摘要:
A method for converting lignin to a phenol product, the method comprising contacting a zeolite catalyst with a lignin under reaction conditions sufficient to produce the phenol product at a yield of equal to or greater than about 50%. A method for converting lignin to a mixed phenol product, the method comprising contacting a large-pore zeolite catalyst with a Kraft lignin under reaction conditions comprising a reaction temperature of from about 550 °C to about 850 °C to produce the mixed phenol product at a yield of equal to or greater than about 50%.
摘要:
A method for forming a catalyst can comprise: heating a Ge-ZSM-5 zeolite powder at a temperature of 400 to 600C; ion-exchanging the heat-treated zeolite powder with an alkali metal and impregnating the heat-treated zeolite powder with noble metal; heating the ion-exchanged, impregnated zeolite powder to a temperature of 250 to 350C; mixing the second heat-treated zeolite powder with a solid silica binder and a colloidal silica binder to form a mixture, wherein if the solid silica has a purity of less than or equal to 66 wt% of silica oxide based on the total weight of the solid silica, then the mixture is free of an extrusion aide and the colloidal silica has a particle size of less than 20 nm as measured along a major axis; forming the mixture into a shaped body; and heating the shaped body to result in the catalyst.
摘要:
A zeolite catalyst that may be used in aromatic alkylation is prepared by treating a zeolite with a phosphorus compound. The phosphorus-treated zeolite is calcined and contacted with liquid water, whereby an amount of phosphorus is removed from the phosphorus-treated zeolite. The phosphorus -treated zeolite is then heated. A method of preparing an aromatic product may also be carried out by contacting the prepared zeolite catalyst with an aromatic alkylation feed of an aromatic compound and an alkylating agent under reaction conditions suitable for aromatic alkylation.
摘要:
This invention relates to a process for pretreating a zeolite catalyst, specifically a zeolite which has been modified with phosphorus. The catalyst may be used in a process for alkylation of aromatics, specifically toluene methylation. The pretreatment is first to contact the catalyst with the process reactants used in a process for alkylation of aromatics for at least two hours at conditions to produce an alkylated aromatic product and then with a gaseous stream containing oxygen at a temperature and for a time until there is no oxygen consumption. The zeolite may be a MFI zeolite. This pretreatment procedure for a phosphorus-modified zeolite catalyst produces a catalyst which has increased run time, i.e., decreased deactivation rate, compared to a fresh catalyst, even after successive regenerations.
摘要:
A zeolite catalyst is prepared by treating a zeolite with a phosphorus compound to form a phosphorus-treated zeolite. The phosphorus-treated zeolite is heated to a temperature of about 3000C or higher and combined with an inorganic oxide binder material to form a zeolite-binder mixture. The zeolite-binder mixture is heated to a temperature of about 4000C or higher to form a bound zeolite catalyst. The bound zeolite may exhibit at least two 31P MAS NMR peaks with maxima at from about 0 to about -55 ppm, with at least one peak having a maximum at from about -40 to about -50 ppm. Zeolites containing 10-oxygen ring pores that have been prepared in such a way may be used in aromatic . alkylation by contacting the bound zeolite catalyst with an aromatic alkylation feed of an aromatic compound and an alkylating agent under reaction conditions suitable for aromatic alkylation.
摘要:
A method of modifying a zeolite catalyst to increase selectivity of the catalyst is achieved by dissolving alumina in a phosphorus-containing acid solution, and treating the zeolite catalyst with the dissolved alumina solution. A method of preparing an aromatic product, such as a xylene product, is also achieved by contacting the modified zeolite catalyst with an aromatic hydrocarbon, such as toluene, and an alkylating agent, such as methanol, under reaction conditions suitable for aromatic alkylation. For xylene products the aromatic hydrocarbon may be toluene and the reaction conditions may be suitable for at least one of toluene methylation and transalkylation.
摘要:
A method of preparing a xylene product is carried out by providing a reactor containing a non-steamed, phosphorus-treated ZSN-5-type zeolite catalyst. The catalyst is contacted with a toluene/methanol feed and a cofeed of hydrogen under reactor conditions suitable for the methylation of toluene. Water is introducing into the reactor during the methylation reaction under conditions that provide substantially no structural aluminum loss of die catalyst from such introduction of water.
摘要:
A method of preparing a xylene product is carried out by providing a reactor containing a non-steamed, phosphorus-treated ZSN-5-type zeolite catalyst. The catalyst is contacted with a toluene/methanol feed and a cofeed of hydrogen under reactor conditions suitable for the methylation of toluene. Water is introducing into the reactor during the methylation reaction under conditions that provide substantially no structural aluminum loss of die catalyst from such introduction of water.
摘要:
Disclosed is a method for converting an alkyl halide to an olefin. The method can include contacting a zeolite catalyst having a chemical formula of M y/n „H (x-y) Al x Si (96-x) O 192 , where M is a metal cation having a valence of n under reaction conditions sufficient to produce an olefin hydrocarbon product comprising C 2 to C 4 olefins. M can include cations of metals from Groups IA, IIA, IIIA. IVB, VB, VIB VIIB, IB, IIB, IIIA or IVA, or any combination of metal cations thereof and y is 0.4 ≤ y ≤ 5.0.
摘要翻译:公开了将烷基卤转化为烯烃的方法。 该方法可以包括使化学式为M y / n“H(xy)Al x Si(96-x)O192的沸石催化剂接触,其中M是在足以产生 包括C2-C4烯烃的烯烃烃产物。 M可以包括IA,IIA,IIIA族金属的阳离子。 IVB,VB,VIB VIIB,IB,IIB,IIIA或IVA,或其金属阳离子的任何组合,y为0.4≤y≤5.0。
摘要:
A method for forming a catalyst can comprise: heating a Ge-ZSM-5 zeolite powder at a temperature of 400 to 600C; ion-exchanging the heat-treated zeolite powder with an alkali metal and impregnating the heat-treated zeolite powder with noble metal; heating the ion-exchanged, impregnated zeolite powder to a temperature of 250 to 350C; mixing the second heat-treated zeolite powder with a solid silica binder and a colloidal silica binder to form a mixture, wherein if the solid silica has a purity of less than or equal to 66 wt% of silica oxide based on the total weight of the solid silica, then the mixture is free of an extrusion aide and the colloidal silica has a particle size of less than 20 nm as measured along a major axis; forming the mixture into a shaped body; and heating the shaped body to result in the catalyst.