Cellulose/TiO2 hybrid spherical microbeads were prepared by a one-step phase separation method using a cellulose xanthate aqueous solution and a sodium polyacrylate aqueous solution. Various types of cellulose/ TiO2 hybrid spherical microbeads were obtained by using the several kinds of TiO2 particles. The resulting hybrid spherical microbeads showed respective differences in the distribution o...

The solid beta-cyclodextrin (beta-CyD) complex of O-cinnamyl S-methyl dithiocarbonates (xanthate, 1a), upon heating at 45 degrees C, underwent asymmetric [3,31-sigmatropic rearrangement to give the optically S-(1-phenylallyl) S-methyl dithiocarbonate (2a) with 60% ee. Heating the beta-CyD complex of 2a at 120 degrees C caused extrusion of COS to give cinnamyl methyl sulfide (3a) in high yield. ...

1,4-Diols resulting from the double addition of ArCCLi (Ar = Ph, substituted phenyl, 2-thienyl) to ortho-C6H4(CHO)2 undergo cascades to tetracenes on simple admixture of LiHDMS, CS2 and MeI. Acene formation proceeds by [3,3]-sigmatropic rearrangement of xanthate anions followed by 6π electrocyclisations. The reactions are terminated by E2 or anionic Chugaev-type eliminations. Structural packing...

Tetrathionates have been found in significantly high concentrations recycled process waters from massive sulphide ore processing plants. These polythionates react with xanthate added to flotation pulps thus reducing dosages solution potentially affecting performance. The current study focused on the effect of tetrathionate-xanthate reaction mineral recoveries. Ore dissolution studies confirmed ...

The article presents the results of laboratory studies on ore flotation copper-molybdenum deposits in East Kazakhstan region using a combined reagent. It is required to use new beneficiation methods and reagents increase efficiency minerals improve processing finely disseminated ores. problem can be solved by combination different collectors. objective research recovery copper molybdenum during...

in this study an easy, green, efficient and simple approach is reported for the synthesis of some benzothiazole-, benzimidazole- and benzoxazole-2-thiolderivatives. the proposed approach employs the reaction of corresponding aromatic amine with potassium isopropyl xanthate (z11) in the presence of copper sulfate (cuso4) as a catalyst under conventional heating and ultrasonic irradiation. the ad...

Xanthic acids have long been known to act as reducing agents. Recently, D609, a tricyclodecanol derivative of xanthic acid, has been reported to have anti-apoptotic and anti-inflammatory properties that are attributed to specific inhibition of phosphatidyl choline phospholipase C (PC-PLC). However, because oxidative stress is involved in both of these cellular responses, the possibility that xa...

The major problem with Carlin-type gold deposit flotation is that the high dolomite content in concentrate decreases quality of gold. Further, activation mechanisms involved are still not fully understood. Herein, correlation Fe2+ conversion xanthate adsorption and was investigated to reveal effect embedded pyrite. Flotation tests suggested rather than Fe3+ improved floatability from 20% 45%. C...