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中国的盐湖钾盐资源短缺，导致钾盐消费的对外依存度达50%以上，严重制约农业发展，威胁粮食生产安全。而正长岩型钾资源丰富，K2O品位达8.5%~15.4%，预测资源潜力（K2O）达盐湖钾盐储量的20倍以上。此类矿石钾资源的主要富钾矿物为微斜长石、霞石和白云母，地理上主要分布于中国东部的“秦岭大别正长岩带”和“燕辽阴山正长岩带”。采用电解质溶液热力学软件OLI Analyzer 9.2，对KAlSi3O8–NaOH/KOH/Ca(OH)2–H2O体系相平衡进行模拟，继而对代表性富钾正长岩进行水热碱法分解反应实验，证实K2O溶出率高达85.6%以上。所得硅酸钠钾碱液适于加工多种钾盐或生态型钾肥产品，硅铝组分同时转化为沉淀硅酸钙、钠型/钾型沸石、硅灰石、高岭土等多种工业产品。水热碱法技术的加工过程清洁高效，资源利用率高，环境相容性良好，可为发展绿色可持续的中国钾盐工业新体系提供良好的技术基础。
China’s shortage of salt and potash resources, resulting in dependence on foreign consumption of potash salt more than 50%, seriously restricting the development of agriculture, threatening the safety of food production. The syenite type of potash is rich in resources with a K2O grade of 8.5% -15.4%. It is predicted that the resource potential (K2O) will reach more than 20 times of that of the salt lake. The main potassium-rich minerals of this kind of ore are potassium plagioclase, nepheline and muscovite. Geographically, there are “Qinling Dabie Zhengzhang Belt” and “Yanliao Yinshanzhengzheng Belt” located in eastern China. The phase equilibrium of KAlSi3O8-NaOH / KOH / Ca (OH) 2-H2O system was simulated by using OLI Analyzer 9.2, an electrolyte solution thermodynamics software. Then hydrothermal alkali decomposition reaction of representative potassium- Rate up to 85.6%. The resulting sodium potassium silicate lye is suitable for processing a variety of potash or eco-potash products, and the aluminosilicate components are simultaneously converted to various industrial products such as precipitated calcium silicate, sodium / potassium type zeolites, wollastonite and kaolin. The process of hydrothermal alkali technology is clean and efficient, has high resource utilization and good environmental compatibility, and can provide a good technical basis for developing a green and sustainable new system of China’s potash industry.