Process for the conversion of a xylan-containing feed

摘要

A xylan-containing feed is contacted, in the first reactor essentially operated at plug flow, with an aqueous solution of an acid at a temperature in the range from equal to or more than 140° C. to equal to or less than 210° C. to produce an intermediate product. Then, the intermediate product is contacted, in the second reactor which comprises a continuously stirred tank reactor, with an aqueous solution of an acid at a temperature in the range from more than 130° C. to equal to or less than 200° C. to produce a final product.

主权项

1. A process for the conversion of a xylan-containing feed comprising:
a) contacting, in a first reactor essentially operated at plug flow, the xylan-containing feed with an aqueous solution of an acid at a temperature in the range from equal to or more than 140° C. to equal to or less than 210° C. under conditions to produce an undercooked intermediate product; and b) contacting, in a second reactor which comprises a continuously stirred tank reactor, the undercooked intermediate product with an aqueous solution of an acid at a temperature in the range from equal to or more than 140° C. to equal to or less than 200° C. having a post-reaction pH in the second reactor in the range from equal to or more than 1.5 to equal to or less than 5.0 and a residence time in the range of equal to or more than 0.5 minute to equal to or less than 2 hours to produce an ideally-cooked final product.