CN1011582B - Preparation of hydrochloric acid and sodium carbonate by using ammonium chloride - Google Patents
Preparation of hydrochloric acid and sodium carbonate by using ammonium chlorideInfo
- Publication number
- CN1011582B CN1011582B CN 89105502 CN89105502A CN1011582B CN 1011582 B CN1011582 B CN 1011582B CN 89105502 CN89105502 CN 89105502 CN 89105502 A CN89105502 A CN 89105502A CN 1011582 B CN1011582 B CN 1011582B
- Authority
- CN
- China
- Prior art keywords
- ammonium chloride
- ammonia
- hydrochloric acid
- temperature
- hydrogenchloride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/03—Preparation from chlorides
- C01B7/05—Preparation from ammonium chloride
- C01B7/055—Preparation of hydrogen chloride from ammonium chloride
Abstract
A little of initiator is added into sulfuric acid water solution to completely decompose ammonium chloride into hydrogen chloride and ammonia. The hydrogen chloride is absorbed by water to form hydrochloric acid of which the concentration ranges from 25 to 30%, and the recovery rate is above 95 %; ammonia is absorbed by salty water to form alkalis, and the recovery rate is above 95%.
Description
Produce a large amount of ammonium chlorides in the basic industry.And ammonium chloride is not the high-quality chemical fertilizer, so the ammonia of it being handled to reclaim wherein is used for making alkali production usually.Present most factory still uses milk of lime (Ca(OH)
2) handle, discharge behind the generation calcium chloride, with the passing of time be piled into the mountain, be commonly called as " white sea ", not only waste resource, also contaminate environment.The new recovery method of many country's researchs.
Have document to carry, the country that has uses lime carbonate and aqueous sodium persulfate solution and ammonium chloride reaction for reclaiming ammonia, make ammonia regeneration under boiling temperature, but process reaction speed is slow, NH
4The Cl rate of decomposition is low, is generally 50～80%, and ammonia recovery also has only 50～60%, deficiency in economic performance.U.S. Pat 4293532(1981.8.6) relate to the method with Production of Ammonium Chloride hydrogenchloride and ammonia in, this method generates ammonia under 150～280 ℃ temperature, and its reaction formula is as follows:
That this method is used is NH
4HSO
4, and under molten state.
The present invention uses aqueous sulfuric acid in the presence of initiator, is heated to certain temperature and makes ammonium chloride decompose generation hydrogenchloride and ammonia fully.Hydrogenchloride absorbs with clear water produces hydrochloric acid, and ammonia absorbs the generation ammoniated brine with salt solution and sends to system alkali.Concrete grammar is: with concentration is 18～75%(weight) sulfuric acid and the initiator that is made into by SODIUMNITRATE, manganous sulfate and ammonium sulfate mix, ammonium chloride is added in this solution stir then.
As three kinds of materials of initiator, its consumption is the thousandth of ammonium chloride add-on, and the ammonium chloride add-on determines according to sulfuric acid concentration and consumption, and the method for specifically determining is that to calculate by the mol ratio of two materials be NH
4Cl: H
2SO
4=1: 1-4.
Mixed liquor under agitation being heated up, just begin to have hydrogenchloride to overflow when temperature reaches 45 ℃ of left and right sides, is 5～10 ℃ clear water absorption with this gas temperature, makes concentration and be 25～33% technical hydrochloric acid; Temperature rises to 98 ℃ of left and right sides hydrogenchloride and all overflows, and can continue to heat up after checking true no hydrogenchloride to make the solution boiling, and temperature just has ammonia to overflow greatly in the time of 104 ℃, absorbs it with salt solution, makes ammoniated brine and sends to system alkali.Ammonia was all overflowed when temperature rose to 118 ℃ of left and right sides.Clearly not having the i.e. reaction of ammonia effusion through cermet of inspection finishes.Solution is cooled to about 30 ℃, add ammonium chloride more again and carry out said process.
Aqueous sulfuric acid and initiator do not change in fact in reaction process, have only some impurity and silt particle wherein residual, thus can use repeatedly, treat impurity silt particle accumulation too much or the acid solution amount can clear up and add when significantly reducing.
Embodiment 1
With 689 gram 25% sulfuric acid with as the NaNO of initiator
3, MnSO
4(NH
4) SO
4Each 0.07 gram mixes in the container of the belt stirrer of packing into, adds ammonium chloride 68.9 grams, makes it mix and all dissolvings, is heated to 45 ℃ then and begins to have HCL to overflow, and its importing is equipped with in the container of clear water to absorb, and just generates hydrochloric acid.The clear water temperature is 5～10 ℃, reaches 25～30% up to brine concentration, and hydrogenchloride has been arranged about 98 ℃.Continue heating up then begins to have ammonia to emit 104 ℃ of left and right sides solution boilings, is that 20～30 ℃ salt solution absorbs and generates ammoniated brine and send to system alkali with temperature, and temperature reaches 118 ℃ of left and right sides ammonias effusions and finishes.
Embodiment 2
Squeeze in the reactor of band stirring with 15.6 ton 25% sulfuric acid with as each 1.58 kilograms of mixing of three kinds of materials of initiator, add 1.58 tons of ammonium chlorides then, make its dissolving, be heated to then and begin to have hydrogenchloride to overflow about 45 ℃, with roots blower gas is got to that temperature is housed is that 5～10 ℃ clear water absorbs in the still, make concentration and be 25～30% hydrochloric acid, temperature reaches 98 ℃ of left and right sides HCl and has arranged.Close HCl absorption still this moment and open suction ammonia still valve, continue to heat up at 104 ℃ of left and right sides solution boiling beginning to discharge ammonias, with roots blower ammonia is got to suction ammonia still and use the salt solution for preparing in advance to absorb it, ammonia excretion finishes in the time of 118 ℃ greatly.Brine temp is 20～30 ℃, and the ammoniated brine for preparing is sent to and absorbed CO
2To produce heavy alkali.
Claims (1)
- A kind ofly produce the method for hydrogenchloride and ammonia, it is characterized in that with concentration being that the aqueous sulfuric acid of 18～75% (weight) adds SODIUMNITRATE (NaNO with ammonium chloride 3), manganous sulfate (MnSO 4) and ammonium sulfate ((NH 4) 2SO 4) in 45～118 ℃ of temperature ranges, ammonium chloride is decomposed as initiator fully, effusion hydrogenchloride when temperature is 45～98 ℃ therebetween, temperature is effusion ammonia in the time of 104～118 ℃,Three kinds of its consumptions of material as initiator are 0.1% of ammonium chloride amount, and the sulfuric acid consumption determines that according to the ammonium chloride amount its mol ratio is NH 4Cl: H 2SO 4=1: 1～4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105502 CN1011582B (en) | 1989-08-15 | 1989-08-15 | Preparation of hydrochloric acid and sodium carbonate by using ammonium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105502 CN1011582B (en) | 1989-08-15 | 1989-08-15 | Preparation of hydrochloric acid and sodium carbonate by using ammonium chloride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1038997A CN1038997A (en) | 1990-01-24 |
| CN1011582B true CN1011582B (en) | 1991-02-13 |
Family
ID=4856234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105502 Expired CN1011582B (en) | 1989-08-15 | 1989-08-15 | Preparation of hydrochloric acid and sodium carbonate by using ammonium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011582B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944291B (en) * | 2006-10-17 | 2010-12-29 | 自贡鸿鹤化工股份有限公司 | Method for teating heavy alkali filter liquid in synthesizing alkali producing method |
| CN102992268A (en) * | 2012-10-31 | 2013-03-27 | 四川大学 | Technology for producing hydrogen chloride by using calcium chloride and sulfuric acid |
| CN106882767B (en) * | 2017-01-16 | 2019-03-12 | 淮阴师范学院 | A kind of novel chloride and strong sulfuric acid response for hydrogen chloride preparation from rate controlling with from stirred reactor and method |
| CN112499587A (en) * | 2020-11-30 | 2021-03-16 | 洪湖市一泰科技有限公司 | Synergistic treatment method for by-products generated in production process of methyldichlorophosphine and diethyl methylphosphonite |
-
1989
- 1989-08-15 CN CN 89105502 patent/CN1011582B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1038997A (en) | 1990-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 19941104 Decision number of declaring invalidation: 508 |