Patent ID: 9079804
Filing Date: 2015-07-14
Classification: C05B,C05F

Abstract:
1. A method for preparing phosphate compounds comprising the steps of: a) activating raw organic matter selected from the group consisting of lignite, leonardite, peat, plant composts, lignosulfonates not containing monovalent cations, and algae, wherein the activation is carried out by reacting: (i) from about 70 wt % to about 98 wt % of an organic or inorganic acid, with (ii) from about 2 wt % to about 30 wt % of said raw organic matter, such that at least 10% of complexing functional groups present in the raw organic matter are freed, and b) reacting: (i) from about 30 wt % to about 50 wt % of a source of insoluble phosphate, with (ii) from about 50 wt % to about 70 wt % of the activated raw organic matter obtained in step a).