substrate toward enzymatic cleavage. The conversion and release of parent diclofenac from prodrug suspensions in vitro were studied using the rotating dialysis model. The results suggest that it is possible to alter and control dissolution and reconversion behavior of the diclofenac prodrugs, thus making the prodrug approach feasible for local and sustained diclofenac action after joint injection.
Provided is a method of preparing an acrylonitrile dimer, the method including: supplying an acrylonitrile monomer, a phosphorus-based catalyst, an alcohol solvent, and an ionic liquid to a reactor to perform a dimerization reaction to prepare a single-phase dimerization reaction product (S10); supplying a reactor discharge stream including the dimerization reaction product to a first distillation column, separating the alcohol solvent and an unreacted acrylonitrile monomer from an upper discharge stream, and supplying a lower discharge stream including an acrylonitrile dimer, the ionic liquid, and the phosphorus-based catalyst to a second distillation column (S20); and separating an upper discharge stream including the acrylonitrile dimer and separating a lower discharge stream including the ionic liquid and the phosphorus-based catalyst, in the second distillation column (S30).
Segmented reactor for homogeneous regeneration of spent ionic liquid
申请人:Chevron U.S.A. Inc.
公开号:US10005057B1
公开(公告)日:2018-06-26
We provide a segmented reactor for regenerating a spent acidic ionic liquid via a hydrogenation reaction and hydrocracking, comprising: no solid hydrogenation catalyst; a gas inlet on one side for feeding a gas feed comprising a hydrogen; a liquid inlet on an opposite side for feeding a spent acidic ionic liquid; partitions along an axis of the reactor that create segments, wherein each segment functions as a bubble column reactor; and an outlet from which a regenerated acidic ionic liquid flows out of the segmented reactor.
A process, comprising: providing an olefin feed comprising pentenes, butenes, and isopentane; and alkylating the olefin feed with isobutane using an acidic ionic liquid catalyst; wherein less than 5 mol % of C5 olefins in the olefin feed are converted to isopentane, and the alkylate gasoline has defined final boiling points and high RONs. A process comprising: alkylating an olefin feed comprising pentenes and isopentane, with isobutane using an acidic ionic liquid catalyst; wherein less than 5 mol % of C5 olefins in the olefin feed are converted to isopentane; and wherein an n-pentane product yield is low. An alkylate gasoline, comprising less than 0.1 wt % olefins and aromatics, less than 1.8 wt % C12+hydrocarbons, and greater than 60 wt % combined C8 and C9 hydrocarbons, wherein the trimethylpentane in the C8 hydrocarbons and the trimethylhexane in the C9 hydrocarbons are defined.
High viscosity index lubricants by isoalkane alkylation
申请人:Chevron U.S.A. Inc.
公开号:US10093594B2
公开(公告)日:2018-10-09
An isoalkane alkylate base oil and a process to make an isoalkane alkylate base oil having a VI higher than 90, comprising:
a. selecting an isoalkane feed containing at least one isoalkane and an olefin feed containing at least one linear olefin such that a combined carbon number of the isoalkane feed and the olefin feed is from 20 to 60; and
b. alkylating the isoalkane feed with the olefin feed in the presence of an acidic alkylation catalyst under alkylation conditions to make the isoalkane alkylate base oil having the VI higher than 90;
wherein the isoalkane alkylate base oil has a kinematic viscosity at 100° C. from 2 to 30 mm2/s, a pour point less than 0° C., and a bromine index less than 2000 mg Br/100 g.
一种异构烷烃烷基化基础油和一种制造VI值高于90的异构烷烃烷基化基础油的工艺,包括
a. 选择含有至少一种异构烷烃的异构烷烃进料和含有至少一种线性烯烃的烯烃进料,使异构烷烃进料和烯烃进料的碳数总和为 20 至 60;以及
b. 在酸性烷基化催化剂存在下,在烷基化条件下将异构烷烃进料与烯烃进料烷基化,以制备 VI 值高于 90 的异构烷烃烷基化基础油;
其中异构烷烃烷基化基础油在 100 摄氏度时的运动粘度为 2 至 30 mm2/s,倾点低于 0 摄氏度,溴指数低于 2000 mg Br/100 g。