摘要:
The present invention relates to new crystalline molecular sieve SSZ-75 having STI framework topology prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent and its use in gas separations.
摘要:
A process for synthesizing a DDR framework-type molecular sieve comprises crystallizing a reaction mixture comprising water, a source of silicon, and a structure directing agent, Q, selected from the group consisting of a methyltropinium salt, a 2,6,N,N-tetramethylpiperidinium salt, a 2,N,N-trimethylpiperidinium salt and mixtures thereof, wherein the reaction mixture has a molar ratio of water to silicon from 5 to 80 and a molar ratio of alkali or alkaline earth metal, M, to silicon less than 0.01.
摘要:
A molecular sieve material designated as EMM-22 has, in its calcined form, an X-ray diffraction pattern including the following peaks in Table 1: TABLE 1 Relative Intensity d-spacing (Å)[100 × I/I(o)] 11.03 ± 0.40VS 9.91 ± 0.20W 6.70 ± 0.04VW 4.39 ± 0.02W 4.06 ± 0.04W 3.85 ± 0.02M 3.37 ± 0.02W
摘要翻译:称为EMM-22的分子筛材料在其煅烧形式中具有包括表1中的以下峰的X射线衍射图:表1相对强度d-间隔(Å)[100×I / I(o)] 11.03±0.40 VS 9.91±0.20 W 6.70±0.04 VW 4.39±0.02 W 4.06±0.04 W 3.85±0.02 M 3.37±0.02 W
摘要:
A method of treating a cold-start engine exhaust gas stream comprising hydrocarbons and other pollutants, the method comprising: flowing the exhaust gas stream over a molecular sieve bed, the molecular sieve bed comprising an alkali metal cation-exchanged molecular sieve having intersecting 10- and 12-membered ring pore channels, to provide a first exhaust stream; flowing the first exhaust gas stream over a catalyst to convert any residual hydrocarbons and other pollutants contained in the first exhaust gas stream to innocuous products to provide a treated exhaust stream; and discharging the treated exhaust stream into the atmosphere.
摘要:
The present invention is directed to a borosilicate ZSM-48 molecular sieve having a mole ratio of between 40 and 400 of silicon oxide to boron oxide, synthesized using novel structure directing agents. Also disclosed are processes using a borosilicate ZSM-48 as a catalyst for the selective hydroconversion of heavy normal paraffins into lighter normal paraffin products, with minimal formation of isoparaffins.
摘要:
A method of preparing a crystalline material, herein designated as SSZ-74, comprising contacting under crystallization conditions (1) a source of silicon oxide, (2) a source of another metal oxide, (3) fluoride ions, and (4) a structure directing agent comprising a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium) dication. A method of preparing a crystalline material having a defined X-ray powder diffraction pattern, by (1) forming a reaction mixture having one or more metal oxides, one being silicon oxide, and a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium) dication, (2) maintaining the reaction mixture at an elevated temperature until crystals are formed, (3) separating the crystalline material, and (4) optionally calcining the crystalline material. A method for preparing a crystalline material, comprising (1) forming a defined reaction mixture, (2) maintaining the reaction mixture under conditions where crystals are formed, (3) separating out the crystalline material, and (4) water-washing and drying the crystalline material such that it has a defined X-ray powder diffraction pattern.
摘要:
A process for synthesizing a DDR framework-type molecular sieve comprises crystallizing a reaction mixture comprising water, a source of silicon, and a structure directing agent, Q, selected from the group consisting of a methyltropinium salt, a 2,6,N,N-tetramethylpiperidinium salt, a 2,N,N-trimethylpiperidinium salt and mixtures thereof, wherein the reaction mixture has a molar ratio of water to silicon from 5 to 80 and a molar ratio of alkali or alkaline earth metal, M, to silicon less than 0.01.
摘要:
The present invention is directed to processes using a borosilicate ZSM-48 as a catalyst for the selective hydroconversion of heavy normal paraffins into lighter normal paraffin products, with minimal formation of isoparaffins. The borosilicate ZSM-48 molecular sieve has a mole ratio of between 40 and 400 of silicon oxide to boron oxide, synthesized using novel structure directing agents.
摘要:
The present invention provides methods for reducing pain in a subject in need of such pain reduction by delivering, e.g., intrathecally or epidurally, a volatile anesthetic such as a halogenated ether compound in an amount effective to reduce pain. Chronic or acute pain may be treated, or the anesthetic may be delivered to the subject to anesthetize the subject prior to a surgery. In certain embodiments, isoflurane, halothane, enflurane, sevoflurane, desflurane, methoxyflurane, xenon, and mixtures thereof may be used. Dosing regimens including a one-time administration, continuous and/or periodic administration are contemplated.
摘要:
The present invention provides methods for reducing pain in a subject in need of such pain reduction by delivering, e.g., intrathecally or epidurally, a volatile anesthetic dissolved in a solution comprising an extractive solvent, e.g., DMSO or NMP, in an amount effective to reduce pain. Chronic or acute pain may be treated, or the anesthetic may be delivered as a regional anesthesia to a subject to anesthetize a portion the subject prior to a surgery, hi certain embodiments, isoflurane, halothane, enflurane, sevoflurane, desflurane, methoxyflurane, or mixtures thereof may be used. Dosing regimens including a one-time administration, continuous and/or periodic administration are contemplated.