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    SYSTEMS AND METHODS FOR DEWATERING AND DRYING NANOCELLULOSE
    12.
    发明申请
    SYSTEMS AND METHODS FOR DEWATERING AND DRYING NANOCELLULOSE 有权

    公开(公告)号：US20220127788A1

    公开(公告)日：2022-04-28

    申请号：US17423148

    申请日：2020-03-22

    申请人： GranBio Intellectual Property Holdings, LLC

    发明人： Kimberly NELSON

    IPC分类号： D21C9/18

    摘要： The present invention allows the production of nanocellulose in dry form, enabling incorporation into a wide variety of end-use applications. Some variations provide a nanocellulose-slurry dewatering system comprising: a nanocellulose slurry feed sub-system; a pre-concentration unit (e.g., a centrifuge) to remove at least a portion of the water from the nanocellulose slurry; an inlet for a dispersion/drying agent; a twin-screw extruder in flow communication with the nanocellulose slurry feed sub-system, wherein the twin-screw extruder intimately mixes the nanocellulose slurry and the dispersion/drying agent, wherein the twin-screw extruder shears the nanocellulose slurry, and wherein the twin-screw extruder is configured with one or more extruder vents to remove water from the nanocellulose slurry; and an extruder outlet for recovering a nanocellulose-dispersion concentrate. A milling device may be employed to generate a fine powder of the nanocellulose-dispersion concentrate. Methods of making and using the dewatered or dried nanocellulose are also described.

    Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
    13.
    发明授权
    Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products 有权

    公开(公告)号：US11254957B2

    公开(公告)日：2022-02-22

    申请号：US16782241

    申请日：2020-02-05

    申请人： GranBio Intellectual Property Holdings, LLC

    发明人： Theodora Retsina ,  Vesa Pylkkanen ,  Steven R. Rutherford ,  Jean-Pierre Monclin

    IPC分类号： C12P7/14 ,  D21C3/00 ,  D21C1/02 ,  D21C9/00

    摘要： A low-cost process is provided to render lignocellulosic biomass accessible to cellulase enzymes, to produce fermentable sugars. Some variations provide a process to produce ethanol from lignocellulosic biomass (such as sugarcane bagasse or corn stover), comprising introducing a lignocellulosic biomass feedstock to a single-stage digestor; exposing the feedstock to a reaction solution comprising steam or liquid hot water within the digestor, to solubilize the hemicellulose in a liquid phase and to provide a cellulose-rich solid phase; refining the cellulose-rich solid phase, together with the liquid phase, in a mechanical refiner, thereby providing a mixture of refined cellulose-rich solids and the liquid phase; enzymatically hydrolyzing the mixture in a hydrolysis reactor with cellulase enzymes, to generate fermentable sugars; and fermenting the fermentable sugars to produce ethanol. Many alternative process configurations are described. The disclosed processes may be employed for other fermentation products.

    NANOCELLULOSE COMPOSITIONS AND PROCESSES TO PRODUCE SAME
    17.
    发明申请
    NANOCELLULOSE COMPOSITIONS AND PROCESSES TO PRODUCE SAME 有权

    公开(公告)号：US20210284756A1

    公开(公告)日：2021-09-16

    申请号：US17163768

    申请日：2021-02-01

    申请人： GranBio Intellectual Property Holdings, LLC

    发明人： Theodora RETSINA ,  Kimberly NELSON

    IPC分类号： C08B15/02 ,  C08B15/00 ,  C08B15/04 ,  C08B15/08 ,  C08L1/02 ,  C08J7/12 ,  C08K9/00 ,  C09D101/04

    摘要： A composition comprising nanocellulose is disclosed, wherein the nanocellulose contains very low or essentially no sulfur content. The nanocellulose may be in the form of cellulose nanocrystals, cellulose nanofibrils, or both. The nanocellulose is characterized by a crystallinity of at least 80%, an onset of thermal decomposition of 300° F. or higher, and a low light transmittance over the range 400-700 nm. Other variations provide a composition comprising lignin-coated hydrophobic nanocellulose, wherein the nanocellulose contains very low or essentially no sulfur content. Some variations provide a composition comprising nanocellulose, wherein the nanocellulose contains about 0.1 wt % equivalent sulfur content, or less, as SO4 groups chemically or physically bound to the nanocellulose. In some embodiments, the nanocellulose contains essentially no hydrogen atoms (apart from hydrogen structurally contained in nanocellulose itself) bound to the nanocellulose. Various compositions, materials, and products may incorporate the nanocellulose compositions disclosed herein.

    PROCESSES FOR PRODUCING HIGH-VISCOSITY COMPOUNDS AS RHEOLOGY MODIFIERS, AND COMPOSITIONS PRODUCED THEREFROM
    18.
    发明申请
    PROCESSES FOR PRODUCING HIGH-VISCOSITY COMPOUNDS AS RHEOLOGY MODIFIERS, AND COMPOSITIONS PRODUCED THEREFROM 有权

    公开(公告)号：US20210222044A1

    公开(公告)日：2021-07-22

    申请号：US17160846

    申请日：2021-01-28

    申请人： GranBio Intellectual Property Holdings, LLC

    发明人： Jean-Pierre MONCLIN ,  Hisako KUREBAYASHI

    IPC分类号： C09K8/035 ,  C08H8/00 ,  C09K8/68 ,  C09K8/90 ,  C08B37/00 ,  C04B28/02 ,  C08B15/00 ,  C09K8/62

    摘要： A process is provided for producing a biomass-derived rheology modifier, comprising: providing a pretreated feedstock comprising cellulose-rich solids; refining the cellulose-rich solids in a first high-intensity refining unit, generating refined cellulose solids; gelling the refined cellulose solids in a second high-intensity refining unit, thereby generating gelled cellulose solids; and homogenizing the gelled cellulose solids in a high-shear homogenizer, thereby generating a biomass-derived rheology modifier. The pretreated feedstock may include kraft pulp, sulfite pulp, AVAP® pulp, soda pulp, mechanical pulp, thermomechanical pulp, and/or chemimechanical pulp, derived from wood or lignocellulosic biomass. The pretreated feedstock may be GP3+® pulp, obtained from steam or hot-water extraction of lignocellulosic biomass. These rheology modifiers may be utilized in a wide variety of applications, including water-based or oil-based hydraulic fracturing fluid formulations, as gelling agents. These rheology modifiers are biodegradable, and their production does not directly involve chemicals other than biomass and water.