Organisches Düngemittel und Verfahren zu seiner Herstellung

摘要

PCT No. PCT/DE94/00310 Sec. 371 Date Feb. 16, 1996 Sec. 102(e) Date Feb. 16, 1996 PCT Filed Mar. 18, 1994 PCT Pub. No. WO94/21576 PCT Pub. Date Sep. 29, 1994The invention concerns a high-grade, long-duration, organic fertilizer and a method of manufacturing it by the oxidative ammonolysis of industrial lignin. The fertilizer contains nitrogen in the form of ammonium compounds, normally hydrolyzable amides and more strongly bound organic nitrogen. The proportion of more strongly bound organic nitrogen is 55 to 85%, preferably 65 to 80%, relative to the total nitrogen content of the fertilizer. The manufacturing process uses industrial lignin precipitated under alkaline conditions from alkaline waste liquors, extracts or solutions. Preliminary tests have confirmed that this process gives a natural-like, high-grade, long-duration fertilizer similar to humus in character and with surprisingly good environmental compatibility.