Method for co-pulping waste cellulosic material and wood chips
    1.
    发明授权
    Method for co-pulping waste cellulosic material and wood chips 失效
    共制造废纤维素材料和木屑的方法

    公开(公告)号:US6017415A

    公开(公告)日:2000-01-25

    申请号:US924360

    申请日:1997-09-05

    IPC分类号: D21C3/00 D21C5/02 D21B1/08

    CPC分类号: D21C3/00 D21C5/02 Y02W30/648

    摘要: A method wherein waste cellulosic material is used as an alternative fiber source during chemical pulping to replace a fraction of the wood chips. The waste cellulosic material is fed to the digester along with wood chips. The waste cellulosic material need not be repulped or slurried prior to digestion. The wood chips may be any species of hardwood or softwood. Normal chemical pulping charges, temperatures and cooking times applied in the case of 100% wood chip pulping may be used for the co-pulping of waste cellulosic material and wood chips. Thereafter, the pulp is processed as usual for chemical pulping, including the steps of blowing the digester, washing and thickening the brown stock, and bleaching the brown stock under the normal conditions used for the component co-pulped with the waste cellulosic material. Further screening or cleaning steps may be required to remove debris from waste cellulosic material.

    摘要翻译: 一种在化学制浆期间将废纤维素材料用作替代纤维源以取代一部分木屑的方法。 废弃的纤维素材料与木屑一起进料到蒸煮器。 废纤维素材料在消化之前不需要重新制浆或浆化。 木屑可以是硬木或软木的任何种类。 在100%木屑制浆的情况下应用的正常化学制浆装料,温度和烹饪时间可用于废纤维素材料和木屑的共制浆。 此后,纸浆按常规进行化学制浆处理,包括吹扫蒸煮器,洗涤和增稠棕色坯料,以及在用于与废纤维素材料共同制备的组分的常规条件下漂白棕色坯料的步骤。 可能需要进一步的筛选或清洁步骤以从废弃的纤维素材料中除去碎屑。

    Method for improving brightness and cleanliness of secondary fibers for
paper and paperboard manufacture
    2.
    发明授权
    Method for improving brightness and cleanliness of secondary fibers for paper and paperboard manufacture 失效
    提高纸张和纸板制造的二次纤维的亮度和清洁度的方法

    公开(公告)号:US5665205A

    公开(公告)日:1997-09-09

    申请号:US375026

    申请日:1995-01-19

    摘要: A high level of calcium carbonate filler is added to secondary fiber pulp by in situ attachment to the secondary fibers. The secondary fiber pulp is mixed with an alkaline salt such as calcium oxide or calcium hydroxide and contacted with a reaction gas such as carbon dioxide in a gas-liquid contactor apparatus through efficient mixing in order to precipitate filler material such as calcium carbonate crystal complexes on the secondary fibers. The resulting pulp products have comparable or, in some cases, better brightness, cleanliness, and other sheet properties as compared to filler addition by conventional methods.

    摘要翻译: 通过原位连接到次级纤维,将高水平的碳酸钙填料加入到二级纤维纸浆中。 将二次纤维纸浆与碱性盐如氧化钙或氢氧化钙混合,并通过有效混合与气 - 液接触器装置中的二氧化碳等反应气体接触,以便将诸如碳酸钙晶体络合物的填料沉淀在 二次纤维。 与通过常规方法的填料添加相比,所得到的纸浆产品具有可比性或在某些情况下具有更好的亮度,清洁度和其它片材性质。

    Biorefinery Process for Extraction, Separation and Recovery of Fermentable Saccharides, Other Useful Compounds, and Yield of Improved Lignocellulosic Material from Plant Biomass
    4.
    发明申请
    Biorefinery Process for Extraction, Separation and Recovery of Fermentable Saccharides, Other Useful Compounds, and Yield of Improved Lignocellulosic Material from Plant Biomass 有权
    用于提取,分离和回收可发酵糖,其他有用化合物的生物精炼方法以及来自植物生物量的改良木质纤维素材料的产量

    公开(公告)号:US20140162324A1

    公开(公告)日:2014-06-12

    申请号:US14133798

    申请日:2013-12-19

    IPC分类号: C13K1/02 C10L5/44

    摘要: Non-food plant biomass is subjected hot-water extraction in a pressurized vessel at an elevated temperature up to about 250° C. without addition of reagents, to yield an aqueous extract containing hemicellulosic components and a lignocellulosic residue. The process leaves the lignocellulose substantially intact, but with the hemicellulosic content largely removed. The separated aqueous extract or liquor is concentrated and purified, and long-chain sugars are reduced into monomer saccharides. The lignocellulosic residue may be further processed, to yield a useful fibrous material that is highly resistant to sorption of water. This material may be used for composite materials that resist water degradation, or may be used to produce a higher thermal-yield, water-resistant fuel, or may be used as bioconversion feedstock for producing high-value, lignocellulosic derivatives.

    摘要翻译: 在高达约250℃的升高的温度下,将非食用植物生物质在加压容器中进行热水提取,而不加入试剂,得到含有半纤维素组分和木质纤维素残余物的含水提取物。 该方法使木质纤维素基本上保持完整,但是半纤维素含量被大大地去除。 将分离的水提取物或液体浓缩并纯化,并将长链糖还原成单体糖。 可以进一步处理木质纤维素残余物,以产生对水的吸附具有高度抗性的有用的纤维材料。 该材料可用于抵抗水分降解的复合材料,或可用于产生较高的热产率,耐水燃料,或可用作生产转化原料以生产高价值木质纤维素衍生物。