CN107098376A - A kind of cold liquid heat rushes the production technology that legal system takes white vitriol - Google Patents
A kind of cold liquid heat rushes the production technology that legal system takes white vitriol Download PDFInfo
- Publication number
- CN107098376A CN107098376A CN201710198991.2A CN201710198991A CN107098376A CN 107098376 A CN107098376 A CN 107098376A CN 201710198991 A CN201710198991 A CN 201710198991A CN 107098376 A CN107098376 A CN 107098376A
- Authority
- CN
- China
- Prior art keywords
- white vitriol
- liquid heat
- production technology
- legal system
- system takes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/06—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
Abstract
The production technology that legal system takes white vitriol is rushed the invention discloses a kind of cold liquid heat, saturation solution of zinc sulfate is carried out successively for the first time quickly cool down, crystallize, quickly cool down for the second time, add hot saturated solution, for the third time quickly cool down, cooling water crystallisation by cooling obtain white vitriol product, it is used in industrial production, the zinc sulfate crystal of bulky grain is obtained, product free water content is remarkably decreased, crystallization time is shortened, production efficiency and product quality is improved.
Description
Technical field
The present invention relates to white vitriol production technical field, more particularly to a kind of cold liquid heat method of rushing produces seven water sulfuric acid
The production technology of zinc.
Background technology
In the industrial production, white vitriol is crystalline product of the zinc sulfate saturated solution below 39 DEG C after concentration.
Thick crystal is easily dehydrated, and makes product quality more preferable because the impurity of its absorption is few.Obtaining the product of coarse grains needs to prolong
Long crystallization time, crystallization time is up to or so 20 hours in present actual production.If crystallization time not enough if can only obtain
Fine grain product, adsorbs more free water, it is difficult to dried in centrifuge, cause main grade zinc because its specific surface area is big
Content is inadequate and easily lumps, as underproof product.Therefore, how the seven of bulky grain is effectively prepared in the industrial production
Water zinc sulphate crystal, is the technical problem to be solved in the invention.
The content of the invention
The present invention provides a kind of cold liquid heat and rushes the production that legal system takes white vitriol aiming at above-mentioned defect
Technique, saturation solution of zinc sulfate is carried out successively quickly cool down for the first time, crystallize, quickly cool down for the second time, to add hot saturation molten
The quick cooling of liquid, third time, cooling water crystallisation by cooling obtain white vitriol product, are used in industrial production, have obtained big
The zinc sulfate crystal of particle, product free water content is remarkably decreased, and shortens crystallization time, improves production efficiency and product matter
Amount.
A kind of cold liquid heat of the present invention rushes legal system and takes the production Technology scheme of white vitriol to be to comprise the following steps：
（1）In crystallizing tank, 50 DEG C -60 DEG C of saturation solution of zinc sulfate is added, carries out being quickly cooled to 40 DEG C for the first time, slowly
Stirring allows it to crystallize 6 hours, and now liquid temperature is 39 DEG C in tank, and has a large amount of tiny white vitriols crystallizations, and the is then carried out again
Secondary quick crystallisation by cooling, obtains 30 DEG C -35 DEG C compared with cold soln；
（2）42 DEG C of saturation solution of zinc sulfate pump impulses are entered in the relatively cold soln in crystallizing tank, after being sufficiently stirred for, mixed liquor the 3rd
It is secondary to be quickly cooled to less than 39 DEG C, then the 4th crystallisation by cooling 4-4.5h is carried out, dried through centrifuge, obtain white vitriol production
Product.
Step（1）The middle saturation solution of zinc sulfate that adds is the 1/2 of crystallization tankage size.
Step（1）In second quick crystallisation by cooling to 35 DEG C.
Step（2）In, 42 DEG C of saturation solution of zinc sulfate additions and step（1）In 50 DEG C -60 DEG C saturation zinc sulfate it is molten
The amount of liquid is identical.
Step（2）In, it is cooled to 33-35 DEG C of crystallization the 4th time.
Described first time quickly cools down, second of quick cooling, the quick cooling of third time and the 4th cooling be all with following
Ring cools down water cooling.
Step（2）In, centrifuge speed is 8000r/min.
The white vitriol product Zn content that the technique is obtained reaches 22.43-22.47%, and particle diameter reaches 0.27-0.3mm.
Beneficial effects of the present invention are：The present invention is according to actual production, in combination with dissolution characteristics of the zinc sulfate in water
And its Crystallization Characteristics, the new technology that legal system takes white vitriol is rushed with a kind of cold liquid heat, is used in industrial production, obtains
The zinc sulfate crystal of bulky grain, particle is thick, easily dries, and product free water content is remarkably decreased, shortens crystallization time, carry
High production efficiency and product quality.The worth white vitriol product free water content of existing process is general 5.5% or so,
And white vitriol product free water content≤2.5% that present invention process is obtained.
Embodiment：
For a better understanding of the present invention, technical scheme is described in detail with instantiation below, but it is of the invention
It is not limited thereto.
Embodiment 1
（1）In crystallizing tank, saturated solution liquid after adding the purification through evaporation and concentration of 50 DEG C -60 DEG C or so of half tank, with circulation
Cooling water is quickly cooled to 40 DEG C, is slowly stirred and allows it to crystallize 6 hours, now liquid temperature is 39 DEG C in tank, and has a large amount of tiny by seven
Water zinc sulphate is crystallized, and then opens big cooling water, quick crystallisation by cooling is obtained compared with cold soln to 35 DEG C.
（2）Hotter saturated solution pump impulse after another 42 DEG C of concentrations by half tank enters in above-mentioned half tank cold soln, is sufficiently stirred for
Afterwards, mixeding liquid temperature is quickly cooled to 39 DEG C with recirculated cooling water, then with cooling water crystallisation by cooling 4 hours to 35 DEG C, warp
8000r/min centrifuges are dried, and obtained white vitriol product Zn content is up to 22.47%, and particle diameter reaches 0.28mm, free water
Content is 2.2%.Meet industrial certified products quality requirement.
Embodiment 2
（1）In crystallizing tank, saturated solution liquid after adding the purification through evaporation and concentration of 50 DEG C -60 DEG C or so of half tank, with circulation
Cooling water is quickly cooled to 40 DEG C, is slowly stirred and allows it to crystallize 6 hours, now liquid temperature is 39 DEG C in tank, and has a large amount of tiny by seven
Water zinc sulphate is crystallized, and then opens big cooling water, quick crystallisation by cooling is obtained compared with cold soln to 35 DEG C.
（2）Hotter saturated solution pump impulse after another 42 DEG C of concentrations by half tank enters in the relatively cold soln in crystallizing tank, fully
After stirring, mixeding liquid temperature is quickly cooled to 39 DEG C with recirculated cooling water, then with cooling water crystallisation by cooling 4.5 hours to 33
DEG C, dried through centrifuge, obtained white vitriol product Zn content is up to 22.43%, and particle diameter reaches 0.29mm, free water content
For 2.4%.Meet industrial certified products quality requirement.
Claims (8)
1. a kind of cold liquid heat rushes the production technology that legal system takes white vitriol, it is characterised in that comprise the following steps：
（1）In crystallizing tank, 50 DEG C -60 DEG C of saturation solution of zinc sulfate is added, carries out being quickly cooled to 40 DEG C for the first time, slowly
Stirring allows it to crystallize 6 hours, and now liquid temperature is 39 DEG C in tank, and has a large amount of tiny white vitriols crystallizations, and the is then carried out again
Secondary quick crystallisation by cooling, obtains 30 DEG C -35 DEG C compared with cold soln；
（2）42 DEG C of saturation solution of zinc sulfate pump impulses are entered in the relatively cold soln in crystallizing tank, after being sufficiently stirred for, mixed liquor the 3rd
It is secondary to be quickly cooled to less than 39 DEG C, then the 4th crystallisation by cooling 4-4.5h is carried out, dried through centrifuge, obtain white vitriol production
Product.
2. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that step
Suddenly（1）The middle saturation solution of zinc sulfate that adds is the 1/2 of crystallization tankage size.
3. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that step
Suddenly（1）In second quick crystallisation by cooling to 35 DEG C.
4. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that step
Suddenly（2）In, 42 DEG C of saturation solution of zinc sulfate additions and step（1）In 50 DEG C -60 DEG C saturation solution of zinc sulfate amount it is identical.
5. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that step
Suddenly（2）In, it is cooled to 35 DEG C of crystallizations the 4th time.
6. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that institute
The first time stated quickly is cooled down, quickly circulating cooling water cooling is all used in cooling and the 4th cooling for second quick cooling, third time
But.
7. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that step
Suddenly（2）In, centrifuge speed is 8000r/min.
8. a kind of cold liquid heat according to claim 1 rushes the production technology that legal system takes white vitriol, it is characterised in that should
The white vitriol product Zn content that technique is obtained reaches 22.43-22.47%, and particle diameter reaches 0.27-0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198991.2A CN107098376A (en) | 2017-03-29 | 2017-03-29 | A kind of cold liquid heat rushes the production technology that legal system takes white vitriol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198991.2A CN107098376A (en) | 2017-03-29 | 2017-03-29 | A kind of cold liquid heat rushes the production technology that legal system takes white vitriol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107098376A true CN107098376A (en) | 2017-08-29 |
Family
ID=59675177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710198991.2A Pending CN107098376A (en) | 2017-03-29 | 2017-03-29 | A kind of cold liquid heat rushes the production technology that legal system takes white vitriol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107098376A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108905263A (en) * | 2018-07-13 | 2018-11-30 | 连云港康乐药业有限公司 | A kind of production method of paracetamol fine grain |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512844A (en) * | 2011-12-27 | 2012-06-27 | 刘向东 | Device for controlling zinc sulfate heptahydrate cooling crystallization shape, and cooling method thereof |
-
2017
- 2017-03-29 CN CN201710198991.2A patent/CN107098376A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512844A (en) * | 2011-12-27 | 2012-06-27 | 刘向东 | Device for controlling zinc sulfate heptahydrate cooling crystallization shape, and cooling method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王坚等: ""七水硫酸锌结晶工艺的研究"", 《南方金属》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108905263A (en) * | 2018-07-13 | 2018-11-30 | 连云港康乐药业有限公司 | A kind of production method of paracetamol fine grain |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170829 |