Assertion: lignin's group | /r/MadeOf | ethyl acetate propyl acetate
Facets:
Source sentences:
text: The above-described general method of lignin recovery contemplates several more specific versions such as, for example, versions wherein: (1) the demethylated lignin dissolved in the demethylated lignin-containing aqueous solution is demethylated kraft lignin; (2) the polar, partially water immiscible organic solvent is selected from the group consisting of esters such as ethyl acetate propyl acetate, butyl acetate amyl acetate and ketones such as 2-butanone (methyl ethyl ketone), 2-pentanone, 3-pentanone, 2-hexanone and 3-hexanone and like polar, partially water immiscible organic solvents; (3) the demethylated lignin-containing aqueous solution is acidified to a pH of from about 5 to about 2; (4) the separation is carried out in a temperature range of from about 10 to about 80 C and preferably at ambient pressure conditions; (5) the demethylated lignin-containing aqueous solution/organic solvent mixture is acidified to a pH of from about 5 to about 2 by use of an acid selected from the group consisting of a mineral acid such as sulfuric acid, hydrochloric acid and phosphoric acid, as well as by organic carboxylic acids such as oxalic acid, formic acid, acetic acid and lactic acid;
text: The above-described general method of lignin recovery contemplates several more specific versions such as, for example, versions wherein: (1) the demethylated lignin dissolved in the demethylated lignin-containing aqueous solution is demethylated kraft lignin; (2) the polar, partially water immiscible organic solvent is selected from the group consisting of esters such as ethyl acetate propyl acetate, butyl acetate amyl acetate and ketones such as 2-butanone (methyl ethyl ketone), 2-pentanone, 3-pentanone, 2-hexanone and 3-hexanone and like polar, partially water immiscible organic solvents; (3) the demethylated lignin-containing aqueous solution is acidified to a pH of from about 5 to about 2; (4) the separation is carried out in a temperature range of from about 10° to about 80° C. and preferably at ambient pressure conditions; (5) the demethylated lignin-containing aqueous solution/organic solvent mixture is acidified to a pH of from about 5 to about 2 by use of an acid selected from the group consisting of a mineral acid such as sulfuric acid, hydrochloric acid and phosphoric acid, as well as by organic carboxylic acids such as oxalic acid, formic acid, acetic acid and lactic acid;