CN100335405C - Analytical pure sulfuric acid production process - Google Patents
Analytical pure sulfuric acid production process Download PDFInfo
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- CN100335405C CN100335405C CNB200510018925XA CN200510018925A CN100335405C CN 100335405 C CN100335405 C CN 100335405C CN B200510018925X A CNB200510018925X A CN B200510018925XA CN 200510018925 A CN200510018925 A CN 200510018925A CN 100335405 C CN100335405 C CN 100335405C
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- sulfuric acid
- pure sulfuric
- analytical pure
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Abstract
The present invention relates to technology for producing analytically pure sulfuric acid, which belongs to a method for producing analytically pure sulfuric acid and mainly solves the problems of high production cost because of high power consumption, poor production capacity of a single device and environment pollution which exist in the existing method for producing analytically pure sulfuric acid. The present invention is characterized in that sulfur trioxide gas with high concentration is used as feed gas to be condensed by a condenser, and sulfur trioxide condensed into liquid is distilled into gas and then is sent into an absorbing tower to be absorbed, wherein analytically pure sulfuric acid is used as absorbing liquid. Soft water is adopted to regulate the concentration of the sulfuric acid, and then, air is used for absorption. Sulfur dioxide dissolved in products is absorbed and removed, certificated products are sent to a finished product warehouse, and analytically pure sulfuric acid is obtained. The present invention changes the traditional sulfuric acid distilling method into the synthesis method of sulfur trioxide gas and water to produce analytically pure sulfuric acid and has the advantages of greatly lowering the energy consumption to lower the product cost and realizing large-scale industrialized production.
Description
Technical field
The invention belongs to the production method of analytical pure sulfuric acid, specifically a kind of with high-concentration sulfur trioxide gas as unstripped gas, produce the method for analytical pure sulfuric acid by synthesis method.
Background technology
The method of domestic production analytical pure sulfuric acid is to adopt distillation method at present, promptly be that raw material is produced analytical pure sulfuric acid by the mode of distilling purification with the industrial sulphuric acid, this method adopting quartz glass device, production process is a batch production, main deficiency has: 1. because the vitriolic boiling point is 330 ℃, thus high because of distilling the high product cost that causes of energy consumption.The power consumption that uses simple glass equipment ton finished product is up to 1000～2000kWh.Although people have carried out a large amount of improvements with regard to energy-saving and cost-reducing on distillation method technology in recent years, electrically heated, coal heating batch production method, electrical heating continuous charging method, electrically heated silica glass device method of purification, microcirculation economic benefits and social benefits working system etc. are arranged.The silica glass device production best with present domestic energy consumption level is example, and the power consumption of its ton analytical pure sulfuric acid is about 550kWh, and product cost is 940～1000 yuan/ton.2. single device throughput is little.The day throughput of every complete equipment is 0.05～0.1 ton of analytical pure sulfuric acid, and the domestic present fairly large separate unit complete equipment use of still not having improves output and can only lean on many parallel connections, and this gives in operation, the equipment control has increased difficulty; Equipment is badly broken after for some time uses and cleans, and has also increased production cost virtually.3. sulfur dioxide gas, sulfuric acid mist etc. directly enter atmosphere when distillation, contaminate environment not only, and to operator's health damage, the acceleration equipment corrosion.The acid of tail after the distillation since the foreign matter content height still need and deal with in addition.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can significantly cut down the consumption of energy and then reduce product cost, and can realize the analytical pure sulfuric acid production process of large-scale industrial production.
The present invention is achieved in that with high-concentration sulfur trioxide gas and carries out condensation as unstripped gas by condenser, the sulphur trioxide distillation that is condensed into liquid become send into the absorption tower behind the gas and absorb, wherein, absorption liquid adopts analytical pure sulfuric acid, and the concentration of regulating acid with soft water, in desorption tower, product is taken off suction with air then, take off and suck out and remove, send into stockyard through the product that is up to the standards and promptly obtain analytical pure sulfuric acid being dissolved in sulfurous gas in the product.
The temperature of above-mentioned condensation is 30-40 ℃, and described distillatory temperature is 60-80 ℃.
Said distillation is to carry out in glassed steel reaction vessels.
The present invention, will utilize qualified analytical pure sulfuric acid to absorb sulphur trioxide as absorption liquid and produce analytical pure sulfuric acid through the sulphur trioxide after condensation, distillation are purified as unstripped gas with high-concentration sulfur trioxide gas, and its reaction formula is: SO
3+ H
2O=H
2SO
4And replenish the sour concentration of pure water control in right amount, absorption process is with stronger heat release.This production technique changes the synthesis method production analytical pure sulfuric acid that traditional sulfuric acid distillation method is sulfur trioxide gas+water, is the production analytical pure sulfuric acid a new operational path is provided, and has the following advantages:
1. the ton product energy consumption significantly reduces, thereby significantly reduces production costs.Because changing distillating industries sulfuric acid, this production technique produces analytical pure sulfuric acid for the vaporised liquid sulphur trioxide, and the boiling point of sulfan (43.5 ℃) is gone up to analytical pure sulfuric acid production cuts down the consumption of energy significantly with practice theoretically possibility is provided well below vitriolic boiling point (330 ℃).Can be with 70 ℃ hot water as thermal source, the energy consumption of this technology is about 1/10th (power consumption of ton analytical pure sulfuric acid is 60KWh) of traditional technology, a ton products production cost 1/3rd (they being 667 yuan/ton) that descend approximately.
2. enhance production capacities.Overcome traditional silica glass distillation method small scale, the situation that device is in parallel changes glass-lined equipment production into, and the production capacity of a cover industrialized unit reaches 3000 tons/year, also can further increase according to the single cover of market requirement production equipment throughput.And the scale operation device is easier to the maintenance and management of device, really realizes the suitability for industrialized production of analytical pure sulfuric acid.
3. protection environment.Production process is totally-enclosed, and no waste residue, waste gas, waste water produce, and online monitoring instrument can be installed, and are implemented in operation room red-tape operati process.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Further specify the present invention below in conjunction with drawings and Examples.
Embodiment: get 800kg high-concentration sulfur trioxide gas and under 30-40 ℃ of temperature, be condensed into liquid by condenser as unstripped gas, the sulphur trioxide distillation that will be condensed into liquid with glassed steel reaction vessels under 60-80 ℃ of temperature becomes gas and sends into the absorption tower absorption, absorption liquid is qualified analytical pure sulfuric acid, regulate the concentration of analytical pure sulfuric acid with soft water, in desorption tower, the bleed negative pressure that produces of product utilization vacuum pump is replenished air and taken off suction then, the sulfurous gas that is dissolved in the product is taken off suck out and remove (getting back to industrial sulphuric acid production system or otherwise processed), send into stockyard through the product that is up to the standards and promptly obtain about 1000kg analytical pure sulfuric acid.
Claims (3)
1, a kind of analytical pure sulfuric acid production process, it is characterized in that carrying out condensation as unstripped gas by condenser with high-concentration sulfur trioxide gas, the sulphur trioxide distillation that is condensed into liquid become send into the absorption tower behind the gas and absorb, wherein, absorption liquid adopts analytical pure sulfuric acid, and the concentration of regulating acid with soft water, in desorption tower, product is taken off suction with air then, take off and suck out and remove being dissolved in sulfurous gas in the product, send into stockyard through the product that is up to the standards and promptly obtain analytical pure sulfuric acid.
2, by the described a kind of analytical pure sulfuric acid production process of claim 1, the temperature that it is characterized in that described condensation is 30-40 ℃, and described distillatory temperature is 60-80 ℃.
3, by claim 1 or 2 described a kind of analytical pure sulfuric acid production process, it is characterized in that described distillation is to carry out in glassed steel reaction vessels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510018925XA CN100335405C (en) | 2005-06-16 | 2005-06-16 | Analytical pure sulfuric acid production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510018925XA CN100335405C (en) | 2005-06-16 | 2005-06-16 | Analytical pure sulfuric acid production process |
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| Publication Number | Publication Date |
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| CN1699146A CN1699146A (en) | 2005-11-23 |
| CN100335405C true CN100335405C (en) | 2007-09-05 |
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| CNB200510018925XA Expired - Fee Related CN100335405C (en) | 2005-06-16 | 2005-06-16 | Analytical pure sulfuric acid production process |
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| CN (1) | CN100335405C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8303925B2 (en) | 2010-06-29 | 2012-11-06 | Asian Union Electronic Chemical Corp. Shanghai | Manufacture method of ultra-pure sulfuric acid |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092235B (en) * | 2006-06-19 | 2010-08-25 | 上海华谊集团上硫化工有限公司 | Method for preparing reagent of sulfuric acid by using liquid of sulfur trixide and deionized water |
| CN101327914B (en) * | 2008-07-16 | 2012-09-26 | 贺广浩 | Tail gas recycled sulfur trioxide wet gas high concentrated low temperature absorption acid making process |
| TWI481550B (en) * | 2013-05-01 | 2015-04-21 | Asia Union Electronic Chemical Corp | Method for manufacturing high purity sulfuric acid |
| CN105947994B (en) * | 2016-04-29 | 2018-10-09 | 上海京藤化工有限公司 | A kind of process units and production method of MOS grades of sulfuric acid of microelectronics |
| CN106219498A (en) * | 2016-07-26 | 2016-12-14 | 金川集团股份有限公司 | The removing means of free sulfur trioxide gas in a kind of oleum |
| CN109911866A (en) * | 2019-04-08 | 2019-06-21 | 江苏中德电子材料科技有限公司 | A kind of environment-friendly and energy-efficient ultra-clean and high-purity sulphuric acid production equipment and process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077433A (en) * | 1993-05-06 | 1993-10-20 | 沈阳冶炼厂 | Be condensed into sour technology in the gas washing in SA production |
| US5538707A (en) * | 1994-03-01 | 1996-07-23 | Monsanto Company | Acid concentration control in SO3 absorption |
| US6287534B1 (en) * | 1994-03-28 | 2001-09-11 | Ping Wha Lin | Method for manufacturing sulfuric acid |
| CN1355132A (en) * | 2000-12-01 | 2002-06-26 | 余振耀 | Process for preparing sulfuric acid |
-
2005
- 2005-06-16 CN CNB200510018925XA patent/CN100335405C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077433A (en) * | 1993-05-06 | 1993-10-20 | 沈阳冶炼厂 | Be condensed into sour technology in the gas washing in SA production |
| US5538707A (en) * | 1994-03-01 | 1996-07-23 | Monsanto Company | Acid concentration control in SO3 absorption |
| US6287534B1 (en) * | 1994-03-28 | 2001-09-11 | Ping Wha Lin | Method for manufacturing sulfuric acid |
| CN1355132A (en) * | 2000-12-01 | 2002-06-26 | 余振耀 | Process for preparing sulfuric acid |
Non-Patent Citations (2)
| Title |
|---|
| 国外硫酸工艺技术进展 郭景芝，化工生产与技术，第10卷第3期 2003 * |
| 超纯硫酸的生产与应用现状 纪罗军等，硫酸工业，第2期 2004 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8303925B2 (en) | 2010-06-29 | 2012-11-06 | Asian Union Electronic Chemical Corp. Shanghai | Manufacture method of ultra-pure sulfuric acid |
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| CN1699146A (en) | 2005-11-23 |
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Granted publication date: 20070905 Termination date: 20130616 |