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    Lignosulfonate of a certain quality and method of preparation of lignosulfonate of a certain quality
    1.
    发明授权
    Lignosulfonate of a certain quality and method of preparation of lignosulfonate of a certain quality 有权
    木质素磺酸盐具有一定的质量和一定质量的木质素磺酸盐的制备方法

    公开(公告)号：US09447131B2

    公开(公告)日：2016-09-20

    申请号：US13516258

    申请日：2010-12-15

    申请人： Bengt Joensson ,  Hans Grundberg ,  Alf Gustafsson

    发明人： Bengt Joensson ,  Hans Grundberg ,  Alf Gustafsson

    IPC分类号： B01D61/14 ,  B01D61/58 ,  D21C11/00 ,  D21H21/18 ,  D21D5/00 ,  C07G1/00 ,  D21C11/02 ,  D21C7/08

    CPC分类号： C07G1/00 ,  B01D61/142 ,  B01D61/58 ,  D21C7/08 ,  D21C11/02 ,  D21H21/18

    摘要： There is provided a process for improving the quality of lignosulfonate at least partly derived form a spent sulfite cooking liquor in at least two steps, comprising: one step in which a lignosulfonate-containing fraction at least partly derived from the spent sulfite cooking liquor is subjected to filtration using a membrane having a cut-off of 40-150 kD (high cut-off) at the pressure, flow rate and temperature of the step and the permeate is recovered; and another step in which a lignosulfonate-containing fraction at least partly derived from the spent sulfite cooking liquor is subjected to filtration using a membrane having a cut-off of 1-20 kD (low cut-off) at the pressure, flow rate and temperature of the step and the retentate is recovered. Products, uses thereof as well as a system are also provided.

    摘要翻译： 提供了一种至少部分地从至少部分得到的亚硫酸盐蒸煮液形成的木素磺酸盐的质量至少两个步骤的方法，其包括：一个步骤，其中至少部分地从废亚硫酸盐蒸煮液中得到的含木素磺酸盐的馏分经受 使用截止值为40-150kD（高截止值）的膜在阶段和渗透物的压力，流速和温度下进行过滤; 并且在压力，流速下使用截止值为1-20kD（低截止值）的膜对使用至少部分地从废亚硫酸盐蒸煮液中得到的含木素磺酸盐的馏分进行过滤的另一步骤和 回收步骤和滞留物的温度。 还提供了产品，其用途以及系统。

    Method for clarifying green liquor by monitoring the calcium concentration in the spent liquor prior to or at combustions
    5.
    发明授权
    Method for clarifying green liquor by monitoring the calcium concentration in the spent liquor prior to or at combustions 失效
    通过在燃烧之前或燃烧期间监测废液中的钙浓度来澄清绿液的方法

    公开(公告)号：US5628875A

    公开(公告)日：1997-05-13

    申请号：US446852

    申请日：1995-06-05

    申请人： Jan G. Liden ,  Leif I. Andersson

    发明人： Jan G. Liden ,  Leif I. Andersson

    IPC分类号： D21C11/00 ,  D21C11/02 ,  D21C11/04

    CPC分类号： D21C11/0064 ,  D21C11/0085 ,  Y02P40/44 ,  Y10S423/03

    摘要： When producing green liquor for later manufacture of cooking liquor, it is endeavoured that the green liquor shall be readily clarified and/or readily filtered. This endeavour is achieved with the present invention, which relates to a method of producing green liquor in which waste liquor separated from cellulose pulp and derived from a cooking stage and possibly from one or more bleaching stages is worked up including known treatment stages such as evaporation, combustion, smelt dissolving and other green liquor preparation, and in which a calcium containing chemical is added to the waste liquor prior to combustion, or is added at the combustion of the waste liquor. The method is characterized in that carbon deriving from the smelt is caused to equal at most 0.3 weight promillage, calculated on the smelt after combustion, when and after dissolving the smelt in liquid; and in that the addition of calcium is controlled so that the amount of calcium added together with the amount of calcium that is already present will equal at least 3/4 of the amount of magnesium present in the waste liquor calculated in mol; and in that the addition is at most 10% by weight of the sodium plus sulphur present in the waste liquor.

    摘要翻译： PCT No.PCT / SE93 / 01028 Sec。 371日期：1995年6月5日 102（e）日期1995年6月5日PCT提交1993年11月29日PCT公布。 第WO94 / 12723号公报 日期1994年6月9日当生产用于以后制造蒸煮液的绿液时，尝试将绿液容易地澄清和/或容易地过滤。 本发明涉及生产绿液的方法，本发明涉及一种生产绿液的方法，其中从纤维素浆中分离并衍生自烹饪阶段并可能来自一个或多个漂白阶段的废液包括已知的处理阶段如蒸发 ，燃烧，熔炼溶解等绿液制备，其中将含钙化学品加入到废液中，或者在燃烧时加入废液中。 该方法的特征在于，使得从冶炼得到的碳达到等于0.3重量％以上，根据燃烧后的熔体计算，熔体溶解在液体中时和之后计算; 并且控制钙的添加使得加入的钙的量与已经存在的钙的量一起等于废液中存在的镁的至少+ E，fra 3/4 + EE 以摩尔计 并且添加量为废液中存在的钠加硫的至多10重量％。

    Process for maintaining a low sodium chloride content in recycled sodium chemicals of sodium-based pulp manufacturing processes
    6.
    发明授权
    Process for maintaining a low sodium chloride content in recycled sodium chemicals of sodium-based pulp manufacturing processes 失效
    在钠基纸浆制造工艺的回收钠化学品中维持低氯化钠含量的方法

    公开(公告)号：US4253911A

    公开(公告)日：1981-03-03

    申请号：US771705

    申请日：1977-02-24

    申请人： Per A. R. Hillstrom ,  Kent I. Sondell

    发明人： Per A. R. Hillstrom ,  Kent I. Sondell

    IPC分类号： D21C11/00 ,  D21C11/02 ,  D21C11/04

    CPC分类号： D21C11/0071 ,  Y10S162/08 ,  Y10S423/03

    摘要： A process is provided for the separation of sodium chloride in the sodium chemicals recovery stage of sodium-based pulp manufacturing processes so as to maintain a low sodium chloride content in the recycled sodium chemicals, comprising the steps of treating an aqueous sodium chloride-containing solution with carbon dioxide gas, thereby forming a saturated sodium bicarbonate solution; precipitating sodium values of the solution as sodium bicarbonate while retaining sodium chloride in solution; separating such sodium bicarbonate; withdrawing the residual aqueous sodium chloride-containing solution from the process; and recycling the separated sodium bicarbonate.

    摘要翻译： 提供了一种用于在钠基纸浆制造方法的钠化学品回收阶段中分离氯化钠以便在再循环的钠化学品中保持低氯化钠含量的方法，包括以下步骤：将含氯化钠水溶液 用二氧化碳气体，从而形成饱和碳酸氢钠溶液; 将溶液中的钠值沉淀为碳酸氢钠，同时将氯化钠保持在溶液中; 分离此类碳酸氢钠; 从该方法中取出残留的含氯化钠水溶液; 并回收分离的碳酸氢钠。

    Process for reducing the amount of calcium contained in sodium-base waste sulfite liquor by the use of a sodium and/or an ammonium compound and additional calcium
    7.
    发明授权
    Process for reducing the amount of calcium contained in sodium-base waste sulfite liquor by the use of a sodium and/or an ammonium compound and additional calcium 失效
    通过使用钠和/或铵化合物和另外的钙来减少钠碱废硫酸盐液中所含的钙的量的方法

    公开(公告)号：US3873415A

    公开(公告)日：1975-03-25

    申请号：US35671673

    申请日：1973-05-03

    申请人： SPRING CHEMICALS LTD

    发明人： SETHI BAL KRISHAN ,  LAHTVEE TOIVO ,  STARK WILLIAM HUBBARD

    IPC分类号： D21C11/02

    CPC分类号： D21C11/02

    摘要： The amount of calcium contained in sodium-base waste sulfite liquor is reduced by precipitating the calcium as calcium sulfite and separating the precipitate from the remaining waste sulfite liquor solution. The precipitation is caused by dissolving in the waste suflite liquor (1) additional calcium, i.e., beyond the amount of calcium initially contained in the waste sulfite liquor; (2) a sodium or an ammonium compound or a combination thereof selected from the group consisting of sodium oxide, sodium sulfite, sodium carbonate, sodium bisulfite, sodium hydroxide, anhydrous ammonia, ammonium sulfite, aqueous ammonia, ammonium carbonate, ammonium magnesium carbonate and ammonium hydroxide; and (3) a source of sulfite ions.

    摘要翻译： 通过使钙作为亚硫酸钙​​沉淀并将沉淀物与剩余的亚硫酸亚铁溶液分离，钠碱性废硫酸亚铁液中所含的钙的量被减少。 沉淀是通过将废铁酸盐溶液（1）溶解在另外的钙中，即超过最初包含在废亚硫酸盐液中的钙的量引起的; （2）选自氧化钠，亚硫酸钠，碳酸钠，亚硫酸氢钠，氢氧化钠，无水氨，亚硫酸铵，氨水，碳酸铵，碳酸铵铵的碳酸钠或铵化合物或其组合，和 氢氧化铵; 和（3）亚硫酸根离子源。

    Process for treating waste sulfite liquor
    9.
    发明授权
    Process for treating waste sulfite liquor 失效
    处理废液的方法

    公开(公告)号：US3819802A

    公开(公告)日：1974-06-25

    申请号：US19447871

    申请日：1971-11-01

    申请人： SPRING CHEMICALS LTD

    发明人： ROBINSON M

    IPC分类号： C01F5/42 ,  C01F11/48 ,  C02F1/52 ,  C02F1/66 ,  D21C11/02 ,  D21C11/00

    CPC分类号： C02F1/5236 ,  C01F5/42 ,  C01F11/48 ,  C02F1/66 ,  D21C11/02

    摘要： THE AMOUNT OF CALCIUM CONTAINED IN WASTE SULFITE LIQUOR IS REDUCED BY PRECIPITATING THE CALCIUM AS CALCIUM SULFITE AND SEPARATING THE PRECIPITATE FROM THE REMAINING WASTE SULFITE LIQUOR SOLUTION. THE PRECIPITATION IS CAUSED BY DISSOLVING A SULFITE-ION-FORMING COMPOUND SUCH AS SULFUR DIOXIDE AND A BASIC MATERIAL SUCH AS AMMONIUM HYDROXIDE IN THE WASTE SULFITE LIQUOR. THE SULFITE-ION-FORMING COMPOUND IS DISSOLVED IN THE WASTE SULFITE LIQOUR IN AN AMOUNT GREATER THAN THAT NEEDED TO PROVIDE THEREIN A SUBSTANTIALLY EQUIMOLAR RATIO OF SO2 TO CAO. THE AMOUNT OF BASIC MATERIAL DISSOLVED IS SUCH THAT SUBSEQUENT TO THE DISSOLUTION OF THE SULFITE-ION-FORMING COMPOUND AND THE BASIC MATERIAL THE PH OF THE WASTE SULFITE LIQUOR IS AT LEAST 5.0. IN ADDITION, THE BASIC MATERIAL MUST BE ONE WHICH IS CAPABLE OF BEING DISSOLVED IN THE WASTE SULFITE LIQUOR BY THE SULFITE-ION-FORMING COMPOUND AND MUST HAVE A CATION SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM, AMMONIUM AND SODIUM.

    Coking of spent pulping liquors with subsequent so{11 {11 absorption
    10.
    发明授权
    Coking of spent pulping liquors with subsequent so{11 {11 absorption 失效
    随着时间的推移，随着时间的推移，

    公开(公告)号：US3770574A

    公开(公告)日：1973-11-06

    申请号：US3770574D

    申请日：1969-11-12

    申请人： TEXACO INC

    发明人： HESS H ,  COLE E

    IPC分类号： C02F1/02 ,  C02F11/18 ,  D21C11/02 ,  D21C11/14

    CPC分类号： C02F1/025 ,  C02F11/18 ,  Y10S423/03

    摘要： Spent Sulfite liquor from a sulfite mill digester is preheated and then heated in a closed system at a temperature in the range of 450* to 700*F under autogenous pressure for a period of 0.5 minutes to six hours to form an effluent liquid and a sulfurcontaining coke. The coke is burned to furnish steam for the process and flue gas from which the SO2 evolved is absorbed by the effluent liquid thus forming additional cooking liquor which is recycled to the digester. Volatile gases from the digester are also oxidized to SO2 which is combined with that formed by burning the coke.

    摘要翻译： 来自亚硫酸盐蒸煮器的亚硫酸钠废液预热，然后在封闭系统中，在自生压力为450〜700°F的温度下加热0.5〜6小时，形成流出液和硫 含焦炭。 燃烧焦炭以为该过程提供蒸汽并且SO 2放出的烟道气被排放液体吸收，从而形成再循环至消化器的另外的蒸煮液。 来自蒸煮器的挥发性气体也被氧化成与通过燃烧焦炭形成的SO 2组合的SO 2。