CN102849682B - Industrial bromine refining method - Google Patents
Industrial bromine refining method Download PDFInfo
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- CN102849682B CN102849682B CN201110174450.9A CN201110174450A CN102849682B CN 102849682 B CN102849682 B CN 102849682B CN 201110174450 A CN201110174450 A CN 201110174450A CN 102849682 B CN102849682 B CN 102849682B
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Abstract
The invention discloses an industrial bromine refining method, where distilled bromine vapor is condensed into liquid bromine by a crude bromine condenser and free chlorine in the liquid bromine is absorbed so as to refine the crude bromine. The method is characterized in that procedures of two-step mixed absorption and two-step separation are adopted to absorb the free chlorine in the liquid bromine; and in the two-step mixed absorption procedure, the crude liquid bromine and material solution are simultaneously introduced into a static mixer and are mixed fully, so as to absorb the free chlorine in the liquid bromine by the material solution. Due to the adoption of the static mixer, the free chlorine in the crude liquid bromine can thoroughly contact the absorption solution to improve dissolution effect and achieve the purpose of high-efficiency chlorine removal. The method has the advantages of simple process, less investment, easy operation, high safety and good bromine refining effect.
Description
Affiliated field:
The present invention relates to a kind of production method of industrial bromine, particularly the refining production method of thick bromine in a kind of industrial bromine production.
Background technology:
At present, in the production technique of domestic industry bromine, be mainly utilize the potassium mother liquor processed steaming bromine technique of carrying out with utilize that the middle low bittern of not salt manufacturing and subsurface brine carry out blow bromine technique, owing to being all to have adopted chlorine to be oxidized in the production process of industrial bromine, and it is joined chlorine rate and is generally 115% left and right, so the thick bromine distilling out must just can reach by refining dechlorination the industry standard of industrial bromine.
At present in the technique of domestic production industrial bromine, the process for purification of thick bromine is that the bromine vapor that distillation tower is distilled out enters in the rectifying tower of being furnished with condenser, and the character according to the boiling point of chlorine lower than bromine adopts the mode of rectifying to make discharge system after free chlorine evaporation.Because rectifying device and separating device are splits, thus this kind of process for purification complex manufacturing, equip huge, investment is many, operation easier is large, safety performance is low, refining effect is poor.Also have part producing unit to adopt to add raw brine to sponge free chlorine, but this kind of most employing of method is that spray-type or tubular type absorb, because bromine can not fully contact with raw brine, affect assimilation effect, so refining effect is unsatisfactory in actual motion.
Summary of the invention:
The present invention has overcome the deficiencies in the prior art, and a kind of easy and simple to handle, equipment investment is few, free chlorine specific absorption is high industrial bromine process for purification is provided.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is:
A kind of process for purification of industrial bromine, that the bromine vapor distilling out is become after liquid bromine through thick bromine condenser condenses, free chlorine in liquid towards bromine absorbs and then makes thick bromine obtain refining method, the method has adopted the free chlorine in the step liquid towards bromine that two-stage blended absorbent, two-stage separate to absorb, the step of described two-stage blended absorbent, for pass into thick bromine and stock liquid and fully mix in static mixer simultaneously, makes the free chlorine in liquid bromine be absorbed by stock liquid.
According to above technical scheme, described two-stage blended absorbent, the step that two-stage separates are:
(1) the thick bromine being become by thick bromine condenser condenses enters one-level static mixer with stock liquid fully mixes, and makes free chlorine in thick bromine by stock liquid solution absorption;
(2) mixing liquid of being discharged by one-level static mixer enters flash trapping stage bottle, and the one section of stock liquid that has made to dissolve free chlorine separates with bromine, and isolated one section of stock liquid returns to Distallation systm;
(3) the isolated bromine in flash trapping stage bottle bottom is fully mixed by secondary static mixer again with the stock liquid newly adding, and makes free chlorine further by stock liquid solution absorption;
(4) mixing liquid of being discharged by secondary static mixer enters the second-order separation bottle, and two sections of stock liquids that made to dissolve free chlorine separate again with bromine, and isolated two sections of stock liquids return to Distallation systm;
(5) the isolated refining bromine in the second-order separation bottle bottom enters finished product bromine storage tank.
The described stock liquid joining in static mixer is the 50%-100% of the volume flow ratio of bromine.
Described static mixer is that level is installed.
Described stock liquid is normal temperature stock liquid.
Advantage and beneficial effect that the present invention has are:
Industrial bromine process for purification of the present invention, owing to having adopted static mixer that the free chlorine in thick bromine is fully contacted with absorption liquid, has improved solute effect, has reached the object of high-efficiency dechlorination.Have that production technique is simple, equipment investment is few, it is little to invest, feature that energy consumption is low, easy and simple to handle, safety performance is high, bromine refining effect is good, utilize the chlorinity decline 90-96% of the thicker bromine of finished product bromine of this technology production, finished product bromine content reaches more than 99.8%, chlorinity is down to below 0.045%, reaches QB/T2021-1994 industry top grade standard.And decline to some extent because recycling of absorption liquid makes product chlorine consumption, ton product chlorine consumption declines 2.75 kilograms, has saved cost.
Brief description of the drawings:
Fig. 1: industrial bromine process for purification process flow diagram
In figure: 1, thick bromine condenser, 2, one section of static mixer, 3, one section of separating bottle, 4, two sections of static mixers, 5, two sections of separating bottles, 6, bromine storage tank, 7, distillation tower.
Embodiment:
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
A process for purification for industrial bromine, is that the bromine vapor distilling out is become after liquid bromine through thick bromine condenser condenses, and the free chlorine in the step liquid towards bromine that employing two-stage blended absorbent, two-stage separate absorbs, and then makes thick bromine obtain refining method.The concrete steps of the method are:
(1) after the thick bromine that the bromine vapor of being discharged by distillation tower becomes through thick bromine condenser condenses, the normal temperature stock liquid that is thick bromine 70% with volumetric flow rate enters the one-level static mixer that level is installed together with orthogonal flow direction of material, fully mix, make the dissolving that is absorbed of free chlorine in thick bromine in stock liquid;
(2) mixing liquid of being discharged by one-level static mixer enters flash trapping stage bottle, and the one section of stock liquid that has made to dissolve free chlorine according to the poor principle of severe separates with bromine, and isolated one section of stock liquid returns to distillation tower;
(3) the normal temperature stock liquid that the isolated bromine in flash trapping stage bottle bottom and the volumetric flow rate newly adding are thick bromines 70% enters with orthogonal flow direction of material the secondary static mixer that level is installed again, fully mix, make free chlorine further be absorbed and dissolve by stock liquid;
(4) mixing liquid of being discharged by secondary static mixer enters the second-order separation bottle, two sections of stock liquids that made to dissolve free chlorine according to the poor principle of severe separate again with bromine, isolated two sections of stock liquids and the one section of isolated one section of stock liquid of separating bottle distillation tower that returns in parallel;
(5) the second-order separation bottle isolated refining bromine in bottom (being finished product bromine) enters finished product bromine storage tank.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skill in the art make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (5)
1. the process for purification of an industrial bromine, that the bromine vapor distilling out is become after liquid bromine through thick bromine condenser condenses, free chlorine in liquid towards bromine absorbs and then makes thick bromine obtain refining method, it is characterized in that adopting the free chlorine in the step liquid towards bromine that two-stage blended absorbent, two-stage separate to absorb, the step of described two-stage blended absorbent, for pass into thick bromine and stock liquid and fully mix in static mixer simultaneously, makes the free chlorine in liquid bromine be absorbed by stock liquid.
2. the process for purification of a kind of industrial bromine according to claim 1, is characterized in that the step that described two-stage blended absorbent, two-stage separate is:
(1) the thick bromine being become by thick bromine condenser condenses enters one-level static mixer with stock liquid fully mixes, and makes free chlorine in thick bromine by stock liquid solution absorption;
(2) mixing liquid of being discharged by one-level static mixer enters flash trapping stage bottle, and the one section of stock liquid that has made to dissolve free chlorine separates with bromine, and isolated one section of stock liquid returns to Distallation systm;
(3) the isolated bromine in flash trapping stage bottle bottom is fully mixed by secondary static mixer again with the stock liquid newly adding, and makes free chlorine further by stock liquid solution absorption;
(4) mixing liquid of being discharged by secondary static mixer enters the second-order separation bottle, and two sections of stock liquids that made to dissolve free chlorine separate again with bromine, and isolated two sections of stock liquids return to Distallation systm;
(5) the isolated refining bromine in the second-order separation bottle bottom enters finished product bromine storage tank.
3. according to the process for purification of a kind of industrial bromine described in claim 1 and 2, it is characterized in that described stock liquid is normal temperature stock liquid.
4. according to the process for purification of a kind of industrial bromine described in claim 1 and 2, it is characterized in that described static mixer is that level is installed.
5. according to the process for purification of a kind of industrial bromine described in claim 1 and 2, the stock liquid joining described in it is characterized in that in static mixer is the 50%-100% of the volume flow ratio of bromine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110174450.9A CN102849682B (en) | 2011-06-27 | 2011-06-27 | Industrial bromine refining method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110174450.9A CN102849682B (en) | 2011-06-27 | 2011-06-27 | Industrial bromine refining method |
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| CN102849682A CN102849682A (en) | 2013-01-02 |
| CN102849682B true CN102849682B (en) | 2014-10-15 |
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| CN105460895A (en) * | 2015-12-30 | 2016-04-06 | 山东昌邑廒里盐化有限公司 | Novel bromine production device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830438A (en) * | 2010-05-14 | 2010-09-15 | 山东大地盐化集团有限公司 | Method for purifying simple substance bromine from hydrobromic acid mother liquor |
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| JPS51136844A (en) * | 1975-05-23 | 1976-11-26 | Godo Shigen Sangyo Kk | Process for purifing natural salt water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830438A (en) * | 2010-05-14 | 2010-09-15 | 山东大地盐化集团有限公司 | Method for purifying simple substance bromine from hydrobromic acid mother liquor |
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