反応 #2075682

ord-ea1090981d304838b712f45f945c9318

反応方程式

[Cl-].[Cl-].[Cl-].[Cr+3]
chromium chloride
[Na+].[Na+].[O]=[Cr](=[O])([O-])[O][Cr](=[O])(=[O])[O-]
sodium dichromate
[Na+].[Na+].[O]=[Cr](=[O])([O-])[O][Cr](=[O])(=[O])[O-]
sodium dichromate
O=S(=O)(O)O
sulfuric acid
O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Cr+3]
chromium nitrate
O=P([O-])([O-])[O-].[Cr+3]
chromium phosphate
→
[Na+].[OH-]
caustic soda
O=S(=O)([O-])[O-].O=S(=O)([O-])[O-].O=S(=O)([O-])[O-].[Cr+3].[Cr+3]
chromium sulfate

反応物

[Cl-].[Cl-].[Cl-].[Cr+3]
chromium chloride
[Na+].[Na+].[O]=[Cr](=[O])([O-])[O][Cr](=[O])(=[O])[O-]
sodium dichromate
[Na+].[Na+].[O]=[Cr](=[O])([O-])[O][Cr](=[O])(=[O])[O-]
sodium dichromate
O=S(=O)(O)O
sulfuric acid
O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Cr+3]
chromium nitrate
O=P([O-])([O-])[O-].[Cr+3]
chromium phosphate

試薬

なし

反応条件

詳細条件
See reaction.notes.procedure_details.

実験手順

In a known method for producing a chromium salt, such as chromium nitrate, chromium phosphate, or chromium chloride, ore is subjected to alkali oxidizing roasting to prepare a sodium dichromate solution, sulfuric acid is added to the sodium dichromate solution, which is then subsequently reduced with an organic substance to produce a chromium sulfate solution, caustic soda or soda ash is added thereto to form a precipitate of chromium hydroxide or chromium carbonate, which is subsequently subjected to filtration and water washing, and then nitric acid, phosphoric acid, or hydrochloric acid is added thereto for dissolution. In another known method, chromium ore is reduced in an electric furnace using a carbon reductant to produce high-carbon ferrochromium, the high-carbon ferrochromium is extracted with sulfuric acid, the resulting solution is electrolyzed to obtain metallic chromium, and nitric acid or hydrochloric acid is added to the metallic chromium to produce chromium nitrate or chromium chloride.

出典

DOI: 10.6084/m9.figshare.5104873.v1特許: US07641721B2uspto-grants-2010_01