D21C11/04 - CPC Classification Index

#1

20240124986

2024-04-18

METHOD FOR PRODUCING ALKALI METAL/ALKALINE EARTH METAL HYDROXIDE AND APPLICATION OF SAID PRODUCTION METHOD TO CARBOXYLATE WASTE RECYCLING TECHNOLOGY

#2

20230272581

2023-08-31

METHODS OF TREATING A KRAFT PROCESS RECOVERY CYCLE TO REDUCE METAL LEVELS AT THE KRAFT PROCESS

#3

20210355636

2021-11-18

Continuous process for production of cellulose pulp from grass-like feedstock

#4

20210189648

2021-06-24

Method and a system for removing hydrogen sulphide ions (HS) from a liquor of a pulp mill process

#5

20210010672

2021-01-14

Furnace floor protection in recovery boilers

#6

20190203416

2019-07-04

Process for isolation of hemicelluloses from biomass pulping process waters or spent liquors

#7

20190177914

2019-06-13

System and a method for producing aqueous sulphuric acid

#8

20190119852

2019-04-25

Recover of inorganic chemicals of the pulp and paper making processes using microwaves and related techniques

#9

20190024310

2019-01-24

Ultrasonic semelt dissolving and shattering system

#10

20180298554

2018-10-18

PROCESS FOR LIGNIN PURIFICATION AND ISOLATION

#11

20170369598

2017-12-28

Method for producing xylan-containing material

#12

20170306556

2017-10-26

Method for processing straw

#13

20160168790

2016-06-16

Process for obtaining cellulose

#14

20150345076

2015-12-03

Continuous method for the precipitation of lignin from black liquor

#15

20150315745

2015-11-05

Flared inlet insert for introducing flow into a flash tank

#16

20150225895

2015-08-13

Method and apparatus for obtaining strong white liquor and lime mud with low residual alkali level

#17

20150119559

2015-04-30

Method for lignin separation from black liquor

#18

20140374039

2014-12-25

Method for the causticizing process for producing white liquor

#19

20140352900

2014-12-04

Flash tank with flared inlet insert and method for introducing flow into a flash tank

#20

20140275498

2014-09-18

Method for precipitating lignin from black liquor by utilizing waste gases

#21

20140200334

2014-07-17

Process for treating lignin

#22

20130203972

2013-08-08

Continuous method for the precipitation of lignin from black liquor

#23

20110272110

2011-11-10

Method and system for high alpha dissolving pulp production

#24

20110272109

2011-11-10

Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse

#25

20110155335

2011-06-30

USE OF POLYSULFIDE IN MODIFIED COOKING

#26

20110120662

2011-05-26

Method and equipment for treatment of black liquor at pulp mill

#27

20110079364

2011-04-07

Process for Controlling Ammonia Loss

#28

20100224335

2010-09-09

Heat recovery from spent cooking liquor in a digester plant of a chemical pulp mill

#29

20090126883

2009-05-21

Use of polysulfide in modified cooking

#30

20080164222

2008-07-10

Method and apparatus for thickening lime mud in a disc filter

#31

20070227979

2007-10-04

Black liquor treatment method

#32

20060219375

2006-10-05

Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin

#33

20060169430

2006-08-03

METHOD FOR PRODUCING PULP AND LIGNIN

#34

20060075900

2006-04-13

Method for the production of green liquor

#35

20050199358

2005-09-15

Process for causticizing green liquor in chemical recovery from black liquor in alkaline pulping

#36

20050076568

2005-04-14

Partial oxidation of cellulose spent pulping liquor