IN2013KO01362AIN1362KO2013AIN2013KO01362AIN 2013KO01362 AIN2013KO01362 AIN 2013KO01362AIN 1362KO2013 AIN1362KO2013 AIN 1362KO2013AIN 2013KO01362 AIN2013KO01362 AIN 2013KO01362A
Authority
IN
India
Prior art keywords
acid
silicon
separation
based compounds
silicon oxide
Prior art date
Application number
Inventor
Kumar Sriramoju Santosh
Suresh A
Kumar Lingam Ravi
Ray Tathagata
Swarup Dash Pratik
Kumar Banerjee Pradip
Original Assignee
Tata Steel Ltd
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Filing date
Publication date
Application filed by Tata Steel LtdfiledCriticalTata Steel Ltd
Priority to IN1362KO2013priorityCriticalpatent/IN2013KO01362A/en
Publication of IN2013KO01362ApublicationCriticalpatent/IN2013KO01362A/en
The present invention relates to a two-stage process for Separation in a coal leaching process Silicon/Aluminum based Compounds from Spent Hydrochloric Acid, in which the solution is heated in a first stage to a temperature of around 80 °C to convert the unstable silicon tetrachloride to silicon oxide, and treating the acid with Sulphuric acid to remove alumina based compounds. The Silicon chloride is converted to silicon oxide/hydroxide by reacting with oxygen present in the water, and wherein the regeneration comprises mixing of acid with Sulphuric acid for alumina separation.