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    • 22. 发明申请
    • PROCESS FOR THE SELECTIVE RECOVERY OF TRANSITION METALS FROM ORGANIC RESIDUES
    • US20210388462A1
    • 2021-12-16
    • US17413068
    • 2019-12-11
    • ENI S.P.A.
    • Stefania GuidettiAlberto Renato Angelis
    • C22B7/00C10G67/04B01D11/04B01D9/00C22B34/22C22B34/34C22B3/26
    • There is a process for the selective recovery of transition metals from an organic stream containing transition metals. The organic stream and possibly a first extractor if solid, are melted up to the liquid state. The extractor consists of an ionic liquid or a mixture of two or more ionic liquids and the ionic liquid contains an ammonium salt as cation and as anion an anion with chelating properties. A melted organic stream and a first extractor, optionally melted, are fed to a first liquid-liquid extraction unit working at a temperature of at least 150° C. where the liquid-liquid extraction is carried out obtaining a liquid mixture containing an ionic liquid, or a mixture of two or more ionic liquids, and metals. After extraction, the liquid mixture is cooled at a temperature between 0° C. and 70° C. and becomes biphasic; then the cooled mixture is sent to a first separation unit, to separate a liquid phase that contains ionic liquids and metals, and a metal-depleted solid phase. After the first separation, the separated metal-depleted solid phase is optionally sent to a washing unit to which a solvent is fed, so as to eliminate the residual ionic liquid by transferring it into the solvent and obtaining a metal-depleted solid phase. Then the separate liquid phase containing ionic liquids and metals is sent into a liquid-liquid precipitation and separation unit, adding a counter-solvent, thereby obtaining a solid phase containing the metals and a liquid stream containing counter-solvent and ionic liquids.
    • 29. 发明授权
    • Process for the extraction of lipids and sugars from algal biomass
    • US10336965B2
    • 2019-07-02
    • US15037225
    • 2014-11-18
    • ENI S.p.A.
    • Felicia MassettiFederico CapuanoRoberto MediciRoberta Miglio
    • C11B1/10C13K1/00C13K13/00C12N1/02C12N1/12
    • Process for the extraction of lipids and sugars from algal biomass, which comprises: —producing an aqueous suspension of algal biomass; —bringing the pH of said aqueous suspension of algal biomass to a value higher than or equal to 10, preferably ranging from 10.2 to 12, obtaining an aqueous suspension of algal biomass at basic pH; —adding at least one anionic flocculant to said aqueous suspension of algal biomass at basic pH obtaining a concentrated algal biomass; —recovering said concentrated algal biomass; —subjecting said concentrated algal biomass to extraction of the lipids obtaining: (i) an organic phase comprising lipids; (ii) a semi-solid phase comprising a residue of said algal biomass; —subjecting said semi-solid phase (ii) to hydrolysis obtaining sugars. The lipids thus obtained can be advantageously used in the production of biodiesel or green diesel which can be used as such, or in a mixture with other fuels for motor vehicles. The sugars thus obtained can be advantageously used as carbon sources in fermentation processes for the production of lipids and also for the production of alcohols (e.g., ethanol, butanol). Said alcohols can be advantageously used as biofuels for motor vehicles or as components that can be added to fuels for motor vehicles.