Abstract:
This disclosure relates to a catalyst system adapted for processing aromatic feedstreams comprising C9+ aromatic feedstock to produce at least one xylene.
Abstract:
This disclosure relates to a process for regenerating a catalyst composition, wherein the catalyst composition comprising a molecular sieve and at least 10 wt. % coke having a C/H ratio in the range of 0.26 to 5, the process comprising (a) contacting the catalyst composition with a first oxidative medium having oxygen and water at first conditions sufficient to form a first regenerated catalyst composition having at least 50 wt. % less coke than the catalyst composition; and then (b) contacting at least a portion of the first regenerated catalyst composition with a second oxidative medium having oxygen, and optionally water, at second conditions sufficient to form a second regenerated catalyst composition having at least 50 wt % less coke than the first regenerated catalyst composition, wherein the catalyst composition in step (a) and the first regenerated catalyst in step (b) have contacted total amount of water in the range of 1 to 50 weight water per weight of the second regenerated catalyst composition.
Abstract:
The present invention relates to processes for forming mixed alcohols containing methanol and ethanol. The mixed alcohol can then be used as a feedstock for an oxygenate to olefin reaction system for conversion thereof to ethylene, propylene, and the like. In addition, the olefins produced by the oxygenate to olefin reaction can then be used as monomers for a polymerization of olefin-containing polymers and/or oligomers.
Abstract:
A gas-solids reaction system is provided for improving product recovery in a multiple reactor reaction system. An oxygenate feedstock, desirably of high concentration in oxygenate, is reacted with a catalyst having a low to modest acidity and a Si/Al2 ratio of from 0.10 to 0.32. The reaction occurs in a reaction zone of a fluidized bed reactor at an oxygenate partial pressure of at least 45 psia and a reactor gas superficial velocity of at least 10 ft/s, conveying catalyst through the reaction zone to a circulation zone. The catalyst undergoes displacement with an inert gas in the circulation zone at a displacement gas superficial velocity of at least 0.03 m/s, after which at least a portion, preferably a large portion is returned to the reaction zone. The catalyst has a residence time in the circulation zone of at least twice that of the residence time of catalyst in the reaction zone. Extraordinary catalyst activity at high olefin selectivity results despite insignificant changes in coke on catalyst and coke yield when compared to lower pressure operations.
Abstract:
This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
Abstract:
This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
Abstract:
The present invention relates to processes for forming mixed alcohols containing methanol and ethanol. The mixed alcohol can then be used as a feedstock for an oxygenate to olefin reaction system for conversion thereof to ethylene, propylene, and the like. In addition, the olefins produced by the oxygenate to olefin reaction can then be used as monomers for a polymerization of olefin-containing polymers and/or oligomers.
Abstract:
The invention relates to a process for producing alkylated aromatic hydrocarbons, preferably with an oxygen or sulfur containing alkylating agent, in the presence of a multi-component molecular sieve catalyst composition that includes a molecular sieve and an active metal oxide. The invention is also directed to methods of making and formulating the multi-component molecular sieve catalyst composition useful in producing alkylated aromatics.
Abstract:
A porous crystalline material is described having the chabazite framework type and having a composition involving the molar relationship: X2O3:(n)YO2, wherein X is a trivalent element, such as aluminum, boron, iron, indium, and/or gallium; Y is a tetravalent element such as silicon, tin, titanium and/or germanium; and n is greater than 100 and typically greater than 200, such as about 300 to about 4000, for example from about 400 to about 1200. The material is synthesized in a fluoride medium and exhibits activity and selectivity in the conversion of methanol to lower olefins, especially ethylene and propylene.
Abstract:
A process is described for converting an oxygenate-containing feedstock into one or more olefins in which the feedstock is contacted in a reaction zone with a fluidized bed of a particulate catalyst composition comprising a molecular sieve and at least one metal oxide having an uptake of carbon dioxide at 100° C. of at least 0.03 mg/m2 of the metal oxide whereby at least part of the feedstock is converted into a product stream comprising one or more olefins and a carbonaceous material is deposited on the catalyst composition to produce a coked catalyst composition. The coked catalyst composition is separated from the product stream and divided into at least first and second portions. The first portion of the coked catalyst composition is contacted with a regeneration medium in a regeneration zone under conditions to remove at least part of the carbonaceous material from the coked catalyst composition and produce a regenerated catalyst composition, which is subsequently recycled to the reaction zone. The second portion of the coked catalyst composition is also recycled to the reaction zone but without being initially contacted with a regeneration medium.
Abstract translation:描述了一种用于将含氧化合物的原料转化成一种或多种烯烃,其中原料在反应区中与包含分子筛和至少一种具有碳吸收性的金属氧化物的颗粒催化剂组合物的流化床接触的烯烃 二氧化碳在100℃下为至少0.03mg / m 2的金属氧化物,由此至少部分原料转化为包含一种或多种烯烃的产物流,并将碳质材料沉积在 用于生产焦化催化剂组合物的催化剂组合物。 将焦炭催化剂组合物与产物流分离并分成至少第一和第二部分。 焦化催化剂组合物的第一部分与再生区中的再生介质接触,在从焦炭催化剂组合物中除去至少一部分碳质材料的条件下,并产生再生催化剂组合物,随后再循环到反应区。 焦炭催化剂组合物的第二部分也被循环到反应区,但不最初与再生介质接触。