According to a new report published by Allied Market Research, titled, "World High Purity Alumina (HPA) Market - Opportunities and Forecasts, 2015-2022", the high purity alumina (HPA) market is expected to reach US $4,498 million by 2022, registering a CAGR of 16.7% from 2016 to 2022. 4N high purity alumina segment occupied more than half of the total HPA market in 2015 and is expected to continue this trend throughout the analysis period.