Sodium silicate from rice husk / hull ash (RHA)
Today, rice is grown and harvested on every continent except Antarctica. The majority of all rice is produced in India, China, Japan, Indonesia, Thailand, Burma, and Bangladesh. Asian farmers' accounts for 92-percent of the world's total rice production. More than 550 million tons of rice is produced annually around the globe.
20 of paddy is husk / hull. 110 million ton of husk is produced per year worldwide. Most of it is used as fuel. On relatively good combustion 80 of husk is consumed. Thus we have 22 million ton rice husk ash (RHA) generated per year.
Rice husk / hull ash (RHA) contains
- Biogenic Amorphous Silica
- Carbon
- Un-burnt rice husk / hull
RHA generated in husk fired boiler poses a solid waste disposal problem. The ash is presently used as land fill.
The simple process involves treating the rice husk / hull ash (RHA) with a solution of alkali at relatively low temperature and low pressure. The silica reacts completely with the alkali solution forming liquid commercial silicate with suspended particles of carbon. The carbon is activated, dried & packed. The liquid commercial silicate is further processed or sold.
Ash Reactor
Advantages of our technology
• Our process is environment-friendly.
• Primary raw material is abundant, economical, and renewable.
• Low production cost per unit.
• Good quality product in all Na2O:SiO2 ratio and concentration.
Use of Sodium Silicate
- Detergent & Soap
- Textile
- Adhesive