公开(公告)号：EP3122932A1

公开(公告)日：2017-02-01

申请号：EP15723251.3

申请日：2015-03-26

申请人： Andritz Oy

发明人： HAMMARBERG, Tommi ,  KOTTILA, Mika ,  MANTSINEN, Matti ,  SUUTARI, Simo

IPC分类号： D21C11/00

CPC分类号： D21C11/0078 ,  B01D33/06 ,  B01D33/21 ,  D21C9/06 ,  D21C11/0064 ,  D21C11/0085 ,  F16J15/002 ,  F16J15/40 ,  Y02P40/44

摘要： A method and a liquor filter, in which liquor filter sealing medium is fed via a sealing medium channel (3) into an innermost sealing zone formed by an innermost sealing member (1), an outer seal (2) and the space between them at a causticizing plant of a chemical pulp mill. The sealing medium used is an alkaline sealing liquid and/or gas, which does not substantially dilute the liquor being filtered. Advantageously the sealing medium is filtrate from the liquor filter and/or gas taken from the interior of the liquor filter.

摘要翻译： 一种方法和一种液体过滤器，其液过滤器的密封介质通过密封介质通道供给（3）代入（2）由（1）在外部密封件在最里面的密封部件形成在最内密封区，并在它们之间的空间 化学纸浆厂的苛化车间。 所使用的密封介质是碱性密封液体和/或气体，其基本上不稀释被过滤的液体中。 有利地，密封介质是从液体中过滤器和/或气体从过滤液的内部采取滤液。

公开(公告)号：EP2711339A4

公开(公告)日：2014-12-10

申请号：EP11865611

申请日：2011-12-15

申请人： ECOFILL ESPECIALIDADES EM TECNOLOGIA DE TRANSFORMAÇ O DE RESÍDUOS LTDA

发明人： DA SILVA MÁRCIO NUNES

IPC分类号： C01F11/18 ,  C01F11/00 ,  C05D1/00 ,  C05D3/02 ,  C05F7/00 ,  D21C11/00

CPC分类号： C01F11/185 ,  C01P2004/62 ,  C01P2006/22 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/82 ,  C05D1/00 ,  C05D3/02 ,  C05F7/005 ,  D21C11/0078 ,  Y10T428/2982

公开(公告)号：EP2711339A1

公开(公告)日：2014-03-26

申请号：EP11865611.5

申请日：2011-12-15

申请人： Ecofill Especialidades em Tecnologia de Transformação de Resíduos Ltda

发明人： DA SILVA, Márcio Nunes

IPC分类号： C01F11/18 ,  C01F11/00

CPC分类号： C01F11/185 ,  C01P2004/62 ,  C01P2006/22 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/82 ,  C05D1/00 ,  C05D3/02 ,  C05F7/005 ,  D21C11/0078 ,  Y10T428/2982

摘要： System for producing precipitated calcium carbonate from calcium carbonate slurry waste; method for calcium carbonate slurry waste recovery, processing and purification and the precipitated calcium carbonate product thereof". The application defines a system for producing precipitated CaCO3, said system having separation (ml), recovery (m2), processing (m3) and purification (m4) modules; a method for calcium carbonate slurry waste recovery, processing and purification, wherein additives (dispersants) and lime are added to the slurry, said slurry being subjected to the following steps: hydration (20-70% solids), separation using a sieve, acidulation/carbonation using CO2 from the boiler (step wherein phosphoric acid is added along with chelating acidulants such as sulfuric acid, hydrogen peroxide and citric acid), decanting, delaminating, homogenization (with dispersants being added), separation using a sieve, stabilization (pH adjusted to between 8 and 9.5) and drying (1.0% average humidity); and the precipitated calcium carbonate that has an average PSD of 3.0 µm, a minimum ISO purity of 92%, a total carbonate content of 95% and iron (Fe203) content

摘要翻译： 系统用于从碳酸钙浆料废物沉淀碳酸钙; 对于碳酸钙浆料废物回收，处理和纯化以及它们的沉淀碳酸钙产物”的方法。该应用程序定义了一个系统，用于生产沉淀碳酸钙，所述系统具有分离（毫升），恢复（M2），处理（M3）和纯化（ M4）的模块;用于碳酸钙浆料废物回收，处理和纯化，worin添加剂（分散剂）和石灰的方法被添加到该浆料，所述浆料在经受以下步骤：在使用水合（20-70％固体）分离 使用来自锅炉的CO 2的筛，酸化/碳酸化（步骤worin磷酸加入地连同螯合酸化剂：如硫酸，过氧化氢和柠檬酸）使用筛，倾析，分层，均质（具有被添加的分散剂），分离 ，稳定（pH值调节至8和9.5之间），并进行干燥（1.0％平均湿度）;以及沉淀碳酸钙并具有以平均3.0微米，迷你的PSD 的92％ISO的妈妈纯度，95％和铁（Fe203）含量<200ppm的总碳酸盐含量。 本申请还描述了使用从纸生产锅炉的CO 2的用于调节的方法中使用的水的pH值，以及使用的石灰石废物没有富含有机成分（来自碳酸钙淤浆的第一分离工序中得到 使用用于校正土壤的筛网）。

公开(公告)号：EP1177344B1

公开(公告)日：2009-04-01

申请号：EP99931647.4

申请日：1999-05-07

申请人： Metso Fiber Karlstad AB

发明人： WESTERBERG, Lennart ,  BEARRY, W., George ,  LÖWNERTZ, Patrik ,  PARKER, Don

IPC分类号： D21C11/04 ,  C04B2/08

CPC分类号： B01J8/003 ,  B01J8/20 ,  B01J2208/00176 ,  B01J2208/00752 ,  B01J2219/00006 ,  C01D1/22 ,  C01F11/18 ,  C04B2/06 ,  D21C11/0064 ,  D21C11/0078 ,  C04B2/08

摘要： Feeding device (1) for feeding burned lime to a reaction vessel for causticizing a soda liquor to caustic soda, which feeding device, in its upper part, comprises an inlet for a slurry of said burned lime and said soda liquor, or inlets (3, 4) for said burned lime and said soda liquor, respectively, for formation of said slurry inside said feeding device, and further comprises a feed vessel (9) of tall and slender shape, which feed vessel in its lower part comprises an outlet (10) for said slurry, which outlet, via one or more pump(s) (24, 25), is operatively connected to said reaction vessel. The invention also relates to a process and a feeding system which utilises said feeding device, in which process the slurry is created of said burned lime and a first part of said soda liquor, a second part being preheated (28) before addition to the slurry, whereafter slaking and causticizing reactions are completed under elevated temperature and pressure.

公开(公告)号：EP1194376A4

公开(公告)日：2004-04-07

申请号：EP00918583

申请日：2000-04-20

申请人： ALCOA AUSTRALIA

发明人： DE WITT GERALDINE CHARMAINE ,  ROACH GERALD IAN DUNSTAN ,  REID GLENN

IPC分类号： C01F7/06 ,  C01F7/47 ,  D21C11/00 ,  C01F11/18

CPC分类号： D21C11/0078 ,  C01F7/0646 ,  C01F7/47

摘要： A method for the causticisation of an alkaline solution, the method characterised by the step of adding a quantity of lime to the alkaline solution to produce a reaction mixture in such a manner that the reaction temperature of the reaction mixture so produced rapidly exceeds the atmospheric boiling point of the alkaline solution.

公开(公告)号：EP1092059A1

公开(公告)日：2001-04-18

申请号：EP99955306.8

申请日：1999-05-28

申请人： U.S. BORAX INC.

发明人： BAIR, Charles, M. ,  MCBROOM, Robert, B. ,  TRAN, Honghi, N.

IPC分类号： D21C11/00 ,  D21C11/04

CPC分类号： D21C11/0078 ,  D21C3/02 ,  Y02P40/44

摘要： A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide is regenerated from sodium carbonate-containing smelts in such pulp processes by autocausticization through the addition of limited amounts of borate. Autocausticization may be carried out at boron to carbonate molar ratios below 2:1 and at sodium to boron molar ratios exceeding 3:1, resulting in high reaction efficiency. Partial autocausticization using borate may also be combined with conventional lime recausticization for the regeneration of sodium hydroxide from sodium carbonate-containing smelts.

公开(公告)号：EP0750699A1

公开(公告)日：1997-01-02

申请号：EP95910568.0

申请日：1995-03-06

申请人： A.AHLSTROM CORPORATION

发明人： ENGDAHL, Holger ,  POKKINEN, Martti ,  TÖRMIKOSKI, Pekka

IPC分类号： D21C11

CPC分类号： D21C11/0078 ,  Y02P40/44

摘要： The present invention relates to a method of and an apparatus for treating the green liquor formed in a sulphate pulp mill, especially to a method of enhancing the clarification of the green filter. According to the invention, at least a portion of the green liquor stream of the mill is directed into a clarifier. Clarified green liquor is discharged from the clarifier while dregs-containing green liquor is discharged from the bottom of the clarifier. The dregs-containing green liquor is directed into a filter, in which it is filtered for forming a filtrate and a dregs. Dregs separated from the green liquor can be washed already in this step, thus lightening the load on the actual dregs filter. Filtrate, i.e. filtered green liquor, is directed for further treatment along with clarified green liquor. The connection according to the invention enables a portion of the stream of green liquor to be directed past the clarifier directly to the filter along with dregs-containing green liquor.

公开(公告)号：EP0654558A1

公开(公告)日：1995-05-24

申请号：EP94850182.0

申请日：1994-10-20

申请人： ENSO-GUTZEIT OY

发明人： Törönen, Marjo ,  Kurittu, Hannu

IPC分类号： D21C11/04

CPC分类号： D21C11/0078

摘要： The present invention relates to a method of processing white liquor (3) obtained from the causticization step of a pulp mill, in which method the infeed white liquor (3) principally contains sodium hydroxide (6) and sodium sulfide (7). The method according to the invention is characterized in that the sodium hydroxide (6) contained in the white liquor (3) is separated from the white liquor (3) either entirely or partly by means of a diffusion dialysis process (4). The invention is further characterized in that the sodium hydroxide (6) separated from the white liquor (3) is advantageously entirely returned back to the chemical circulation of the pulp mill.

摘要翻译： 本发明涉及一种从纸浆厂的苛化步骤获得的白液（3）的处理方法，其中进料白液（3）主要含有氢氧化钠（6）和硫化钠（7）。 根据本发明的方法的特征在于，白液（3）中所含的氢氧化钠（6）通过扩散透析方法（4）从白液（3）全部或部分分离。 本发明的特征还在于与白液（3）分离的氢氧化钠（6）有利地完全返回到纸浆厂的化学循环。

公开(公告)号：EP0165945A4

公开(公告)日：1986-07-17

申请号：EP85900029

申请日：1984-12-24

申请人： NORTH BROKEN HILL LTD

发明人： WUNDER HEIKO ,  GILLETT JOHN DAVID ,  SCUKOVIC JACK ,  BENNETT ALLAN JOHN

IPC分类号： C01G49/00 ,  C01D1/04 ,  C01D1/22 ,  C01D1/28 ,  C01D1/32 ,  D21C11/00 ,  D21C11/04 ,  D21C11/12

CPC分类号： D21C11/122 ,  C01D1/32 ,  D21C11/0078

摘要： In a method for increasing the purity of alkali metal hydroxides, alkaline earth metal compounds are used to render contaminants insoluble, thereby lessening the entry of contaminants into a solution of alkali-metal hydroxide, or promoting removal of contaminants from a contaminated solution of alkali-metal hydroxide. The invention is particularly applicable to increasing the purity of alkali metal hydroxides regenerated from the spent liquor resulting from sulphur-free alkaline pulping of wood or of other natural material containing cellulose fibres.

摘要翻译： 在提高碱金属氢氧化物纯度的方法中，使用碱土金属化合物来使污染物不溶，从而减少污染物进入碱金属氢氧化物溶液，或促进污染物从碱金属氢氧化物污染溶液中除去， 金属氢氧化物 本发明特别适用于提高由木材或含纤维素纤维的其他天然材料的无硫碱性制浆产生的废液再生的碱金属氢氧化物的纯度。

公开(公告)号：EP2969953B1

公开(公告)日：2018-01-10

申请号：EP14726788.4

申请日：2014-03-11

申请人： Carbon Engineering Limited Partnership

发明人： KEITH, David William ,  HEIDEL, Kenton Robert ,  RITCHIE, Jane Anne ,  KAINTH, Arvinder Pal Singh

IPC分类号： C01F11/18 ,  C01D1/22 ,  D21C11/00 ,  B01D53/62 ,  B01D9/00

CPC分类号： B01J8/20 ,  B01D9/0036 ,  B01D9/0054 ,  B01D9/0059 ,  B01D9/0063 ,  B01D53/62 ,  B01D2009/0086 ,  B01D2251/404 ,  B01D2257/504 ,  B01J6/001 ,  C01B32/50 ,  C01D1/22 ,  C01F11/181 ,  D21C11/0078 ,  Y02P20/152 ,  Y02P40/44 ,  Y02P70/24

摘要： Techniques for converting a portion of a carbonate to hydroxide include receiving an alkaline carbonate solution that includes between 0.1M (moles per liter of solution) to 4.0M hydroxide and between 0.1M to 4.1M carbonate; reacting, in a slaking process, quicklime (CaO) and a low carbonate content fluid to yield a slurry of primarily slaked lime (Ca(OH)2); and reacting the Ca(OH)2 slurry and the alkaline carbonate solution to grow calcium carbonate (CaCO3) crystal aggregates of 0.0005 mm3 to 5 mm3 in volume in a fluidized-bed reactive crystallizer.