2012年2月11日星期六

Are you searching Sodium fluotitanate?

Molecularformula:  Na2Ti 63H2 O
Molecularweight:   258.08
Execute standard: National standard/GB
Apperance: It is a green powder with hygroscopic, soluble in water
Application: The raw material of the electrolytic process manufacture titanium metal.
More about: Sodium fluotitanate
Read more: http://www.fluorides-fluoride.net/Products/198/

2012年2月6日星期一

Are you looking for Potassium Fluoborate?

Application: it is used as a flux in the metal processing, surface treatment, and in the manufacture of aluminum, titanium and boron alloys. It is also used as a component for the fabrication of grinding wheel and abrasive disc to reduce the operating temperature, as a fire retardant for cotton and artificial fiber, and an erodent for the removal of exposed lead circuit board
More about: Potassium Fluoborate
Read more: http://www.fluorides-fluoride.net/Products/216/

2012年2月2日星期四

Ammonium dichromate

Ammonium dichromate is the inorganic compound with the formula (NH4)2Cr2O7. In this compound, as in all chromates and dichromates, chromium is in a +6 oxidation state, commonly known as hexavalent chromium. It is a salt consisting of ammonium ions and dichromate ions.
It has been used in pyrotechnics and in the early days of photography as well as in lithography, as a source of pure nitrogen in the laboratory, and as a catalyst. It is also used as a mordant for dyeing pigments, in the manufacturing of alizarin, chrome alum, leather tanning and oil purification.
Oxidation reactions
Ammonium dichromate is a strong oxidising agent and reacts, often violently, with any reducing agent. The stronger the reducing agent, the more violent the reaction. It has also been used to promote the oxidation of alcohols and thiols.
More about: Ammonium Dichromate
Read more: http://www.chromium-chromium.net/Chromate-series/Ammonium-Dichromate/

How to get Potassium dichromate?a

Potassium dichromate is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications.
Uses
Cleaning: potassium dichromate may be used to prepare "chromic acid", which can be used for cleaning glassware and etching materials.
Construction: It is used as an ingredient in cement in which it retards the setting of the mixture and improves its density and texture.
Ethanol determination: The concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate.
Leather: It is used to tan leather which is used for footwear.
Photography: Potassium dichromate has important uses in photography and in photographic screen printing, where it is used as an oxidizing agent together with a strong mineral acid.
Sulfur dioxide test: Potassium dichromate paper can be used to test for sulfur dioxide, as it turns distinctively from orange to green.
Wood treatment: Potassium dichromate is used to stain certain types of wood by darkening the tannins in the wood.
More about: Potassium Dichromate
Read more: http://www.chromium-chromium.net/Chromate-series/Potassium-Dichromate/

2012年1月30日星期一

Definition of Sodium dichromate


Sodium dichromate is generated on a large scale from ores containing chromium(III) oxides. The ore is fused with a base, typically sodium carbonate, at around 1000 °C in the presence of air (source of oxygen)
Reactions
Dichromate and chromate salts are oxidizing agents. For the tanning of leather, sodium dichromate is first reduced with sulfur dioxide.
In the area of organic synthesis, this compound oxidizes benzylic and allylic C-H bonds to carbonyl derivatives.
Like all hexavalent chromium compounds, sodium dichromate is considered hazardous. It is also a known carcinogen.
Read more: http://www.chromium-chromium.net/Chromate-series/Industrial-Sodium-Dichromate/

2012年1月29日星期日

How to make Chromium Oxalate?

Chromium Oxalate is produced by the reaction of oxalic acid with a chromium salt. Chromium Oxalate is currently only available as a solution.
Chromium Oxalate is a highly specialised product finding use in metal treatment and plating and the pharmaceutical industry.
Read more: http://www.chromium-chromium.net/Chromate-series/Chromic-Oxalate/

2012年1月16日星期一

What is Chromium hydroxide?

Chromium hydroxide (Cr(OH)3) is amphoteric, dissolving in acidic solutions to form [Cr(H2O)6]3+, and in basic solutions to form [Cr(OH)6]3. It is dehydrated by heating to form the green chromium(III) oxide (Cr2O3), which is the stable oxide with a crystal structure identical to that of corundum.
Applications
Chromium hydroxide is used in Metallurgy, Dye and pigment, Wood preservative, Tanning, Refractory material, Catalysts.
chromium compounds were used in dyes and paints and the tanning of leather, these compounds are often found in soil and groundwater at abandoned industrial sites, now needing environmental cleanup and remediation per the treatment of brownfield land.
Read more: http://www.chromium-chromium.net/Chromate-series/Chromic-Hydroxide/