A process is disclosed for producing 1-hydrocarbyl mercaptans which comprises reacting a 1-hydrocarbyl halide with an alkali hydrogen sulfide or an ammonium hydrogen sulfide in the presence of a quaternary ammonium halide, which serves as a phase transfer catalyst.
Extraction of Titanium(IV)–Pyrocatechol Violet Complex with Tridodecylethylammonium Bromide
作者:Yoshio Shijo、Tokuo Shimizu、Kaoru Sakai
DOI:10.1246/bcsj.55.3187
日期:1982.10
The extraction equilibria and the fundamental conditions for extracting the titanium(IV)–Pyrocatechol Volet complex anion in a form of an ionic associate with tridodecylethylammonium bromide into carbon tetrachloride is described. The absorption maxima of the extracted complex occurs at 586 nm, the molar absorptivity and the distribution ratio being 5.17×104 dm3 mol−1 cm−1 and 2.82×102. The optimum pH range for the extraction is 5.1–6.4. The composition of the complex is estimated to be Ti(PV)2(R3R′N)2. The extraction constant would be:Kex=\frac[Ti(PV)2(R3R′N)2]0[Ti(PV)22−][R3R′N+]2,logKex obtained is 13.5. The interference of foreign ions is discussed.
VERBESSERTES VERFAHREN ZUR HERSTELLUNG VON UNSYMMETRISCHEN DIALKYLSULFIDEN
申请人:Saltigo GmbH
公开号:EP4065555A1
公开(公告)日:2022-10-05
[EN] IMPROVED PROCESS FOR PREPARING UNSYMMETRICAL DIALKYL SULFIDES<br/>[FR] PROCÉDÉ AMÉLIORÉ DE PRÉPARATION DE SULFURES DE DIALKYLE ASYMÉTRIQUES<br/>[DE] VERBESSERTES VERFAHREN ZUR HERSTELLUNG VON UNSYMMETRISCHEN DIALKYLSULFIDEN
申请人:SALTIGO GMBH
公开号:WO2021105376A1
公开(公告)日:2021-06-03
Die Erfindung betrifft ein verbessertes Verfahren zur Herstellung unsymmetrischen Dialkylsulfiden durch Umsetzung eines Monoalkylsulfides zumindest mit einem Alkylhalogenid in Gegenwart von Base.