SE455708B - Sett att reglera matningskretsloppets alkalitet vid forhydrolysering av treflis - Google Patents
Sett att reglera matningskretsloppets alkalitet vid forhydrolysering av treflisInfo
- Publication number
- SE455708B SE455708B SE8300687A SE8300687A SE455708B SE 455708 B SE455708 B SE 455708B SE 8300687 A SE8300687 A SE 8300687A SE 8300687 A SE8300687 A SE 8300687A SE 455708 B SE455708 B SE 455708B
- Authority
- SE
- Sweden
- Prior art keywords
- liquid
- hydrolysis
- cycle
- acid
- alkaline
- Prior art date
Links
- 239000007788 liquid Substances 0.000 claims description 22
- 230000007062 hydrolysis Effects 0.000 claims description 19
- 238000006460 hydrolysis reaction Methods 0.000 claims description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims description 5
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 2
- 239000002585 base Substances 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 22
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 7
- 235000010265 sodium sulphite Nutrition 0.000 description 7
- 239000011734 sodium Substances 0.000 description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 239000007832 Na2SO4 Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 159000000011 group IA salts Chemical class 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000029219 regulation of pH Effects 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/02—Chip soaking
Landscapes
- Paper (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI820456A FI63790C (fi) | 1982-02-11 | 1982-02-11 | Saett att reglera matningscirkulationens alkalitet vid foerhydrolysering av traeflis |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE8300687D0 SE8300687D0 (sv) | 1983-02-09 |
| SE8300687L SE8300687L (sv) | 1983-08-12 |
| SE455708B true SE455708B (sv) | 1988-08-01 |
Family
ID=8515109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8300687A SE455708B (sv) | 1982-02-11 | 1983-02-09 | Sett att reglera matningskretsloppets alkalitet vid forhydrolysering av treflis |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4456750A (fi) |
| FI (1) | FI63790C (fi) |
| SE (1) | SE455708B (fi) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995009269A1 (en) * | 1993-09-27 | 1995-04-06 | Kvaerner Pulping Technologies Ab | Preparation of cooking liquor containing sulphite |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4668340A (en) * | 1984-03-20 | 1987-05-26 | Kamyr, Inc. | Method of countercurrent acid hydrolysis of comminuted cellulosic fibrous material |
| WO2004106624A1 (en) * | 2003-06-03 | 2004-12-09 | Pacific Pulp Resources Inc. | Method for producing pulp and lignin |
| US7879406B2 (en) * | 2006-05-15 | 2011-02-01 | Harris Research, Inc | Sealer composition |
| US7815876B2 (en) | 2006-11-03 | 2010-10-19 | Olson David A | Reactor pump for catalyzed hydrolytic splitting of cellulose |
| US7815741B2 (en) | 2006-11-03 | 2010-10-19 | Olson David A | Reactor pump for catalyzed hydrolytic splitting of cellulose |
| US9371612B2 (en) * | 2011-02-22 | 2016-06-21 | Andritz Inc. | Method and apparatus to produce pulp using pre-hydrolysis and Kraft cooking |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1891337A (en) * | 1930-01-09 | 1932-12-20 | Du Pont | Process of producing cellulose |
| US2885317A (en) * | 1954-03-30 | 1959-05-05 | Stora Kopparbergs Bergslags Ab | Method in manufacturing chemical or semi-chemical pulp from heavily resinous wood |
| DE1198666B (de) * | 1961-10-20 | 1965-08-12 | Metallgesellschaft Ag | Verfahren zur Erzeugung von Zellstoff |
| SU390219A1 (ru) * | 1969-12-23 | 1973-07-11 | СПОСОБ ПОЛУЧЕНИЯ еУЛЬФЙТМОЙ ЦЕЛЛЮЛОЗЬ! | |
| SU392195A1 (fi) * | 1971-02-23 | 1973-07-27 | Киевский ордена Ленина политехнический институт лети Великой Окт брьской социалистической революции |
-
1982
- 1982-02-11 FI FI820456A patent/FI63790C/fi not_active IP Right Cessation
-
1983
- 1983-02-02 US US06/463,068 patent/US4456750A/en not_active Expired - Fee Related
- 1983-02-09 SE SE8300687A patent/SE455708B/sv not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995009269A1 (en) * | 1993-09-27 | 1995-04-06 | Kvaerner Pulping Technologies Ab | Preparation of cooking liquor containing sulphite |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8300687D0 (sv) | 1983-02-09 |
| FI63790B (fi) | 1983-04-29 |
| US4456750A (en) | 1984-06-26 |
| SE8300687L (sv) | 1983-08-12 |
| FI63790C (fi) | 1983-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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