and containing a proportion of para dialkyl benzene in excess of the thermodynamic equilibrium value by reaction over a dual function catalyst comprising a noble metal from Group VIII of the Periodic Table and a crystalline aluminosilicate zeolite of high silica/alumina ratio above 12, a constraint index of 1 to 12, which aluminosilicate is in a state to restrict diffusion of ortho xylene.
摘要:
A collapsed composition is described which is substantially composed of microcrystallites collectively of the formula: M.sub.2m.sup.2+ Al.sub.2-p M.sub.p.sup.3+ T.sub.r O.sub.7+r.multidot.s where M.sup.2+ is a divalent metal, M.sup.3+ is a trivalent metal, and T is vanadium, tungsten, or molybdenum. The microcrystallites are so small as to be undetectable through conventional x-ray diffraction techniques, yet high resolution electron microscopy reveals that a substantial portion of the microcrystallites are composed of a solid solution having aluminum oxide molecularly dispersed in a divalent metal monoxide crystal structure. Another portion of the microcrystallites are constituted by a spinel phase. The collapsed composition is suitable as a sulfur oxide absorbent, having comparatively high capacity and comparatively fast absorption and desorption rates, and is also suitable as a nitrogen oxide reduction catalyst. The collapsed composition may be produced by heat treating a layered mixed hydroxide clay having innerlayer anions in monometalate form. A sulfur oxide separation process is presented. A nitrogen oxide reduction process is also presented.
摘要:
An improved cracking catalyst is disclosed for the production of propylene from a hydrocarbon feedstock. The process uses a catalyst blend comprising a large pore catalyst and a medium or small pore catalyst, where the medium or small pore catalyst includes a metal deposited on the medium or small pore catalyst.
摘要:
The present invention features the use of a particulate sorbent and a particulate FCC catalyst, which are physically separable, sequentially in the same FCC riser, followed by separation of commingled spent catalyst and sorbent particles from vapors, and the subsequent primary partial regeneration and heat up of spent sorbent particles and catalysts particles in an oxygen deficient burning zone, followed by physical separation of partially regenerated catalyst and sorbent particles, preferably using a cyclonic classifier to effect the separation. This is followed by secondary regeneration of the resulting segregated partially regenerated sorbent and catalyst streams in oxygen rich combustion zones to fully regenerate sorbent and catalyst particles.