CN1699146A - Analytical pure sulfuric acid production process - Google Patents
Analytical pure sulfuric acid production process Download PDFInfo
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- CN1699146A CN1699146A CN 200510018925 CN200510018925A CN1699146A CN 1699146 A CN1699146 A CN 1699146A CN 200510018925 CN200510018925 CN 200510018925 CN 200510018925 A CN200510018925 A CN 200510018925A CN 1699146 A CN1699146 A CN 1699146A
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Abstract
Disclosed is an analytical pure sulfuric acid production process which comprises using high concentration sulfur trioxide gas as raw material gas, passing through condenser for condensation, distilling sulfur trioxide in the form of condensed fluid into gas, loading into absorption column for absorption, wherein the absorption solution employs analytical pure sulfuric acid, soft water is utilized for adjusting acid concentration, then the product is subject to desorption with air in a desorption tower, thus removing the sulfur dioxide dissolved in the product, the examined specification product is then loaded into finished products warehouse.
Description
Technical Field
The invention belongs to a production method of analytically pure sulfuric acid, and particularly relates to a method for producing analytically pure sulfuric acid by using high-concentration sulfur trioxide gas as a raw material gas through a synthesis method.
Background
At present, the domestic method for producing analytically pure sulfuric acid adopts a distillation method, namely, the analytically pure sulfuric acid is produced by taking industrial sulfuric acid as a raw material through a distillation purification mode, a quartz glass device is adopted in the method, the production process is intermittent production, and the main defects are as follows: 1. the boiling point of the sulfuric acid is 330 ℃, so that the product cost is high due to high distillation energy consumption. The power consumption of the finished product of each ton of common glass equipment is up to 1000-2000 kWh. Although people carry out a great deal of improvement work on energy conservation and consumption reduction on the distillation process in recent years, the distillation process comprises an electric heating method, a coal heating intermittent production method, an electric heating continuous feeding method, an electric heating quartz glass device purification method, a microcirculation double-effect production method and the like. Taking the production of the quartz glass device with the best energy consumption level in China at present as an example, the power consumption of the analytically pure sulfuric acid per ton is about 550kWh, and the product cost is 940-1000 yuan per ton. 2. The production capacity of a single device is small. The daily production capacity of each set of equipment is 0.05-0.1 ton of analytically pure sulfuric acid, no large-scale single set of equipment is used at present in China, the yield is improved only by connecting a plurality of sets in parallel, and the difficulty is increased on operation and equipment management; the equipment is seriously damaged after being used for a period of time and cleaned, and the production cost is also increased invisibly. 3. Sulfur dioxide gas, sulfuric acid mist and the like are directly discharged into the atmosphere during distillation, so that the environment is polluted, the body of an operator is damaged, and the corrosion of equipment is accelerated. The tail acid after distillation needs additional treatment due to high impurity content.
Disclosure of Invention
The invention aims to provide an analytically pure sulfuric acid production process which can greatly reduce energy consumption, further reduce product cost and realize large-scale industrial production.
The invention is realized by the following steps: the method comprises the steps of condensing high-concentration sulfur trioxide gas serving as raw material gas through a condenser, distilling the condensed liquid sulfur trioxide into gas, and then sending the gas into an absorption tower for absorption, wherein analytically pure sulfuric acid is adopted as absorption liquid, the acid concentration is adjusted through soft water, then desorbing the product with air in the desorption tower, desorbing and removing sulfur dioxide dissolved in the product, and sending the qualified product into a finished product warehouse to obtain the analytically pure sulfuric acid.
The condensing temperature is 30-40 ℃, and the distilling temperature is 60-80 ℃.
The distillation is carried out in a glass lining reaction kettle.
The invention takes high-concentration sulfur trioxide gas as raw material gas, and condenses, distills and purifies the raw material gasSulfur oxide, using qualified analytically pure sulfuric acid as absorption liquid to absorb sulfur trioxide to produce analytically pure sulfuric acid, wherein the reaction formula is as follows: and pure water is supplemented in a proper amount to control the concentration of acid, and the absorption process is accompanied with stronger heat release. The production process changes the traditional sulfuric acid distillation method into a method for synthesizing sulfur trioxide gas and water to produce analytically pure sulfuric acid, provides a new process route for producing analytically pure sulfuric acid, and has the following advantages:
1. the energy consumption of the ton product is greatly reduced, thereby greatly reducing the production cost. Because the production process changes the distillation of industrial sulfuric acid into the evaporation of liquid sulfur trioxide to produce analytically pure sulfuric acid, and the boiling point (43.5 ℃) of the liquid sulfur trioxide is far lower than the boiling point (330 ℃) of the sulfuric acid, the production process theoretically and practically provides possibility for greatly reducing energy consumption for the analytically pure sulfuric acid production. Hot water with the temperature of 70 ℃ can be used as a heat source, the energy consumption of the process is about one tenth of that of the traditional process (the electricity consumption of each ton of analytically pure sulfuric acid is 60KWh), and the production cost of each ton of products is reduced by about one third (667 yuan/ton).
2. The productivity is expanded. The method overcomes the defects that the traditional quartz glass distillation method has small scale and the devices are connected in parallel, changes the production of glass lining equipment into production, has the capacity of one set of industrialized device reaching 3000 tons/year, and can further increase the production capacity of a single set of production device according to market demands. And the large-scale production device is easier to maintain and manage the device, and the industrial production of analytically pure sulfuric acid is really realized.
3. And the environment is protected. The production process is totally closed, no waste residue, waste gas and waste water are generated, and an online monitoring instrument can be installed to realize the control of the operation process in an operation room.
Drawings
The attached drawing is a process flow block diagram of the invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example (b): taking 800kg of high-concentration sulfur trioxide gas as a raw material gas, condensing the gas into liquid at the temperature of 30-40 ℃ through a condenser, distilling the condensed liquid sulfur trioxide into gas at the temperature of 60-80 ℃ through a glass lining reaction kettle, sending the gas into an absorption tower for absorption, adjusting the concentration of the analytically pure sulfuric acid by using soft water, desorbing the product in a desorption tower by using negative pressure supplementary air generated by air suction of a vacuum pump, desorbing and removing sulfur dioxide dissolved in the product (returning to an industrial sulfuric acid production system or performing additional treatment), and sending the qualified product after inspection into a finished product warehouse to obtain about 1000kg of analytically pure sulfuric acid.
Claims (3)
1. A process for preparing analytically pure sulfuric acid features that the high-concentration sulfur trioxide gas is condensed by condenser to obtain gas, the liquid sulfur trioxide is distilled to obtain gas, which is then absorbed by absorption tower, the analytically pure sulfuric acid is used as absorption liquid and the acid concentration is regulated by soft water, the product is desorbed by air in desorption tower, the sulfur dioxide dissolved in the product is desorbed and removed, and the qualified product is delivered to finished product warehouse.
2. A process according to claim 1, wherein said condensing temperature is from 30 ℃ to 40 ℃ and said distilling temperature is from 60 ℃ to 80 ℃.
3. A process for the production of analytically pure sulfuric acid according to claim 1 or 2, characterized in that the distillation is carried out in a glass-lined reactor.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1699146A true CN1699146A (en) | 2005-11-23 |
| CN100335405C CN100335405C (en) | 2007-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (7)
| 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 |
| CN101891161A (en) * | 2010-06-29 | 2010-11-24 | 上海华谊微电子材料有限公司 | Preparation method of ultra-pure sulfuric acid |
| 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 |
| CN104129762A (en) * | 2013-05-01 | 2014-11-05 | 联仕电子化学材料股份有限公司 | Preparation method and preparation system of high-purity sulfuric acid solution |
| CN105947994A (en) * | 2016-04-29 | 2016-09-21 | 上海京藤化工有限公司 | Production device and production method for MOS-grade sulfuric acid used for 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 |
Family Cites Families (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 |
| CN1177756C (en) * | 2000-12-01 | 2004-12-01 | 余振耀 | Process for preparing sulfuric acid |
-
2005
- 2005-06-16 CN CNB200510018925XA patent/CN100335405C/en not_active Expired - Fee Related
Cited By (10)
| 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 |
| CN101891161A (en) * | 2010-06-29 | 2010-11-24 | 上海华谊微电子材料有限公司 | Preparation method of ultra-pure sulfuric acid |
| CN104129762A (en) * | 2013-05-01 | 2014-11-05 | 联仕电子化学材料股份有限公司 | Preparation method and preparation system of high-purity sulfuric acid solution |
| US9926198B2 (en) | 2013-05-01 | 2018-03-27 | Asia Union Electronic Chemical Corp. | Method for manufacturing high purity sulfuric acid |
| US10351427B2 (en) | 2013-05-01 | 2019-07-16 | Asia Union Electronic Chemical Corp. | System for manufacturing high purity sulfuric acid |
| CN105947994A (en) * | 2016-04-29 | 2016-09-21 | 上海京藤化工有限公司 | Production device and production method for MOS-grade sulfuric acid used for microelectronics |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN100335405C (en) | 2007-09-05 |
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Granted publication date: 20070905 Termination date: 20130616 |