摘要N-烷基和N,N-二烷基O的新颖合成已经在实验室规模上开发了使用三个氧化系统的二黄原酸二乙酯和伯胺和仲胺生成的乙基硫代氨基甲酸酯,并且已在半工业规模应用了使用次氯酸钠的方法。研究了氧化剂,次氯酸钠,原位生成的过氧乙酸和乙酸锰(II)/氧气体系对产品纯度和收率的影响。将通过这三种方法获得的结果与在硫酸化镍沸石催化剂存在下乙基黄原酸乙酸钠和胺以及乙基黄原酸钠和胺反应得到的结果进行比较。在分离反应中间体并通过傅立叶变换红外光谱测定其结构的基础上,建立了次氯酸钠氧化的反应机理。1 H和13 C NMR以及质谱法。与商业和催化促进的合成方法相比,建议的次氯酸钠和乙酸锰(II)体系具有许多优势,因为它们是新型的生态友好型合成方法。 图形概要
Syntheses of N-alkyl, N,N-dialkyl, and N-(4-substituted phenyl) O-ethyl thioncarbamates: a kinetic study
作者:Milutin M. Milosavljević、Aleksandar D. Marinković、Vlada B. Veljković、Dragan D. Milenković
DOI:10.1007/s00706-011-0596-1
日期:2012.1
AbstractThe kinetics of the syntheses of N-alkyl, N,N-dialkyl, and N-(4-substituted phenyl) O-ethyl thioncarbamates from sodium ethyl xanthogenacetate, ten alkylamines, and eight substituted anilines were studied at 25, 30, 35, and 40 °C. The reactions were found to follow second-order kinetics. The kinetic (Arrhenius) parameters, such as the activation energy and the frequency factor, as well as the
[EN] DYNAMIC POLYMER WITH HYBRID CROSS-LINKED NETWORK AND APPLICATION THEREOF<br/>[FR] POLYMÈRE DYNAMIQUE À RÉSEAU RÉTICULÉ HYBRIDE, ET APPLICATION ASSOCIÉE<br/>[ZH] 具有杂化交联网络的动态聚合物及其应用
HERRERA, M.;RUIZ, V. M.;TAPIA, R.;VALDERRAMA, J.;VEGA, J. C., AN. QUIM. PUBL. REAL SOC. ESP. FIS. Y QUIM., 1980, 76, N 2, 183-186
作者:HERRERA, M.、RUIZ, V. M.、TAPIA, R.、VALDERRAMA, J.、VEGA, J. C.
DOI:——
日期:——
US4729843A
申请人:——
公开号:US4729843A
公开(公告)日:1988-03-08
[EN] THIONOCARBAMATES AND PROCESSES<br/>[FR] THIONOCARBAMATES ET PROCÉDÉS
申请人:TEEBEE HOLDINGS PTY LTD
公开号:WO2013116898A1
公开(公告)日:2013-08-15
Novel thionocarbamate compounds having one or more substituents with five or more carbon atoms have been produced and evaluated as collectors used in froth flotation processes for the recovery of minerals. The amounts of minerals being recovered are greater as compared to the results obtained from using a conventional collector as a standard when using the novel thionocarbamates. Not only is the amount of materials recovered increased, i.e. enhanced yield, but also the novel thionocarbamate collectors have enhanced selectivity by rejecting iron to a greater extent than the standard so that the purity of the mineral being recovered is increased. A method of making the novel thionocarbamates is described using novel xanthates and amines, including novel amines. The advantage of the processes and methods is that the xanthates used to produce the novel thionocarbamates do not need to be pre-treated by being dried, purified, isolated, but rather the xanthates can be used in the form as produced.