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Patent Agency Ranking
公开(公告)号：WO2020234761A1
公开(公告)日：2020-11-26
申请号：PCT/IB2020/054727
申请日：2020-05-19
Applicant: POLITECNICO DI MILANO
Inventor： MELE, Andrea , CASTIGLIONE, Franca , FERRO, Monica , COLOMBO DUGONI, Greta , DI PIETRO, Maria Enrica , MANNU, Alberto , PANZERI, Walter
Abstract: Process for the treatment of lignocellulosic biomasses with a process solvent selected from a eutectic solvent consisting of a hydrogen bond acceptor and of a hydrogen bond donor, an ionic liquid and a mixture of said eutectic solvent and said ionic liquid, said process comprising the following steps: A. mixing of the biomass with the process solvent and possibly separation of insoluble cellulose residues and/or inorganic material; B. treatment of the process solvent solution with water and lignin separation; C. separation of the hemicellulose from the mixture of process solvent and possibly water, the step C of hemicellulose separation is carried out by adding an organic solvent soluble in the solvent and in water, thus allowing the precipitation of the hemicellulose and its subsequent separation with conventional techniques from the liquid phase comprising process solvent, organic solvent and possibly water.
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公开(公告)号：WO2021234620A1
公开(公告)日：2021-11-25
申请号：PCT/IB2021/054370
申请日：2021-05-20
Applicant: POLITECNICO DI MILANO
Inventor： MELE, Andrea , FERRO, Monica , COLOMBO DUGONI, Greta , DISPENZA, Rosario
Abstract: Process for the treatment of biomass comprising dried and pulverized citrus pulp, said process comprising the following steps: A. mixing the biomass with a process solvent selected from a eutectic solvent comprising a hydrogen bond acceptor and a hydrogen bond donor, an ionic liquid and a mixture of said eutectic solvent and said ionic solvent, and precipitation of cellulose residues; B. separation of the insoluble cellulose residues precipitated in step A; C. separation of the hemicellulose and the pectin from the process solvent; wherein in the aforesaid step C. of the separation of hemicellulose and pectin is performed through the addition of a lower alcohol and water, thus allowing the precipitation of the hemicellulose and the pectin and their subsequent separation with conventional techniques from the liquid phase comprising process solvent, organic solvent and possibly water.
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公开(公告)号：WO2021234621A1
公开(公告)日：2021-11-25
申请号：PCT/IB2021/054371
申请日：2021-05-20
Applicant: POLITECNICO DI MILANO
Inventor： MELE, Andrea , FERRO, Monica , COLOMBO DUGONI, Greta
Abstract: Use as a decalcifying and descaling remover of a composition comprising: a) a first solvent selected from: a1) a eutectic solvent consisting of a hydrogen bond acceptor and of a hydrogen bond donor, a2) an ionic liquid or a3) a mixture of said eutectic solvent and said ionic liquid; optionally associated with a second solvent b) selected from at least a lower alcohol, water or mixtures thereof, wherein in the first eutectic solvent al) the hydrogen bond acceptor and the hydrogen bond donor are halogen-free.
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公开(公告)号：WO2022106982A1
公开(公告)日：2022-05-27
申请号：PCT/IB2021/060561
申请日：2021-11-15
Applicant: POLITECNICO DI MILANO
Inventor： MELE, Andrea , FERRO, Monica , COLOMBO DUGONI, Greta
Abstract: Process for the treatment of lignocellulosic biomass with a process solvent selected from a eutectic solvent, an ionic liquid and/or a mixture of said eutectic solvent and said ionic liquid, comprising the following steps or stages: A. Mixing the biomass with said process solvent and filtering the solid precipitate consisting of insoluble cellulosic residues; B. Treating the process solvent mixture containing lignin and hemicellulose with water, precipitation of the lignin and separation of the latter; C. Separating the hemicellulose from the process solvent; wherein • in step A, water is added to said process solvent in weight ratios with respect to the process solvent between 80:20 and 20:80; • in step B, water is added in amounts between 10 and 25 times the initial amount of DBS added in step A, to precipitate the lignin, which is filtered, and the process comprises a stage D in which the water is removed from the filtrate by evaporation at pressures between 5 and 15 mbar, preferably 10 mbar; step C of separating the hemicellulose is carried out by addition of an organic solvent soluble in the process solvent mixture, thereby allowing the precipitation of the hemicellulose and the subsequent separation thereof by conventional techniques from the liquid phase consisting of the process solvent and the organic solvent.
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公开(公告)号：WO2021059119A1
公开(公告)日：2021-04-01
申请号：PCT/IB2020/058819
申请日：2020-09-22
Applicant: POLITECNICO DI MILANO
Inventor： MELE, Andrea , FERRO, Monica , COLOMBO DUGONI, Greta
Abstract: Process for the treatment of biomass comprising chitin with a process solvent selected from a eutectic solvent consisting of a hydrogen bond acceptor and a hydrogen bond donor, an ionic liquid and/or a mixture of said eutectic solvent and said ionic liquid, said process comprising the following steps: A. mixing the biomass with the process solvent; B. separating the chitin precipitated in step A. from the remainder of the mixture; wherein: i. the hydrogen bond acceptor is a choline salt with a C2-C6 organic acid, and containing at least one carboxyl group and optionally substituted in the alkyl chain with at least one hydroxyl group, ii. the hydrogen bond donor is an organic acid selected from: glycolic acid, diglycolic acid, levulinic acid, or is imidazole; provided that when choline glycolate is used as a hydrogen bond acceptor, the hydrogen bond donor must be different from glycolic acid; iii. in step A. a polar protic solvent soluble in both said process solvent and water is added to the process solvent; selected from a linear or branched C1-C6 aliphatic alcohol; iv. the ionic liquid is the salt resulting from the exchange reaction between one of the organic acids used as a hydrogen bond donor listed above in point ii. and a choline salt specified in i. used as a hydrogen bond acceptor.
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