公开(公告)号：EP0399999B1

公开(公告)日：1992-10-21

申请号：EP88901945.1

申请日：1988-02-03

申请人： CAUSTEC AKTIEBOLAG

发明人： PETTERSSON, Bertil

IPC分类号： D21C11/04

CPC分类号： D21C11/0078 ,  Y10S423/03

摘要： Method for cleaning of green liquor from impurities consisting of solid particles. Caustic lime, corresponding to 0,5-10 % of the amount caustic lime necessary for complete causticizing of the green liquor, is added to the green liquor in the soda dissolving tank or in a separate mixing tank to which the liquor is led directly from the dissolving tank. Calcium carbonate precipitates and forms with the particles of impurities with considerably better settling- and filtration properties than the particles in green liquor which has not been treated with caustic lime.

公开(公告)号：EP0369650A3

公开(公告)日：1991-05-29

申请号：EP89311391.0

申请日：1989-11-02

申请人： F.L. Smidth & Co. A/S

发明人： Theil, Jorgen

IPC分类号： D21C11/00

CPC分类号： D21C11/0078

摘要： In a method and using an apparatus for carrying out the method for the treatment of calcium carbonate slurry ("mesa"), which is a re-utilizable residue from the causticisation of sodium carbonate with burnt lime in the manufacture of paper after the sulphate process, the lime sludge or "mesa cake" is conditioned in a mixer (21) with dry, powderous raw material (CaCO₃) to a loose, moist mesa pulp which is fed to the lower end of a riser pipe (17) constructed as a flash duct wherein the mesa pulp is suspended, dried and pulverized by means of hot smoke gas from a kiln (1), whereupon the dry, powderous product is separated from the smoke gas in a separa­tor (18) and fed to the kiln (1) for further treatment in same.

公开(公告)号：EP0165945A1

公开(公告)日：1986-01-02

申请号：EP85900029.0

申请日：1984-12-24

申请人： NORTH BROKEN HILL LIMITED

发明人： WUNDER, Heiko ,  GILLETT, John, David ,  SCUKOVIC, Jack ,  BENNETT, Allan, John

IPC分类号： C01G49 ,  C01D1 ,  D21C11

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

摘要： Dans un procédé pour améliorer la pureté d'hydroxydes de métal alcalin, on utilise des composés de métal alcalino-terreux pour rendre les impuretés insolubles, diminuant ainsi la pénétration d'impuretés dans une solution d'hydroxyde de métal alcalin ou favorisant le retrait d'impuretés d'une solution contaminée d'hydroxydes de métal alcalin. La présente invention peut être appliquée en particulier pour augmenter la pureté d'hydroxydes de métal alcalin régénéré à partir de liqueur épuisée résultant de la pulpation alcaline exempte de soufre du bois ou la pureté d'un autre matériau naturel contenant des fibres cellulosiques.

公开(公告)号：EP3145866B1

公开(公告)日：2024-08-21

申请号：EP15728958.8

申请日：2015-05-15

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

CPC分类号： C01F11/181 ,  C01F11/183 ,  D21C11/0078 ,  C01F11/182 ,  Y02P40/40 ,  B01D9/0036 ,  Y02C20/40

公开(公告)号：EP3280841A1

公开(公告)日：2018-02-14

申请号：EP16776988.4

申请日：2016-04-01

申请人： Valmet AB

发明人： ANTONSSON, Stefan ,  LINDGREN, Christofer ,  LINDSTRÖM, Mikael ,  HOGEBRANDT, Eva

IPC分类号： D21C11/04 ,  B01D61/00 ,  C01B17/34 ,  B01D69/02 ,  B01D71/02 ,  C25B1/16

CPC分类号： D21C11/0057 ,  B01D61/14 ,  B01D71/024 ,  B01D2315/10 ,  C01B17/36 ,  C25B1/00 ,  C25B3/02 ,  D21C3/022 ,  D21C3/26 ,  D21C11/0042 ,  D21C11/0071 ,  D21C11/0078

摘要： The invention is related to improved polysulfide production process wherein a specific second filtration process (Fx) is installed before the polysulfide reactor (Rc). According to the inventive method a cross flow filter (Fx) is used as the second filtration process reaching astonishing low levels of residual solids in the white liquor as well as extended availability of the second filtration process. The subsequent polysulfide reactor, either in form of an electrolytic cell or in form of a bed of active carbon, could then also be operated at increased availability. The invention increases the production volume of polysulfide and the retentate from the cross filtering process may be bled out continuously to a process position ahead of a first filtering or clarification stage, capturing most of the increased content of lime mud particles in the retentate and causing less disturbance of the process with a minimum of tanks and pumps.

公开(公告)号：EP2961884B1

公开(公告)日：2016-11-30

申请号：EP14712556.1

申请日：2014-02-18

申请人： Mondi AG

发明人： RÜF, Walter ,  HACKER, Manfred ,  RAFFALT, Stefan

IPC分类号： D21C11/00

CPC分类号： D21C11/0078 ,  D21C11/0071 ,  D21C11/0085 ,  Y02P40/44

公开(公告)号：EP2969953A2

公开(公告)日：2016-01-20

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 ,  C01B31/20 ,  B01D53/62

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.

摘要翻译： 将一部分碳酸盐转化为氢氧化物的技术包括接收包含0.1M（摩尔/升溶液）至4.0M氢氧化物和0.1M至4.1M碳酸盐的碱性碳酸盐溶液; 在熟化过程中使生石灰（CaO）和低碳酸盐含量的液体反应，得到主要熟石灰（Ca（OH）2）的浆料）; 并使Ca（OH）2浆液和碱性碳酸盐溶液在流化床反应结晶器中生成体积为0.0005mm 3至5mm 3的碳酸钙（CaCO 3）晶体聚集体。

公开(公告)号：EP2235255B1

公开(公告)日：2014-08-27

申请号：EP08856582.5

申请日：2008-12-04

申请人： Valmet Aktiebolag

发明人： KINDLUND, Sören ,  ROWE, Michael A ,  BARTHELSON, Hans

IPC分类号： D21C11/04 ,  F16K7/07

CPC分类号： D21C11/0078 ,  B01D33/21 ,  B01D33/466 ,  B01D33/48 ,  B01D33/76 ,  B01D37/02 ,  Y02P40/44

摘要： The tube valve is for the output of a finely granulated material preferably dry lime mud that maintains a level of dry matter content of 65-90%. The tube valve has an elastic inner tube arranged within a pressure chamber that surrounds the elastic inner tube. A tube valve is used as an outlet from the pressurized process. The tube valve has a minimum length that is twice a diameter of the tube. A column of lime mud can be held within it as a pressure lock. The column of lime mud can be caused to descend through the tube valve by controlling a difference in pressure between an inner surface and an outer surface of the tube such that the diameter of the tube expands essentially uniformly along its length by 5-10% or by at least 4-6 millimeters.

公开(公告)号：EP2414585A1

公开(公告)日：2012-02-08

申请号：EP10759123.2

申请日：2010-03-30

申请人： Cleanflow Ab

发明人： LINDSTRÖM, Mikael ,  LINDGREN, Christofer ,  BÖRJESON, Lennart ,  KÄLLÉN, Lennart

IPC分类号： D21C11/00 ,  B01D29/37 ,  B01D69/02

CPC分类号： D21C11/0078 ,  B01D61/142 ,  B01D61/147 ,  B01D69/04 ,  B01D71/02 ,  B01D2311/25 ,  B01D2317/02 ,  B01D2325/02

摘要： Green liquor clarification comprising filtering of a flowing suspension containing solids, wherein the suspension is brought into contact with a first filter unit (4), said 5 filter unit (4) comprising one or several filter elements (12) comprising one or several filter bodies (3) having filter channels (33) within the filter bodies (3) with a filtering layer (32), a part of the suspension is forced to pass through the filtering layer (32) from a first/inner surface (32A) to a second/outer surface (32B) of the filtering layer (32) forming a filtrate while the solids substantially remains in a residual part of the suspension forming a slurry and where the filtering layer (32) is made of a membrane material with pores, said pores having a pore size of 0.1-10 micrometer, more preferred 0.1-5 micrometer and most preferred 0.2-1.0 micrometer.

公开(公告)号：EP2382353A2

公开(公告)日：2011-11-02

申请号：EP09750912.9

申请日：2009-04-02

申请人： FLSmidth A/S

发明人： FLANAGAN, Peter

IPC分类号： D21C11/00

CPC分类号： D21C11/0078 ,  Y02P40/44

摘要： A method of and apparatus for treating a green liquor stream produced in a kraft pulp process to separate green liquor from dregs present in the stream by utilizing a filtration vessel that has a pressure differential between the green liquor inlet and outlet to drive the dregs from the green liquor. In addition, negative pressure is utilized in the filtration vessel to thereby drive water vapor from and consequently cool the filtered green liquor.