公开(公告)号：WO1998032914A1

公开(公告)日：1998-07-30

申请号：PCT/US1997001512

申请日：1997-02-05

Applicant: UNION CAMP PATENT HOLDING, INC.

Inventor： UNION CAMP PATENT HOLDING, INC. ,  PANGALOS, George ,  FALCONE, Ronald, A., Jr. ,  MAYO, William, L. ,  BOSCH, Gregory, J.

IPC: D21C09/153

CPC classification number: D21C9/153 ,  D21C9/1052

Abstract: A process control method for adjusting chemical application in response to the pulp brightness and/or lignin content is realized by utilizing a coupled control feedforward, feedback or combination feedforward/feedback control system, wherein brightness measurements are made between successive lignin content measurements and adjustments made to the chemical application in response to a comparison value.

Abstract translation: 通过利用耦合的控制前馈，反馈或组合前馈/反馈控制系统来实现响应于纸浆亮度和/或木质素含量来调节化学应用的过程控制方法，其中在连续的木质素含量测量和调整之间进行亮度测量 以化学应用为响应比较值。

公开(公告)号：WO1994013879A1

公开(公告)日：1994-06-23

申请号：PCT/FI1993000434

申请日：1993-10-22

Applicant: A. AHLSTROM CORPORATION ,  HENRICSON, Kaj ,  PHILLIPS, Joseph ,  GREENWOOD, Brian ,  FUNK, Erwin ,  DUNN, Stephen

Inventor： A. AHLSTROM CORPORATION

IPC: D21C09/153

CPC classification number: D21C9/10 ,  D21C9/153

Abstract: The present invention relates to a method of and an apparatus for bleaching pulp. The method and apparatus in accordance with the invention are especially suitable for bleaching pulp with ozone at medium consistency, in other words when the consistency is 5 - 25 %, preferably 10 - 15 %. It is characteristic of the invention that ozone is mixed into the pulp to be bleached by means of two fluidizing mixers (14 and 16) and that the foamy suspension of gas and pulp thus obtained is discharged to a reaction vessel (30), in which the suspension is mixed, for example, by a paddle mixer.

Abstract translation: 本发明涉及漂白纸浆的方法和装置。 根据本发明的方法和设备特别适用于在中等稠度的臭氧漂白纸浆，换句话说，当稠度为5-25％，优选为10-15％时。 本发明的特征是通过两个流化混合器（14和16）将臭氧混合到待漂白的纸浆中，并将由此获得的气体和纸浆的泡沫悬浮液排放到反应容器（30）中，其中 悬浮液例如通过桨式混合器混合。

公开(公告)号：WO1997006305A1

公开(公告)日：1997-02-20

申请号：PCT/US1996012776

申请日：1996-08-06

Applicant: BELOIT TECHNOLOGIES, INC.

Inventor： BELOIT TECHNOLOGIES, INC. ,  ROUNSAVILLE, Jeffrey ,  MINAMI, Shusuke

IPC: D21C09/153

CPC classification number: D21C11/06 ,  D21C9/153

Abstract: A method for reprocessing an ozone-containing gas present in a pulp bleaching plant comprising the steps of supplying the ozone-containing gas to a scrubber and reducing the ozone concentration of the gas as the gas flows through the scrubber. The step of reducing comprises the steps of supplying an alkaline medium to the scrubber and flowing the ozone-containing gas in countercurrent relationship with the alkaline medium within the scrubber so as to provide intimate contact between the ozone-containing gas and the alkaline medium, thereby converting the ozone-containing gas into a substantially ozone-free gas. The alkaline medium may comprise one of the following: a sodium hydroxide solution; white liquor; post oxygen stage filtrate; weak black liquor; or filtrate from an Eo stage of the pulp bleaching plant. The method further comprises the step of separately discharging the ozone-containing gas and the alkaline medium from the scrubber. The ozone-containing gas may comprise an off-gas, which has been partially reacted with a pulp within a pulp bleaching stage or alternatively may comprise fresh bleaching gas, having an ozone concentration ranging from about 6 % to about 14 % by weight within a carrier gas, with the fresh bleaching gas being supplied directly from an ozone generator to the scrubber.

Abstract translation: 一种用于再处理存在于纸浆漂白设备中的含臭氧气体的方法，包括以下步骤：当气体流过洗涤器时，将含臭氧的气体供给洗涤器并降低气体的臭氧浓度。 还原步骤包括以下步骤：向洗涤器供应碱性介质，并使含臭氧气体与洗涤器内的碱性介质呈逆流关系，从而提供含臭氧气体和碱性介质之间的紧密接触，从而 将含臭氧气体转化为基本上无臭氧的气体。 碱性介质可以包括以下之一：氢氧化钠溶液; 白酒 后氧阶段滤液; 弱黑液 或来自纸浆漂白设备的Eo阶段的滤液。 该方法还包括从洗涤器分离排出含臭氧气体和碱性介质的步骤。 含臭氧的气体可以包含废气，废气已经在纸浆漂白阶段中与纸浆部分反应，或者可以包含新鲜漂白气体，其中臭氧浓度范围为约6重量％至约14重量％ 载气，新鲜漂白气体从臭氧发生器直接供应到洗涤器。

公开(公告)号：WO1995010656A1

公开(公告)日：1995-04-20

申请号：PCT/CA1994000534

申请日：1994-09-27

Applicant: MacMILLAN BLOEDEL LIMITED

Inventor： MacMILLAN BLOEDEL LIMITED ,  MURPHY, Thomas, Howard ,  NORRIS, Robert, Glen

IPC: D21C09/153

CPC classification number: D21C9/153

Abstract: A process for bleaching pulp by impregnating the pulp with an aqueous organic solvent medium and then bleaching in an ozone stage (Z stage) to form a bleached pulp characterized in that organic solvent in the organic solvent medium accompanying the pulp through the ozone stage is stripped from the bleached pulp leaving the ozone stage and the separated organic solvent is recovered for reuse.

Abstract translation: 通过用含水有机溶剂介质浸渍纸浆然后在臭氧阶段（Z阶段）漂白以形成漂白纸浆来漂白纸浆的方法，其特征在于剥离伴随纸浆通过臭氧阶段的有机溶剂介质中的有机溶剂 从离开臭氧阶段的漂白纸浆中回收分离的有机溶剂以便重新使用。

公开(公告)号：WO1995006773A1

公开(公告)日：1995-03-09

申请号：PCT/US1994010050

申请日：1994-09-01

Applicant: UNION CAMP PATENT HOLDING, INC.

Inventor： UNION CAMP PATENT HOLDING, INC. ,  EACHUS, Spencer, W. ,  ALI, Omar, F. ,  PANGALOS, George ,  GRIGGS, Bruce, F. ,  GANDEK, Thomas, P. ,  PIKULIN, Michael, A. ,  ROSEN, Allen

IPC: D21C09/153

CPC classification number: D21C9/153 ,  D21C9/1057 ,  D21C9/147 ,  D21C9/163

Abstract: A process for delignifying and bleaching a lignocellulosic material (2) without the use of elemental chlorine or chlorine-containing compounds by forming (4) a pulp, oxygen delignifying (40) the pulp and thereafter further delignifying the oxygen delignified pulp by lifting, displacing and tossing the pulp in a radial direction while advancing it in an axial direction in a plug fow-like manner with an effective amount of ozone (88) for a sufficient time to obtain a substantially delignified pulp having a GE brightness of at least about 35 %. The substantially delignified pulp may then be brightened to a final product by treating the pulp with a brightening stage peroxide compound, followed by subsequently treating the pulp at low to medium consistency with ozone.

Abstract translation: 一种木质纤维素材料（2）的脱木素和漂白方法，不使用元素氯或含氯化合物，通过形成（4）纸浆，氧脱木质（40）纸浆，然后进一步脱木质化脱木素的纸浆，通过提升，置换 并且在径向方向上将纸浆倾斜，同时以有效量的臭氧（88）在塞子方向上以轴向方向推进足够的时间以获得具有至少约35的GE亮度的基本上脱木素的纸浆 ％。 然后通过用增亮阶段过氧化物处理纸浆，然后随后用臭氧以低至中等稠度处理纸浆，将基本上脱木素的纸浆变亮至最终产品。

公开(公告)号：WO1994011570A1

公开(公告)日：1994-05-26

申请号：PCT/US1993010686

申请日：1993-11-08

Applicant: UNION CAMP PATENT HOLDING, INC.

Inventor： UNION CAMP PATENT HOLDING, INC. ,  MCDONALD, George, W.

IPC: D21C09/153

CPC classification number: D21C9/153 ,  C01B13/11 ,  C01B2201/50 ,  D21C11/06

Abstract: A method for controlling the gas recycle loop of an ozone bleaching process wherein an ozone generator (18) produces an ozone containing gas from an oxygen containing feed gas (74) and delivers the ozone containing feed gas to an ozone reactor (22) at a variable flow rate responsive to reactor demand. Pulp (20) is bleached with the ozone containing gas, thereby producing an exhaust gas (38) having a flow rate that varies in response to the flow rate of the ozone gas delivered to the ozone reactor. The exhaust gas (38) is then recovered and its flow rate is modified within the recycle loop so that an amount equivalent to reactor ozone demand is returned to the ozone generator. The oxygen content of the oxygen containing feed gas is monitored at or near the inlet of the ozone generator and an amount of fresh oxygen is supplied to the oxygen containing feed gas (74) to obtain a predetermined level of oxygen therein.

Abstract translation: 一种用于控制臭氧漂白过程的气体循环回路的方法，其中臭氧发生器（18）从含氧进料气体（74）产生含臭氧的气体，并将含臭氧的进料气体输送到臭氧反应器（22） 响应于反应堆需求的可变流量。 用含臭氧气体漂洗纸浆（20），从而产生具有响应于输送到臭氧反应器的臭氧气体的流量而变化的流量的废气（38）。 废气（38）然后被回收，并且其流量在循环回路内被修改，使得等同于反应堆臭氧需求的量返回到臭氧发生器。 在臭氧发生器的入口处或附近监测含氧进料气体的氧含量，并且向含氧进料气体（74）供应一定量的新鲜氧气以在其中获得预定水平的氧气。

公开(公告)号：WO1992012289A1

公开(公告)日：1992-07-23

申请号：PCT/US1992000289

申请日：1992-01-02

Applicant: UNION CAMP PATENT HOLDING, INC.

Inventor： UNION CAMP PATENT HOLDING, INC. ,  ALI, Omar, F. ,  GRIGGS, Bruce, F. ,  GANDEK, Thomas, P. ,  PIKULIN, Michael, A. ,  ROSEN, Allen ,  TERRIT, Stuart, T. ,  EACHUS, Spencer, W. ,  WHITE, David, E. ,  FRIEND, William, H.

IPC: D21C09/153

CPC classification number: D21C9/163 ,  D21C9/1057 ,  D21C9/147 ,  D21C9/153

Abstract: A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine or chlorine-containing compounds by oxygen delignifying (40) the pulp to a K No. of about 10 or less, a viscosity of greater than about 12 cps and a GEB of about 33-43; and thereafter further delignifying (78) the partially delignified pulp by lifting, displacing and tossing the pulp in a radial direction while advancing it in an axial direction in a plug flow-like manner with an effective amount of ozone (88) for a sufficient time to obtain a substantially delignified pulp having a K No. of about 5 or less, a viscosity of at least about 9-10 cps and a GE brightness of at least about 59. The substantially delignified pulp (102) may then be brightened to a final product having a GE brightness of at least about 75, or alternately up to about 83+ by contacting the ozonated pulp with a sufficient amount of a peroxide compound for a time of up to about three hours, with optional mixing of the pulp/peroxide mixture.

Abstract translation: 一种木质纤维素纸浆的脱木素和漂白方法，其中不含元素氯或含氯化合物通过氧脱木质（40）将纸浆调节至约10或更小的K值，大于约12cps的粘度和GEB 约33-43; 然后通过在径向方向上提升，移动和抛弃纸浆，同时以有效量的臭氧（88）在轴向上以轴向方向推进足够的时间来进一步脱木素（78）脱木质素（78） 以获得具有约5或更小的K值，至少约9-10厘泊的粘度和至少约59的GE亮度的基本上脱木素的纸浆。然后将基本上脱木素的纸浆（102）变亮至 通过将臭氧化纸浆与足够量的过氧化物化合物接触至多约3小时，具有GE亮度至少约75，或者高达约83+的最终产品，任选地混合纸浆/过氧化物 混合物。

公开(公告)号：WO1997001667A1

公开(公告)日：1997-01-16

申请号：PCT/SE1996000882

申请日：1996-07-01

Applicant: SUNDS DEFIBRATOR INDUSTRIES AB ,  SCA Graphic Research AB ,  ANNERGREN, Göran ,  BOMAN, Maria ,  BOMAN, Rolf ,  NORDEN, Solveig

Inventor： SUNDS DEFIBRATOR INDUSTRIES AB ,  SCA Graphic Research AB

IPC: D21C09/153

CPC classification number: D21C9/153 ,  D21C9/166

Abstract: The present invention relates to a method of bleaching lignocellulosic fiber material in a combination step with ozone and peracid, such as peracetic acid, ZHCPaaMC. The invention preferably relates to the bleaching of sulphate pulp. The pulp is ozone treated in a HC step in an ozone reactor, whereafter the pulp is diluted with water or white water, and peracid is added prior to an MC bleaching tower with subsequent washing.

Abstract translation: 本发明涉及一种与臭氧和过酸如过乙酸（ZHCPaaMC）的组合步骤漂白木质纤维素纤维材料的方法。 本发明优选涉及硫酸盐纸浆的漂白。 纸浆在臭氧反应器中以HC步骤进行臭氧处理，然后用水或白水稀释纸浆，并且在MC漂白塔之前加入过酸，随后进行洗涤。

公开(公告)号：WO1995003448A1

公开(公告)日：1995-02-02

申请号：PCT/FR1994000910

申请日：1994-07-20

Applicant: DEGREMONT ,  AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE ,  COSTE, Christian ,  KALCK, Philippe ,  DUPRAT, Sylvie ,  MOLINIER, Jacques ,  XU, Jian ,  ZUMBRUNN, Jean-Pierre

Inventor： DEGREMONT ,  AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE

IPC: D21C09/153

CPC classification number: D21C9/153 ,  D21C9/1036

Abstract: A method for ozone bleaching unbleached chemical paper pulp in a single ozone stage and in the presence of a tertiary alcohol including four to eight carbon atoms which is fed into the reaction medium at a temperature of - 5 DEG C to 80 DEG C prior to the actual ozone treatment stage, whereby the gas-liquid transfer, the exchange potentiality, the lignin oxidation selectivity and the ozone efficiency are improved, and the consitency of the treated pulp undergoing ozone treatment is between 6 and 60 %.

Abstract translation: 在单一臭氧阶段和在含有4-8个碳原子的叔醇的存在下，在-5℃至80℃的温度下进料到反应介质中的臭氧漂白未漂白化学纸浆的方法， 实际的臭氧处理阶段，气液输送，交换势，木质素氧化选择性和臭氧效率得到提高，经处理的处理纸浆的一致性在6〜60％之间。

公开(公告)号：WO1994020673A1

公开(公告)日：1994-09-15

申请号：PCT/FI1993000222

申请日：1993-05-25

Applicant: A. AHLSTROM CORPORATION ,  HENRICSON, Kaj ,  STROMBERG, Bertil

Inventor： A. AHLSTROM CORPORATION

IPC: D21C09/153

CPC classification number: D21C9/1026 ,  D21C9/02 ,  D21C9/1036 ,  D21C9/1042 ,  D21C9/1057 ,  D21C9/147 ,  D21C9/153 ,  D21C9/163

Abstract: Kraft pulp is bleached to an acceptable brightness (e.g. 86 ISO or more) without using chlorinated organic compounds, yet the strength of the produced pulp remains commercially acceptable. In the manufacture of pulp, the pulp which is cooked and oxygen delignified to a kappa number of 14 or less, and then is bleached with ozone at a medium consistency. After the ozone treatment, heavy metals are removed from the pulp, and then the pulp is led to oxygen and/or peroxide treatment, which is followed by a second ozone bleaching stage. The sequence (ZT) (EOP) (ZP) is preferred.

Abstract translation: 牛皮纸浆在不使用氯化有机化合物的情况下漂白至可接受的亮度（例如86 ISO或更高），但生产纸浆的强度仍然可商业上可接受。 在纸浆的制造中，煮熟的纸浆和氧脱木质素为14以下，然后用中等稠度的臭氧漂白。 在臭氧处理之后，从纸浆中除去重金属，然后将纸浆导入氧气和/或过氧化物处理，随后进行第二个臭氧漂白阶段。 序列（ZT）（EOP）（ZP）是优选的。