摘要:
A process for preparing primarily gamma-butyrolactone comprises the step of contacting under suitable reaction conditions a succinic anhydride containing feed stream with hydrogen gas, in the presence of a catalyst comprising metallic nickel and an aluminum phosphate containing support.
摘要:
A method of screening catalysts for liquid-phase selective hydrogenation by preparing a test catalyst by adding a promoter to a reference catalyst; preparing a liquid reactant stream comprising C2H2 dissolved in n-methyl-2-pyrrolidone; testing the test and reference catalysts by contacting the reactant stream and gas mixture comprising hydrogen and carbon monoxide in continuous flow with the test catalyst and reference catalyst, respectively, at selective hydrogenation reaction conditions to produce a product stream, condensing substantially all of the n-methyl-2-pyrrolidone from the product stream; measuring the concentrations of products comprising C2H2, C2H4, and C2H6 in the product stream at steady state; determining performance parameters for the test catalyst and the reference catalyst comprising the respective C2H2 conversion Sc and C2H4 selectivity relative to C2H6 Ss; and comparing the test catalyst performance parameters to those for the reference catalyst.
摘要翻译:一种筛选用于液相选择性氢化的催化剂的方法,通过向参考催化剂中加入助催化剂制备试验催化剂; 制备包含溶解在正甲基-2-吡咯烷酮中的C2H2的液体反应物流; 通过在选择性氢化反应条件下分别使包含氢气和一氧化碳的反应物流和连续流动的气体混合物与测试催化剂和参考催化剂分别接触来测试测试和参考催化剂,以产生产物流,基本上将所有的n- 甲基-2-吡咯烷酮; 在稳定状态下测量产物流中包含C2H2,C2H4和C2H6的产物的浓度; 确定测试催化剂和参考催化剂的性能参数,其包含相对于C 2 H 6 S的相应的C 2 H 2转化率Sc和C 2 H 4选择性; 并将试验催化剂性能参数与参考催化剂的参数进行比较。
摘要:
A composition and method for preparation of a catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a Group VIII metal and a Group IB, Group IIB, Group IIIA, and/or Group VIIB promoter on a particulate support.
摘要:
A method of screening catalysts for liquid-phase selective hydrogenation by preparing a test catalyst by adding a promoter to a reference catalyst; preparing a liquid reactant stream comprising C2H2 dissolved in n-methyl-2-pyrrolidone; testing the test and reference catalysts by contacting the reactant stream and gas mixture comprising hydrogen and carbon monoxide in continuous flow with the test catalyst and reference catalyst, respectively, at selective hydrogenation reaction conditions to produce a product stream, condensing substantially all of the n-methyl-2-pyrrolidone from the product stream; measuring the concentrations of products comprising C2H2, C2H4, and C2H6 in the product stream at steady state; determining performance parameters for the test catalyst and the reference catalyst comprising the respective C2H2 conversion Sc and C2H4 selectivity relative to C2H6 Ss; and comparing the test catalyst performance parameters to those for the reference catalyst.
摘要翻译:一种筛选用于液相选择性氢化的催化剂的方法,通过向参考催化剂中加入助催化剂制备试验催化剂; 制备包含溶解在正甲基-2-吡咯烷酮中的C2H2的液体反应物流; 通过在选择性氢化反应条件下分别使包含氢气和一氧化碳的反应物流和连续流动的气体混合物与测试催化剂和参考催化剂分别接触来测试测试和参考催化剂,以产生产物流,基本上将所有的n- 甲基-2-吡咯烷酮; 在稳定状态下测量产物流中包含C2H2,C2H4和C2H6的产物的浓度; 确定测试催化剂和参考催化剂的性能参数,其包含相对于C 2 H 6 S的相应的C 2 H 2转化率Sc和C 2 H 4选择性; 并将试验催化剂性能参数与参考催化剂的参数进行比较。
摘要:
A composition, containing vanadium and a support, wherein at least a portion of the vanadium has crystallite sizes of less than about 100 Å as determined by an analytical method such as X-Ray Diffraction, is disclosed. A method of preparing such composition is also disclosed. The composition is employed in a process to remove a heavy metal from a gaseous feed stream which can optionally include a separate mercury adsorption stage.
摘要:
A composition and method for preparation of a catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a Group VIII metal and a Group IB, Group IIB, Group IIIA, and/or Group VIIB promoter on a particulate support.
摘要:
Compositions and methods for preparing mesoporous materials from low Si/Al ratio zeolites. Such compositions can be prepared by acid wash and/or isomorphic substitution pretreatment of low Si/Al ratio zeolites prior to introduction of mesoporosity.
摘要:
A composition, containing vanadium and a support, wherein at least a portion of the vanadium has crystallite sizes of less than about 100 Å as determined by an analytical method such as X-Ray Diffraction, is disclosed. A method of preparing such composition is also disclosed. The composition is employed in a process to remove a heavy metal from a gaseous feed stream which can optionally include a separate mercury adsorption stage.
摘要:
The invention provides methods of recovering a pore-forming agent from an inorganic material that defines a plurality of mesopores having a controlled cross sectional area to form a mesostructure having long-range crystallinity and also to methods of making one or more mesostructures that features removal, recovery, and/or reuse of the pore-forming agent. Suitable pore-forming agents include, for example, surfactants.
摘要:
A process and catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a reactant comprising an alkyne and a non-hydrocarbon solvent/absorbent, contacting the reactant stream with a hydrogen-containing stream in the presence of a supported, promoted, Group VIII catalyst, removing the solvent/absorbent, and recovering the alkene product.