GB1407276A - Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry - Google Patents
Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industryInfo
- Publication number
- GB1407276A GB1407276A GB5212672A GB5212672A GB1407276A GB 1407276 A GB1407276 A GB 1407276A GB 5212672 A GB5212672 A GB 5212672A GB 5212672 A GB5212672 A GB 5212672A GB 1407276 A GB1407276 A GB 1407276A
- Authority
- GB
- United Kingdom
- Prior art keywords
- titanium dioxide
- smelt
- caustic soda
- sodium carbonate
- mixture
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/20—Preparation by reacting oxides or hydroxides with alkali metal salts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/20—Preparation by reacting oxides or hydroxides with alkali metal salts
- C01D1/22—Preparation by reacting oxides or hydroxides with alkali metal salts with carbonates or bicarbonates
-
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0085—Introduction of auxiliary substances into the regenerating system in order to improve the performance of certain steps of the latter, the presence of these substances being confined to the regeneration cycle
- D21C11/0092—Substances modifying the evaporation, combustion, or thermal decomposition processes of black liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
1407276 Caustic soda OJI PAPER CO Ltd 14 Nov 1972 52126/72 Heading C1A [Also in Division D2] A caustic soda solution is made by adding an ilmenite ore or a material containing a major proportion of titanium dioxide to sodium carbonate or sodium bicarbonate, heating the mixture to 900‹ to 1500‹ C., dissolving the product in water and separating the liquid from the sludge containing titanium dioxide. 20 to 40% by weight of titanium dioxide, based on the weight of sodium carbonate or bicarbonate, may be added and silica may be present with the titanium dioxide in a ratio of 1 : 1 to 1 : 2. The process may be used for the recovery of cooking chemicals from pulping waste liquor by adding titanium dioxide or ilmenite ore to a smelt from a recovery boiler in a chemical recovery process for soda pulping waste liquor, heating the mixture to 900‹ to 1500‹ C., dissolving the product in water to convert the sodium oxide component in the smelt into sodium hydroxide, and separating the mother liquor from the sludge containing titanium dioxide. Kraft pulping waste liquor may be so treated, the mixture of titanium dioxide and smelt, with the optional addition of silica, preferably being heated in a non-oxidizing atmosphere. The titanium dioxide separated and precipitated from the mother liquor may then be recycled to the step of adding to a smelt after the titanium dioxide is heated to a temperature of 300‹ C. in the atmosphere and completely oxidized.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5212672A GB1407276A (en) | 1972-11-10 | 1972-11-10 | Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry |
DE19722257463 DE2257463C3 (en) | 1972-11-23 | Process for the recovery of sodium hydroxide from the incineration of alkaline pulp waste liquors | |
FR7244029A FR2209718B1 (en) | 1972-11-10 | 1972-12-11 |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5212672A GB1407276A (en) | 1972-11-10 | 1972-11-10 | Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry |
DE19722257463 DE2257463C3 (en) | 1972-11-23 | Process for the recovery of sodium hydroxide from the incineration of alkaline pulp waste liquors | |
FR7244029A FR2209718B1 (en) | 1972-11-10 | 1972-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1407276A true GB1407276A (en) | 1975-09-24 |
Family
ID=27184863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5212672A Expired GB1407276A (en) | 1972-11-10 | 1972-11-10 | Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2209718B1 (en) |
GB (1) | GB1407276A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1983003407A1 (en) * | 1982-03-25 | 1983-10-13 | Nguyen, Kien, Loi | Alkali regeneration process |
WO2020220117A1 (en) * | 2019-04-29 | 2020-11-05 | Fpinnovations | Process to recover alkali from a metal oxide/hydroxide containing material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4224289A (en) * | 1978-04-20 | 1980-09-23 | Australian Paper Manufacturers Limited | Alkali regeneration process |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2366177A (en) * | 1941-11-15 | 1945-01-02 | Thomas P Campbell | Treatment of titaniferous ores |
GB789104A (en) * | 1955-12-07 | 1958-01-15 | Blancs De Zinc De La Mediterra | Improvements in or relating to the production of alkali metal titanates |
-
1972
- 1972-11-10 GB GB5212672A patent/GB1407276A/en not_active Expired
- 1972-12-11 FR FR7244029A patent/FR2209718B1/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1983003407A1 (en) * | 1982-03-25 | 1983-10-13 | Nguyen, Kien, Loi | Alkali regeneration process |
WO2020220117A1 (en) * | 2019-04-29 | 2020-11-05 | Fpinnovations | Process to recover alkali from a metal oxide/hydroxide containing material |
Also Published As
Publication number | Publication date |
---|---|
DE2257463B2 (en) | 1977-06-02 |
DE2257463A1 (en) | 1975-06-19 |
FR2209718A1 (en) | 1974-07-05 |
FR2209718B1 (en) | 1976-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |