Abstract: The present invention relates to a method for purifying phosphoric acid from a mixture which comprises organic compounds and water. In particular the present invention relates to a method for purifying phosphoric acid from a pulping slurry, containing or consisting of phosphoric acid, one or more organic compounds and water, comprising or consisting of the following steps: i) providing a mixture containing or consisting of phosphoric acid, one or more substance(s) S having at least one secondary carbon atom attached to an alkoxy group, one or more (further) organic compounds and water, and adjusting (if necessary) the molar ratio of phosphoric acid to the total of one or more substance(s) S, having at least one secondary carbon atom attached to an alkoxy group, in the mixture to be in the range of from 1:0.4 to 1:10, preferably to be in the range of approximately 1:0.6 to 1:4, especially preferably to be approximately 1:0.85 to 1:2, ii) heating the mixture to 25° C.

Abstract: The present invention primarily relates to a preparation comprising or consisting of 40-99.9 wt.-% of lignin, preferably unmodified lignin, 0.1-50 wt.-% of minerals, preferably 0.1-30 wt.-%, 0-25 wt.-% of one or more mono- and oligomeric carbohydrates, preferably 0.1-20 wt.-%, and 0-15 wt.-% of one or more solvents, in particular water, preferably 0.1-4 wt.-%. Furthermore, the present invention relates to a fertilizer comprising or consisting of such a preparation and to the use of such a preparation as fertilizer, as ingredient for a fertilizer or for producing a fertilizer.

Abstract: The present invention primarily relates to a method for isolating lignin, preferably unmodified lignin, from a mixture, in particular a pulping slurry, containing lignin, a cellulose solvent, a cellulose precipitant, minerals and optionally (residual) cellulose and/or hemicellulose and/or hydrolyzation products thereof, comprising or consisting of the following steps: i) removing the cellulose precipitant from the mixture, ii) contacting the mixture with a lignin precipitant, preferably at a temperature below 50° C.

Abstract: The present invention relates to a method for purifying phosphoric acid from a mixture which comprises organic compounds and water. In particular the present invention relates to a method for purifying phosphoric acid from a a pulping slurry, containing or consisting of phosphoric acid, one or more organic compounds and water, comprising or consisting of the following steps: i) providing a mixture containing or consisting of phosphoric acid, one or more substance(s) S having at least one secondary carbon atom attached to an alkoxy group, one or more (further) organic compounds and water, and adjusting (if necessary) the molar ratio of phosphoric acid to the total of one or more substance(s) S, having at least one secondary carbon atom attached to an alkoxy group, in the mixture to be in the range of from 1:0.4 to 1:10, preferably to be in the range of approximately 1:0.6 to 1:4, especially preferably to be approximately 1:0.85 to 1:2, ii) heating the mixture to 25° C.