Process for producing low molecular alkali metal huminates

Details Process for producing low molecular alkali metal huminates Process for producing low molecular alkali metal huminates

C - Chemistry, Metallurgy

07

G

260/1, 167/179,

C07G 99/00 (2009.01) C08H 99/00 (2010.01) A61K 31/19 (2006.01) A61K 35/10 (2006.01)

Patent

CA 1294609

ABSTRACT OF THE DISCLOSURE The present invention relates to the synthetic produc- tion of alkali salts of low molecular humic acids. The produc- tion is carried out In that polyhydric phenols are oxidized in a weakly alkaline aqueous medium at a temperature ranging from 15 to 40°C, whereupon the reaction mixture is adjusted and/or buffered to a pH value in the range of 6.2 to 7.2 and the low molecular alkali huminates are purified by preparative chromato- graphy method, ultrafiltration, ultracentrifugation or electro- dialysis and are separated from undesired by-products.

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