Home >
Community >
Why are sodium silicate solution coloured ?
Upvote
28
Downvote
+ Silicate
+ Sodium
+ Color
Posted by
Mel Winchester
Why are sodium silicate solution coloured ?
Autoclaving silica (e.g. quartz) with strong NaOH or KOH solution may cause severe corrosion on some types of steel. Milling quartz sand could perhaps also cause metallic contamination. Transmission visible light spectroscopy may possibly help to identify colouring ion(s). Dark amber colour could, in principle, be considered compatible with combined Fe(III) and Mn(III) contamination (Fe2O3 and Mn2O3).
Autoclaving silica (e.g. quartz) with strong NaOH or KOH solution may cause severe corrosion on some types of steel. Milling quartz sand could perhaps also cause metallic contamination. Transmission visible light spectroscopy may possibly help to identify colouring ion(s). Dark amber colour could, in principle, be considered compatible with combined Fe(III) and Mn(III) contamination (Fe2O3 and Mn2O3).
Thank you for the answer, Sir. Even when you treat rice husk silica after acid leaching with NaOH, the liquor is intense (brown to black) in colour. I wanted to know, the reason for the intense colour. Acid treatment to the basic solution produces white amorphous silica.
Thank you for the answer, Sir. Even when you treat rice husk silica after acid leaching with NaOH, the liquor is intense (brown to black) in colour. I wanted to know, the reason for the intense colour. Acid treatment to the basic solution produces white amorphous silica.
Autoclaving silica (e.g. quartz) with strong NaOH or KOH solution may cause severe corrosion on some types of steel. Milling quartz sand could perhaps also cause metallic contamination. Transmission visible light spectroscopy may possibly help to identify colouring ion(s). Dark amber colour could, in principle, be considered compatible with combined Fe(III) and Mn(III) contamination (Fe2O3 and Mn2O3).
Autoclaving silica (e.g. quartz) with strong NaOH or KOH solution may cause severe corrosion on some types of steel. Milling quartz sand could perhaps also cause metallic contamination. Transmission visible light spectroscopy may possibly help to identify colouring ion(s). Dark amber colour could, in principle, be considered compatible with combined Fe(III) and Mn(III) contamination (Fe2O3 and Mn2O3).
More
VOTE
Thank you for the answer, Sir. Even when you treat rice husk silica after acid leaching with NaOH, the liquor is intense (brown to black) in colour. I wanted to know, the reason for the intense colour. Acid treatment to the basic solution produces white amorphous silica.
Thank you for the answer, Sir. Even when you treat rice husk silica after acid leaching with NaOH, the liquor is intense (brown to black) in colour. I wanted to know, the reason for the intense colour. Acid treatment to the basic solution produces white amorphous silica.
More
VOTE
Perhaps of some interest for your query ― On silica extracted from rice husk: https://www.researchgate.net/post/How_to_make_nano_silica_from_extracted_silica_rice_husk
Perhaps of some interest for your query ― On silica extracted from rice husk: https://www.researchgate.net/post/How_to_make_nano_silica_from_extracted_silica_rice_husk
More
VOTE
That was a useful link
That was a useful link
More
VOTE