D21C11/0021 - CPC Classification Index

ClassID:

126429 ⎘

D21C11/0021 - CPC Classification

Classification description:

Regeneration of pulp liquors or effluent waste waters Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)

Sub-classes:

D21C11/0028 » {Effluents derived from the washing or bleaching plants} 18

Recent Application in this class:

20240307825

2024-09-19

METHOD FOR PROCESSING BARK PRESS WATER FROM SAWMILLS AND/OR PULP MILLS

20200141057

2020-05-07

CATALYTIC CONVERSION OF LIGNIN

20190382959

2019-12-19

Method of preparing a sizing boost additive

20170211232

2017-07-27

METHOD FOR HANDLING SPENT WASH SOLUTION OF A LIGNIN-RECOVERY PROCESS

20170159238

2017-06-08

Method for utilizing lignin separated from black liquor as lime-kiln fuel

20160326697

2016-11-10

REFINING CELLULOSE IN A SOLVENT FOR PRODUCTION OF NANOCELLULOSE MATERIALS

20160273163

2016-09-22

METHOD FOR PRODUCING ACID WASHED CELLULOSIC FEEDSTOCK FOR ETHANOL PRODUCTION

20160145797

2016-05-26

Continuous digester and feeding system

20160002853

2016-01-07

Method for recovering chemicals and by-products from high-sulphidity pulping liquors

#10

20150259854

2015-09-17

Whitewater recovery process

#11

20140174679

2014-06-26

BCTMP filtrate recycling system and method

#12

20110232853

2011-09-29

BCTMP filtrate recycling system and method

#13

20100243184

2010-09-30

Method for treating liquid flows at a chemical pulp mill

#14

20100071861

2010-03-25

Method for an energy efficient production of cellulose pulp in a continuous digester

#15

20100041879

2010-02-18

Method for recovering a low sodium content lignin fuel from black liquor

#16

20060175029

2006-08-10

Batch process for preparing pulp

#17

20060070710

2006-04-06

Method and a device for preparing cellulose pulp