GB1288243A - - Google Patents
Info
- Publication number
- GB1288243A GB1288243A GB5427369A GB5427369A GB1288243A GB 1288243 A GB1288243 A GB 1288243A GB 5427369 A GB5427369 A GB 5427369A GB 5427369 A GB5427369 A GB 5427369A GB 1288243 A GB1288243 A GB 1288243A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- aqueous
- fiberising
- acid
- solution containing
- Prior art date
- 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
Links
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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/222—Use of compounds accelerating the pulping processes
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
1288243 Preparing wood pulp VITA MAYER & C GIA F IIi VITA SAS 5 Nov 1969 [30 July 1969 26 Sept 1969] 54273/69 Heading D2W A method of pulping comprises treating lignocellulosic material with an alkaline solution containing sodium borohydride in an amount at least 0.1% by wt. of the material, separating the solution from the material and mechanically fiberising the material, the method also including treating with an aqueous acid solution. The treatment with acid may be after fiberising, immediately after separating the material from solution, prior to separation, or before treatment with alkaline solution. The alkaline solution may be aqueous NaOH; an aqueous solution containing NaOH and Na 2 SO 3 an aqueous solution containing Na 2 SO 3 and Na 2 CO 3 ; or a buffered aqueous solution of Na 2 SO 3 . The acid solution may be of SO 2 or NaHSO 3 . Prior to fiberising, the material may be cooked with the salt formed by reaction of the acid with the alkali. Alternatively the material may be cooked, before fiberising with aqueous Na 2 SO 3 . The process may be used on poplar, red spruce or tropical hardwoods.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2028569 | 1969-07-30 | ||
| IT2255069 | 1969-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1288243A true GB1288243A (en) | 1972-09-06 |
Family
ID=26327474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5427369A Expired GB1288243A (en) | 1969-07-30 | 1969-11-05 |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5025041B1 (en) |
| BE (1) | BE741017A (en) |
| CH (1) | CH510168A (en) |
| DD (1) | DD98711A1 (en) |
| GB (1) | GB1288243A (en) |
| HU (1) | HU163366B (en) |
| IL (1) | IL33277A (en) |
| LU (1) | LU59701A1 (en) |
| NL (1) | NL7000037A (en) |
| NO (1) | NO128667B (en) |
| RO (1) | RO61970A (en) |
| SU (1) | SU524533A3 (en) |
| YU (1) | YU33632B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006061480A1 (en) * | 2006-12-23 | 2008-06-26 | Voith Patent Gmbh | Producing fibrous material comprises producing a chemical solution, mixing the chemical solution with wood and/or annual plant; heating the chemical solution and pulping and then separating the woods and the chemical solution |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338402A (en) * | 1987-05-25 | 1994-08-16 | Societe Atochem | Process for preparing a bleached chemithermomechanical pulp |
| FR2615874B1 (en) * | 1987-05-25 | 1992-02-21 | Atochem | PROCESS FOR THE PREPARATION OF CHEMICOTHERMOMECHANICAL PASTES |
| JP4738662B2 (en) * | 2001-08-03 | 2011-08-03 | 日本製紙株式会社 | Newspaper |
-
1969
- 1969-10-24 CH CH1589869A patent/CH510168A/en not_active IP Right Cessation
- 1969-10-27 LU LU59701D patent/LU59701A1/xx unknown
- 1969-10-29 IL IL33277A patent/IL33277A/en unknown
- 1969-10-30 BE BE741017D patent/BE741017A/xx unknown
- 1969-10-30 NO NO04300/69A patent/NO128667B/no unknown
- 1969-11-05 GB GB5427369A patent/GB1288243A/en not_active Expired
- 1969-11-08 RO RO61508A patent/RO61970A/ro unknown
- 1969-11-12 DD DD143681A patent/DD98711A1/xx unknown
- 1969-11-12 YU YU2831/69A patent/YU33632B/en unknown
- 1969-11-13 JP JP44090524A patent/JPS5025041B1/ja active Pending
- 1969-11-13 SU SU1375937A patent/SU524533A3/en active
- 1969-11-20 HU HUVI710A patent/HU163366B/hu unknown
-
1970
- 1970-01-05 NL NL7000037A patent/NL7000037A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006061480A1 (en) * | 2006-12-23 | 2008-06-26 | Voith Patent Gmbh | Producing fibrous material comprises producing a chemical solution, mixing the chemical solution with wood and/or annual plant; heating the chemical solution and pulping and then separating the woods and the chemical solution |
Also Published As
| Publication number | Publication date |
|---|---|
| YU283169A (en) | 1977-04-30 |
| DD98711A1 (en) | 1973-07-12 |
| HU163366B (en) | 1973-07-28 |
| NL7000037A (en) | 1971-02-02 |
| LU59701A1 (en) | 1970-01-12 |
| IL33277A (en) | 1973-05-31 |
| NO128667B (en) | 1973-12-27 |
| IL33277A0 (en) | 1969-12-31 |
| JPS5025041B1 (en) | 1975-08-20 |
| BE741017A (en) | 1970-04-01 |
| CH510168A (en) | 1971-07-15 |
| RO61970A (en) | 1977-07-15 |
| SU524533A3 (en) | 1976-08-05 |
| YU33632B (en) | 1977-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |