compounds with one or more alkylalumoxanes and one or more alkyls or hydrides of a metal selected from the group consisting of the Group Ia, IIa, and IIa metals and a hyrogenation process wherein said catalyst is used to hydrogenate compounds containing ethylenic and/or aromatic unsaturation...
reactions, wherein the raw material for synthesis is biogas and lower C2-C5 alcohols obtained by the inventive method wherein the amino acids leucine, isoleucine, and valine, or a mixture thereof, optionally obtained from yeast autolysate, is used as a biocatalyst at the stage of fermentation....
Catalysts and polymerization processes wherein these catalysts are usedofA catalyst is prepared by combining a bis(cyclopentadienyl)zirconium compound which may be represented by one of the following general formulae: (A-Cp)MX1X2; (A-Cp)MX'1X'2; (A-Cp)ML; and (Cp*)(CpR)MX1 Wherein: ...
aA process for the efficient production of diisopropyl ether where catalytic distillation is used to increase the yield of product beyond thermodynamic equilibrium limitations has been developed. In a hydration zone the propylene in a feedstock is reacted with water in the presence of a catalyst to...
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aHeterogeneous catalysts can be divided into two types; those for use in fixed-bed processing wherein the catalyst is stationary and the reactants pass upward (flooded-bed) or downward (trickle-bed) over it, 异种催化剂可以被划分成二个类型; 那些用于固定床处理,催化剂固定式和反应剂通过向上(...
/ Navigator is ready Documentation / Swift / Dictionary / first(where:) Language: Swift API Changes: NoneInstance Method first(where:) Returns the first element of the sequence that satisfies the given predicate. iOS 8.0+ iPadOS 8.0+ macOS 10.10+ Mac Catalyst 13.0+ tvOS 9.0+ watchOS 2.0...
This invention relates to improvements in catalytic units for lighters of the flameless type wherein a catalyst is employed which becomes incandescent in coaction with a vaporizable fluid, in the presence of air, andis in part a continuation of application Serial Number 100,297, filed September....
a我的英文不是很好,希望可以和你学习 My English is not very good, hoped may study with you[translate] aSand was sometimes used instead of water 沙子有时使用了而不是水[translate] a校团委 School Youth Corps Committee[translate] a今晚可以见面吗 Tonight may meet[translate] ...
The United Nations can be an important catalyst and knowledge-brokeronwhatworks,when,andwhy;thus, the Committee recommends to the Secretariat [...] daccess-ods.un.org daccess-ods.un.org 联合国可以作为一个重要的推动者,在哪些做法在什么时候和为什么获得成 功的问题上,担任知识中介的角色;因此,委员...