The role of alkali modifiers (Li, Na, K, Cs) in activity of 2%Pd/Al2O3 catalysts for 2-ethyl-9,10-anthraquione hydrogenation
作者:R. Kosydar、A. Drelinkiewicz、E. Lalik、J. Gurgul
DOI:10.1016/j.apcata.2011.05.036
日期:2011.7
promoters are introduced into alumina matrix. The microcalorimertic experiments of CO adsorption prove the interaction of CO with catalysts leading to stronger bonding of carbonmonoxide by alkali doped catalysts. The presence of alkali promoters in Pd/Al2O3 catalyst plays an essential role in the whole eAQ hydrogenation process. The nature of alkali promoter and its content (Me/Pd atomic ratio) in catalyst
目前的研究集中于碱改性剂(Li,Na,K,Cs)在2%Pd / Al 2 O 3催化剂催化2-乙基-9,10-蒽醌(eAQ)加氢中的作用。通过用适当的碱金属碳酸盐浸渍预还原的2%Pd / Al 2 O 3催化剂,可以制得各种含量的碱改性剂(Me / Pd摩尔比范围为0.5至4,Me-碱金属)。XPS,EDS和TEM测量表明,碱促进剂被引入到氧化铝基质中。CO吸附的微热力学实验证明了CO与催化剂的相互作用导致碱掺杂催化剂使一氧化碳更牢固地结合。Pd / Al 2 O 3中碱助催化剂的存在催化剂在整个eAQ加氢过程中起着至关重要的作用。碱促进剂的性质及其在催化剂中的含量(Me / Pd原子比)非常重要。随着助剂的碱度增加,从Li变为Cs,由它们的存在引起的所有效应都变得更强。在碱掺杂催化剂的存在下,形成的2-乙基氧杂蒽酮(OXO,2-乙基-9,10-蒽氢醌的异构体)的含量高于未掺杂的2%Pd /
[EN] PART-STREAM DISTILLATION<br/>[FR] DISTILLATION DE FLUX PARTIEL
申请人:BASF SE
公开号:WO2016066629A1
公开(公告)日:2016-05-06
A continuous process for the preparation of propylene oxide, comprising (a) reacting propene with hydrogen peroxide in a reaction apparatus in the presence of acetonitrile as solvent, obtaining a stream SO containing propylene oxide, acetonitrile, water, at least one further component B wherein the normal boiling point of the at least one component B is higher than the normal boiling point of acetonitrile; (b) separating propylene oxide from SO, obtaining a stream SI containing acetonitrile, water and the at least one further component B; (c) dividing S1 into two streams S2 and S3; (d) subjecting S3 to a vapor-liquid fractionation in a first fractionation unit, obtaining a vapor fraction stream S4 a being depleted, relative to S3, of at least one of the at least one component B and obtaining a liquid bottoms stream S4b, and subjecting at least part of the vapor fraction stream S4 a to a vapor-liquid fractionation in a second fractionation unit, obtaining a vapor fraction stream S4c and a liquid bottoms stream S4 being depleted, relative to S4a, of at least one of the at least one component B; (e) recycling at least a portion of S4, optionally after work-up, to (a).
Enhanced AQ hydrogenation activity by hydrophobic functionalization of Pd/SBA-15 catalyst.
通过对Pd/SBA-15催化剂进行疏水功能化,增强了其对AQ氢化反应的活性。
The effect of solvents on the rate of catalytic hydrogenation of 6-ethyl-1,2,3,4-tetrahydroanthracene-9,10-dione
作者:Vojtěch Fajt、Ladislav Kurc、Libor Červený
DOI:10.1002/kin.20309
日期:2008.5
The rate of hydrogenation of 6-ethyl-1,2,3,4-tetrahydroanthracene-9,10-dione was investigated at 313 K and 0.1 MPa in 20 solvents. A multiple linear regression was used to describe the solventeffect. The regression of the reaction rates was carried out using two five-parameter linear regression models: the Abraham–Kamlet–Taft (AKT) and the Koppel–Palm (KP) model. After the elimination of the insignificant
Process for hydrogenating an alkylated anthraquinone
申请人:FMC Corporation
公开号:EP0158864A2
公开(公告)日:1985-10-23
The invention provides a process to increase the mol ratio of nuclearly hydrogenated working compound to the total working solution for the production of hydrogen peroxide by the cyclic reduction, oxidation, and extraction of an alkylated anthraquinone. The process produces the nuclearly hydrogenated working compound without producing substantial quantities of undesired by-products.