Continuous counter-current organosolv processing of lignocellulosic feedstocks
First Claim
1. A modular biorefining process for separating a lignocellulosic feedstock into component parts and further processing of said component parts;
- the modular process comprising;
a first processing module provided with a first series of steps for receiving, physically screening, and physico-chemically fractionating a lignocellulosic feedstock with an organic solvent separately provided thereto thereby extracting component parts therefrom, and separating said component parts into a first liquid fraction and a cellulosic solids fraction comprising a plurality of a first class of lignin derivatives therein;
a second processing module provided with a second series of steps for receiving therein said cellulosic solids fraction and separating therefrom a sugar fraction;
a third processing module provided with a third series of steps comprising;
separating a first solids fraction from the first liquid fraction thereby producing a second liquid fraction, said first solids fraction comprising a plurality of a second class of lignin derivatives;
separating a second solids fraction from the second liquid fraction thereby producing a third liquid fraction, said second solids fraction comprising a plurality of a third class of lignin derivatives;
recovering from the third liquid fraction at least a portion of the organic solvent and a processed third liquid fraction; and
a fourth processing module provided with at least one step for recovery of a first semi-solid waste material therefrom said processed third liquid fraction.
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Accused Products
Abstract
A modular process for organosolv fractionation of lignocellulosic feedstocks into component parts and further processing of said component parts into one or more of a de-lignified cellulose stream, a sugar stream, small-chain alcohol streams and four structurally distinct classes of lignin derivatives. The modular process comprises a first processing module configured for digesting lignocellulosic feedstocks with an organic solvent thereby producing a cellulosic solids fraction and a liquid fraction, a second processing module configured for recovering small-chain alcohols and optionally a first class of lignin derivatives from the cellulosic solids fraction, a third processing module configured for recovering from the liquid fraction at least one of a second class and a third class of lignin derivatives or mixtures thereof, and waste stream comprising a fourth class of lignin derivatives. The fourth processing module may optionally recover the fourth class of lignin derivatives.
19 Citations
62 Claims
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1. A modular biorefining process for separating a lignocellulosic feedstock into component parts and further processing of said component parts;
- the modular process comprising;
a first processing module provided with a first series of steps for receiving, physically screening, and physico-chemically fractionating a lignocellulosic feedstock with an organic solvent separately provided thereto thereby extracting component parts therefrom, and separating said component parts into a first liquid fraction and a cellulosic solids fraction comprising a plurality of a first class of lignin derivatives therein; a second processing module provided with a second series of steps for receiving therein said cellulosic solids fraction and separating therefrom a sugar fraction; a third processing module provided with a third series of steps comprising; separating a first solids fraction from the first liquid fraction thereby producing a second liquid fraction, said first solids fraction comprising a plurality of a second class of lignin derivatives; separating a second solids fraction from the second liquid fraction thereby producing a third liquid fraction, said second solids fraction comprising a plurality of a third class of lignin derivatives; recovering from the third liquid fraction at least a portion of the organic solvent and a processed third liquid fraction; and a fourth processing module provided with at least one step for recovery of a first semi-solid waste material therefrom said processed third liquid fraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- the modular process comprising;
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24. A modular biorefining system for organosolv fractionation of lignocellulosic feedstock into component parts and further processing of said component parts, the modular process comprising:
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a first processing module configured for receiving, physically processing, and physico-chemically fractionating a lignocellulose feedstock by commingling and circulating therethrough an organic solvent separately provided thereto, and separating said component parts into a first liquid fraction and a cellulosic solids fraction comprising therein a plurality of a first class of lignin derivatives; a second processing module configured for receiving and processing therein said cellulosic solids fraction, and recovering therefrom a de-lignified cellulose pulp stream; a third processing module provided with a third series of steps comprising; separating a first solids fraction from the first liquid fraction thereby producing a second liquid fraction, said first solids fraction comprising a plurality of a second class of lignin derivatives; separating a second solids fraction from the second liquid fraction thereby producing a third liquid fraction, said second solids fraction comprising a plurality of a third class of lignin derivatives; recovering from the third liquid fraction at least a portion of the organic solvent and a processed third liquid fraction; and a fourth processing module configured for recovery of a first semi-solid waste material therefrom said processed second liquid fraction. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A modular biorefining system for organosolv fractionation of lignocellulosic feedstock into component parts and further processing of said component parts;
- the modular process comprising;
a first processing module configured for receiving, physically processing, and physico-chemically fractionating a lignocellulose feedstock by commingling and circulating therethrough an organic solvent separately provided thereto, and separating said component parts into a first liquid fraction and a cellulosic solids fraction comprising therein a plurality of a first class of lignin derivatives; a second processing module configured for receiving and processing therein said cellulosic solids fraction, and recovering therefrom a sugar fraction; a third processing module provided with a third series of steps comprising; separating a first solids fraction from the first liquid fraction thereby producing a second liquid fraction, said first solids fraction comprising a plurality of a second class of lignin derivatives; separating a second solids fraction from the second liquid fraction thereby producing a third liquid fraction, said second solids fraction comprising a plurality of a third class of lignin derivatives; recovering from the third liquid fraction at least a portion of the organic solvent and a processed third liquid fraction; and a fourth processing module configured for recovery of a first semi-solid waste material therefrom said processed second liquid fraction. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
- the modular process comprising;
Specification