Formation of sodium silicate from rice hull ash using sodium hydroxidefrom wood ahs

Question

1 what is the proportion of sodium silicate to sodium hydroxide?

2 how long will the reaction take place when heated? (Formation of sodium silicate from rice hull and the formation of NaOH from wood ash)

3 how can i make sure that the NaOH from the wood is is really NaOH?

4 how many wood ash will i use?

5 What is the chemical reaction (please. indicate the chemical equation) bet the wood ash and the water when subjected to heat?

6 What can i produce using the Produced sodium silicate?

web page would be helpful!!?

Pls & TY

Answer 1

Making lye from wood ash

Lye made from wood ash is potassium hydroxide, not sodium hydroxide -- there's 10 times as much potassium as sodium in wood ash.The process makes lye water.

http://journeytoforever.org/biodiesel_as...

Process

The initial step is extraction of silica from ash as sodium silicate

using caustic soda. This reaction is carried out at a temperature

in the range 180o-200oC and pressure ranging from 6-8atmosphere.

http://209.85.175.104/search?q=cache:lU7...

http://cat.inist.fr/?aModele=afficheN&cp...

cgpl.iisc.ernet.in/site/Portals/ 0/Technologies/PrecipitatedSilica.pdf