CN102674252A - Production method of reagent hydrochloric acid - Google Patents
Production method of reagent hydrochloric acid Download PDFInfo
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- CN102674252A CN102674252A CN2012100905777A CN201210090577A CN102674252A CN 102674252 A CN102674252 A CN 102674252A CN 2012100905777 A CN2012100905777 A CN 2012100905777A CN 201210090577 A CN201210090577 A CN 201210090577A CN 102674252 A CN102674252 A CN 102674252A
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- hydrochloric acid
- hydrogen chloride
- acid
- distiller
- chloride gas
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Abstract
The invention relates to a production method of reagent hydrochloric acid. The production method of the hydrochloric acid includes the steps of a, adding industrial hydrochloric acid into a distiller, heating to boil, controlling gas pressure of the distiller and a production system to be 100mmHg; b, subjecting hydrogen chloride gas and steam to continuous primary condensation; c, allowing the steam being condensed to absorb the hydrogen chloride gas primarily condensed to obtain low concentration acid, allowing the low concentration acid to enter a dilute acid recycler, and subjecting part of hydrogen chloride unabsorbed to secondary condensation by a condenser; and d, allowing the hydrogen chloride gas secondarily condensed to enter a container containing absorption liquid, namely purified water, to be absorbed, and subpackaging and storing finished hydrochloric acid when concentration of the hydrogen chloride in the absorption liquid reaches more than 36%. By the method, purification of the industrial hydrochloric acid is changed into vacuum purification, and accordingly boiling point of the hydrochloric acid is lowered, volatilization of the hydrogen chloride is quickened, and continuous production is achieved. Production efficiency is twice as high as that of the traditional technique, and energy conservation is quite evident.
Description
Technical field
The invention belongs to field of fine chemical, particularly a kind of working method of technical hydrochloric acid.
Background technology
The working method of reagent hydrochloric acid mainly is from technical hydrochloric acid, to purify to obtain, and the method for technical hydrochloric acid purification at present mainly contains distillation method and resin method.Distillation method is that the hydrogen chloride gas that steams obtains high purity hydrochloric acid through condensation or absorption with technical hydrochloric acid heating evaporation under normal pressure, and its shortcoming is that energy consumption is big, and the maintenance of the equipment difficulty is big, poor stability, and production efficiency is low, and cost is high; Resin method is through high molecular functional property polymeric adsorbent with technical hydrochloric acid; The dianion absorption of metals ion that exists in the technical hydrochloric acid and some amount is removed; Its disadvantage is to remove light metal ion weak effect; Do not reach some to the request for utilization that calcium, magnesium are had relatively high expectations, influenced its use range, and can't continuous production.
Summary of the invention
But the defective that the objective of the invention is to avoid prior art provides a kind of working method of energy-efficient quantity-produced reagent hydrochloric acid.
For realizing above-mentioned purpose, the technical scheme that the present invention takes is: a kind of working method of reagent hydrochloric acid is characterized in that comprising the steps:
A, technical hydrochloric acid added carry out heated and boiled in the distiller;
The evaporable hydrogen chloride gas carries out the one-level condensation through condensing surface in b, the above-mentioned distiller;
C, the condensed hydrogen chloride gas of one-level are absorbed by the water vapour of while condensation and form lower concentration acid entering diluted acid withdrawer, do not have absorbed part hydrogen chloride gas to carry out B-grade condensation again through condensing surface;
Hydrogen chloride gas behind d, the B-grade condensation gets into to be equipped with in the container that absorption liquid is a pure water and absorbs, and treats in the absorption liquid that hydrogen cloride concentration reaches 36% when above, is finished product hydrochloric acid, packing, warehouse-in.
In the said purification process, air pressure in distiller and the production system is controlled to be negative pressure 100 mmhg with vacuum pump.
Lower concentration acid cooling back in the said diluted acid withdrawer is as absorption liquid.
Recirculated cooling water temperature in the said condensing surface is controlled at below 30 ℃.
Also be provided with moisture eliminator in the said production system, guarantee the continuous works better of vacuum pump.
The invention has the beneficial effects as follows: change the purification process of technical hydrochloric acid into negative pressure state, make the hydrochloric acid boiling point lowering, accelerate volatile hydrogen chloride, but continuous production, production efficiency is more than the twice of traditional technology, the energy-saving effect highly significant.
Description of drawings
Fig. 1 is a schema of the present invention;
Among the figure: 1-head tank, 2-distiller, 3-well heater, 4-condensing surface, 5-condensing surface, 6-diluted acid withdrawer, 7-condensing surface, 8-condensing surface, 9-resorber, 10-moisture eliminator, 11-vacuum pump.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and characteristic are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Embodiment 1:
See Fig. 1, a kind of working method of reagent hydrochloric acid, concrete steps are following:
A, the technical hydrochloric acid in the head tank 1 is got in the distiller 2, be heated to hydrochloric acid with well heater 3 and seethe with excitement;
The evaporable hydrogen chloride gas carries out the one-level condensation continuously through condensing surface 4 and condensing surface 5 in b, the above-mentioned distiller 2;
C, the condensed hydrogen chloride gas of one-level are absorbed by the water vapour of while condensation and form in the lower concentration acid entering diluted acid withdrawer 6, do not have absorbed part hydrogen chloride gas to carry out B-grade condensation continuously through condensing surface 7 and condensing surface 8;
Hydrogen chloride gas behind d, the B-grade condensation gets into to be equipped with in the resorber 9 that absorption liquid is a pure water and absorbs, and treats in the absorption liquid that hydrogen cloride concentration reaches 36% when above, is finished product hydrochloric acid, packing, warehouse-in.
In the above-mentioned purification process, air pressure in distiller 2 and the production system is controlled to be negative pressure 100 mmhg,, also is provided with moisture eliminator 10 in the above-mentioned production system, make vacuum pump 11 remain drying for guaranteeing vacuum pump 11 continuous works better with vacuum pump 11.
Lower concentration acid cooling back in the said diluted acid withdrawer is as absorption liquid.
Recirculated cooling water temperature in the said condensing surface is controlled at below 30 ℃.
The hydrochloric acid of output reaches reagent hydrochloric acid analytical pure standard (GB622-1989) through analysis.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the working method of a reagent hydrochloric acid is characterized in that comprising the steps:
A, technical hydrochloric acid added carry out heated and boiled in the distiller, distiller keeps the negative pressure operation;
The evaporable hydrogen chloride gas carries out the one-level condensation through condensing surface in b, the above-mentioned distiller;
C, the condensed hydrogen chloride gas of one-level are absorbed by the water vapour of while condensation and form lower concentration acid entering diluted acid withdrawer, do not have absorbed part hydrogen chloride gas to carry out B-grade condensation again through condensing surface;
Hydrogen chloride gas behind d, the B-grade condensation gets into to be equipped with in the container that absorption liquid is a pure water and absorbs, and treats in the absorption liquid that hydrogen cloride concentration reaches 36% when above, is finished product hydrochloric acid, packing, warehouse-in.
2. the working method of reagent hydrochloric acid as claimed in claim 1 is characterized in that in the said purification process, with vacuum pump air pressure in distiller and the production system is controlled to be negative pressure 100 mmhg.
3. the working method of reagent hydrochloric acid as claimed in claim 1 is characterized in that the lower concentration acid in the said diluted acid withdrawer is cooled off the back as absorption liquid.
4. the working method of reagent hydrochloric acid as claimed in claim 1 is characterized in that the recirculated cooling water temperature in the said condensing surface is controlled at below 30 ℃.
5. the working method of reagent hydrochloric acid as claimed in claim 2 is characterized in that also being provided with in the said production system moisture eliminator, guarantees the continuous works better of vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100905777A CN102674252A (en) | 2012-03-30 | 2012-03-30 | Production method of reagent hydrochloric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100905777A CN102674252A (en) | 2012-03-30 | 2012-03-30 | Production method of reagent hydrochloric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102674252A true CN102674252A (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100905777A Pending CN102674252A (en) | 2012-03-30 | 2012-03-30 | Production method of reagent hydrochloric acid |
Country Status (1)
| Country | Link |
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| CN (1) | CN102674252A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874757A (en) * | 2012-10-29 | 2013-01-16 | 国药集团化学试剂有限公司 | Preparation method of high-purity hydrochloric acid |
| CN103879964A (en) * | 2014-04-03 | 2014-06-25 | 苏州晶瑞化学有限公司 | Continuous production method of high-purity hydrochloric acid |
| CN111422833A (en) * | 2020-03-20 | 2020-07-17 | 安徽相邦化工有限公司 | Method for preparing ultra-clean high-purity hydrochloric acid by separating hydrogen chloride from hydrochloric acid-containing mother liquor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092740A (en) * | 1993-03-18 | 1994-09-28 | 吴锡波 | Process for preparing high concentration hydrochloric acid reagent |
| CN1587027A (en) * | 2004-08-30 | 2005-03-02 | 金川集团有限公司 | Method for producing reagent hydrochloric acid |
| CN101081693A (en) * | 2007-06-29 | 2007-12-05 | 杭州中昊科技有限公司 | Complete recovering technique for hydrochloride in industrial gas |
| CN101628710A (en) * | 2009-08-03 | 2010-01-20 | 中国石化集团南京设计院 | Method for producing high-purity concentrated hydrochloric acid by adopting hydrogen chloride gas containing chlorosilane |
| CN101863803A (en) * | 2010-06-10 | 2010-10-20 | 湖北星火化工有限公司 | Purification method of byproduct hydrochloric acid |
-
2012
- 2012-03-30 CN CN2012100905777A patent/CN102674252A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092740A (en) * | 1993-03-18 | 1994-09-28 | 吴锡波 | Process for preparing high concentration hydrochloric acid reagent |
| CN1587027A (en) * | 2004-08-30 | 2005-03-02 | 金川集团有限公司 | Method for producing reagent hydrochloric acid |
| CN101081693A (en) * | 2007-06-29 | 2007-12-05 | 杭州中昊科技有限公司 | Complete recovering technique for hydrochloride in industrial gas |
| CN101628710A (en) * | 2009-08-03 | 2010-01-20 | 中国石化集团南京设计院 | Method for producing high-purity concentrated hydrochloric acid by adopting hydrogen chloride gas containing chlorosilane |
| CN101863803A (en) * | 2010-06-10 | 2010-10-20 | 湖北星火化工有限公司 | Purification method of byproduct hydrochloric acid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874757A (en) * | 2012-10-29 | 2013-01-16 | 国药集团化学试剂有限公司 | Preparation method of high-purity hydrochloric acid |
| CN102874757B (en) * | 2012-10-29 | 2015-03-11 | 国药集团化学试剂有限公司 | Preparation method of high-purity hydrochloric acid |
| CN103879964A (en) * | 2014-04-03 | 2014-06-25 | 苏州晶瑞化学有限公司 | Continuous production method of high-purity hydrochloric acid |
| CN103879964B (en) * | 2014-04-03 | 2015-09-09 | 苏州晶瑞化学股份有限公司 | A kind of continuous production method of high purity hydrochloric acid |
| CN111422833A (en) * | 2020-03-20 | 2020-07-17 | 安徽相邦化工有限公司 | Method for preparing ultra-clean high-purity hydrochloric acid by separating hydrogen chloride from hydrochloric acid-containing mother liquor |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |