Billions of tonnes of this "red mud" sit in holding ponds around the world, an amount that will continue to increase as long as the Bayer process
These include the formation of anionic polyacrylamide through hydrolysis, (17) the synthesis of sulfomethylated derivatives from the reaction of polyacrylamide with formaldehyde and sodium bisulfate, (18) the formation of aminomethylated polyacrylamide from the reaction of polyacrylamide with formaldehyde and dimethylamine (Mannich reaction), (19) and the generation of various derivatives by transamidation reactions including hydroxamated polyacrylamides used as a flocculant in the Bayer process
The available alumina and reactive silica results quoted are unbeneficiated based on low temperature caustic digest analysis (143AC), to simulate extraction by the Bayer process
Orbite ) and Veolia Environmental Services ( Veolia ) signed an exclusive worldwide collaborative agreement for the treatment and recycling of red mud generated by industrial alumina production using the Bayer process
He explained the improved Bayer process
step by step: identified a market problem, formed an economic value proposition and solicited feedback about the value proposition from parties throughout the value chain.
Orbite technologies enable environmentally-neutral extraction of smelter-grade alumina (SGA), high-purity alumina (HPA) and high-value elements, including rare earths and rare metals, from a variety of sources such as aluminous clay and bauxite, without generating the toxic red mud residue that the traditional Bayer process
Stamixco LLC says the Bayer process
also allows the mixers to be made and sold at lower cost.
The Bayer process
uses caustic soda to digest the ore and solubulize the alumina from the bauxite as sodium aluminate.
Life Cycle Assessment of China's Alumina Manufacturing by Bayer Process
The Bayer process
mixes bauxite with caustic soda (otherwise known as lye) in high-pressure digesters at 300 to 480[degree]F.
Orbite s innovative and proprietary process can successfully produce alumina from clay and other feedstocks including red mud, the waste by-product of alumina production from bauxite using the industry-standard Bayer process
In conjunction with the refinery scoping study that is currently underway, Bauxite Resources is reviewing all resources for amenability to higher temperature Bayer Process