CN102874847B - Potassium-chloride product and preparation method thereof - Google Patents
Potassium-chloride product and preparation method thereof Download PDFInfo
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- CN102874847B CN102874847B CN201210404909.4A CN201210404909A CN102874847B CN 102874847 B CN102874847 B CN 102874847B CN 201210404909 A CN201210404909 A CN 201210404909A CN 102874847 B CN102874847 B CN 102874847B
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Abstract
The invention discloses a salt-compound product and a preparation method thereof and concretely relates to an edible potassium-chloride product and a preparation method thereof; the mass of potassium-chloride crystal particles with the granularity of more than 0.5mm in the potassium-chloride product accounts for more than 80 percent of that of the potassium-chloride product; and the average granularity of the crystal particles in the potassium-chloride product disclosed in the invention is larger, so that when potassium chloride is used for preparing edible salt, particularly low-sodium salt, the potassium-chloride crystal particles and sodium-chloride crystal particles in the edible salt are more uniformly distributed, and furthermore, the intaking amount of the potassium chloride is more uniform when people use the edible salt each time.
Description
Technical field
The present invention relates to a kind of salt compounds product and preparation method thereof, be specifically related to a kind of edible Potassium Chloride Product and preparation method thereof that can be used for.
Background technology
Repone K is a kind of inorganic salts compound, and its molecular formula is KCl, is jointly made up of potassium ion and chlorion; Repone K can be used as a kind of industrial raw material, for the manufacture of all kinds of sylvite as potassium hydroxide, potassium sulfate, saltpetre and Potcrate etc.; Repone K can also be served as one way of life articles for use, for the auxiliary added ingredients of Cardia Salt or mineral water, thereby provides a certain amount of potassium ion for human body; Repone K also can be used for preparing the diuretic(s) in medicine industry and prevents and treats the medicine of kaliopenia.
In existing Potassium Chloride Product, the mean particle size of most of potassium chloride particle is less, most for being less than 0.5mm; In the time that the mean particle size of potassium chloride particle is less than 0.5mm, in described potassium chloride particle, the granule content of granularity more than 0.5mm is just less, or almost there is no the potassium chloride particle of granularity more than 0.5mm, thereby make the mean particle size of crystal grain in Potassium Chloride Product be less than 0.5mm.When the mean particle size of Repone K crystal grain particle hour, in its Cardia Salt of preparing, the granularity of salt particle and the granularity of Repone K crystal grain just have a certain distance, thereby it is even not to cause sodium-chlor and Repone K crystal grain to distribute, cause people's content that edible Cardia Salt is taken in Repone K at every turn even not.The problems referred to above are especially easy to appear at and in potassium chloride particle, had both included granularity and be less than 0.5mm, include again the particle of granularity more than 0.5mm, and granularity are in the case of granule content more than 0.5mm is less.
The existing production technique of preparing Repone K is mainly to utilize using chloride type or the sub-magnesium type of sulfuric acid carnallitite, sylvite etc. as raw material, it is mixed with water, through heat, filter and form saturated solution, then gained saturated solution is placed in to container crystallisation by cooling, filters to obtain Potassium Chloride Product and mother liquor.The purity of the Repone K that aforesaid method is prepared generally more than 90%, the industrial salt that general factory is used.
In addition, the existing general method of preparing food-grade potassium chloride product is that the Repone K more than 90% adds water and is mixed with saturated solution by content, then add discoloring agent, arsenic removing agent and removing heavy metals agent etc. to purify medicine, be prepared into food-grade potassium chloride product through precipitation, filtration, crystallisation by cooling, separation etc., its content is generally more than 97%.
Above-mentioned two kinds of existing the most conventional methods of preparing Repone K all do not improve the step of the mean particle size of potassium chloride particle, and in the Potassium Chloride Product of preparing, the content of Repone K is at most more than 97%, and purity is lower.
Summary of the invention
In view of this, the invention provides a kind of Potassium Chloride Product, the mean particle size of its crystal grain is larger, thereby while making described Repone K for the preparation of edible salt especially Cardia Salt, potassium chloride particle and sodium chloride crystal size distribution are wherein comparatively even, and then the amount of the Repone K taken in while at every turn using edible salt of people is comparatively even.
For solving above technical problem, technical scheme of the present invention adopts a kind of Potassium Chloride Product, and in described Potassium Chloride Product, granularity is that the quality of potassium chloride particle more than 0.5mm accounts for the more than 80% of described Potassium Chloride Product quality.
Preferably, the purity of described Potassium Chloride Product is more than 97%.
Preferably, the purity of described Potassium Chloride Product is more than 99%.
Compared with existing Potassium Chloride Product, the mean particle size of Potassium Chloride Product of the present invention is larger, it is during for the preparation of edible salt especially Cardia Salt, potassium chloride particle wherein and sodium chloride crystal size distribution can be comparatively even, and then the amount of the Repone K taken in while at every turn using edible salt of people is comparatively even.
In Potassium Chloride Product of the present invention, granularity is the 80%-100% that the quality of potassium chloride particle more than 0.5mm accounts for described Potassium Chloride Product quality, the present invention adopts such scheme can make the potassium chloride particle of the more granularity of content in Potassium Chloride Product of the present invention between more than 0.5mm can reduce the deficiency of the potassium chloride particle that granularity is less, simultaneously, in Potassium Chloride Product of the present invention, the quality of the potassium chloride particle of granularity between more than 0.5mm accounts for the more than 80% of described Potassium Chloride Product quality, the present invention adopts the content of the potassium chloride particle that granularity is larger to account for the major part of Potassium Chloride Product quality of the present invention, in Potassium Chloride Product of the present invention like this, the size of crystal size is just comparatively even, more than 80% be the crystal grain of the above granularity of 0.5mm, when it is prepared into edible salt, potassium chloride particle and sodium chloride crystal size distribution are more even, the amount of absorption Repone K when people use is at every turn just comparatively even.
Further, the purity of Potassium Chloride Product of the present invention is more than 97%; The purity of Potassium Chloride Product of the present invention is preferably more than 90%, if purity is less than 90%, in Potassium Chloride Product, impurity is more, and its potassium chloride particle is just difficult for forming the larger crystal of granularity, is therefore just difficult to obtain Potassium Chloride Product of the present invention.It is more than 97% that the present invention preferably adopts the purity of described Potassium Chloride Product, when the purity of Potassium Chloride Product of the present invention is 97% when above, in gained Potassium Chloride Product, impurity is less, and the granularity of potassium chloride particle is just larger, and the content of its granularity between more than 0.5mm is also larger.Preferred, the purity of Potassium Chloride Product of the present invention is more than 99%.
In addition, the purity of Potassium Chloride Product of the present invention is higher, and its impurity is just fewer; Impurity is fewer, is just difficult for the moisture absorption, and therefore its shelf time is just longer; The too short problem of shelf time of having avoided preferably existing Potassium Chloride Product to cause because of the moisture absorption compared with higher position when the purity of Potassium Chloride Product of the present invention.
Another object of the present invention is also to provide a kind of preparation method of Potassium Chloride Product of the present invention, and the preparation method of described Potassium Chloride Product includes following steps:
A, by formation saturated solution soluble in water Repone K raw material, evaporation concentration in the time of 100 ℃-105 ℃, then adding crystal size according to the ratio of the 60%-100% of Repone K quality in saturated solution is the Repone K crystal seed of 0.3-0.6mm, forms dense slip;
B, the dense slip of gained in A step be placed in to crystallizer be cooled to 30-35 ℃ of crystallization more than 30 minutes, then by gained crystal separation in crystallizer, dryly to obtain described Potassium Chloride Product.
Preferably, the preparation method of described Potassium Chloride Product includes following steps:
A, by formation saturated solution soluble in water Repone K raw material, evaporation concentration in the time of 100 ℃-105 ℃, then adding crystal size according to the ratio of the 80%-100% of Repone K quality in saturated solution is the Repone K crystal seed of 0.5-0.6mm, forms dense slip;
B, the dense slip of gained in A step be placed in to crystallizer be cooled to 32-35 ℃ of crystallization 30-60 minute, then by gained crystal separation in crystallizer, dryly to obtain described Potassium Chloride Product.
Preferably, in described A step, Repone K raw material is technical grade Repone K or food-grade potassium chloride.
Preferably, in described A step, Repone K raw material is technical grade Repone K, described technical grade Repone K is after soluble in water, first add a certain proportion of purification medicine, after precipitation, filtration, make saturated solution, then by gained saturated solution in 100 ℃ of-105 ℃ of evaporation concentration, then adding crystal size according to the ratio of the 60%-100% of the Repone K quality in saturated solution is the Repone K crystal seed of 0.3-0.6mm, forms dense slip.
Preferably, described Repone K crystal seed is by after technical grade Repone K sub-sieve, and screen overflow is rinsed to rear gained with gained saturated solution in A step.
Preferably, in described A step, at the temperature of gained saturated solution prior to 110 ℃-115 ℃, evaporation concentration obtains supersaturated solution, then gained supersaturated solution is carried out at 100-105 ℃ to double evaporation-cooling concentrated, then adding crystal size according to the ratio of the 60%-100% of Repone K quality in supersaturated solution is the Repone K crystal seed of 0.3-0.6mm, forms dense slip.
Preferably, in described B step, crystallizer is draft tube baffle crystallizer.
Compared with prior art, the preparation method's of Potassium Chloride Product of the present invention principle is as follows:
The preparation method of Potassium Chloride Product of the present invention includes following steps:
In preparation scheme of the present invention first by formation saturated solution soluble in water Repone K raw material, and at the temperature of 100 ℃-105 ℃ evaporation concentration, thereby the crystal seed that then adds the 60%-100% of Repone K quality forms dense slip, described crystal seed is that crystal size is the Repone K crystal seed of 0.3-0.6mm; Then the present invention is placed in crystallizer by dense gained slip and is cooled to 30-35 ℃ of crystallization more than 30 minutes, by crystal separation in crystallizer, after dry Potassium Chloride Product of the present invention.
Two committed steps in the preparation method of Potassium Chloride Product of the present invention, are mainly adopted, that is:
1, in the saturated potassium chloride solution after evaporation concentration, having added a certain amount of granularity is the Repone K crystal seed of 0.3-0.6mm, and this step can impel the Repone K in saturated solution to add outside in the situation of Repone K crystal seed can crystallization go out the potassium chloride particle that granularity is larger; It is 0.3-0.6mm that the present invention adopts the crystal size of additional Repone K crystal seed, and the crystal seed of above-mentioned scope granularity can impel the granularity of the crystal grain that Repone K crystallization in saturated solution produces more than 0.5mm; It is Repone K quality 60%-100% in saturated solution that the present invention adopts the amount of additional Repone K crystal seed, described add-on can impel the amount of the potassium chloride particle of granularity more than 0.5mm that crystallization produces more better, accounts for the 80%-100% of gained Potassium Chloride Product quality.
2, the dense slip of gained is cooled to 30-35 ℃ and crystallization more than 30 minutes, and this step can impel the granularity of the potassium chloride particle that the Repone K in saturated solution separates out in the process of time delay crystallization larger.
Described in the preparation method of Potassium Chloride Product of the present invention in A step by formation saturated solution soluble in water Repone K raw material, evaporation concentration in the time of 100 ℃-105 ℃, then add the Repone K crystal seed of crystal size at 0.3-0.6mm according to the ratio of the 60%-100% of the Repone K quality in saturated solution, form dense slip;
The present invention adopts under the temperature condition of 100 ℃-105 ℃ during by saturated potassium chloride solution evaporation concentration, when vaporization temperature is too high while being greater than 105 ℃, at this moment the Repone K crystal seed adding can be dissolved in solution, impels it to form the larger potassium chloride particle of granularity thereby do not reach; And when vaporization temperature is too low while being less than 100 ℃, because evaporation of water temperature is 100 ℃, do not reach the object of evaporation concentration lower than this temperature.In view of the foregoing, the present invention's employing is 100-105 ℃ by the temperature condition of saturated solution evaporation concentration.
It is the 60%-100% of Repone K quality in saturated solution that the present invention adds the amount of Repone K crystal seed, and its granularity is 0.3mm-0.6mm; When add the amount of Repone K exceed Repone K quality in saturated solution 100% time, too much Repone K crystal seed will cause certain waste; And when add greening and amount lower than 60% time, the more difficult quality that reaches the particle that particle diameter is larger accounts for the 80%-100% of Potassium Chloride Product quality; In view of the foregoing, to add the amount of Repone K crystal seed described in adopting be the 60%-100% of Repone K quality in saturated solution in the present invention; Preferred, the present invention preferably to add the quality of Repone K crystal seed be the 80%-100% of Repone K quality in saturated solution.
In the time that the granularity of described Repone K crystal seed exceedes 0.6mm, the granularity of the potassium chloride particle that institute's crystallization goes out does not have obvious increase; When the granularity of described Repone K crystal seed is during lower than 0.3mm, the granularity of the potassium chloride particle that institute's crystallization goes out is just less; In view of the foregoing, to adopt the granularity of described Repone K crystal seed be 0.3-0.6mm in the present invention; Preferred, it is 0.5-0.6mm that the present invention preferably adopts the granularity of described Repone K crystal seed.
Same, in B step of the present invention, adopt in crystallization between 30-35 ℃ more than 30 minutes.In the present invention, adopting Tc is between 30-35 ℃, and in said temperature interval, the granularity of the potassium chloride particle that institute of the present invention crystallization goes out is larger; Preferred, temperature range when crystallization of the present invention is preferably 32-35 ℃.
Crystallization time of the present invention adopts more than 30 minutes, but for reduced cost and enhance productivity, it is 30-60 minute that the present invention preferably adopts crystallization time.
Further, preferably to adopt Repone K raw material in described A step be technical grade Repone K or food-grade potassium chloride to the preparation method of Potassium Chloride Product of the present invention.Repone K raw material of the present invention is the more than 90% Repone K raw material of KCE content preferably, utilizes like this in the Potassium Chloride Product that preparation method of the present invention obtains impurity just less, thereby more easily forms the potassium chloride particle that granularity is larger.Repone K raw material of the present invention can be more than 90% Repone K of content for technical grade Repone K, can also use food-grade potassium chloride is more than 97% Repone K of content, is no matter above-mentionedly anyly all can prepare described Potassium Chloride Product by preparation method of the present invention.
Further, it is technical grade Repone K that the preparation method of Potassium Chloride Product of the present invention preferably adopts Repone K raw material in described A step, after described technical grade Repone K is soluble in water, first add a certain proportion of purification medicine, after precipitation, filtration, make saturated solution, then by gained saturated solution in 100 ℃ of-105 ℃ of evaporation concentration, then adding crystal size according to the ratio of the 60%-100% of the Repone K quality in saturated solution is the Repone K crystal seed of 0.3-0.6mm, forms dense slip.
In the time that Repone K raw material of the present invention is technical grade Repone K, because its KCE content is more than 90%, in order further to improve the purity of obtained Potassium Chloride Product, thereby the granularity of crystal grain and content thereof in raising Potassium Chloride Product, the present invention is preferably by after soluble in water technical grade Repone K, first add purification medicine, thus the preferred implementation of remove portion impurity.
Purification medicine of the present invention can be existing for technical grade Repone K being prepared into any required removal of impurities medicine of food grade or pharmaceutical grade Repone K, comprises discoloring agent, arsenic removing agent and removing heavy metals agent etc.
Further, the preparation method of Potassium Chloride Product of the present invention preferably adopts described Repone K crystal seed for by after industrial potassium chloride sub-sieve, and screen overflow is rinsed to rear gained with gained saturated solution in A step.Repone K crystal seed of the present invention, except being the Repone K crystal seed that existing granularity is larger, can also be by after Repone K raw material is industrial potassium chloride sub-sieve, then saturated solution after filtering with gained in A step rinses gained after screen overflow; The above-mentioned method of preparing Repone K crystal seed is more easy to operate, and can control cost preferably.
Further, the preparation method of Potassium Chloride Product of the present invention preferably adopts in described A step evaporation concentration at the temperature of gained saturated solution prior to 110 ℃-115 ℃ to obtain supersaturated solution, then gained supersaturated solution is carried out at 100-105 ℃ to double evaporation-cooling concentrated, then adding crystal size according to the ratio of the 60%-100% of Repone K quality in supersaturated solution is the Repone K crystal seed of 0.3-0.6mm, forms dense slip.The present invention preferably adopts the mode of in described A step, gained saturated solution being carried out to two effect evaporations, adopts evaporation concentration saturated solution at the temperature prior to 110 ℃-115 ℃, and then at 100-105 ℃, carries out the concentrated mode of double evaporation-cooling; The purity of the prepared Potassium Chloride Product of above-mentioned preferred implementation is higher, and gained KCE content is higher, thereby the granularity of gained potassium chloride particle is larger.Preferred, it is in the situation of technical grade Repone K that the mode of above-mentioned two effect evaporations is particularly useful for working as Repone K raw material, like this can also be further cost-saving.
Further, preferably to adopt crystallizer in described B step be draft tube baffle crystallizer to the preparation method of Potassium Chloride Product of the present invention.The present invention preferably adopts the mode that in described B step, crystallizer is draft tube baffle crystallizer can realize the mode of continuous crystallisation, thereby increases production efficiency.
Embodiment
In order to make those skilled in the art understand better technical scheme of the present invention, below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
A, by formation saturated solution soluble in water food-grade potassium chloride, in 105 ℃ of evaporation concentration for some time, then adding crystal size according to 100% ratio of the Repone K quality in saturated solution is the Repone K crystal seed of 0.6mm, forms dense slip;
B, the dense slip of gained in A step is placed in to common crystallizer is cooled to 35 ℃ of crystallizations 5 hours, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 1 in crystallizer.
Embodiment 2
A, by formation saturated solution soluble in water food-grade potassium chloride, in 100 ℃ of evaporation concentration for some time, then adding crystal size according to 100% ratio of the Repone K quality in saturated solution is the Repone K crystal seed of 0.6mm, forms dense slip;
B, the dense slip of gained in A step is placed in to common crystallizer is cooled to 35 ℃ of crystallizations 60 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 2 in crystallizer.
Embodiment 3
A, by formation saturated solution soluble in water food-grade potassium chloride, in 100 ℃ of evaporation concentration for some time, then adding crystal size according to 60% ratio of the Repone K quality in saturated solution is the Repone K crystal seed of 0.5mm, forms dense slip;
B, the dense slip of gained in A step is placed in to common crystallizer is cooled to 30 ℃ of crystallizations 30 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 3 in crystallizer.
Embodiment 4
A, by formation saturated solution soluble in water technical grade Repone K, in 100 ℃ of evaporation concentration for some time, then adding crystal size according to 60% ratio of the Repone K quality in saturated solution is the Repone K crystal seed of 0.3mm, forms dense slip;
B, the dense slip of gained in A step is placed in to common crystallizer is cooled to 30 ℃ of crystallizations 50 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 4 in crystallizer.
Embodiment 5
A, by formation saturated solution soluble in water technical grade Repone K, in 105 ℃ of evaporation concentration for some time, then adding crystal size according to 80% ratio of the Repone K quality in saturated solution is the Repone K crystal seed of 0.5mm, forms dense slip;
B, the dense slip of gained in A step is placed in to draft tube baffle crystallizer is cooled to 32 ℃ of crystallizations 2 hours, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 5 in draft tube baffle crystallizer.
Embodiment 6
A, by soluble in water technical grade Repone K, first add a certain proportion of discoloring agent, arsenic removing agent and removing heavy metals agent, through precipitation, filter after make saturated solution; Then by gained saturated solution in 105 ℃ of evaporation concentration for some time, then adding crystal size according to 80% ratio of the Repone K quality in saturated solution is the Repone K crystal seed of 0.5mm, forms dense slip;
B, the dense slip of gained in A step is placed in to draft tube baffle crystallizer is cooled to 32 ℃ of crystallizations 2 hours, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 6 in draft tube baffle crystallizer.
Embodiment 7
A, first add a certain proportion of discoloring agent, arsenic removing agent and removing heavy metals agent by soluble in water technical grade Repone K, make saturated solution through precipitation, after filtering; Then by gained saturated solution, at the temperature prior to 110 ℃, evaporation concentration obtains supersaturated solution, again by gained supersaturated solution in 105 ℃ of evaporation concentration for some time, then adding crystal size according to 100% ratio of the Repone K quality in supersaturated solution is the Repone K crystal seed of 0.5mm, forms dense slip; Described Repone K crystal seed be by Repone K raw material with after 35 mesh sieve sub-sieves, screen overflow is rinsed to rear gained with gained saturated solution in A step;
B, the dense slip of gained in A step is placed in to draft tube baffle crystallizer is cooled to 35 ℃ of crystallizations 60 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 7 in draft tube baffle crystallizer.
Embodiment 8
A, first add a certain proportion of discoloring agent, arsenic removing agent and removing heavy metals agent by soluble in water technical grade Repone K, make saturated solution through precipitation, after filtering; Then by gained saturated solution, at the temperature prior to 115 ℃, evaporation concentration obtains supersaturated solution, again by gained supersaturated solution evaporation concentration for some time in 105 ℃ time, then add the Repone K crystal seed of crystal size at 0.3mm according to 60% ratio of the Repone K quality in supersaturated solution, form dense slip; Described Repone K crystal seed be by Repone K raw material with after 40 mesh sieve sub-sieves, screen overflow is rinsed to rear gained with gained saturated solution in A step;
B, the dense slip of gained in A step is placed in to draft tube baffle crystallizer is cooled to 30 ℃ of crystallizations 30 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 8 in draft tube baffle crystallizer.
Embodiment 9
A, first add a certain proportion of discoloring agent, arsenic removing agent and removing heavy metals agent by soluble in water technical grade Repone K, make saturated solution through precipitation, after filtering; Then by gained saturated solution, at the temperature prior to 115 ℃, evaporation concentration obtains supersaturated solution, again by gained supersaturated solution evaporation concentration for some time in 100 ℃ time, then add the Repone K crystal seed of crystal size at 0.6mm according to 100% ratio of the Repone K quality in supersaturated solution, form dense slip; Described Repone K crystal seed be by Repone K raw material with after 35 mesh sieve sub-sieves, screen overflow is rinsed to rear gained with gained saturated solution in A step;
B, the dense slip of gained in A step is placed in to draft tube baffle crystallizer is cooled to 32 ℃ of crystallizations 60 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 9 in draft tube baffle crystallizer.
Embodiment 10
A, first add a certain proportion of discoloring agent, arsenic removing agent and removing heavy metals agent by soluble in water technical grade Repone K, make saturated solution through precipitation, after filtering; Then by gained saturated solution, at the temperature prior to 110 ℃, evaporation concentration obtains supersaturated solution, again by gained supersaturated solution evaporation concentration for some time in 105 ℃ time, then add the Repone K crystal seed of crystal size at 0.3mm according to 60% ratio of the Repone K quality in supersaturated solution, form dense slip; Described Repone K crystal seed be by Repone K raw material with after 40 mesh sieve sub-sieves, screen overflow is rinsed to rear gained with gained saturated solution in A step;
B, the dense slip of gained in A step is placed in to draft tube baffle crystallizer is cooled to 35 ℃ of crystallizations 30 minutes, then by gained crystal separation, dry that described Potassium Chloride Product is embodiment 10 in draft tube baffle crystallizer.
Above-mentioned gained embodiment 1-10 is weighed respectively to total mass, then carry out sub-sieve with 35 mesh sieves respectively, weigh the quality of the screen overflow of each embodiment, calculate it and account for the per-cent of total mass, acquired results is listed in table one.
Table one
Above-mentioned gained embodiment 1-10 is detected respectively to its purity, and acquired results is listed in table two.
Table two
By above-mentioned gained embodiment 1-10 respectively at same environment: in 25 ℃ of temperature, humidity 65%, preserve, observe once every day, if occur, the phenomenon of caking stops preservation, and records the preservation number of days of this embodiment, and that measures the results are shown in table three.
Table three
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. a preparation method for Potassium Chloride Product, is characterized in that: the preparation method of described Potassium Chloride Product includes following steps:
A, by soluble in water technical grade Repone K, first add a certain proportion of purification medicine, after precipitation, filtration, make saturated solution, at the temperature of gained saturated solution prior to 110 ℃-115 ℃, evaporation concentration obtains supersaturated solution, then gained supersaturated solution is carried out at 100 ℃-105 ℃ to double evaporation-cooling concentrated, then adding crystal size according to the ratio of the 80%-100% of Repone K quality in supersaturated solution is the Repone K crystal seed of 0.5-0.6mm, forms dense slip; Described Repone K crystal seed is by after technical grade Repone K sub-sieve, and screen overflow is rinsed to rear gained with gained saturated solution;
B, the dense slip of gained in A step be placed in to crystallizer be cooled to 32-35 ℃ of crystallization 30-60 minute, then by gained crystal separation in crystallizer, dryly to obtain described Potassium Chloride Product; Described crystallizer is draft tube baffle crystallizer;
In gained Potassium Chloride Product, granularity is that the quality of potassium chloride particle more than 0.5mm accounts for the more than 80% of described Potassium Chloride Product quality.
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| CN104222999B (en) * | 2014-09-26 | 2016-06-01 | 大连雅威特生物技术股份有限公司 | The composition of a kind of Novel low-sodium salt, preparation and purposes |
| CN109231239A (en) * | 2018-10-17 | 2019-01-18 | 湖南有色氟化学科技发展有限公司 | A method of ammonium chloride being recycled in the waste liquid that magnesium fluoride generates from preparing |
| CN110451548A (en) * | 2019-09-23 | 2019-11-15 | 山西北化关铝化工有限公司 | Spherical narrow granularity barium nitrate of one kind and preparation method thereof |
| CN112408427A (en) * | 2020-11-30 | 2021-02-26 | 青海民族大学 | Method for preparing potassium chloride from salt lake and method for improving granularity of potassium chloride crystal particles |
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| "氯化钾生产结晶设备及工艺研究";祁洪波等;《无机盐工业》;20070430;第39卷(第4期);第41-43页 * |
| 祁洪波等."氯化钾生产结晶设备及工艺研究".《无机盐工业》.2007,第39卷(第4期),第41-43页. |
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