The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 2021
Filed:
May. 02, 2017
Versalis S.p.a., San Donato Milanese, IT;
Daniele Riva, PrelĂ , IT;
Dario Giordano, Tortona, IT;
Versalis S.p.A, San Donato Milanese, IT;
Abstract
It is disclosed a process for producing a bio-product from a ligno-cellulosic biomass, wherein the ligno-cellulosic biomass, a gas and steam are introduced in a pressurized reactor operated in a continuous manner at conditions to have a vapor head space. In the pressurized reactor, the vapor head space is maintained at a vapor head space temperature and at a pressure which is at least 1 bar greater than a pure steam equilibrium pressure at the vapor head space temperature. The ligno-cellulosic biomass is then refined by rapidly releasing the pressure while discharging the ligno-cellulosic biomass from the pressurized reactor assembly to create a pre-treated ligno-cellulosic biomass, which is then hydrolyzed and converted to the bio-product. Preferably, at least a portion of the gas is air entrapped in the ligno-cellulosic biomass and it is introduced into the pressurized reactor as part of the ligno-cellulosic biomass. In a preferred embodiment, the lignocellulosic biomass is subjected to a soaking step and an aeration step prior to being introduced into the pressurized reactor, without any xylans separation step.