Abstract in simplified Chinese:于一从包括丙烯和丙烷的混合物中分离出丙烯的方法中,系将该混合物通过一床的吸附剂,该吸附剂包括一多孔型结晶材料,该材料具有(i)在373°K温度和8kPa丙烯分压下测量时为至少0.1 sec-1的丙烯扩散时间常数,及(ii)在373°K温度和8kPa丙烷分层下测量时,为小于0.02该丙烯扩散时间常数之丙烷扩散时间常数。该床可优先地从该混合物吸附丙烯。然后经由降低压力或提高该床的温度而从该床脱吸出所吸附的丙烯。
Abstract in simplified Chinese:一种可用于一氧化碳形成烃混合物之氢化作用的受载触媒或受载触媒先质之活化方法,其包括:在高温下以含氢气体还原,以使至少部分于金属态,在非氧化剂大气下以至少选自铵盐、烷基铵盐和弱有机酸的成员之溶液,可选择地进一步包括氨,浸渍到其已吸附该溶液的体积等于其计算孔隙体积之至少约10%,在浸渍溶液存在下以气体氧化剂氧化;和在高温下以含氢气体还原而形成活性触媒。该等以浸渍开始之步骤可被重复。可选择性地,触媒在氧化步骤之后烧及/或在活化之后钝化。
Abstract in simplified Chinese:提供一种更新用于一氧化碳形成烃混合物的氢化作用之用过的载体上触媒之活性的方法,包括减少触媒之烃含量,在非氧化大气下以至少一种弱有机酸(较佳单-或二-羧酸)之溶液浸渍该触媒,到其已吸收该溶液的体积等于其计算孔隙体积之至少约10%;在浸渍溶液存在下以气体氧化剂氧化触媒;和借由在高温下与氢之还原作用活化触媒。可选择性地,触媒在氧化步骤之后烧,和在活化步骤之后钝化。减少触媒之烃含量的较佳方法为于高温下接触触媒与含氢气体。
Abstract:
Embodiments of the present disclosure generally relate to adhesive compositions, and more particularly, to the use of polyolefin adhesive compositions for hot melt adhesive applications. In an embodiment, a composition includes a polymer, a resin, and an olefin wax. In an embodiment, an olefin wax may be a linear alpha olefin.
Abstract:
Tungstated zirconium catalysts for paraffin isomerization may comprise: a mixed metal oxide that is at least partially crystalline and comprises tungsten, zirconium, and a variable oxidation state metal selected from Fe, Mn, Co, Cu, Ce, Ni, and any combination thereof. The mixed metal oxide comprises about 5 wt. % to about 25 wt. % tungsten, about 40 wt. % to about 70 wt. % zirconium, and about 0.01 wt. % to about 5 wt. % variable oxidation state metal, each based on a total mass of the mixed metal oxide. The mixed metal oxide has a total surface area of about 50 m2/g or greater as measured according to ISO 9277, and at least one of the following: an ammonia uptake of about 0.05 to about 0.3 mmol/g as measured by temperature programmed adsorption/desorption, or a collidine uptake of about 100 μmol/g or greater as measured gravimetrically.
Abstract:
Systems and methods are provided for improving the operation of a divided wall column for performing distillations. The systems and methods include using a separation stage in a fluid flow pathway for transporting an enriched intermediate stream from a first side of a dividing wall to a second side of a dividing wall. By using a separation stage, the benefit of transporting an enriched intermediate stream can be achieved without requiring precise knowledge of the local concentration profile on the first side of the dividing wall.
Abstract:
A hybrid model for predicting corrosion in a system integrates a physics-based model developed using laboratory data and a machine-learning model developed using in-field data. Said hybrid model may be used, for example, in methods by: determining a physics-based measurement of corrosion using a physics-based model for a fluid's corrosion of a substrate based, at least in part on, lab-based measurements; determining a machine learning-based measurement of corrosion using a machine learning-based model for the fluid's corrosion of the substrate based, at least in part on, in-field-based measurements; and applying an ensemble method to the physics-based measurement of corrosion and the machine learning-based measurement of corrosion to yield an estimated measure of corrosion of the substrate. The hybrid model may be applied to corrosion mechanisms that occur in, for example, hydrocarbon transportation systems, hydrocarbon production systems, hydrocarbon refining systems, and alkylation systems.
Abstract:
Catalytic compositions and sequential catalytic methods are generally described. in some embodiments, a composition comprises a first catalyst comprising a Cu-modified zeolite, and a second catalyst capable of a coupling reaction between (a) an intermediate resulting from a reaction of a reactant at the first catalyst, and (b) a co-reagent, wherein a rate of diffusion of the co-reagent within one or more cages and/or pores of the first catalyst is lower than a rate of diffusion of the intermediate within the one or more cages and/or pores of the first catalyst.