초록 ▼

A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100°to 190°C.

A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100°to 190°C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.

대표청구항 ▼

A process for treating vegetable material essentially comprised of cellulose, lignin and hemicelluloses, comprising the steps of: (a) treating said vegetable material under elevated pressure with a first solution comprising (i) water and acetone in a volume ratio between about 70:30 and 30:70, and (

A process for treating vegetable material essentially comprised of cellulose, lignin and hemicelluloses, comprising the steps of: (a) treating said vegetable material under elevated pressure with a first solution comprising (i) water and acetone in a volume ratio between about 70:30 and 30:70, and (ii) at least one acid, said acid having a concentration, relative to the total volume of said first solution, of between about 0.001 and about 1N, at a temperature between about 170°and about 220°C., such that substantially all of said lignin and said hemicelluloses are dissolved in said first solution and a residue comprising microcrystalline cellulose is formed; (b) separating said residue from said first solution; and (c) after step (b), treating said residue with a second solution comprising (i) water and acetone in a volume ratio between about 70:30 and 30:70, and (ii) at least one acid, said acid having a concentration, relative to the total volume of said first solution, of between about 0.001 and about 1N, at a temperature between about 170°and about 220°C., such that said microcrystalline cellulose is substantially completely hydrolyzed to glucose, said glucose being dissolved in said second solution.