US2017073365A1PendingUtilityA1

Preparation of lignin

52
Assignee: ANNIKKI GMBHPriority: Sep 2, 2010Filed: Nov 4, 2016Published: Mar 16, 2017
Est. expirySep 2, 2030(~4.1 yrs left)· nominal 20-yr term from priority
Inventors:Karin FacklerThomas TersOrtwin ErtlKurt Messner
C07G 1/00
52
PatentIndex Score
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Cited by
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References
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Claims

Abstract

A method for the preparation of lignin from lignocellulosic material by pulping with alcohol, in particular with a C 1-4 alcohol, water and a base, in particular NaOH, at a temperature below 100° C., in particular from 40° C. to 90° C., in particular from 50° C. to 70° C., characterized in that 3 to 12 parts of base, in particular 4 to 10 parts of base, in particular preferable 5 to 8 parts of base, are used per 100 parts of the dry lignocellulosic material to be pulped.

Claims

exact text as granted — not AI-modified
1 . A method for the preparation of lignin from lignocellulosic material by pulping with alcohol, at a temperature below 100° C., characterized in that 3 to 12 parts of base, are used per 100 parts of the dry lignocellulosic material to be pulped. 
     
     
         2 . The method according to  claim 1 , characterized in that the ratio of water to alcohol is in a range from 10:90 to 90:10. 
     
     
         3 . The method according to  claim 1 , characterized in that there is used a pulping period of 2 hours to 36 hours. 
     
     
         4 . The method according to  claim 1 , characterized in that there is used as lignocellulosic material straw, energy crops, and/or glumes. 
     
     
         5 . The method according to  claim 18 , characterized in that isopropanol is used as C 1-4  alcohol. 
     
     
         6 . The method according to  claim 18 , characterized in that ethanol is used as C 1-4  alcohol. 
     
     
         7 . The method of  claim 1 , wherein the temperature is between 40° C. to 90° C. 
     
     
         8 . The method of  claim 1 , wherein the temperature is between 50° C. to 70° C. 
     
     
         9 . The method of  claim 1 , wherein 4 to 10 parts of base are used per 100 parts of the dry lignocellulosic material to be pulped. 
     
     
         10 . The method of  claim 1 , wherein 5 to 8 parts of base are used per 100 parts of the dry lignocellulosic material to be pulped. 
     
     
         11 . The method according to  claim 1 , wherein the ratio of water to alcohol is in a range from 20:80 to 40:60. 
     
     
         12 . The method according to  claim 1 , wherein the ratio of water to alcohol is in a range from 60:40 to 90:10. 
     
     
         13 . The method according to  claim 1 , wherein there is used a pulping period of 10 to 24 hours. 
     
     
         14 . The method according to  claim 1 , wherein there is used as lignocellulosic material energy crops. 
     
     
         15 . The method according to  claim 1 , wherein there is used as lignocellulosic material elephant grass. 
     
     
         16 . The method according to  claim 1 , wherein there is used as lignocellulosic material switchgrass. 
     
     
         17 . The method of  claim 1 , wherein the alcohol is a C 1-4  alcohol. 
     
     
         18 . The method according to  claim 4 , wherein the glumes are lemmas. 
     
     
         19 . The method of  claim 1 , wherein the base is NaOH.

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