CN101481124A - Production process of potassium carbonate - Google Patents
Production process of potassium carbonate Download PDFInfo
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- CN101481124A CN101481124A CNA2008101641534A CN200810164153A CN101481124A CN 101481124 A CN101481124 A CN 101481124A CN A2008101641534 A CNA2008101641534 A CN A2008101641534A CN 200810164153 A CN200810164153 A CN 200810164153A CN 101481124 A CN101481124 A CN 101481124A
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- salt
- wormwood
- bicarbonate
- saleratus
- ammonia
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Abstract
The invention relates to a potassic carbonate, in particular to a technique for producing potassium carbonate. The method comprises the following steps: evaporating a mixed solution at a low temperature and pressure after the ion exchange process is performed to ammonium hydrogen carbonate and potassium chloride so that only a small amount of potassium bicarbonate is converted to potassium carbonate. Therefore, CO2 given out by decomposing ammonium hydrogen carbonate in the pressure reducing and evaporating process can realize the carbonization of the potassium carbonate, thereby the carbonization process is saved, the low temperature self-carbonizing production technique is realized, the energy consumption is reduced, the coal consumption is reduced to 1.3 tons from 1.8 tons in the traditional technique, the electricity consumption is reduced to 270KW/h from 450KW/h, the consumption of the main materials of the potassium chloride and the ammonium hydrogen carbonate per ton are reduced to 1.153 and 1.335 tons from 1.25 and 1.60 tons respectively, and the corrosion of the equipment is reduced.
Description
Technical field
The present invention relates to a kind of carbonate of potassium, relate in particular to a kind of production technique of salt of wormwood.
Background technology
At present, produce salt of wormwood (K
2CO
3) method mainly contain electrolytic process and ion-exchange-resin process.Though adopt the quality product height, pollution-free of electrolytic process preparation, its equipment requirements height, power consumption is big, cost is high.Publication number provides a kind of technology and equipment for preparing salt of wormwood for the Chinese invention patent application of CN1092379, the powder in salt of wormwood calcined material or hydrate preparation facilities or abrasive add crystallization and solids constituent from after wet separating salt and mix.Have or do not have mixture round-robin agitator and be installed between the solid classification of separating salt and calcined material and the hydrate preparation facilities inlet.During the preparation of potash water compound, part calcined material powder mixes with the mixture of separating salt or powder and separating salt.The potash water compound prepares with agitator, saves the heat drying device of preparation potash water compound.Publication number provides the preparation method of another kind of salt of wormwood for the Chinese invention patent application of CN101186317, to fire matchmaker's stack gas or lime-kiln gas feeds in the ammoniacal liquor after the water washing dedust desulfurization, make ammonium bicarbonate soln, add nickel hydroxide and Repone K, feed the ammonia precipitation separation and obtain the salt of wormwood ammonia soln, transfer to container again, pressurization is led to ammonia or is added liquefied ammonia, the solution layering, the upper strata is a supersaturation ammoniacal liquor, and lower floor is that saturated potassium carbonate contains ammonia solution, obtains salt of wormwood with extraction process and contains the ammonia saturated solution, salt of wormwood is contained the ammonia solution heating evaporation, and evaporate to dryness got the salt of wormwood product after the deamination after-filtration fell remaining nickelous carbonate.Traditional method for producing potassium carbonate by ion exchange is to adopt Repone K and bicarbonate of ammonia as raw material, makes finished product through twice evaporation, carbonization, crystallization, separation, washing, calcining.
Summary of the invention
It is low that the present invention has mainly provided a kind of energy consumption, saved carbonation process, little to equipment corrosion, the simple salt of wormwood production technique of processing step; Solve existing in prior technology energy consumption height, the technical problem that operation is many.
The present invention also provides the recycling of a kind of energy simultaneously, and environmental pollution is little, saves the salt of wormwood production technique of the energy; Solve the contaminate environment that exists in the prior art, the technical problem that wastes energy.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of production technique of salt of wormwood is characterized in that may further comprise the steps:
1. adopting storng-acid cation exchange resin is regenerator with Repone K, does eluent with bicarbonate of ammonia, utilizes ion exchange method to obtain the mixing solutions and the ammonium chloride solution of saleratus and bicarbonate of ammonia;
2. mixing solutions is entered evaporation from carbonation process under the decompression cold condition, negative pressure is 0.6Mpa～0.8Mpa during evaporation, and vaporization temperature is 75 ℃～90 ℃, and bicarbonate of ammonia decomposes the CO that discharges
2To carry out carbonizing treatment by the salt of wormwood that saleratus decomposes out, be converted into saleratus;
3. the potassium bicarbonate solution that carbonization obtains through above-mentioned steps is purified through the evaporative crystallization operation;
4. obtain the saleratus solid through the concentrated solution behind the evaporative crystallization through solid-liquid separation, obtain finished product salt of wormwood through calcining.
In the technology of the present invention, the decompression cold condition that adopts when mixing solutions evaporates is because the decomposition temperature of bicarbonate of ammonia is lower than saleratus, in decompression low-temperature evaporation process, have only a spot of saleratus to be converted into salt of wormwood, bicarbonate of ammonia decomposes the CO that emits in the reduction vaporization process
2Can realize the carbonization of salt of wormwood fully, thereby removed original ion exchange resin method from and prepared carbonization process in the technological process of salt of wormwood, traditional technology all is to adopt the evaporation technology of normal temperature and pressure, needs to carry out carbonizing treatment and be converted into salt of wormwood after saleratus decomposes.Thereby this technology is simple processing step, the temperature of evaporation reduces, coal consumption is dropped to 1.3 tons by 1.8 tons of old technology, and power consumption drops to 270KW/h from 450KW/h, and the ton product consumption of main raw material Repone K and bicarbonate of ammonia is respectively 1.25 and 1.60 and drops to 1.153 and 1.335.Because vaporization temperature reduces, also reduced corrosion simultaneously to equipment.
As preferably, after the ammonium chloride solution that described step obtains in is 1. purified through evaporative crystallization, obtain finished product ammonium chloride through solid-liquid separation again.After Repone K and the ion-exchange of bicarbonate of ammonia process, its reaction formula is as follows: (R is a molecular resin skeleton part in the formula)
Obtain ammonium chloride solution through ion-exchange, prepared finished product ammonium chloride then, improved utilization ratio of raw materials, saved the energy.
As preferably, described step is back to by pipeline in the ammonium bicarbonate soln of step in 1. through pervaporation ammoniated distilled water after carbonization in 2..To recycle through the contain ammonia distilled water of pervaporation after carbonization, save the energy, reduce pollution, make energy recycling.
As preferably, described step is finished product through the saleratus solid after the solid-liquid separation through calcining in 4., and saleratus mother liquor wherein is back to step evaporation 2. in carbonization solution.Through the centrifugation of the solid-liquid solid of having purified, the salt of wormwood that liquid contains can repeat evaporation again from carburising step, and the recycling that moves in circles has not only improved output and also saved cost.
As preferably, described ammonium chloride solution is through behind the evaporative crystallization, and wherein ammoniated distilled water is through after the ion-exchange, and ammonium chloride is recovered in the ammonium chloride solution that 1. step produce, and pure water is back in the ion exchanged soln.Ammoniated distilled water has improved utilization ratio and output through after the ion-exchange ammonia chloride being reclaimed, and pure water is back to bicarbonate of ammonia and Repone K carries out diluting dissolving in the container of ion-exchange.
As preferably, what described ion exchange method adopted is 732 type storng-acid cation exchange resins.
Therefore, the preparation method of salt of wormwood of the present invention, have following characteristics: after bicarbonate of ammonia and the ion-exchange of Repone K process, adopt decompression low temperature to carry out evaporization process to mixing solutions, thereby make and have only a spot of saleratus to be converted into salt of wormwood, therefore bicarbonate of ammonia decomposes the CO that emits in the reduction vaporization process
2Fully realize the carbonization of salt of wormwood, thereby removed carbonization process from, realized that low temperature is from process for carbonization production, reduced energy consumption, coal consumption drops to 1.3 tons by 1.8 tons of old technology, power consumption drops to 270KW/h from 450KW/h, and the ton product consumption of main raw material Repone K and bicarbonate of ammonia is respectively 1.25 and 1.60 and drops to 1.153 and 1.335, has reduced the corrosion to equipment simultaneously.Carry out recycle through the ammonia distilled water that contains of pervaporation behind carbonation process, improved rate of energy and output, reduced cost.
Description of drawings:
Fig. 1 is an a kind of salt of wormwood preparation method's of the present invention schema.
Embodiment:
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
As shown in Figure 1, a kind of salt of wormwood preparation method, adopting 732 type storng-acid cation exchange resins is regenerator with Repone K, does eluent with bicarbonate of ammonia, utilizes ion exchange method to obtain the mixing solutions and the ammonium chloride solution of saleratus and bicarbonate of ammonia.
At negative pressure 0.7Mpa, vaporization temperature is to evaporate under 85 ℃ the condition, because the decomposition temperature of bicarbonate of ammonia is lower than saleratus, has only a spot of saleratus to be converted into salt of wormwood in evaporative process with mixed diluting solution, and the CO that bicarbonate of ammonia discharges
2Can realize the carbonization process of salt of wormwood fully, finish evaporation from carbonation process, the contain ammonia distilled water of evaporation after carbonization is back in the ammonium bicarbonate soln and recycles again, carry out crystallisation by cooling through the solution of pervaporation behind carbonation process at 40 ℃, then with the solid-liquid centrifugation, the mother liquor that centrifugation is come out is back in the solution of evaporation in carburising step, carries out recycle, and the salt of wormwood of separating is calcined through 270 ℃ and obtain finished product salt of wormwood.
The ammonium chloride solution that is obtained by ion exchange method carries out ion-exchange through behind the evaporative crystallization with ammoniated distilled water at 60 ℃～90 ℃, resin is the exchanges of 732 type highly acidic cations, the ammonium chloride solution that obtains is back to and repeats the circulation recovery in the ammonium chloride solution, and the pure water that ammoniated distilled water ion-exchange obtains is back to bicarbonate of ammonia and Repone K carries out in the solution of ion-exchange.Carry out the centrifugation of solid-liquid through evaporative crystallization post chlorization ammonium solution, the mother liquor that centrifugation is come out is back in the evaporative crystallization step, carry out recycle, and the solid of separating is a finished product ammonium chloride.
Embodiment 2:
As shown in Figure 1, a kind of salt of wormwood preparation method, adopting 732 type storng-acid cation exchange resins is regenerator with Repone K, does eluent with bicarbonate of ammonia, utilizes ion exchange method to obtain the mixing solutions and the ammonium chloride solution of saleratus and bicarbonate of ammonia.At negative pressure 0.6Mpa, vaporization temperature is to evaporate under 75 ℃ the condition, because the decomposition temperature of bicarbonate of ammonia is lower than saleratus, has only a spot of saleratus to be converted into salt of wormwood in evaporative process with mixing solutions, and the CO that bicarbonate of ammonia discharges
2Can realize the carbonization process of salt of wormwood fully, finish evaporation from carbonation process.All the other and embodiment 1 are together.
Embodiment 3:
As shown in Figure 1, a kind of salt of wormwood preparation method, adopting 732 type storng-acid cation exchange resins is regenerator with Repone K, does eluent with bicarbonate of ammonia, utilizes ion exchange method to obtain the mixing solutions and the ammonium chloride solution of saleratus and bicarbonate of ammonia.At negative pressure 0.8Mpa, vaporization temperature is to evaporate under 90 ℃ the condition, because the decomposition temperature of bicarbonate of ammonia is lower than saleratus, has only a spot of saleratus to be converted into salt of wormwood in evaporative process with mixing solutions, and the CO that bicarbonate of ammonia discharges
2Can realize the carbonization process of salt of wormwood fully, finish evaporation from carbonation process.All the other and embodiment 1 are together.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. the production technique of a salt of wormwood is characterized in that may further comprise the steps:
1. adopting strong acid ion exchange resin is regenerator with Repone K, does eluent with bicarbonate of ammonia, utilizes ion exchange method to obtain the mixed diluting solution and the ammonium chloride solution of saleratus and bicarbonate of ammonia;
2. mixing solutions is entered evaporation from carbonation process under the decompression cold condition, negative pressure is 0.6Mpa～0.8Mpa during evaporation, and vaporization temperature is 75 ℃～90 ℃, and bicarbonate of ammonia decomposes the CO that discharges
2To carry out carbonizing treatment by the salt of wormwood that saleratus decomposes out, be converted into saleratus;
3. the potassium bicarbonate solution that carbonization obtains through above-mentioned steps is purified through the evaporative crystallization operation;
4. obtain the saleratus solid through the concentrated solution behind the evaporative crystallization through solid-liquid separation, obtain finished product salt of wormwood through calcining.
2. the production technique of a kind of salt of wormwood according to claim 1 is characterized in that: after the ammonium chloride solution that described step obtains in is 1. purified through evaporative crystallization, obtain finished product ammonium chloride through solid-liquid separation again.
3. the production technique of a kind of salt of wormwood according to claim 1 is characterized in that: described step is back to by pipeline in the ammonium bicarbonate soln of step in 1. through pervaporation ammoniated distilled water after carbonization in 2..
4. the production technique of a kind of salt of wormwood according to claim 1 is characterized in that: be finished product through the saleratus in the solid-liquid separation is fixing through calcining in the described step, saleratus mother liquor wherein is back to step evaporation 2. in carbonization solution.
5. the production technique of a kind of salt of wormwood according to claim 2, it is characterized in that: described ammonium chloride solution is through behind the evaporative crystallization, wherein ammoniated distilled water is through after the ion-exchange, ammonium chloride is recovered in the ammonium chloride solution that 1. step produce, and pure water is back in the ion exchanged soln of step in 1..
6. the production technique of a kind of salt of wormwood according to claim 1 is characterized in that: what described ion exchange method adopted is 732 type storng-acid cation exchange resins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101641534A CN101481124A (en) | 2008-12-22 | 2008-12-22 | Production process of potassium carbonate |
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|---|---|---|---|
| CNA2008101641534A CN101481124A (en) | 2008-12-22 | 2008-12-22 | Production process of potassium carbonate |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515210A (en) * | 2011-10-27 | 2012-06-27 | 浙江大洋化工股份有限公司 | Method for producing potassium bicarbonate through self-carbonization multiple-effect cross flow continues evaporation crystallization |
| CN103708507A (en) * | 2013-12-26 | 2014-04-09 | 国药集团化学试剂有限公司 | Preparation method of food-grade potassium carbonate |
| WO2016131389A1 (en) * | 2015-02-16 | 2016-08-25 | 秦才东 | Method and device for exchanging and concentrating ion in solution |
| CN105905928A (en) * | 2016-05-03 | 2016-08-31 | 四川福思达生物技术开发有限责任公司 | Processing process of waste liquid in preparation process of 3, 6-dichloro salicylic acid |
| CN106006682A (en) * | 2016-05-16 | 2016-10-12 | 北京鑫佰利科技发展有限公司 | Method for preparing potassium carbonate through film method |
| CN107140660A (en) * | 2017-07-20 | 2017-09-08 | 台山市化工厂有限公司 | A kind of preparation method of potassium carbonate |
| CN107879922A (en) * | 2016-09-30 | 2018-04-06 | 江苏优嘉植物保护有限公司 | A kind of circulation utilization method of the waste water containing KCl |
| CN109437247A (en) * | 2018-12-21 | 2019-03-08 | 滑县大潮林物产有限责任公司 | Potassium carbonate recovery method in the production of super capacitor carbon |
| CN110104669A (en) * | 2019-06-06 | 2019-08-09 | 长沙紫宸科技开发有限公司 | A method of calcium bicarbonate is prepared with carbide slag |
| CN115448332A (en) * | 2022-11-11 | 2022-12-09 | 山东海化集团有限公司 | Method for preparing potassium carbonate by continuous ion exchange of fixed bed |
| CN115924938A (en) * | 2022-12-30 | 2023-04-07 | 华融化学股份有限公司 | Production process of food-grade potassium carbonate and food-grade potassium bicarbonate |
-
2008
- 2008-12-22 CN CNA2008101641534A patent/CN101481124A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515210A (en) * | 2011-10-27 | 2012-06-27 | 浙江大洋化工股份有限公司 | Method for producing potassium bicarbonate through self-carbonization multiple-effect cross flow continues evaporation crystallization |
| CN103708507A (en) * | 2013-12-26 | 2014-04-09 | 国药集团化学试剂有限公司 | Preparation method of food-grade potassium carbonate |
| CN103708507B (en) * | 2013-12-26 | 2016-03-16 | 国药集团化学试剂有限公司 | A kind of preparation method of food-grade potassium carbonate |
| WO2016131389A1 (en) * | 2015-02-16 | 2016-08-25 | 秦才东 | Method and device for exchanging and concentrating ion in solution |
| CN105905928A (en) * | 2016-05-03 | 2016-08-31 | 四川福思达生物技术开发有限责任公司 | Processing process of waste liquid in preparation process of 3, 6-dichloro salicylic acid |
| CN106006682B (en) * | 2016-05-16 | 2017-09-01 | 北京鑫佰利科技发展有限公司 | The method that embrane method prepares potassium carbonate |
| CN106006682A (en) * | 2016-05-16 | 2016-10-12 | 北京鑫佰利科技发展有限公司 | Method for preparing potassium carbonate through film method |
| CN107879922A (en) * | 2016-09-30 | 2018-04-06 | 江苏优嘉植物保护有限公司 | A kind of circulation utilization method of the waste water containing KCl |
| CN107140660A (en) * | 2017-07-20 | 2017-09-08 | 台山市化工厂有限公司 | A kind of preparation method of potassium carbonate |
| CN107140660B (en) * | 2017-07-20 | 2018-05-04 | 台山市化工厂有限公司 | A kind of preparation method of potassium carbonate |
| CN109437247A (en) * | 2018-12-21 | 2019-03-08 | 滑县大潮林物产有限责任公司 | Potassium carbonate recovery method in the production of super capacitor carbon |
| CN110104669A (en) * | 2019-06-06 | 2019-08-09 | 长沙紫宸科技开发有限公司 | A method of calcium bicarbonate is prepared with carbide slag |
| CN115448332A (en) * | 2022-11-11 | 2022-12-09 | 山东海化集团有限公司 | Method for preparing potassium carbonate by continuous ion exchange of fixed bed |
| CN115448332B (en) * | 2022-11-11 | 2023-03-21 | 山东海化集团有限公司 | Method for preparing potassium carbonate by continuous ion exchange of fixed bed |
| CN115924938A (en) * | 2022-12-30 | 2023-04-07 | 华融化学股份有限公司 | Production process of food-grade potassium carbonate and food-grade potassium bicarbonate |
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