RU1781171C - Process for producing decahydrate of sodium carbonate - Google Patents
Process for producing decahydrate of sodium carbonateInfo
- Publication number
- RU1781171C RU1781171C SU904842213A SU4842213A RU1781171C RU 1781171 C RU1781171 C RU 1781171C SU 904842213 A SU904842213 A SU 904842213A SU 4842213 A SU4842213 A SU 4842213A RU 1781171 C RU1781171 C RU 1781171C
- Authority
- RU
- Russia
- Prior art keywords
- sodium carbonate
- decahydrate
- water
- mixture
- product
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/35—Varying the content of water of crystallisation or the specific gravity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/22—Purification
- C01D7/24—Crystallisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Saccharide Compounds (AREA)
Abstract
Сущность: исходное сырье - отход производства капролактама состава, мае. %: Na2COs43,0; NaCI 13,0; №2804 43,5; NaOH 0,5. Воду смешивают с отходом при отношении 1,6 при 100°С. Полученную смесь охлаж- дают до 0°С, отдел ют продукт. Выход продукта 93,2%, примеси 6,8%.Essence: feedstock - a waste product of caprolactam composition, May. %: Na2COs43.0; NaCl 13.0; No. 2804 43.5; NaOH 0.5. Water is mixed with waste at a ratio of 1.6 at 100 ° C. The resulting mixture was cooled to 0 ° C, and the product was separated. The product yield of 93.2%, impurities 6.8%.
Description
Изобретение относитс к области неорганической химии, в частности, к способу получени карбонатов щелочных металлов, содержащих кристаллизационную воду и может быть использовано в качестве компонента моющих и чист щих средств.The invention relates to the field of inorganic chemistry, in particular, to a method for producing alkali metal carbonates containing crystallization water and can be used as a component of detergents and cleaners.
Известен технический метод получени декагидрата NaaCOa ЮН20 (1). Метод заключаетс в перекристаллизации безводной соды и воды. Недостатком этого способа вл етс то, что дл получени NaaCOs ЮНаО требуютс недостаточно чистые соли, выработка которых заключаетс в добыче природных солей и их переработке по методу Сольвэ и Леблана.A technical method is known for the preparation of NaaCOa UN20 decahydrate (1). The method consists in recrystallizing anhydrous soda and water. The disadvantage of this method is that in order to produce NaaCOs of UNaO, insufficiently pure salts are required, the production of which consists in the extraction of natural salts and their processing according to the Solve and Leblanc method.
Целью предложенного изобретени вл етс разработка упрощенного способа получени соды в виде декагидрата ЫааСОз 10Н20 из отходов химических комбинатов.The aim of the invention is the development of a simplified method for the production of soda in the form of NaHCO3 10H20 decahydrate from waste from chemical plants.
Сущность предлагаемого изобретени заключаетс в следующем. Отходы химических комбинатов содержат смесь безводных солей, таких как ЫааСОз - 40-43%, Na2S04 -43,6%, NaCI - 10-13%, NaOH - 1,2-2% и следы и 5Юг. Дл выделени из этой смеси карбоната натри в виде дес тиводного кристаллогадрата №2СОз ЮН20 к навеске исходной смеси добавл ют рассчитанное количество воды, достаточное дл растворени Na2COs, с учетом температуры и совместного вли ни присутствующих солей (NaCI, Na2S04), NaOH и двойной образующейс в смеси соли №2СОз №2864 на уменьшение растворимости карбоната натри . Из наших определений следует, что на 1 кг исходной смеси необходимо брать 1,164 кг воды. Смесь с водой нагревают до 100°С, отфильтровывают, фильтрат охлаждают до 0°С и выпавший кристаллогадрат №2СОз 10Н20 отдел ют фильтрацией от маточника, содержащего Na2SQ4, NaCI, NaOH, NaaCOs Пример. 116г смеси, содержащей 43,0% №2СОз. 13,0% NaCI, 43,5% Na2S04, 0,5% NaOH помещают в емкость, в которой находитс 135 мл воды. Смесь перемешивают и нагревают до температуры кипени (100°С). Затем фильтруют через нутч- фильтр. Отфильтрованный раствор охлаждают до 0°С. из раствора выпадают кристаллы. Кристаллы подсушивают до удалени влаги при 20°С и анализируют выделенное вещество. В результате получаетс The essence of the invention is as follows. Chemical plant waste contains a mixture of anhydrous salts, such as NaACO3 - 40-43%, Na2S04 -43.6%, NaCI - 10-13%, NaOH - 1.2-2% and traces and 5yr. To isolate sodium carbonate from this mixture in the form of decahydrate crystalline hydrate No. 2CO3 UN20, a calculated amount of water sufficient to dissolve Na2COs is added to the weighed sample of the starting mixture, taking into account the temperature and the combined influence of the salts present (NaCI, Na2SO4), NaOH and the double formed in mixtures of salt No. 2CO3 No. 2864 to reduce the solubility of sodium carbonate. From our definitions it follows that for 1 kg of the initial mixture it is necessary to take 1.164 kg of water. The mixture with water is heated to 100 ° C, filtered off, the filtrate is cooled to 0 ° C and the precipitated crystalline hydrate No. 2CO3 10H20 is separated by filtration from the mother liquor containing Na2SQ4, NaCI, NaOH, NaaCOs. Example. 116 g of a mixture containing 43.0% No. 2COz. 13.0% NaCI, 43.5% Na2S04, 0.5% NaOH are placed in a container containing 135 ml of water. The mixture was stirred and heated to boiling point (100 ° C). Then filtered through a suction filter. The filtered solution is cooled to 0 ° C. crystals precipitate from the solution. The crystals are dried to remove moisture at 20 ° C and the recovered material is analyzed. The result is
VI 00VI 00
XIXi
72,85 г МагСОз 10Н20, выход составл ет 93,2% при 6,8% примесей (NaCI+Na2S04).72.85 g of MagCO3 10H20, the yield is 93.2% with 6.8% of impurities (NaCI + Na2S04).
Предлагаемый способ отличаетс простотой , резким сокращением расхода энер- го- и теплоресурсов, металлоемкости и трудоемкости производства.The proposed method is characterized by simplicity, a sharp reduction in the consumption of energy and heat resources, metal consumption and the complexity of production.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU904842213A RU1781171C (en) | 1990-04-20 | 1990-04-20 | Process for producing decahydrate of sodium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU904842213A RU1781171C (en) | 1990-04-20 | 1990-04-20 | Process for producing decahydrate of sodium carbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RU1781171C true RU1781171C (en) | 1992-12-15 |
Family
ID=21522575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU904842213A RU1781171C (en) | 1990-04-20 | 1990-04-20 | Process for producing decahydrate of sodium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU1781171C (en) |
-
1990
- 1990-04-20 RU SU904842213A patent/RU1781171C/en active
Non-Patent Citations (1)
| Title |
|---|
| Lunge-Hachduch der Sode Industrie und Ihrer Nebenzwlge Taufb. Braunschweig 1909, Bd.2;s:637,Bd 3, s 115,Schreib-ch.Ztg. 15, 522,1891. Hiittner-ch. Ztg. 45, s. 916, 922. * |
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