CN104555945A - Production process of sulphuric acid - Google Patents
Production process of sulphuric acid Download PDFInfo
- Publication number
- CN104555945A CN104555945A CN201510008856.8A CN201510008856A CN104555945A CN 104555945 A CN104555945 A CN 104555945A CN 201510008856 A CN201510008856 A CN 201510008856A CN 104555945 A CN104555945 A CN 104555945A
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- CN
- China
- Prior art keywords
- nitrogen
- oxygen
- sulfuric acid
- sulphuric acid
- protoxide
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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
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/38—Nitric acid
- C01B21/40—Preparation by absorption of oxides of nitrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
- C01B17/775—Liquid phase contacting processes or wet catalysis processes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a production process of sulphuric acid, belonging to the field of preparation of sulphuric acid. The production process disclosed by the invention comprises the following steps: (1), compressing air; (2), carrying out fractional distillation; (3), preparing nitrogen monoxide; (4), preparing nitrogen dioxide; and (5), spraying: introducing nitrogen dioxide prepared in the step (4) into a spray tower so as to prepare sulphuric acid, wherein the spray liquid is clear water; the pressure is set to 20-30 KPa, and simultaneously, introducing generated gas in a nitrogen dioxide preparation tank in the step (4). According to the invention, the raw materials are wide in source; furthermore, generated by-products do not have pollution to the environment; the raw materials can be recycled; the preparation process is simple; the prepared sulphuric acid has high quality; and thus, the production process of sulphuric acid disclosed by the invention is applied to being popularized and applied.
Description
Technical field
The invention belongs to sulfuric acid and produce field, be specifically related to a kind of production technique of sulfuric acid.
Background technology
Sulfuric acid is a kind of strong oxidizing property, corrosive strong acid, and sulfuric acid is soluble in water, its solution water white transparency under normal temperature.Its different concns properties of Aqueous Solution is different, and the commercially available vitriol oil is constant boiling solution, and massfraction is 69.2% (about 16mol/L); Massfraction enough large (commercial concentration is up to more than 98%), be called oleum, sulfuric acid is easily shown in photolysis, should keep in Dark Place in shady place in brown bottle, forbid to contact with reductive agent, sulfuric acid is industrially main to be produced, in order to manufacture chemical fertilizer, explosive, vitriol etc. with oxidation proceses of ammonia, in organic chemistry, the mixed solution of the vitriol oil and the vitriol oil is important nitrating agent.A standard atmospheric pressure is 10132.5KPa.
At present, sulfuric acid is widely used in Chemical Manufacture, how to obtain high-purity sulfuric acid, and technique simply becomes the object that manufacturer pays close attention to, but production technique raw material sources are deficient at present, and the byproduct produced pollutes environment existence, raw material cannot be recycled, reparation technology is complicated, and obtained sulfuric acid quality is not high, needs to be further purified.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind of production technique of sulfuric acid of turning waste into wealth.
To achieve these goals, the present invention realizes by the following technical solutions:
A production technique for sulfuric acid, comprises the steps:
(1) pressurized air: air is passed in compressed tanks, control pressure is 2 ~ 3 standard atmospheric pressures, is liquid by air compressing;
(2) fractionation: the compressed liquid that step (1) obtains is passed in separation column, the temperature controlling nitrogen blanket is-145 DEG C, and the temperature controlling oxygen layer is-120 DEG C, fractionates out nitrogen and oxygen;
(3) nitrogen protoxide is prepared: the nitrogen obtain step (2) and oxygen pass into nitrogen protoxide and produces in tank, the inflow volume ratio controlling nitrogen and oxygen is 1:1, access voltage, control pressure is 1 ~ 2 mark normal atmosphere, and product collection obtains nitrogen protoxide;
(4) prepare nitrogen peroxide: nitrogen protoxide and oxygen are passed into nitrogen peroxide and produce in tank, the volume ratio controlling nitrogen protoxide and oxygen is 1:2, the obtained nitrogen peroxide of reaction;
(5) spray: the nitrogen peroxide that step (4) is obtained passes in spray column, the liquid of spray is clear water, control pressure is 20 ~ 30KPa, and obtained sulfuric acid, by the gas of generation, the nitrogen peroxide passed into described in step (4) is produced in tank simultaneously.
In the production technique of above-mentioned sulfuric acid, in described step (3), the control reaction times is 10 ~ 20min.
In the production technique of above-mentioned sulfuric acid, in described step (5), described shower nozzle is bulb sprinkler head.
Beneficial effect: through pressurized air, fractionation, prepare nitrogen protoxide, prepare nitrogen peroxide, the sulfuric acid that the large step of spray five is produced, not only raw material sources are extensive, and the byproduct environmentally safe produced, raw material can be recycled, reparation technology is simple, obtained sulfuric acid quality is high, pressurized air is as product nitrogen and produce oxygen raw material, raw material cleans, and wide material sources, fractionation produces nitrogen and oxygen, purity is high, and efficiency is high, the preparation process strict temperature control of nitrogen protoxide and nitrogen peroxide, pressure and proportioning raw materials, make product purity high, no coupling product, use spray column as product sulfuric acid reaction device, produce acid amount large, and the by product produced easily is separated, recycle better.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
Embodiment 1:
(1) pressurized air: air is passed in compressed tanks, control pressure is 2.5 standard atmospheric pressures, is liquid by air compressing;
(2) fractionation: the compressed liquid that step (1) obtains is passed in separation column, the temperature controlling nitrogen blanket is-145 DEG C, and the temperature controlling oxygen layer is-120 DEG C, fractionates out nitrogen and oxygen;
(3) nitrogen protoxide is prepared: the nitrogen obtain step (2) and oxygen pass into nitrogen protoxide and produces in tank, the inflow volume ratio controlling nitrogen and oxygen is 1:1, access voltage, control pressure is 1.5 mark normal atmosphere, product collection obtains nitrogen protoxide, and the control reaction times is 15min;
(4) prepare nitrogen peroxide: nitrogen protoxide and oxygen are passed into nitrogen peroxide and produce in tank, the volume ratio controlling nitrogen protoxide and oxygen is 1:2, the obtained nitrogen peroxide of reaction;
(5) spray: the nitrogen peroxide that step (4) is obtained passes in spray column, described shower nozzle is bulb sprinkler head, the liquid of spray is clear water, control pressure is 25KPa, obtained sulfuric acid, by the gas of generation, the nitrogen peroxide passed into described in step (4) is produced in tank simultaneously.
Embodiment 2: all the other are identical with described embodiment 1, and difference is, in described step (3), control pressure is 1 mark normal atmosphere, and the control reaction times is 10min, and in described step (5), control pressure is 20KPa.
Embodiment 3: all the other are identical with described embodiment 1, and difference is, in step (3), control pressure is 2 mark normal atmosphere, and the control reaction times is 20min, and in described step (5), control pressure is 30KPa.
In above-mentioned three embodiments, compressed air, then prepares nitrogen protoxide and nitrogen peroxide step by step, finally obtains sulfuric acid, enters test and records, and the sulfuric acid produced is not containing any impurity, and after spray, acidity can reach arbitrary value, and raw material availability is up to 90%.
The present invention is known in practical application, through pressurized air, fractionation, prepare nitrogen protoxide, prepare nitrogen peroxide, the sulfuric acid that the large step of spray five is produced, not only raw material sources are extensive, and the byproduct environmentally safe produced, raw material can be recycled, reparation technology is simple, obtained sulfuric acid quality is high, pressurized air is as product nitrogen and produce oxygen raw material, raw material cleans, and wide material sources, fractionation produces nitrogen and oxygen, purity is high, and efficiency is high, the preparation process strict temperature control of nitrogen protoxide and nitrogen peroxide, pressure and proportioning raw materials, make product purity high, no coupling product, use spray column as product sulfuric acid reaction device, produce acid amount large, and the by product produced easily is separated, recycle better.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. a production technique for sulfuric acid, is characterized in that, comprises the steps:
(1) pressurized air: air is passed in compressed tanks, control pressure is 2 ~ 3 standard atmospheric pressures, is liquid by air compressing;
(2) fractionation: the compressed liquid that step (1) obtains is passed in separation column, the temperature controlling nitrogen blanket is-145 DEG C, and the temperature controlling oxygen layer is-120 DEG C, fractionates out nitrogen and oxygen;
(3) nitrogen protoxide is prepared: the nitrogen obtain step (2) and oxygen pass into nitrogen protoxide and produces in tank, the inflow volume ratio controlling nitrogen and oxygen is 1:1, access voltage, control pressure is 1 ~ 2 mark normal atmosphere, and product collection obtains nitrogen protoxide;
(4) prepare nitrogen peroxide: nitrogen protoxide and oxygen are passed into nitrogen peroxide and produce in tank, the volume ratio controlling nitrogen protoxide and oxygen is 1:2, the obtained nitrogen peroxide of reaction;
(5) spray: the nitrogen peroxide that step (4) is obtained passes in spray column, the liquid of spray is clear water, control pressure is 20 ~ 30KPa, and obtained sulfuric acid, by the gas of generation, the nitrogen peroxide passed into described in step (4) is produced in tank simultaneously.
2. the production technique of sulfuric acid according to claim 1, is characterized in that, in described step (3), the control reaction times is 10 ~ 20min.
3. the production technique of sulfuric acid according to claim 1, is characterized in that, in described step (5), described shower nozzle is bulb sprinkler head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510008856.8A CN104555945A (en) | 2015-01-08 | 2015-01-08 | Production process of sulphuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510008856.8A CN104555945A (en) | 2015-01-08 | 2015-01-08 | Production process of sulphuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104555945A true CN104555945A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510008856.8A Pending CN104555945A (en) | 2015-01-08 | 2015-01-08 | Production process of sulphuric acid |
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| CN (1) | CN104555945A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043682A (en) * | 1990-01-17 | 1990-07-11 | 李利禄 | Empty G﹠W heating fixation of nitrogen by discharge after |
| JP2006124248A (en) * | 2004-10-29 | 2006-05-18 | Mitsubishi Electric Corp | Nitric acid manufacturing apparatus |
| CN1865130A (en) * | 2005-05-19 | 2006-11-22 | 西门子公司 | Nitric acid preparation method and device |
| CN102814056A (en) * | 2012-10-12 | 2012-12-12 | 湖北省宏源药业有限公司 | Treating method for tail gas containing nitrogen dioxide |
| EP2610214A1 (en) * | 2011-12-28 | 2013-07-03 | King Saud University | Method for converting nitrogen (N2) into ammonia and/or nitrate |
-
2015
- 2015-01-08 CN CN201510008856.8A patent/CN104555945A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043682A (en) * | 1990-01-17 | 1990-07-11 | 李利禄 | Empty G﹠W heating fixation of nitrogen by discharge after |
| JP2006124248A (en) * | 2004-10-29 | 2006-05-18 | Mitsubishi Electric Corp | Nitric acid manufacturing apparatus |
| CN1865130A (en) * | 2005-05-19 | 2006-11-22 | 西门子公司 | Nitric acid preparation method and device |
| EP2610214A1 (en) * | 2011-12-28 | 2013-07-03 | King Saud University | Method for converting nitrogen (N2) into ammonia and/or nitrate |
| CN102814056A (en) * | 2012-10-12 | 2012-12-12 | 湖北省宏源药业有限公司 | Treating method for tail gas containing nitrogen dioxide |
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Application publication date: 20150429 |