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646 条记录 (耗时 0.013 秒)

    Process for digesting lignocellulosic material
    122.
    发明公开
    Process for digesting lignocellulosic material 失效
    Verfahren zum Aufschluss von Lignocelluloses材料。

    公开(公告)号：EP0211558A2

    公开(公告)日：1987-02-25

    申请号：EP86305606.5

    申请日：1986-07-22

    申请人： BIODYNE CHEMICALS, INC.

    发明人： Baierl, Kenneth W., Sr. ,  Young, Raymond A. ,  Young, Timothy R.

    IPC分类号： D21C3/20 ,  D21C9/02 ,  D21C9/10 ,  D21C11/00

    CPC分类号： D21C3/20

    摘要： A process for digesting lignocellulosic material. Lignocellulosic material is introduced into a digestive zone along with a liquid composed of an ester with an organic lignin solvent capable of dissolving lignin, and water. The lignocellulosic material is digested at a temperature of 0°C to 230°C for a period of time sufficient to solubilize the lignin in the ester and the solvent. The process of the invention reduces the amount of water in the digestive zone to inhibit the hydrolysis of the cellulose, accelerate the delignification and provide a more economical chemical recovery system.

    摘要翻译： 一种消化木质纤维素材料的方法。 将木质纤维素材料与由具有能够溶解木质素的有机木质素溶剂和水组成的液体一起引入消化区。 木质纤维素材料在0℃至230℃的温度下消化足以使木质素溶解在酯和溶剂中的时间。 本发明的方法减少了消化区中的水分，以抑制纤维素的水解，加速脱木质素并提供更经济的化学回收系统。

    LIME SLAKER
    123.
    发明授权
    LIME SLAKER 失效
    石灰斯莱克

    公开(公告)号：EP0094967B1

    公开(公告)日：1986-12-30

    申请号：EP83900241

    申请日：1982-11-29

    申请人： CROWN ZELLERBACH CORPORATION

    发明人： LANE, STANLEY, C.

    IPC分类号： C01F11/02 ,  C04B2/08 ,  D21C11/00

    CPC分类号： C04B2/08 ,  C01F11/02

    摘要： An improved lime slaker in which the lime is combined with the slaking liquor in a vertical conduit (18) which extends below the level of the liquor in the slaker vessel (10). The slaking liquor is introduced into the conduit at a high velocity tangential (26) to the interior surface of the conduit to flush the lime into the vessel. The slaker includes a vertical vent pipe (28) that extends through the bottom (14) of the vessel. In a preferred embodiment, the inlet of the vent pipe is surrounded by an entrainment separator (32). Removable covers (24, 36) permit convenient access for inspection and cleaning of the conduit and the vent pipe.

    摘要翻译： 一种改进的石灰消化器，其中石灰与在消化器容器（10）中液面下方延伸的垂直导管（18）中的消化液混合。 消化液以高速与导管内表面切向（26）导入导管，将石灰冲入容器中。 消化器包括延伸穿过容器底部（14）的垂直排气管（28）。 在一个优选实施例中，通气管的入口被夹带分离器（32）包围。 可移动的盖（24,36）允许方便地检查和清洁导管和通气管。

    METHOD AND APPARATUS FOR DETERMINING CARBONATE/SULFIDE CONCENTRATION.
    124.
    发明公开
    METHOD AND APPARATUS FOR DETERMINING CARBONATE/SULFIDE CONCENTRATION. 失效
    的方法和一种用于确定碳酸盐/硫化物浓度。

    公开(公告)号：EP0143844A4

    公开(公告)日：1985-09-26

    申请号：EP84902259

    申请日：1984-05-16

    申请人： WEYERHAEUSER CO

    发明人： SPEAKS JERRY ROBERT ,  WARRICK RONALD PAUL ,  ROZWOD THOMAS GORDON

    IPC分类号： D21C11/00 ,  G01N30/04 ,  G01N30/06 ,  G01N31/00 ,  G01N33/34 ,  G01N33/00

    CPC分类号： G01N33/343 ,  G01N31/00

    摘要： A process and apparatus for measuring carbonate and sulfide concentrations in white and green pulp mill liquor and in the slaker/causticizing cells and controlling the causticizing reaction and other stages using this information. Specifically the causticizing control logic is based on determining the concentration of sodium carbonate and sodium sulfide in the green liquor, in the white liquor-mud slurry at the slaker (S) or first causticizer (C1) and in the white liquor being sent to the digester house and using this information to control the entire process. The apparatus takes a sample from an appropriate line, filters the sample if necessary, takes a measured quantity, reacts that measured quantity with an acid to generate hydrogen sulfide and carbon dioxide and measures the quantities of these gases in a gas chromatograph (GC). The apparatus has four main circuits: the filter circuit, the sampling circuit, the reactor circuit and the gas chromatograph circuit. A mud separation circuit is also utilized if the apparatus is to analyze liquor from the slaker or causticizing cells.

    METHOD AND APPARATUS FOR ANALYZING AND CONTROLLING CARBONATE AND SULFIDE IN GREEN LIQUOR SLAKING AND CAUSTICIZING.
    125.
    发明公开
    METHOD AND APPARATUS FOR ANALYZING AND CONTROLLING CARBONATE AND SULFIDE IN GREEN LIQUOR SLAKING AND CAUSTICIZING. 失效
    方法和设备进行分析和碳酸盐和硫化物的消光控制和苛化绿液。

    公开(公告)号：EP0148207A4

    公开(公告)日：1985-07-30

    申请号：EP84902258

    申请日：1984-05-16

    申请人： WEYERHAEUSER CO

    发明人： SPEAKS JERRY ROBERT ,  MCCALL THOMAS FRANKLIN ,  WARRICK RONALD PAUL ,  ROZWOD THOMAS GORDON

    IPC分类号： D21C11/04 ,  D21C11/00 ,  D21C11/12

    CPC分类号： D21C11/0064

    摘要： A process and apparatus for measuring carbonate and sulfide concentrations in white and green pulping liquor and in the slaker/causticizing (S, C1) cells and controlling the causticizing reaction and other stages using this information. Specifically the causticizing control logic is based on determining the concentration of sodium carbonate and sodium sulfide (GC/A) in the green liquor, in the white liquor-mud slurry at the slaker or first causticizer (ML3) and in the white liquor being sent to the digester house and using this information to control the entire process. Th e concentration and flow rate of the green liquor may be measured and controlled quite easily. The proposed strategy will control the green liquor flow rate (V41) to the slaker to maintain the desired Na2CO3 concentration in the slaker/causticizer liquor despite variations which occur in the lime. The green liquor concentration is also controlled in a control loop. Weak wash liquor (L40) is added to the green liquor to maintain the concentration of the Na2CO3 in the green liquor. The slaking/causticizing process is controlled by adjusting the flow rate and concentration of the green liquor. This strategy will control the process based on direct measurements of the critical component in the system, sodium carbonate. The green liquor flow rate will be automatically adjusted by a control loop to maintain the desired Na2CO3 concentration in the white liquor. The last measurement is to determine the concentrations of sodium hydroxide, sodium carbonate, and sodium sulfide in the white liquor which is sent to the digester house to be used in the cooking process. It is important to measure the sodium hydroxide and sodium sulfide concentrations in the white liquor (RS3, GC/A) so that the amount of liquor to be charged in the digester(s) may be correctly determined. Changes in sodium sulfide concentration (generated at the recovery boiler) can affect white liquor (AA/EA) concentration.

    NANOCELLULOSE COMPOSITIONS AND PRODUCTS
    130.
    发明公开
    NANOCELLULOSE COMPOSITIONS AND PRODUCTS 审中-公开

    公开(公告)号：EP4201963A1

    公开(公告)日：2023-06-28

    申请号：EP22182853.6

    申请日：2013-11-28

    申请人： GranBio Intellectual Property Holdings, LLC

    发明人： RETSINA, Theodora ,  PYLKKANEN, Vesa ,  NELSON, Kimberly ,  O'CONNOR, Ryan

    IPC分类号： C08B15/00 ,  C08B15/08 ,  D21C3/04 ,  D21C5/00 ,  D21C9/00 ,  D21C11/00

    摘要： Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and/or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.