Abstract:
Methods for preparing bound non-acidic germanium zeolite catalysts arc disclosed, where the preparation is reproducible and scalable and where the catalysts have similar or the same activity and selectivities of a standard naphtha aromatization catalyst and methods for aromatizing naphtha.
Abstract:
Disclosed are stable catalysts, and methods for their use, that are capable of producing an olefin from an alkyl halide. The catalysts include a phosphorus-treated silicoalummophosphate (SAPO) having a structure of X/SAPO or X/Z-SAPO, where X includes a non-framework phosphorus and Z is one or more elements from Groups 2A, 3A, IVB, VIB, VIIB, VIII, IB of the Periodic Table, or compounds thereof comprised in the SAPO framework.
Abstract:
Disclosed is a method for converting an alkyl halide to an olefin. The method includes contacting a silicoaluminophosphate (SAPO) catalyst with a feed that includes an alkyl halide under reaction conditions sufficient to produce an olefin hydrocarbon product that includes C2 to C4 olefins. The SAPO catalyst has bimodal acidity designated as weak acid sites and strong acid sites. The weak acid concentration is less than 0.55 mmol/g-cat and the total acid concentration is less than 1.5 mmol/g-cat.
Abstract:
Disclosed is a method for converting an alkyl halide to an olefin. The method can include contacting a zeolite catalyst comprising HZSM-5 having a silica to alumina (SAR) ratio of at least 30 with a feed that includes an alkyl halide under reaction conditions sufficient to produce an olefin hydrocarbon product comprising C2 to C4 olefins, wherein the selectivity of the C2 to C4 olefins is at least 85% at 20% alkyl halide conversion.
Abstract:
A catalyst and its preparation and use are disclosed. The catalyst is a silicalite having germanium (Ge) included within the framework of the silicalite prepared in a particular manner. The catalyst may be used in a method of converting hydrocarbons wherein a hydrocarbon feed is contacted with the catalyst. The catalyst may be formed by preparing an aqueous reaction mixture of a silica-containing silicalite precursor material and a germanium source. The reactants of the reaction mixture are allowed to react. The reacted reaction mixture is heated under conditions to form crystals of a silicalite having germanium included within the framework of the silicalite. The crystals are then calcined to form the catalyst. In certain embodiments, a noble metal may be deposited upon the germanium-containing silicalite.
Abstract:
This invention relates to a process for the increasing the octane number of a naphtha hydrocarbon feed having a predominantly paraffin content with a germanium-containing zeolite catalyst. The catalyst is a non-acidic germanium zeolite on which a noble metal, such as platinum, has been deposited. The zeolite structure may be of MTW, MWW, MEL, TON, MRE, FER, MFI, BEA, MOR, LTL or MTT. The zeolite is made non-acidic by being base-exchanged with an alkali metal or alkaline earth metal, such as cesium, potassium, sodium, rubidium, barium, calcium, magnesium and mixtures thereof, to reduce acidity. The catalyst is sulfur tolerant. The hydrocarbon feed may contain sulfur up to 1000 ppm. The present invention could be applicable to a feedstream which is predominantly naphthenes and paraffins.
Abstract:
Methods for preparing bound non-acidic germanium zeolite catalysts are disclosed, where the preparation is reproducible and scalable and where the catalysts have similar or the same activity and selectivities of a standard naphtha aromatization catalyst and methods for aromatizing naphtha.
Abstract:
A catalyst and its preparation and use are disclosed. The catalyst is a silicalite having germanium (Ge) included within the framework of the silicalite prepared in a particular manner. The catalyst may be used in a method of converting hydrocarbons wherein a hydrocarbon feed is contacted with the catalyst. The catalyst may be formed by preparing an aqueous reaction mixture of a silica-containing silicalite precursor material and a germanium source. The reactants of the reaction mixture are allowed to react. The reacted reaction mixture is heated under conditions to form crystals of a silicalite having germanium included within the framework of the silicalite. The crystals are then calcined to form the catalyst. In certain embodiments, a noble metal may be deposited upon the germanium-containing silicalite.