Abstract:
Aspects of the invention are associated with the discovery of processes for converting methane (CH4), present in a methane-containing feed that may be obtained from a variety of sources such as natural gas, to higher hydrocarbons (e.g., C2+ hydrocarbons) such as C2 hydrocarbons (e.g., ethane, ethylene, and acetylene) and aromatic hydrocarbons (e.g., benzene, one or more C1- or C2-substituted benzenes, and/or one or more fused ring aromatic hydrocarbons). Representative processes involve direct, non-oxidative methane conversion (NOMC), such that the need for an oxidant to form CO as an intermediate may advantageously be avoided. This reduces overall complexity and the tendency to promote unwanted side reactions that reduce hydrocarbon yields and lead to CO2 production.
Abstract:
본 발명은 1-알코올의 탈수 반응용 첨가제 및 이를 이용한 1-올레핀의 제조방법에 관한 것으로, 보다 상세하게는 바이오유래 1-알코올의 탈수 반응시, 부반응을 억제하고, 이성질체의 생성을 효과적으로 저감시켜 1-올레핀의 높은 선택도와 순도를 동시에 만족시킬 수 있을 뿐만 아니라, 1-올레핀을 고수율로 수득할 수 있어 매우 경제적인 방법으로 1-올레핀을 대량 생산할 수 있는 1-알코올의 탈수 반응용 첨가제 및 이를 이용한 1-올레핀의 제조방법에 관한 것이다.
Abstract:
Processes for aromatizing hydrocarbons include contacting the hydrocarbons with a catalyst composition comprising a metal oxide dispersed on a surface of a zeolite support, where contacting the hydrocarbons with the catalyst composition causes at least a portion of the hydrocarbons to undergo a chemical reaction to form aromatic hydrocarbons. The catalyst composition is prepared by a synthesis process that includes combining the zeolite support with a hydrocarbon solvent to form a zeolite mixture, where the hydrocarbon solvent pre-wets the pores of the zeolite support. The synthesis process further includes combining a polar solvent comprising a metal salt with the zeolite mixture to form an impregnated zeolite support. The synthesis process also includes drying the impregnated zeolite support and calcining the impregnated zeolite support to convert the metal salt to the metal oxide, thereby forming the catalyst composition.
Abstract:
Processes for dehydroaromatization of C6 paraffins to form aromatic hydrocarbons are disclosed. The processes include contacting a mixture of branched and linear paraffins with at least two catalysts to produce aromatic hydrocarbons. One catalyst has a higher relative aromatization reactivity and another catalyst has a higher relative isomerization activity. In a common example, a mixture of branched and linear hexanes is contacted with aromatization and isomerization catalysts to produce benzene.
Abstract:
A process for activating an aromatization catalyst includes contacting an aromatization catalyst with a carburizing gas in a carburization reactor at a carburization pressure in a range of greater than 300 kPa to 800 kPa, or 500 kPa to 600 kPa, to obtain a calcined aromatization catalyst. The carburizing gas provides a carbon source, preferably the carburizing gas comprises at least one of methane, ethane, propane, butane, or carbon monoxide.
Abstract:
An integrated process for converting low-value paraffinic materials to high octane gasoline and high-cetane diesel light is disclosed. The process involves: (1) oxidation of an iso-paraffin to alkyl hydroperoxide and alcohol; (2) converting the alkyl hydroperoxide and alcohol to dialkyl peroxide; (3) converting low-octane, paraffinic gasoline molecules using the dialkyl peroxides as radical initiators, thereby forming high-cetane diesel, while the dialkyl peroxide is converted to an alcohol; (4) converting the alcohol to an olefin; and (5) alkylating the olefin with iso-butane to form high-octane alkylate. The net reaction is thus conversion of iso-paraffin to high-octane gasoline alkylate, and conversion of low-octane paraffinic gasoline to high-cetane diesel.
Abstract:
본 발명은 촉매의 재현성이 우수한 부타디엔의 제조방법에 관한 것으로, 보다 상세하게는 금속 산화물 촉매가 충진된 반응기에 구성성분으로 부텐, 산소, 질소 및 스팀을 포함한 반응물을 유입시켜, 반응온도 300 내지 450 ℃ 하에 산화적 탈수소화 반응을 수행하는 반응단계; 상기 반응단계 이후 상기 구성성분 각각의 유량 변화율이 ±40% 미만인 범위 내에서 상기 반응물 공급을 유지, 또는 상기 반응물 중 부텐의 공급만 중단한 뒤 상기 반응기를 200 ℃ 이하 내지 70 ℃ 초과 범위내로 냉각시키는 제1차 냉각단계; 및 상기 1차 냉각단계 이후 상기 반응물 공급을 중단, 또는 최소한 상기 반응물 중 부텐의 공급을 중단하고, 반응기를 70 ℃ 이하로 냉각시키는 제2차 냉각단계;를 포함하는 것을 특징으로 하는 촉매의 재현성이 우수한 부타디엔의 제조방법에 관한 것이다. 본 발명에 따르면, 반응공정의 운전을 중단할 필요성이 있어 산화적 탈수소화 반응을 중단한 경우, 이후 재가동시 발생 될 수 있는 촉매의 비활성화를 방지하여 운전 시간 및 비용의 손실을 줄일 수 있는 효과가 있다.
Abstract:
The invention relates to catalytic aromatization, e.g., for the conversion of nonaromatic hydrocarbon to higher-value aromatic hydrocarbon, to catalysts useful for such aromatization, and to methods for making such catalysts. The aromatization catalyst comprises at least one molecular sieve component and at least one dehydrogenation component, and the molecular sieve component is present in an amount of 80 wt% or more.
Abstract:
The present invention relates to a process for the separation of aromatic hydrocarbons from a hydrocarbon feed stream comprising contacting a hydrocarbon feed stream with a solvent for aromatics (aromatics solvent) to provide an aromatics-laden solvent stream and subjecting the aromatics-laden solvent stream to solvent regeneration to provide regenerated aromatics solvent and an aromatics stream.