Explain about extraction of metals, Chemistry

Assignment Help:

Q. Explain about Extraction of metals?

Extraction of metals is very often done by complex formation. For example, the cyanide process for the extraction of silver and gold is well known. Purification of metals is often accomplished by solvent extraction of neutral complexes. Commonly encountered ligands for such purposes are oxine, acac, dmg, salicylaldoxime or salicyldineimines. The role of complexes as catalysts in the production of organic chemicals is yet another field of importance. For example various complexes of copper, silver, mercury, ruthenium, cobalt etc. are known to be good catalysts for hydrogenation process [RhCI (PPh3)3], tris (tripheny1phoshine) chlororhodium(1) is one of the best known and thoroughly  investigated compounds. Similarly, oxidation, polymerisation, hydroformylation of olefins all involve the formation of complexes as intermediates. However, quite often they are not simple complexes rather they are organometallic compounds.


Related Discussions:- Explain about extraction of metals

How many fluorescence photons will really be detected, How many fluorescenc...

How many fluorescence photons will really be detected on average by the photo detector during a 10 ms acquisition window if one diIC12 molecule is located in the illuminated area?

Nodes of the original 2p orbitals, Both of the MOs have the nodes of the or...

Both of the MOs have the nodes of the original 2p orbitals, which merge into a one node because the nodal plane is common to both orbitals. The antibonding MO has in addition a

D block elements, what is the general electronic configuration of d block e...

what is the general electronic configuration of d block element

Basic structure of polymers, Q.Illustrate the Basic structure of polymers? ...

Q.Illustrate the Basic structure of polymers? Ans. Polymers are large organic compounds made of regularly repeating units. Plastics are made of polymers. Polymers ar

Fluid behaviour , A diluted polymer solution with a density of 1130 kg/m3 w...

A diluted polymer solution with a density of 1130 kg/m3 was extruded by a capillary tube of 3.5 mm internal diameter and 1 m long.  The following results were contained at 25°C.

Write a feature of metallic solid from an ionic solid, Write a feature whic...

Write a feature which will distinguish a metallic solid from an ionic solid. a) Explain 'order of a reaction'. b) What is an emulsion?

Homologous, what do you mean by homologous series .

what do you mean by homologous series .

Physical properties of acetophenone - aldehydes and ketones, Physical prope...

Physical properties of Acetophenone - Aldehydes and Ketones a. Acetophenone is a colourless crystalline solid with melting point 20°C and boiling point 202°C. b. Acetophenon

Strengths of phenols - hydrocarbon, Strengths of Phenols - Hydrocarbon ...

Strengths of Phenols - Hydrocarbon The comparative strengths of some phenols (as acids) are like this: p-Nitrophenol > o-Nitrophenol > m- Nitrophenol > Phenol Presence of

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd