How is HPA made?
Currently most HPA is produced from aluminum metal using hydrolysis or thermal processes. Yava and other companies around the world have focused their research on improving techniques for producing HPA. Yava’s approach has the potential to employ a variety of alumina containing substrates feedstocks including coal fly ash to manufacture HPA. The proprietary process Yava is employing in its initial plants uses a smelter-grade alumina pre-curser, resulting in lower capital and operating costs.