US 8,771,426 B2Granted

Process for recovering sugars from a pretreatment stream of lignocellulosic biomass

AssigneeBeta Renewables S.p.A.

InventorsPiero Ottonello, Simone Ferrero, Paolo Torre, Francesco Cherchi, Danilo Defaveri

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Abstract

The process is for pretreating a lignocellulosic biomass feedstock and comprises: soaking a lignocellulosic biomass feedstock wherein the soaked biomass is present as a mixture with a free liquid and wherein the free liquid comprises at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof, washing the mixture of the soaked biomass and the free liquid, wherein at least a portion of the free liquid containing at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof is separated from the soaked biomass to create a soaked washed biomass and at least one free liquid stream, compressing the soaked biomass to create a released liquid, separating the released liquid from the soaked biomass, and keeping at least a portion of the released liquid separate from any free liquid.

Claims11

Dependent claims

A process for the pretreatment of a lignocellulosic biomass feedstock wherein the process is comprised of

A) soaking a lignocellulosic biomass feedstock wherein the soaked biomass is present as a mixture with a free liquid that is present in a state of matter selected from the group consisting of vapor and liquid states of matter and wherein the free liquid comprises at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof,
B) washing the mixture of the soaked biomass and the free liquid, wherein at least a portion of the free liquid containing at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof is separated from the soaked biomass to create a soaked washed biomass and at least one free liquid stream,
C) compressing the soaked washed biomass at a compression ratio to create a released liquid,
D) separating the released liquid from the soaked washed biomass, and
E) keeping at least a portion of the released liquid separate from any free liquid.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/817,865Filed 29 Sep 2011
Priority: IT TO2010A079229 Sep 2010
Published: US 2013/0146049 A113 Jun 2013
Granted: 8 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

C08B 1/003
Preparatory treatment of cellulose for making derivatives thereof , e.g. pre-treatment, pre-soaking, activation: preparation of cellulose…
D21B 1/02
Fibrous raw materials or their mechanical treatment: pretreatment of the raw materials by chemical or physical means
D21B 1/12
By dividing raw materials into small particles, e.g. fibres: by wet methods, by the use of steam
D21B 1/36
Defibrating by other means: explosive disintegration by sudden pressure reduction

Family

US 2013/0146049 A1Pre-grant publication · published 13 Jun 2013
US 8,771,426 B2This patent

From the US filing history. Foreign family members aren’t listed.

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