CN1100383A - Liquid phase conversion process for producing potassium sulfate with sulfuric acid and potassium chloride - Google Patents
Liquid phase conversion process for producing potassium sulfate with sulfuric acid and potassium chloride Download PDFInfo
- Publication number
- CN1100383A CN1100383A CN 93116965 CN93116965A CN1100383A CN 1100383 A CN1100383 A CN 1100383A CN 93116965 CN93116965 CN 93116965 CN 93116965 A CN93116965 A CN 93116965A CN 1100383 A CN1100383 A CN 1100383A
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- China
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- sulfuric acid
- liquid phase
- reaction
- potassium chloride
- potassium
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Abstract
Liquid phase coversion process is that sulfuric acid and potassium chloride react first in solution, and after cooling crystallization, washing, dewatering, neutralization and desiccation, potassium sulphate product is produced. The present invention adopts mild reaction conditions so as to avoid the corrosion of strong corrosive medium to production equipment. Common glass-lining reaction still can fulfil the requirement, and this reduces prodn cost.
Description
The invention belongs to the invention of a production technique in the chemical industry technical field of inorganic salt production.Vitriolate of tartar is mainly used in agricultural and makes potash fertilizer (fertilizer special for tobacco), is the basic raw material of making sylvite in chemical industry, also is used for industry such as glass, dyestuff, spices.
Before the present invention did not make, the processing method of producing vitriolate of tartar both at home and abroad had: alunite reduction heat solution, leonite method, extra large halogen extraction method, saltcake Repone K method and sulfuric acid Repone K method.But the technology that the production vitriolate of tartar mainly adopts is sulfuric acid, Repone K method, and its producing and manufacturing technique is: the vitriol oil is mixed placing high-temperature salt furnace with Repone K, roast under the temperature about 700 ℃ reacts the Repone K and the vitriol oil, generates vitriolate of tartar.The shortcoming of this production technique is: reaction conditions requires harsh; The production unit seriously corroded; The construction one-time investment is excessive.
In order to remedy the defective in this production technique, seek a kind of sulfuric acid and Repone K of making and under the reaction conditions of gentleness, to generate vitriolate of tartar and the production technique little, and made the invention production unit corrodibility.
Accompanying drawing is sulfuric acid, potassium chloride liquid phase inversion process technological process of production synoptic diagram.
Production technology of the present invention is (accompanying drawing): take sulfuric acid and potassium chloride as raw material, soluble in water, place in the conversion reactor (1) with electric mixer, after reaction generates potassium sulfate under 80 ℃～150 ℃ the temperature, in conversion reactor (1) through the cooling, crystallization, put into washing dehydration device (2) through washing, separating and dehydrating, place and drier (3) again, namely making potassium oxide content after the neutralization drying is 45 The potassium sulfate finished product that % is above. Can return the middle batching of conversion reactor (1) by isolated mother liquor (5) in the washing dehydration device (2) recycles. The byproduct hydrogen chloride gas that reaction generates generates hydrochloric acid after condenser (4) condensation, can be as the product sale or for the production of other products. Key of the present invention is: the batching mol ratio of sulfuric acid and potassium chloride; Reacting material concentration; Reaction temperature and reaction time. The mol ratio of sulfuric acid and potassium chloride: should be between 1: 0.8～1.2, take as far as possible near 1: 1 as best. Reacting material concentration: reacting material concentration is with concentration meter for sulfuric acid, can be between 15%～98% scope, characteristics of the present invention are, material concentration is in lower bound when the reaction beginning, carrying out along with reaction, water in the reaction system and the evaporation of the hydrogen chloride of generation, material concentration progressively improves, until reaction mass is the stiff shape. For the hydrogen chloride that is conducive to react generation breaks away from reaction system with water vapour, can directly pass into the mist of steam or steam and air in the conversion reactor (1). Reaction temperature should be controlled between 80 ℃～150 ℃, and the solution boiling is as best in the reaction system to keep, and the hydrogen chloride gas that generates in order to reaction like this overflows. Reaction time is 1～5 hour, reaction end of a period reaction mass is the stiff shape, should add the water of 1～5 times of potassium chloride weight and add thermal agitation after reaction is finished, then cooling, crystallization in conversion reactor (1), put into washing dehydration device (2) dehydration and separate, finally make finished product sulfuric acid potassium.
The present invention is owing to the reaction conditions of having avoided strong corrosive media and harshness, thereby common glassed steel reaction vessels can satisfy the needs of working condition.
The inventor once was such embodiment: at first according to process flow sheet shown in the accompanying drawing production equipment that one cover has dwindled has been installed, has been adopted the 500ml enamelled vessel that has an electric mixer as conversion reactor (1), carried out five cyclical operations.Ingredient proportion for the first time: water 100ml, sulfuric acid 50ml(proportion 1.84 gram/cm
3), agricultural potassium chloride 140 gram (K
2O content 60%).For the second time to the 5th ingredient proportion: mother liquor 250ml, sulfuric acid 28ml, agricultural potassium chloride 80 grams, reaction times is 2 hours, 110 ℃～120 ℃ of temperature of reaction, each reaction finishes and adds 100ml water and stir 5 minutes postcooling to 30 ℃, vacuum filtration also adds the little water washing leaching cake, and average each circulation can make vitriolate of tartar finished product 89 grams, five finished product composite samples tests, potassium oxide content is 51.0% as a result, and acidity (with sulphur acid meter) 1.70%, chlorion are (with Cl
-Meter) 0.43%, reach national product standard top grade product quality index.
Claims (3)
1, a kind of is the processing method of raw material production vitriolate of tartar with sulfuric acid and Repone K, it is characterized in that: sulfuric acid and Repone K transform with liquid phase reaction and generate vitriolate of tartar, and the temperature of reaction system is controlled between 80 ℃～150 ℃, and the reaction times is 1～5 hour.
2, production technique according to claim 1 is characterized in that: the batching mol ratio of sulfuric acid and Repone K is between 1: 0.8～1.2, being the best near 1: 1.
3, production technique according to claim 2 is characterized in that: the material concentration that sulfuric acid and Repone K react in solution (with sulphur acid meter) should be between 15%～98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93116965 CN1100383A (en) | 1993-09-15 | 1993-09-15 | Liquid phase conversion process for producing potassium sulfate with sulfuric acid and potassium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93116965 CN1100383A (en) | 1993-09-15 | 1993-09-15 | Liquid phase conversion process for producing potassium sulfate with sulfuric acid and potassium chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1100383A true CN1100383A (en) | 1995-03-22 |
Family
ID=4991784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93116965 Withdrawn CN1100383A (en) | 1993-09-15 | 1993-09-15 | Liquid phase conversion process for producing potassium sulfate with sulfuric acid and potassium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1100383A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052962C (en) * | 1996-12-13 | 2000-05-31 | 宋康尧 | New method for producing potassium sulfate |
| CN104528768A (en) * | 2014-12-30 | 2015-04-22 | 陕西杨凌一丰农业设备科技有限公司 | Potassium sulphate reaction furnace |
| CN107032834A (en) * | 2017-06-15 | 2017-08-11 | 开封大学 | The technique that liquid phase mortar gunite method produces potassium sulfate |
-
1993
- 1993-09-15 CN CN 93116965 patent/CN1100383A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052962C (en) * | 1996-12-13 | 2000-05-31 | 宋康尧 | New method for producing potassium sulfate |
| CN104528768A (en) * | 2014-12-30 | 2015-04-22 | 陕西杨凌一丰农业设备科技有限公司 | Potassium sulphate reaction furnace |
| CN107032834A (en) * | 2017-06-15 | 2017-08-11 | 开封大学 | The technique that liquid phase mortar gunite method produces potassium sulfate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C03 | Withdrawal of patent application (patent law 1993) | ||
| WW01 | Invention patent application withdrawn after publication |