Sustainable Fe–ppm Pd nanoparticle catalysis of Suzuki-Miyaura cross-couplings in water
作者:Sachin Handa、Ye Wang、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1126/science.aac6936
日期:2015.9.4
1087 An iron preparation substantially lowers the quantity of palladium needed to catalyze a common reaction that forms C-C bonds. Most of today’s use of transition metal–catalyzed cross-coupling chemistry relies on expensive quantities of palladium (Pd). Here we report that nanoparticles formed from inexpensive FeCl3 that naturally contains parts-per-million (ppm) levels of Pd can catalyze Suzuki-Miyaura
Block copolymers, synthesis and application as dehydrating and desalting of heavy crudes
申请人:INSTITUTO MEXICANO DEL PETROLEO
公开号:US10167388B2
公开(公告)日:2019-01-01
The present invention is related to formulations consisting of block copolymers α,ω-di-aryl or alkyl sulfonates of poly(ethylene oxide)w-poly(propylene oxide)-poly(ethylene oxide)w of bis-ammonium and block copolymers α,ω-di-amine of poly(ethylene oxide)w-poly(propylene oxide)-poly(ethylene oxide)w, that are effective in the dewatering and desalting crude whose specific gravities are within the range of 14 to 23°API.
Scale-up process of bifunctionalized triblock copolymers with secondary and tertiary amines, with application in dewatering and desalting of heavy crude oils
申请人:INSTITUTO MEXICANO DEL PETROLEO
公开号:US10125226B2
公开(公告)日:2018-11-13
A chemical synthesis process is provided for the functionalization of monodispersed triblock copolymer (POEw-POPy-POEw) with secondary or tertiary amines at a semi-industrial level in glass reactors having a capacity between 1 L and 100 L. The process includes two stages where the first stage uses an alkylsulfonyl or arylsulfonyl chloride to obtain better leaving groups, and the second stage is the nucleophilic substitution with secondary or tertiary amines, to obtain the bifunctionalized triblock copolymers. The main advantage for this process is to reduce the quantity of unitary process done in each stage, the optimization of reaction times, and the stoichiometric relationships.
3-Aryl quinolines are readily synthesized by a novel Friedlander-type reaction with 3-oxo-2,3-diaryl-propionaldehydes and 2-amino arylaldehydes. A preliminary mechanism of this novel one pot, two-step synthesis has been explored with the proofs of isolation of the enaminone intermediate and the eliminated benzoic acid in this reaction. (C) 2011 Elsevier Ltd. All rights reserved.