SU81886A1 - Method for isolating alkaline lignin from black liquor - Google Patents
Method for isolating alkaline lignin from black liquorInfo
- Publication number
- SU81886A1 SU81886A1 SU403108A SU403108A SU81886A1 SU 81886 A1 SU81886 A1 SU 81886A1 SU 403108 A SU403108 A SU 403108A SU 403108 A SU403108 A SU 403108A SU 81886 A1 SU81886 A1 SU 81886A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- black liquor
- liquor
- lignin
- alkaline lignin
- isolating
- Prior art date
Links
- 229920005610 lignin Polymers 0.000 title description 12
- 238000000034 method Methods 0.000 title description 7
- 239000003546 flue gas Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compounds Of Unknown Constitution (AREA)
- Paper (AREA)
Description
При регенерации щелочи на иредири ти х, производ щих целлюлозу ио натронному или сульфатному методам, с отход щими дымовыми газами регенерационных агрегатов уноситс значительное количество безвозвратно тер емых минеральных солен.When alkali is regenerated on the food sources that produce cellulose using soda or sulphate methods, a significant amount of irreversibly lost mineral salt water is carried away with the waste flue gases of the regeneration units.
На заводах, оборудованных регенерационньгми агрегатами с револьверными печами, частичное улавливание уноса происходит во врем иронускани дымовых газов через дисковые исиарители. При регенерации щелочи в печах специально устанавливают орошаемые черным щелоком скрубберы.In factories equipped with regenerative units with revolving furnaces, partial entrainment of entrainment occurs during the ironing of flue gases through disk sources. When alkali is regenerated in furnaces, scrubbers irrigated with black liquor are specially installed.
В обоих случа х, одновременно с растворением в щелоке минеральных частиц, протекает и другой процесс - осаждение содержащегос в щелоке лигнина под воздействием углекислоты дымовых газов. Однако этот процесс остаетс незаметным: выпадаюи ее в дисковых испарител х или скрубберах небольшое количество щелочного лигнина образует тончайщую взвесь, ирактически не поддающуюс разделению путем отстаивани или фильтрации.In both cases, simultaneously with the dissolution of the mineral particles in the liquor, another process takes place — the precipitation of lignin contained in the liquor under the influence of carbon dioxide of the flue gases. However, this process remains unnoticeable: a small amount of alkaline lignin falling out of it in disk evaporators or scrubbers forms a very thin suspension, which is practically not susceptible to separation by sedimentation or filtration.
При существующих способах температура щелока после пропускани через него дымовых газов не превыплает 70-80°. Между тем, дальнейший подогрев значительно облегчает отделение частиц щелочного лигнина от жидкой фазы.With existing methods, the temperature of the liquor after passing flue gases through it does not exceed 70-80 °. Meanwhile, further heating greatly facilitates the separation of particles of alkaline lignin from the liquid phase.
На скрубберы подаетс слабый щелок. Под воздействием гор чих дымовых газов плотность его возрастает до 12-14°Вё.Weak liquor is fed to the scrubbers. Under the influence of hot flue gases, its density increases to 12–14 ° Ve.
Происход щее при этом повышение в зкости среды значительно замедл ет как выпадание лигнина, так и растворение минеральных солей . Так, PI3 щелока плотностью в 11°Вё выдел етс на 15% меньше лигнина, чем за тот же промежуток времени из щелока плотностью в 8°Вё. Дальнейщее повыщение концентрации снижает выход еще резче,The resulting increase in viscosity of the medium slows down both the loss of lignin and the dissolution of mineral salts. Thus, PI3 liquor with a density of 11 ° Weu is released 15% less lignin than during the same period of time from the liquor with a density of 8 ° Weu. A further increase in concentration reduces the yield even more
Количество вьшадающеш лигнина зависит от рН среды,The amount of lignin emitted depends on the pH of the medium,
N° 81886- 2 -N ° 81886-2 -
Исходное рН черного щелока колеблетс обычно в пределах от 10 до П. Осаждение лигнина начинаетс при рН 9,6 - 9,8. При достижении ,3 - 8,6 в осадок выпадает около 30% от всех органических веществ, содержащихс в щелоке. При промежуточных значени х рН выпадает соответственно меньще лигнина.The initial pH of the black liquor usually ranges from 10 to P. Deposition of lignin begins at pH 9.6 - 9.8. On reaching 3–8.6, about 30% of all organic substances contained in the liquor are precipitated. At intermediate values, the pH drops out correspondingly lower than the lignin.
Предлагаемый способ лишен указанных недостатков и отличаетс те.м, что черный щелок, орощающий скруббер, выводитс с температурой 95-98°, плотностью в и с ,3 - 8,6 и по охлаждении его выпавший лигнин отфильтровываетс , а щелок подвергаетс выпарке .The proposed method is devoid of these drawbacks and is different in that the black liquor, the irrigation scrubber is removed with a temperature of 95-98 °, density in and c, 3-8.6, and after cooling, the precipitated lignin is filtered off and the liquor is evaporated.
Предмет изобретени Subject invention
Способ выделени щелочного лигнина из черных щелоков одновременно с улавливанием минеральных солей, уносимых отход щими дымовыми газами в поглотительном скруббере, отличающийс тем, что черный щелок, орощающий скруббер, вывод т с температурой в 95-98°, плотностью в 10°Вё ,и с ,3 - 8,6 и по охлаждении черного щелока выпавший щелочный лигнин отфильтровывают, а щелок подают на выпарку.A method for isolating alkaline lignin from black liquor simultaneously with trapping mineral salts carried away by flue gases in an absorption scrubber, characterized in that black liquor, a watering scrubber, is extracted with a temperature of 95-98 °, a density of 10 ° Be, and , 3 - 8.6 and after cooling the black liquor, the precipitated alkaline lignin is filtered off, and the liquor is fed to the residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU403108A SU81886A1 (en) | 1949-08-19 | 1949-08-19 | Method for isolating alkaline lignin from black liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU403108A SU81886A1 (en) | 1949-08-19 | 1949-08-19 | Method for isolating alkaline lignin from black liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU81886A1 true SU81886A1 (en) | 1949-11-30 |
Family
ID=48255204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU403108A SU81886A1 (en) | 1949-08-19 | 1949-08-19 | Method for isolating alkaline lignin from black liquor |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU81886A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2564674C2 (en) * | 2010-10-15 | 2015-10-10 | ЮПМ-Кюммене Корпорейшн | Method for continuous precipitation of lignin from black liquor |
-
1949
- 1949-08-19 SU SU403108A patent/SU81886A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2564674C2 (en) * | 2010-10-15 | 2015-10-10 | ЮПМ-Кюммене Корпорейшн | Method for continuous precipitation of lignin from black liquor |
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