Lignin materials containing compositions
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.
1. A preparation comprising:
60-99 wt.-% of unmodified lignin, and
1-20 wt.-% of minerals,
and further comprising:
0.1-2 wt.-% of one or more mono- and oligomeric carbohydrates, and/or
0.1-2 wt.-% of one or more solvents;
wherein the preparation is essentially free of cellulose and hemicellulose.
2. The preparation according to claim 1 , wherein the preparation further comprises one or more components selected from the group consisting of hydrolysation products of cellulose and/or hemicellulose.
3. The preparation according to claim 1 , wherein the preparation comprises a total carbohydrate content of less than 3 wt.-%.
4. The preparation according to claim 1 wherein one, more than one, or all of the minerals is/are selected from the group consisting of salts comprising K t , Na + , Ca 2+ , Mg 2+ , Cl − , PO 4 3− and SO 4 2− .
5. The preparation according to claim 1 , wherein the content of
N is in the range of 0.1-15 wt.-%, and/or
S is in the range of 0.1-5 wt.-%,
based on the total weight of the preparation.
6. A preparation according to claim 1 , wherein the preparation is obtained by a method for isolating lignin from a mixture comprising lignin, a cellulose solvent, a cellulose precipitant, minerals, and optionally cellulose and/or hemicellulose and/or hydrolysation products thereof, comprising the following steps:
i) removing the cellulose precipitant from the mixture,
ii) contacting the mixture with a lignin precipitant to obtain a precipitate,
iii) removing the precipitate obtained in step ii) from the mixture,
iv) optionally washing the precipitate with a lignin precipitant,
v) removing the lignin precipitant from the precipitate,
vi) optionally separating the cellulose solvent and the lignin precipitant from the remaining mixture obtained in step iii)
with the proviso that in case the cellulose precipitant is the same as the lignin precipitant used in step ii) or contains one or more components of the mixture used as lignin precipitant in step ii), step i) is optional only.
7. Fertilizer comprising a preparation according to claim 1 .
8. The preparation according to claim 1 comprising:
0.1-2 wt.-% of one or more solvents.
9. A preparation according to claim 1 comprising:
70-99 wt.-% of lignin,
1-10 wt.-% of minerals,
0.1-2 wt.-% of mono. and oligomeric carbohydrates, and
0.1-0.5 wt.-% of one or more solvents.
10. The preparation according to claim 1 , wherein the preparation comprises xylose.
11. The preparation according to claim 1 , wherein the content of
N is in the range of 0.1-5 wt.-%, and/or
S is in the range of 0.1-3 wt.-%,
based on the total weight of the preparation.
12. The preparation according to claim 1 , wherein the content of
N is in the range of 0.1-3 wt.-%, and/or
S is in the range of 0.1-1 wt.-%,
based on the total weight of the preparation.
13. The preparation according to claim 1 , wherein the one or more solvents comprise water.
14. The preparation according to claim 9 , wherein the one or more solvents comprise water.
15. A preparation according to claim 5 comprising xylose.
16. A preparation according to claim 9 comprising xylose.
17. Fertilizer comprising a preparation according to claim 9 .