FR872300A - Cellulose bleaching process - Google Patents

Cellulose bleaching process

Info

Publication number: FR872300A
Authority: FR; France
Prior art keywords: bleaching process; cellulose bleaching; cellulose; bleaching
Prior art date: 1937-07-23
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Aschaffenburger Zellstoffwerke AG

Original Assignee

Aschaffenburger Zellstoffwerke AG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1937-07-23

Filing date

1941-05-20

Publication date

1942-06-05

1941-05-20 Application filed by Aschaffenburger Zellstoffwerke AG filed Critical Aschaffenburger Zellstoffwerke AG

1942-06-05 Application granted granted Critical

1942-06-05 Publication of FR872300A publication Critical patent/FR872300A/en

Status Expired legal-status Critical Current

Classifications

- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)

FR872300D 1937-07-23 1941-05-20 Cellulose bleaching process Expired FR872300A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE841027X		1937-07-23
DEA772D DE948299C (en)	1937-07-23	1938-10-28	Process and apparatus for bleaching pulp

Publications (1)

Publication Number	Publication Date
FR872300A true FR872300A (en)	1942-06-05

Family

ID=25760429

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
FR841027D Expired FR841027A (en)	1937-07-23	1938-07-22	Process for bleaching cellulose using chlorine, especially chlorine gas
FR872300D Expired FR872300A (en)	1937-07-23	1941-05-20	Cellulose bleaching process

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
FR841027D Expired FR841027A (en)	1937-07-23	1938-07-22	Process for bleaching cellulose using chlorine, especially chlorine gas

Country Status (4)

Country	Link
US (1)	US2193301A (en)
CH (2)	CH208757A (en)
DE (1)	DE948299C (en)
FR (2)	FR841027A (en)

1938
- 1938-07-01 CH CH208757D patent/CH208757A/en unknown
- 1938-07-19 US US220116A patent/US2193301A/en not_active Expired - Lifetime
- 1938-07-22 FR FR841027D patent/FR841027A/en not_active Expired
- 1938-10-28 DE DEA772D patent/DE948299C/en not_active Expired
1939
- 1939-09-27 CH CH215082D patent/CH215082A/en unknown
1941
- 1941-05-20 FR FR872300D patent/FR872300A/en not_active Expired

Also Published As

Publication number	Publication date
DE948299C (en)	1956-08-30
CH215082A (en)	1941-05-31
CH208757A (en)	1940-02-29
FR841027A (en)	1939-05-09
US2193301A (en)	1940-03-12

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