摘要:
The invention concerns a method for reactive separation of mixtures containing hydrocarbons and oxygenated hydrocarbons, by contacting a mixture of hydrocarbons such as C.sub.2 to C.sub.26 hydrocarbons and mixtures thereof and oxygenated hydrocarbons, such as C.sub.2 to C.sub.40 oxygenated hydrocarbons and mixtures thereof to form a mixture of hydrocarbons and lower molecular weight oxygenated hydrocarbons and heating the mixture in water at temperature typically from about and pressure sufficient to cleave the oxygenated hydrocarbons to lower molecular weight products to form a liquid layer containing water soluble reaction products and an organic layer containing primarily hydrocarbons.
摘要:
The present invention provides for a simplified process for converting ethers into their corresponding alcohols comprising forming an aqueous mixture of the ether and at least about 50% by weight water and heating the mixture under autogeneous pressure at a temperature of from about 250.degree. to 450.degree. C., more preferably from about 250.degree. C. up to the critical temperature of water which is about 374.degree. C. Heating is continued for a period of time sufficient to convert at least about 20% by weight of the ether, usually from about 5 up to about 120 minutes, depending on temperature and the amount of water present, and the identity of the starting ether feedstock.The process may be characterized as an aquathermolysis reaction wherein the reaction proceeds in water primarily through ionic routes rather than through free radical routes. Accordingly, relatively high conversion rates and good yields of alcohol and other reaction by-products may be obtained without the necessity of using a catalyst in the process.
摘要:
This invention is directed to a process for pretreating coal preliminary to a primary liquefaction or hydroconversion block. In the process, a coal feed, slurried in a solvent, is reacted with carbon monoxide in the presence of a chemical promoter at an elevated temperature and pressure. The promoter enhances the depolymerization and hydrogenation of the coal during pretreatment.
摘要:
In a method of synthesizing a silicoaluminophosphate molecular sieve having 90+% CHA framework-type character, a reaction mixture is prepared comprising sources of water, silicon, aluminum, and phosphorus, as well as an organic template. In one aspect, the reaction mixture is heated at more than 10° C./hour to a crystallization temperature and is retained at the crystallization temperature or within the crystallization temperature range for a crystallization time from 16 hours to 350 hours to produce the silicoaluminophosphate molecular sieve. In another aspect, the reaction mixture is heated at less than 10° C./hour to a crystallization temperature from about 150° C. to about 225° C. and is then retained there for less than 10 hours to produce the silicoaluminophosphate molecular sieve. The molecular sieve can then be recovered from the reaction mixture and, preferably, used in a hydrocarbon conversion process, such as oxygenates to olefins.
摘要:
In a method of synthesizing a silicoaluminophosphate molecular sieve having 90%+CHA framework type character, a reaction mixture is prepared comprising first combining a reactive source of aluminum with a reactive source of phosphorus to form a primary mixture that is aged. A reactive source of silicon and a template for directing the formation of the molecular sieve can then be added to form a synthesis mixture. Crystallization is then induced in the synthesis mixture. Advantageously, (i) the source of silicon comprises an organosilicate, (ii) the source of phosphorus optionally comprises an organophosphate, and (iii) the crystallized silicoaluminophosphate molecular sieve has a crystal size distribution such that its average crystal size is not greater than 5 μm. The molecular sieve can then preferably be used in a hydrocarbon (oxygenates-to-olefins) conversion process.
摘要:
This invention, in one embodiment, is drawn to a process for forming olefin product by contacting an oxygenate with an olefin-forming catalyst under supercritical conditions to form an olefin product. This invention also relates to methods for activating molecular sieve catalyst, regenerating molecular sieve catalyst, and forming and/or disposing a co-catalyst within a molecular sieve catalyst, each under supercritical conditions.
摘要:
The present invention relates to a method for converting a feed including an oxygenate to a product including a light olefin. In particular, this invention relates to converting an oxygenate feedstock with a silicoaluminophosphate catalyst to a product including a light olefin in a reaction apparatus. More particularly, this invention provides a means by which an optimum level of coke can be determined and utilized to generate an optimum or near-optimum yield of light olefins such as ethylene and propylene in a oxygenates to olefins system.
摘要:
The invention relates to a feed vaporization and introduction system for an OTO reactor. The invention includes: means for vaporizing at least a portion of the feed; means for contacting the at least partially vaporized feed with a first catalyst comprising one or more metals from Groups 2, 3, and 4 of the Periodic Table and/or one or more metals in the Lanthanide and Actinide series.
摘要:
The invention relates to a conversion process for making olefin(s) using a molecular sieve catalyst composition. More specifically, the invention is directed to a process for converting a feedstock comprising an oxygenate in the presence of a molecular sieve catalyst composition, wherein the feedstock is free of or substantially free of metal salts.
摘要:
The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst composition. In particular, the invention is directed to making a formulated molecular sieve catalyst composition from a slurry of formulation composition of a synthesized molecular sieve that has not been fully dried, a binder and an optional matrix material. In a more preferred embodiment, the weight ratio of the binder to the molecular sieve and/or the solid content of the slurry is controlled to provide an improved attrition resistant catalyst composition, particularly useful in a conversion process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.