Selective reductive coupling of nitro aliphatic compounds with aldehydes in hydrogen using gold catalyst
作者:Larisha Cisneros、Pedro Serna、Avelino Corma
DOI:10.1016/s1872-2067(16)62493-2
日期:2016.10
Nitrones were synthesized in good yields directly from nitro aliphatic compounds, aldehydes, and H 2 using highly dispersed gold nanoparticles on titania. The high selectivity for nitrone synthesis contrasts with the platinum supported on carbon and corresponds to an increase from roughly 50% to 90%. The catalytic performance is tuned by precise control of the struc-ture of the active sites, the characteristics
使用高度分散的金纳米粒子在二氧化钛上直接从硝基脂肪族化合物、醛和 H 2 合成了高产率的硝酮。硝酮合成的高选择性与碳负载铂形成对比,对应于从大约 50% 增加到 90%。通过精确控制活性位点的结构、载体的特性和反应条件来调节催化性能。
[EN] QUINONE METHIDE AND AMMONIUM SALT ANTIPOLYMERANT COMPOSITION AND METHOD<br/>[FR] COMPOSITION D'ANTI-POLYMÈRE DE MÉTHIDE DE QUINONE ET DE SEL D'AMMONIUM, ET PROCÉDÉ
申请人:ECOLAB USA INC
公开号:WO2021072181A1
公开(公告)日:2021-04-15
Described are compositions and methods for inhibiting polymerization of a monomer (e.g., styrene) composition a quinone methide polymerization retarder and an ammonium salt. In a mixture, the ammonium salt improves the efficacy of the quinone methide polymerization retarder and provides greater antipolymerant activity. In turn, the mixture reduces or prevents apparatus fouling and improves the purity of monomer streams.
Method of Increasing the Tanning Effect of Self-tanning Substances
申请人:Rudolph Thomas
公开号:US20100034760A1
公开(公告)日:2010-02-11
The invention relates to a method for enhancing the tanning action of at least one self-tanner substance by reducing or eliminating the presence of oxygen.
本发明涉及一种通过减少或消除氧的存在来增强至少一种自身晒黑物质的晒黑作用的方法。
Diamines Having Reduced Color
申请人:Lee John Y.
公开号:US20080315155A1
公开(公告)日:2008-12-25
This invention provides compositions which comprise at least one aromatic secondary diamine having a Gardner color number no more than about 6. The aromatic secondary diamine either is in the form of one benzene ring having two secondary amino groups on the ring, or is in the form of two benzene rings connected by an alkylene bridge and having one secondary amino group on each ring. At least one N,N′-dihydrocarbylhydroxylamine is optionally present in the composition. Processes for producing such compositions are also provided.
PROCESS AND CATALYST SYSTEM FOR POLYDIENE PRODUCTION
申请人:Luo Steven
公开号:US20100216956A1
公开(公告)日:2010-08-26
Compositions and polydiene production processes involving catalyst systems comprising at least one lanthanide-containing compound, at least one alkylating agent, at least one halogen source, and at least one N,N-dihydrocarbylhydroxylamine.