CN107055475A - A kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine - Google Patents
A kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine Download PDFInfo
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- CN107055475A CN107055475A CN201610522505.3A CN201610522505A CN107055475A CN 107055475 A CN107055475 A CN 107055475A CN 201610522505 A CN201610522505 A CN 201610522505A CN 107055475 A CN107055475 A CN 107055475A
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- iodine
- groove
- reclaiming
- phosphoric acid
- containing iodine
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/13—Iodine; Hydrogen iodide
- C01B7/14—Iodine
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to iodine field, more particularly to the invention belongs to a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine, by the way that yellow phosphoric tail gas is excluded carbon dioxide therein by pressure swing adsorption method, carbon monoxide therein is rejected by pressure swing adsorption method again and gone, so that the relative amount of iodine is improved, make the content of iodine in yellow phosphoric tail gas before iodine recovery process is entered, its concentration is higher, and the difficulty of iodine is reclaimed in reduction；In conjunction with iodine recovery process, using strong oxidizer, and it is that waste gas containing iodine is passed into strong oxidizer, so that the iodine composition in waste gas is completely oxidized to iodate, and after concentration reaches more than 600ppm, it is sent to again in analysis iodine groove, iodate is reduced into by elemental iodine using reducing agent and separated out, and then reduces the cost for reclaiming iodine in yellow phosphoric tail gas；And in whole technique, the difficulty for the extent control that oxidation processes are carried out to iodine composition is reduced, and then reduces cost.
Description
Technical field
The present invention relates to iodine field, specifically a kind of side for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine
Method.
Background technology
In the prior art, it is concentrated mainly in waste liquid containing iodine and is reclaimed in iodine, Wet-process Phosphoric Acid Production for the technique that iodine is reclaimed
Reclaim iodine；And the method that iodine is reclaimed in phosphoric acid by wet process mainly has two kinds：(1) certain oxidant is added in phosphoric acid by wet process, can
Can be chlorine, potassium permanganate, potassium chlorate or hydrogen peroxide mixes with the one or more of the strong oxidizer such as vanadic anhydride, by iodine
Iodine molecule is oxidized to by the I- of free state, the extractant such as carbon tetrachloride is then added, is sufficiently stirred for iodine molecule being extracted into organic
Xiang Zhong, separation organic phase and acid solution phase, are obtained slightly in certain temperature with evaporating carbon tetrachloride by vacuum distillation mode under pressure
Iodine；(2) certain oxidant is added in phosphoric acid by wet process, it may be possible to chlorine, potassium permanganate, potassium chlorate or hydrogen peroxide and five oxidations
One or more of mixing of the strong oxidizers such as two vanadium, are oxidized to iodine molecule by the I- of free state by iodine, blast air or nitrogen
Iodine molecule in phosphoric acid is blown out, the iodine steam in air-flow introduces molten with a kind of iodine dissolved with SO2 or Na2SO3 behind absorption tower
Liquid absorbs.Iodide solution is flowed out with finite concentration from bottom of towe, and chlorine, potassium permanganate, potassium chlorate or dioxygen are added in solution
The one or more of the strong oxidizer such as water and vanadic anhydride, standing separates out iodine, filters to obtain thick iodine.
Patent of invention content
Patent of the present invention provides a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine, with solution
The problem of stating the not energy-conserving and environment-protective proposed in background technology.
The technical problem that patent of the present invention is solved is realized using following technical scheme：One kind is from fluosilicic acid containing iodine and contains
The method for reclaiming iodine in iodine phosphoric acid,diluted simultaneously, including yellow phosphoric tail gas pretreatment, pressure-variable adsorption carbon dioxide removal, pressure-variable adsorption system
Pure carbon monoxide, pure carbon monoxide is taken to synthesize workshop by sending into ethylene glycol after compression；Pure carbon monoxide is produced to produce
Waste gas feeding iodine recovery workshop, in recovery workshop, waste gas is first passed through suction iodine groove, the content of iodine in iodine groove to be inhaled >=
After 600ppm, the iodin-containing liquid inhaled in iodine groove is transferred to and analyses iodine groove, the pH=2-3 in regulation analysis iodine groove, addition reducing agent, filtering,
Dry thick iodine；And pretreatment will be mixed with yellow phosphoric tail gas in the waste gas return pre-treatment step in suction iodine groove out, you can it is complete
Reclaimed into iodine.
Brief description of the drawings
Fig. 1 is a kind of method structural representation for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine of the present invention
Figure.
Embodiment
Embodiment：
The present embodiment includes：The technical problem that patent of the present invention as shown in Figure 1 is solved is using following technical scheme come real
It is existing：The invention belongs to a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine,
During the yellow phosphoric tail gas come out from phosphorus production workshop is sent into PSA devices, by the effect of pressure-variable adsorption, exclude yellow
Carbon dioxide in phosphorus tail gas, obtains carbon dioxide removal waste gas, then carbon dioxide removal waste gas is sent into another PSA device
In, then by the effect of pressure-variable adsorption, the carbon monoxide in carbon dioxide removal waste gas is removed to come, obtain pure carbon monoxide
With removal of carbon monoxide waste gas, pure CO gas sends into ethylene glycol workshop after compressor compresses are handled；Will
Removal of carbon monoxide waste gas after treatment, by its flow control 1dm3/min send into iodine recovery workshop in suction iodine groove in, and
It is 60 DEG C to control to inhale the temperature in iodine groove, inhales and mass percentage concentration is housed for 1% strong oxidizer in iodine groove, wherein strong oxidizer is
Potassium permanganate acid solution.Treat that it absorbs in iodine groove is inhaled so that the content of iodine composition is reached after 600ppm, then is transferred to analysis
In iodine groove, and it is 2 to adjust its pH value, adds reducing agent, wherein reducing agent is sulfurous acid, and the addition of reducing agent is 1000 kilograms
The above-mentioned iodin-containing liquid absorbed in groove adds 3 kilograms, filtering, dry thick iodine；And return to the waste gas inhaled in iodine groove out pre-
Pretreatment is mixed in process step with yellow phosphoric tail gas, you can complete iodine and reclaim.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Any modifications, equivalent substitutions and improvements made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (5)
1. a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine, including yellow phosphoric tail gas pretreatment, transformation
Adsorbing and removing carbon dioxide, pressure-variable adsorption are produced pure carbon monoxide, pure carbon monoxide and closed by sending into ethylene glycol after compression
Into workshop；The waste gas feeding iodine recovery workshop that pure carbon monoxide is produced is produced, in recovery workshop, waste gas is first passed through suction iodine
Groove, after content of iodine >=600ppm in iodine groove is inhaled, the pH in analysis iodine groove, regulation analysis iodine groove is transferred to by the iodin-containing liquid inhaled in iodine groove
=2-3, adds reducing agent, filtering, dry thick iodine；And by inhale iodine groove in out waste gas return pre-treatment step in yellow phosphorus
Tail gas mixing pretreatment, you can complete iodine and reclaim.
2. a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine as claimed in claim 1, its feature
It is, described reducing agent is one or several kinds of mixtures in sulfurous acid, sodium sulfite, ferrous sulfate.
3. a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine as claimed in claim 1, its feature
It is, described suction iodine groove, wherein there is strong oxidizer.
4. a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine as described in claim 1 or 3, it is special
Levy and be, described suction iodine groove, wherein having potassium permanganate acid solution, potassium chlorate solution, postassium hypochlorite solution, hydrogen peroxide, chlorine
One or any several mixed liquors in air water solution or any one composite oxidant constituted with vanadic anhydride or
The composite oxidant that any several mixed liquors of person are constituted with vanadic anhydride.
5. a kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine as described in claim 1 or 3, it is special
Levy and be, described suction iodine groove, temperature therein is 60-80 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522505.3A CN107055475A (en) | 2016-06-30 | 2016-06-30 | A kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522505.3A CN107055475A (en) | 2016-06-30 | 2016-06-30 | A kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine |
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| Publication Number | Publication Date |
|---|---|
| CN107055475A true CN107055475A (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610522505.3A Pending CN107055475A (en) | 2016-06-30 | 2016-06-30 | A kind of method for reclaiming iodine simultaneously from fluosilicic acid containing iodine and phosphoric acid,diluted containing iodine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109503783A (en) * | 2018-12-10 | 2019-03-22 | 万华化学集团股份有限公司 | A kind of terminal siloxane modified polyacrylate block copolymer and preparation method thereof |
| CN112938901A (en) * | 2021-02-08 | 2021-06-11 | 中船重工（邯郸）派瑞特种气体有限公司 | Method for recovering iodine simple substance from zinc iodide waste salt |
-
2016
- 2016-06-30 CN CN201610522505.3A patent/CN107055475A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109503783A (en) * | 2018-12-10 | 2019-03-22 | 万华化学集团股份有限公司 | A kind of terminal siloxane modified polyacrylate block copolymer and preparation method thereof |
| CN109503783B (en) * | 2018-12-10 | 2021-07-23 | 万华化学集团股份有限公司 | Terminal siloxane modified polyacrylate block copolymer and preparation method thereof |
| CN112938901A (en) * | 2021-02-08 | 2021-06-11 | 中船重工（邯郸）派瑞特种气体有限公司 | Method for recovering iodine simple substance from zinc iodide waste salt |
| CN112938901B (en) * | 2021-02-08 | 2022-05-10 | 中船(邯郸)派瑞特种气体股份有限公司 | Method for recovering iodine simple substance from zinc iodide waste salt |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170818 |