CN1113878A - Producing method for sulfuric acid, nitric acid and hydrochloric acid - Google Patents
Producing method for sulfuric acid, nitric acid and hydrochloric acid Download PDFInfo
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- CN1113878A CN1113878A CN 94110617 CN94110617A CN1113878A CN 1113878 A CN1113878 A CN 1113878A CN 94110617 CN94110617 CN 94110617 CN 94110617 A CN94110617 A CN 94110617A CN 1113878 A CN1113878 A CN 1113878A
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- gas
- acid
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- nitric acid
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Abstract
The present invention relates to a production method of sulfuric acid, nitric acid and hydrochloric acid, belonging to the field of chemical production. Said invention replaces air by pure oxygen as raw material to produce sulfuric acid and nitric acid, and uses the circulation method to produce sulfuric acid, nitric acid and chlorhydric acid, so that its acid yield is raised, and its environmental pollution can be controlled, and its production process is simplified.
Description
The present invention is the production method of sulfuric acid, nitric acid, hydrochloric acid, belongs to chemical production field.
The production method of known sulfuric acid, nitric acid, hydrochloric acid is a flow-through method, be raw material directly emptying after reaction, absorption, this method not only need be handled a large amount of materials, adopt huge equipment, and cut whole emptying of final gas behind the direct current, not only discharge a large amount of gas contamination environment, reduce and cut the yield that makes acid.The objective of the invention is to adopt circulation method to produce sulfuric acid, nitric acid, hydrochloric acid production unit is reduced, emission gases contaminate environment not basically, and the yield of acid is improved, the working of an invention method is as follows:
The present invention adopts known roasting pyrite system sulfuric acid, the method for preparing nitric acid by ammonia oxidation, chlorine and hydrogen reaction salt manufacturing acid, the present invention in process of production, the tail gas in the atmosphere of entering that makes that end reaction absorb to obtain follows back and is reused for relieving haperacidity.For this reason, 1, in the gas washing in SA production, adopt to contain N
2Gas 0-60%(weight content) pure oxygen or oxygen-rich air following current successively flow into placed in-line 1-5 sulfurous iron ore oxidizing roasting stove and carry out the roasting of sulfurous iron ore, and the Outlet Gas Temperature of each stove is 600-1500 ℃, and this high temperature is used to produce steam and generating.Gas after roasting pyrite finishes enters the converter evolution after treatment and transforms, and makes the SO that contains in the gas
250-100% is converted into SO3, and the gas after the conversion is absorbed the system vitriol oil, makes the SO in the gas after the absorption
350-100% is converted into sulfuric acid product, and the final tail gas of gained returns pyrite burning stokehold and oxygen or returns SO after heat up pressurization or injected attraction
2Preceding and the SO of converter
2Furnace gas or return SO
3Before the absorption tower and SO
3Furnace gas recycles after mixing.Since contain part nitrogen in the oxygen that uses in the production process, therefore, N in the gas in process of production
2Content increase gradually, when a nitrogen content reached certain numerical value, the final tail gas emptying after treatment behind the discharge unit sulfuric acid absorption tower was certain numerical value with the content of keeping nitrogen in the recycle gas in the production process.
2, in nitric acid production, adopt to contain N
2Gas 0-60%(weight content) the rich N that pure oxygen or oxygen-rich air and aftermentioned are followed back
2Tail gas and raw material ammonia mix, the composition of gas mixture should not have explosion hazard in process of production, the enough big so that mixed gas of this amount that should make the rich nitrogen tail gas that follows is back formed and is changed and lose the blast ability, mixed gas following current successively flows into a placed in-line 1-5 converter for ammonia oxidation and carries out oxidative ammonolysis, the Outlet Gas Temperature of each stove is 600-1500 ℃, this high temperature is used to produce steam and generating, after gas after the oxidation and oxygen or the oxygen-rich air mixing oxidation, enter nitric acid absorption tower, make the oxynitride 50-100% in the gas be converted into rare nitric acid, recycle with oxides of nitrogen gas is mixed with reactant gases or before returning the nox adsorption tower tail gas after the absorption returns converter for ammonia oxidation after heat up pressurization or injected attraction before.The content of the GN 2 is in process of production kept certain numerical value, so that mix elimination owing to the explosion hazard that uses oxygen-rich air or pure oxygen to cause with reactant gases before making abundant rich nitrogen tail gas return oxidized still.And be tail gas amount when excessive when nitrogen content in the gas in the production process surpasses above-mentioned certain numerical value, final tail gas behind the discharge unit absorption tower makes the nitrogen content of the gas in the production process keep above-mentioned certain numerical value.
3, in hydrochloric acid is produced, with Cl in the existing synthetic hydrochloric acid production
2, H
2After synthetic hydrochloric acid gas 50-100% absorbs, after heat up pressurization or injection attract, return before the hydrochloric acid synthetic furnace and Cl
2Or H
2Mix; Or return before the hydrochloric acid absorption tower with after HCl gas mixes and recycle, do not discharge tail gas basically.
In the present and future of environment protection increasingly stringent, this flow process suits.
Claims (1)
1, the production method of sulfuric acid, nitric acid, hydrochloric acid is characterized in that:
Adopt known roasting pyrite system sulfuric acid, preparing nitric acid by ammonia oxidation, the method for chlorine and hydrogen reaction salt manufacturing acid.In process of production, the tail gas that end reaction is obtained follows back and is reused for relieving haperacidity.For this reason, in gas washing in SA production, adopt to contain N
2The pure oxygen of gas 0-60% (weight) or oxygen-rich air following current successively flow into placed in-line 1-5 sulfurous iron ore oxidizing roasting stove and carry out the roasting of sulfurous iron ore, the Outlet Gas Temperature of each stove is 600-1500 ℃, gas after roasting finishes enters converter after treatment, makes SO wherein
250-100% is converted into SO
3, the SO in the gas
350-100% is converted into sulfuric acid in sulfuric acid absorption tower, and final tail gas returns pyrite burning stokehold and oxygen or returns SO after heat up pressurization or injected attraction
2Preceding and the SO of converter
2Furnace gas or return SO
3Before the absorption tower and SO
3Furnace gas recycles after mixing.Tail gas behind the discharge unit sulfuric acid absorption tower, treated emptying is certain numerical value with the content of keeping nitrogen in the gas in the production process.In nitric acid production, adopt to contain N
2The pure oxygen of gas 0-60% (weight content) or oxygen-rich air with after rich nitrogen tail gas and ammonia mix successively following current flow into a placed in-line 1-5 converter for ammonia oxidation and carry out oxidative ammonolysis, the Outlet Gas Temperature of each stove is 600-1500 ℃, the mixed laggard nitric acid absorption tower of going into of gas after the oxidation and oxygen or oxygen-rich air, make the oxynitride 50-100% in the gas be converted into rare nitric acid, the tail gas after the absorption recycles with reactant gases or before returning the nox adsorption tower with after oxides of nitrogen gas mixes return converter for ammonia oxidation after heat up pressurization or injected attraction before.Final tail gas emptying after treatment behind the discharge unit nitric acid absorption tower is certain numerical value with the content of nitrogen in the gas of keeping production process.In hydrochloric acid is produced, with CL in the existing synthetic hydrochloric acid production
2, H
2Synthetic HCL gas 50-100% absorbs after return before the hydrochloric acid synthetic furnace and CL after heat up pressurization or the injection absorption
2Or H
2Mix, or return before the hydrochloric acid absorption tower with after HCL gas mixes and recycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110617 CN1113878A (en) | 1994-06-01 | 1994-06-01 | Producing method for sulfuric acid, nitric acid and hydrochloric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110617 CN1113878A (en) | 1994-06-01 | 1994-06-01 | Producing method for sulfuric acid, nitric acid and hydrochloric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1113878A true CN1113878A (en) | 1995-12-27 |
Family
ID=5034565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94110617 Pending CN1113878A (en) | 1994-06-01 | 1994-06-01 | Producing method for sulfuric acid, nitric acid and hydrochloric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1113878A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393611C (en) * | 2003-01-18 | 2008-06-11 | 赫多特普索化工设备公司 | Process of condensing sulfuric acid vapor for producing sulfuric acid |
| CN101575089B (en) * | 2009-06-10 | 2010-12-29 | 上海化工研究院 | Method for preparing <18>O-nitric acid |
| CN106744746A (en) * | 2017-02-17 | 2017-05-31 | 交城县金兰化工有限公司 | A kind of nitric acid preparation method of environment-friendly high-efficiency |
| CN109516445A (en) * | 2018-12-05 | 2019-03-26 | 四川大学 | Electrolysis water and air separation are combined the closed circulation process of nitric acid processed |
-
1994
- 1994-06-01 CN CN 94110617 patent/CN1113878A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393611C (en) * | 2003-01-18 | 2008-06-11 | 赫多特普索化工设备公司 | Process of condensing sulfuric acid vapor for producing sulfuric acid |
| CN101575089B (en) * | 2009-06-10 | 2010-12-29 | 上海化工研究院 | Method for preparing <18>O-nitric acid |
| CN106744746A (en) * | 2017-02-17 | 2017-05-31 | 交城县金兰化工有限公司 | A kind of nitric acid preparation method of environment-friendly high-efficiency |
| CN109516445A (en) * | 2018-12-05 | 2019-03-26 | 四川大学 | Electrolysis water and air separation are combined the closed circulation process of nitric acid processed |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |