Alkali metal ion source with moderate rate of ion release and methods of forming
a technology of metal ion source and ion release, which is applied in the direction of silicates, applications, calcareous fertilisers, etc., can solve the problems of waste of potassium and other nutrition elements introduced into the soil in the form of highly soluble salts, the optimal soil for growing crops, and the inability to meet the requirements of nutrient requirements of soil fertility, etc., to achieve the effect of safe raising
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[0036]10 g of roughly ground raw material (ground syenite ore with rough irregular crystalline particles with the size2 (Sigma-Aldrich, grade: ≧96.0%≦3.0% calcium carbonate) for 5-10 minutes before addition of water. Distilled water was added to the mixture according to the proportion listed in Table I. The suspension was placed into the chamber of a McCrone Micronising Mill by McCrone Microscope & Accessories of Westmount, Ill., and milled for 30 minutes (weight ratio between the milling elements (agate spheres) and the sample was about 4). After milling, the suspension was transferred to a batch pressure vessel commercially available from Parr Instrument Co., of Moline, Ill. and maintained at a temperature of about 200° C. and pressure of about 225 PSIG for about 24 hours without stirring. After the reaction, a resulting solid phase containing residual liquid was dried overnight at about 110° C. The ultimate compositions of the material are listed as Examples 1, 2 and, 3 in Table ...
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