CN1180043A - Process for extracting fluorhydric acid from fluorine-containing sulphuric acid - Google Patents
Process for extracting fluorhydric acid from fluorine-containing sulphuric acid Download PDFInfo
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- CN1180043A CN1180043A CN 97118885 CN97118885A CN1180043A CN 1180043 A CN1180043 A CN 1180043A CN 97118885 CN97118885 CN 97118885 CN 97118885 A CN97118885 A CN 97118885A CN 1180043 A CN1180043 A CN 1180043A
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- hydrofluoric acid
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The equipment for extracting hydrofluoric acid by using fluorinated sulfuric acid is composed of distillating tower, reflux condenser, pipeline and absorbing tower. Its production process includes the following steps: heating the fluorinated sulfuric acid fed into the distillating tower to evaporate; feeding the evaporated hydrogen fluoride gas into the absorbing tower; using pure water to absorb the hydrogen fluoride gas in the absorbing tower to form hydrofluoric acid. Said invented technological process can separate fluorine from sulfuric acid in the fluorinated sulfuric acid, and can eliminate pollution of fluorine to environment.
Description
The invention belongs to chemical industry and environmental protection technical field, particularly a kind of technology of from contain fluorosulfuric acid, extracting hydrofluoric acid.
At present the production technique of China's hydrofluoric acid is: the vitriol oil adds fluorite and at high temperature reacts, and through slightly heating up in a steamer, make anhydrous hydrofluoric acid after the rectifying, and gives off a considerable amount of fluorosulfuric acids that contain.Existing processing or utilize these fluorine-containing vitriolic methods to have three kinds: the one, will contain fluorosulfuric acid as industrial derusting with acid; The 2nd, will contain fluorosulfuric acid as production of phosphate fertilizer acid; The 3rd, after containing the fluorosulfuric acid dilute with water, directly enter rivers.Existing processing or utilize fluorine-containing vitriolic method to exist following weak point:
1, the fluorine resource is wasted in a large number, be not fully utilized.
2, cause environmental pollution, its consequence mainly is: the fluorine content in the water and soil earth is increased, and surface water and phreatic acidity increase, and this water can not be made industrial water when serious, can not make domestic use of water, more can not make tap water.Human body is taken in the high dosage fluorine, can cause acute poisoning, and the long-term drinking water of high fluorine content can cause the chronic fluorosis and the dental fluorosis of Skeletal system.
Task of the present invention is at existing processing or the weak point of utilizing fluorine-containing vitriolic method to exist, and a kind of technology of extracting hydrofluoric acid from contain fluorosulfuric acid is provided, and the fluorine resource is fully used, and eliminates the pollution of fluorine to environment.
Task of the present invention is finished by the following technical solutions.
A kind of equipment that extracts hydrofluoric acid from contain fluorosulfuric acid is made up of distillation tower still, reflux exchanger, pipeline and absorption tower, wherein the distillation tower still is made up of still kettle, packing tower, the liner on distillation tower still and absorption tower is with both can anti-sulfuric acid, also but the material of hydrofluoric acid resistant such as graphite etc. are made, make it not to be subjected to corrode, heat transfer tube is arranged at distillation tower still inner disc.
The technology of extracting hydrofluoric acid from contain fluorosulfuric acid is:
Steam feeds the heat transfer tube in the distillation tower still, the fluorosulfuric acid that contains that feeds in the distillation tower still is heated up, hydrogen fluoride gas evaporates thereupon, the portion water evaporation of vapours is also arranged simultaneously, and these gases feed in the absorption tower, by the absorbing pure water in the tower, become hydrofluoric acid, by adjusting the ratio of pure water and hydrogen fluoride gas, can produce the hydrofluoric acid product of different concns, hydrofluoric acid is discharged from the discharge outlet of bottom, absorption tower.Containing fluorosulfuric acid becomes not fluorine-containing sulfuric acid after extracting hydrofluoric acid, this sulfuric acid is discharged from the discharge outlet of still kettle bottom.
The invention provides a kind of technology of extracting hydrofluoric acid from contain fluorosulfuric acid, this technology can be separated the fluorine that contains in the fluorosulfuric acid with sulfuric acid, the fluorine resource is fully used, turn harm into good, turn waste into wealth, eliminate the pollution of fluorine, and can make the sulfuric acid reproducible utilization after extracting hydrofluoric acid environment.The present invention has favorable economic benefit and social benefit.The present invention is particularly suitable for Acid of Hydrofluoric Acid Production producer and uses.
Fig. 1 is for extracting the structural representation of hydrofluoric acid equipment from contain fluorosulfuric acid.Wherein (1) represents the sulfuric acid discharge outlet; (2) expression still kettle; (3) expression heat transfer tube steam-gas inlet; (4) expression packing tower; (5) expression contains the fluorosulfuric acid import; (6) expression reflux exchanger; (7) expression pipeline; (8) expression absorption tower; (9) expression water inlet pipe; (10) expression vapor pipe; (11) expression hydrofluoric acid discharge outlet.
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
A kind of equipment that extracts hydrofluoric acid from contain fluorosulfuric acid is made up of distillation tower still, reflux exchanger (6), pipeline (7) and absorption tower (8), wherein the distillation tower still is made up of still kettle (2), packing tower (4), the liner on distillation tower Fu and absorption tower (8) is with both can anti-sulfuric acid, also but the material of hydrofluoric acid resistant such as graphite etc. are made, at distillation tower still inner disc heat transfer tube is arranged, be provided with sulfuric acid discharge outlet (1) in the bottom of still kettle (2).The upper end of the lower end of packing tower (4) and still kettle (2) joins, and the lower end of the upper end of packing tower (4) and reflux exchanger (6) joins, and the two ends of pipeline (7) join with upper end and absorption tower (8) of reflux exchanger (6) respectively.On still kettle (2), be provided with heat transfer tube steam-gas inlet (3), in packing tower (4), be provided with Bao Erhuan, on packing tower (4), be provided with and contain fluorosulfuric acid import (5).The top of (8) is respectively equipped with pure water water inlet pipe (9) and vapor pipe (10) on the absorption tower, and the bottom of (8) is provided with hydrofluoric acid discharge outlet (11) on the absorption tower.
The production process of extracting hydrofluoric acid from contain fluorosulfuric acid is: heating steam enters the interior heat transfer tube of distillation tower still from the heat transfer tube steam-gas inlet (3) on the still kettle (2), contains fluorosulfuric acid and enters in the distillation tower still from the fluorosulfuric acid import (5) that contains on the packing tower (4).The fluorosulfuric acid that contains in the distillation tower still heats up after heating, hydrogen fluoride gas evaporates thereupon, the portion water evaporation of vapours is also arranged simultaneously, these gases are in pipeline (7) feeds absorption tower (8), become hydrofluoric acid by the absorbing pure water in the tower, by the ratio of adjustment pure water and hydrogen fluoride gas, but production concentration is 55% hydrofluoric acid product, and the hydrofluoric acid discharge outlet (11) of this hydrofluoric acid (8) bottom from the absorption tower is discharged.Containing fluorosulfuric acid becomes not fluorine-containingly after extracting hydrofluoric acid, and concentration is the sulfuric acid of 40-75%, and this sulfuric acid is discharged from the sulfuric acid discharge outlet (1) of still kettle (2) bottom.
Claims (3)
1, a kind of equipment that from contain fluorosulfuric acid, extracts hydrofluoric acid, it is characterized in that this equipment is by the distillation tower still, reflux exchanger (6), pipeline (7) and absorption tower (8) are formed, wherein the distillation tower still is by still kettle (2), packing tower (4) is formed, the liner on distillation tower still and absorption tower (8) is with both can anti-sulfuric acid, also but the material of hydrofluoric acid resistant is made, at distillation tower still inner disc heat transfer tube is arranged, be provided with sulfuric acid discharge outlet (1) in the bottom of still kettle (2), the upper end of the lower end of packing tower (4) and still kettle (2) joins, the lower end of the upper end of packing tower (4) and reflux exchanger (6) joins, the two ends of pipeline (7) join with upper end and absorption tower (8) of reflux exchanger (6) respectively, on still kettle (2), be provided with heat transfer tube steam-gas inlet (3), in packing tower (4), be provided with Bao Erhuan, on packing tower (4), be provided with and contain fluorosulfuric acid import (5), the top of (8) is respectively equipped with pure water water inlet pipe (9) and vapor pipe (10) on the absorption tower, and the bottom of (8) is provided with hydrofluoric acid discharge outlet (11) on the absorption tower.
2, a kind of equipment that extracts hydrofluoric acid from contain fluorosulfuric acid according to claim 1 is characterized in that the inner lining material on distillation tower still and absorption tower (8) is a graphite.
3, a kind of technology of fluorine-containing sulphuric acid extraction hydrofluoric acid, it is characterized in that the production process of extracting hydrofluoric acid from contain fluorosulfuric acid is: heating steam feeds the heat transfer tube in the distillation tower still, the fluorosulfuric acid that contains that feeds in the distillation tower still is heated up, hydrogen fluoride gas evaporates thereupon, these gases feed in the absorption tower (8), by the absorbing pure water in the tower, become hydrofluoric acid, the hydrofluoric acid discharge outlet (11) of this hydrofluoric acid (8) bottom from the absorption tower is discharged, containing fluorosulfuric acid becomes not fluorine-containing sulfuric acid after extracting hydrofluoric acid, this sulfuric acid is discharged from the sulfuric acid discharge outlet (1) of still kettle (2) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118885 CN1180043A (en) | 1997-11-10 | 1997-11-10 | Process for extracting fluorhydric acid from fluorine-containing sulphuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118885 CN1180043A (en) | 1997-11-10 | 1997-11-10 | Process for extracting fluorhydric acid from fluorine-containing sulphuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1180043A true CN1180043A (en) | 1998-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97118885 Pending CN1180043A (en) | 1997-11-10 | 1997-11-10 | Process for extracting fluorhydric acid from fluorine-containing sulphuric acid |
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| CN (1) | CN1180043A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497161C (en) * | 2007-01-08 | 2009-06-10 | 战玉柏 | Method and equipment for preparing super clean, high purified hydrofluoric acid |
| CN101214926B (en) * | 2007-12-28 | 2010-04-07 | 华陆工程科技有限责任公司 | Technique for producing anhydrous hydrofluoric acid |
| CN102424367A (en) * | 2011-09-20 | 2012-04-25 | 六九硅业有限公司 | Fluorine-containing sulfuric acid separation concentration device and separation concentration method |
| CN102674254A (en) * | 2011-03-03 | 2012-09-19 | 精工爱普生株式会社 | Separation method and separation device |
| CN103611386A (en) * | 2013-11-07 | 2014-03-05 | 同济大学 | Method for controlling material loss and reducing emission of pollution gas in production process |
| CN108083231A (en) * | 2018-01-05 | 2018-05-29 | 九江天赐高新材料有限公司 | A kind of method of fluorine-containing sulfuric acid separation hydrofluoric acid |
| CN112645287A (en) * | 2020-12-23 | 2021-04-13 | 九江天赐高新材料有限公司 | Recycling method of fluorine-containing sulfuric acid |
-
1997
- 1997-11-10 CN CN 97118885 patent/CN1180043A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497161C (en) * | 2007-01-08 | 2009-06-10 | 战玉柏 | Method and equipment for preparing super clean, high purified hydrofluoric acid |
| CN101214926B (en) * | 2007-12-28 | 2010-04-07 | 华陆工程科技有限责任公司 | Technique for producing anhydrous hydrofluoric acid |
| CN102674254A (en) * | 2011-03-03 | 2012-09-19 | 精工爱普生株式会社 | Separation method and separation device |
| CN102674254B (en) * | 2011-03-03 | 2014-12-03 | 精工爱普生株式会社 | Separation method and separation device |
| CN102424367A (en) * | 2011-09-20 | 2012-04-25 | 六九硅业有限公司 | Fluorine-containing sulfuric acid separation concentration device and separation concentration method |
| CN103611386A (en) * | 2013-11-07 | 2014-03-05 | 同济大学 | Method for controlling material loss and reducing emission of pollution gas in production process |
| CN103611386B (en) * | 2013-11-07 | 2015-10-21 | 同济大学 | A kind of method of production control process materials loss and decreasing pollution gas discharging |
| CN108083231A (en) * | 2018-01-05 | 2018-05-29 | 九江天赐高新材料有限公司 | A kind of method of fluorine-containing sulfuric acid separation hydrofluoric acid |
| CN112645287A (en) * | 2020-12-23 | 2021-04-13 | 九江天赐高新材料有限公司 | Recycling method of fluorine-containing sulfuric acid |
| CN112645287B (en) * | 2020-12-23 | 2023-11-21 | 九江天赐高新材料有限公司 | Recovery and utilization method of fluorine-containing sulfuric acid |
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