xanthate वाक्य
उदाहरण वाक्य
मोबाइल
- From two examples of sodium ethyl xanthate spillage in Australia, one resulted in evacuation of 100 people and hospitalization of 6 workers who were exposed to the fumes.
- In the Leuckart thiophenol reaction the starting material is an aniline through the diazonium salt ( ArN 2 X ) and the xanthate ( ArS ( C = S ) OR)
- In a 6-membered cyclic transition state the hydrogen atom is removed from the carbon atom ? to the xanthate oxygen in a " syn "-elimination.
- As an example, sodium ethyl xanthate may be added as a collector in the selective flotation of galena ( lead sulfide ) to separate it from sphalerite ( zinc sulfide ).
- An expert in radical chemistry, Zard and his group have notably worked on the xanthates, and contributed to the development of the reversible addition " fragmentation chain-transfer polymerization method.
- The xanthate is dissolved in aqueous sodium hydroxide ( typically 2-5 % w / w ) and allowed to depolymerize to a desired extent, indicated by the solution's viscosity.
- Since 1993, sodium ethyl xanthate is classified as a Priority Existing Chemical in Australia, meaning that its manufacture, handling, storage, use or disposal may result in adverse health or environment effects.
- An alcohol may also be converted to a better leaving group ( e . g ., xanthate ), so as to allow a milder " syn "-elimination such as the Chugaev elimination and the Grieco elimination.
- In 1823 while still in the small laboratory at N�rregade he identified a new family of sulfur-containing compounds, calling them xanthates ( xanthus, Greek " yellow " ) on account of the predominantly yellow colour of xanthate salts.
- In 1823 while still in the small laboratory at N�rregade he identified a new family of sulfur-containing compounds, calling them xanthates ( xanthus, Greek " yellow " ) on account of the predominantly yellow colour of xanthate salts.
- Consequently, during high-risk sodium ethyl xanthate handling operations, workers are required by the Australian regulations to be equipped with protective clothing, anti-static gloves, boots and full-face respirators or self-contained breathing apparatus.
- "' Potassium ethyl xanthate "'is an organosulfur compound with the chemical formula CH 3 CH 2 OCS 2 K . It is a pale yellow powder that is used in the mining industry for the separation of ores.
- This defence was successfully used in " Minerals Separation North American Corp . v . Noranda Mines Ltd . ", where a mining company sued another for the use of a patented process using a xanthate frothing flotation method in order to separate minerals from ore.
- In another variation the reagent is the imidazole 1, 1'- thiocarbonyldiimidazole ( TCDI ), for example in the total synthesis of pallescensin B . TCDI is especially good to primary alcohols because there is no resonance stabilization of the xanthate because the nitrogen lonepair is involved in the aromatic sextet.
- अधिक वाक्य: 1 2
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