摘要:
A method for reducing the level of occluded alkali metal cations from an MSE-framework type molecular sieve comprises either (a) contacting the molecular sieve with a solution containing ammonium ions at a temperature of at least about 50° C. to ammonium-exchange at least part of the occluded potassium ions or (b) contacting the molecular sieve with steam at a temperature of at least about 300° C. and then subjecting the steamed molecular sieve to ammonium exchange.
摘要:
A method for reducing the level of occluded alkali metal cations from an MSE-framework type molecular sieve comprises either (a) contacting the molecular sieve with a solution containing ammonium ions at a temperature of at least about 50° C. to ammonium-exchange at least part of the occluded potassium ions or (b) contacting the molecular sieve with steam at a temperature of at least about 300° C. and then subjecting the steamed molecular sieve to ammonium exchange.
摘要:
The present invention relates to a hydrothermally stable form of a porous crystalline material useful in applications where sorbing hydrocarbons is desired. Among such applications is sorption of hydrocarbons from an exhaust stream from an engine in a cold-start condition. A hydrocarbon sorption apparatus including the hydrothermally stable porous crystalline material is provided. In either case, the hydrothermally stable porous crystalline material can contain both 10- and 12-membered ring pore channels, or alternately an 11-membered ring pore channel, as well as have one or more other properties.
摘要:
Catalyst compositions suitable for use in the exhaust gas recycle stream of an internal combustion engine are provided. Such catalyst compositions typically provide significant amounts of methane in addition to syngas. A reformer incorporating such a catalyst for use in an exhaust gas recycle portion of an internal combustion engine powertrain is described. A powertrain incorporating such a reformer, a method of increasing the octane rating of an exhaust gas recycle stream, and a method of operating an internal combustion engine using methane-assisted combustion are also described.
摘要:
The present invention relates to molecular sieves having the structure of ITQ-32 is synthesized from a reaction mixture substantially free of fluoride ions and comprising 4,4-dimethyl, 1-cyclohexyl-piperazinium cations in its pore structure, as well as methods of making such molecular sieves and methods of using them.
摘要:
A new molecular sieve material is designated as EMM-23 and has, in its as-calcined form, an X-ray diffraction pattern including the following peaks in Table 1: TABLE 1 d-spacing (Å)Relative Intensity [100 × I/I(o)] 17.5-16.360-100 10.6-10.15-50 9.99-9.5620-70 6.23-6.061-10 5.84-5.691-10 5.54-5.401-10 4.29-4.211-10 3.932-3.8641-10 3.766-3.7045-40 3.735-3.6741-10 3.657-3.5981-10 3.595-3.5391-20
摘要:
A new molecular sieve material is designated as EMM-23 and has, in its as-calcined form, an X-ray diffraction pattern including the following peaks in Table 1: TABLE 1 d-spacing (Å)Relative Intensity [100 × I/I(o)] 17.5-16.360-100 10.6-10.15-50 9.99-9.5620-70 6.23-6.061-10 5.84-5.691-10 5.54-5.401-10 4.29-4.211-10 3.932-3.8641-10 3.766-3.7045-40 3.735-3.6741-10 3.657-3.5981-10 3.595-3.5391-20
摘要:
The present invention relates to molecular sieves having the structure of ITQ-32 is synthesized from a reaction mixture substantially free of fluoride ions and comprising 4,4-dimethyl, 1-cyclohexyl-piperazinium cations in its pore structure, as well as methods of making such molecular sieves and methods of using them.
摘要:
A molecular sieve material, EMM-25, having in its calcined form an X-ray diffraction pattern including the following peaks: d-spacing (Å)Relative Intensity [100 × I/I(o)] % 11.74-11.34 60-100 9.50-9.1030-80 8.68-8.2810-40 5.64-5.4420-60 4.52-4.4210-50 4.28-4.1810-40 3.96-3.8640-80 3.69-3.5930-70.
摘要:
ITQ-40 (INSTITUTO DE TECNOLOGÍA QUÍMICA number 40) is a new crystalline microporous material with a framework of tetrahedral atoms connected by atoms capable of bridging the tetrahedral atoms, the tetrahedral atom framework being defined by the interconnections between the tetrahedrally coordinated atoms in its framework. ITQ-40 can be prepared in silicate compositions with an organic structure directing agent. It has a unique X-ray diffraction pattern, which identifies it as a new material.