SDIC Xinjiang Luobupo Potash Co. Is the largest SOP producer in the world. "the company (SDIC) has built the world’s largest SOP production facility in Lop Nur, with annual production at 1.3 million tons. " http://www.sinochemsdfy.com/en/xwzx/hyzl/webinfo/2013/07/1373406793126742.htm If AAA Allana Potash can produce 2-3 MT/YEAR of SOP.. I'll let you do the math on that one. http://mcgroup.co.uk/researches/potassium-sulphate