ES367381A1 - Procedure for the continuous separation of acrylonitrile and acetonitrile. (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for the continuous separation of acrylonitrile and acetonitrile. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES367381A1 ES367381A1 ES367381A ES367381A ES367381A1 ES 367381 A1 ES367381 A1 ES 367381A1 ES 367381 A ES367381 A ES 367381A ES 367381 A ES367381 A ES 367381A ES 367381 A1 ES367381 A1 ES 367381A1
- Authority
- ES
- Spain
- Prior art keywords
- column
- acetonitrile
- water
- extractive distillation
- acrylonitrile
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Procedure for the continuous separation of acrylonitrile and acetonitrile, which have been obtained in the reaction of propylene with ammonia and oxygen, or air, by absorption of water-soluble reaction products, direct introduction of the absorption solution into a column of extractive distillation with water, as extraction agent, obtaining the acetonitrile-free acrylonitrile from the head of the extractive distillation column, ejecting the fraction containing acetonitrile from the lower part of the extractive distillation column, as a lateral stream, and separation of the azeotropic acetonitrile from the main quantity of water in an ejection stage following the extractive distillation, characterized in that in the extractive distillation, the introduction of the mixture to be separated is carried out in the upper half of the column, preferably a column of dishes, and the branch of the lateral stream, which contains ace tonitrile, is carried out at least above the 10th plate of the column from below, preferably above the 15th plate of the column from below, this part of the column, below the branch of the lateral stream, represents at most half of the total height of the column and between the place of feeding of the mixture to be separated and the outlet of the lateral stream are at least 3, preferably at least 5 plates, the flow rate of the lateral stream being selected so great that in the tail of the extractive distillation column is obtained so much water free of acrylonitrile and practically free of acetonitrile, as extraction water is needed at the head of the extractive distillation column and this water is fed, as extraction agent, in the head of the column after a corresponding graduation of the temperature by cooling, while the water, that after the ejection of the quantity princ ipal of acetonitrile is obtained in the tail of the ejection column and containing at least 300 ppm of acetonitrile, is fed; also after the corresponding temperature graduation, to the absorption of the water-soluble reaction products of the synthesis of acrylonitrile. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT481368A AT280235B (en) | 1968-05-20 | 1968-05-20 | Process for the continuous separation of acrylonitrile and acetonitrile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES367381A1 true ES367381A1 (en) | 1971-04-01 |
Family
ID=3568657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES367381A Expired ES367381A1 (en) | 1968-05-20 | 1969-05-19 | Procedure for the continuous separation of acrylonitrile and acetonitrile. (Machine-translation by Google Translate, not legally binding) |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT280235B (en) |
| CS (1) | CS154272B2 (en) |
| ES (1) | ES367381A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2552233A1 (en) * | 1975-11-21 | 1977-06-02 | Standard Oil Co Ohio | (Meth)acrylonitrile recovery and purificn from ammoxidn effluent - with recycle of prod column bottoms to form quench liq in quench system |
-
1968
- 1968-05-20 AT AT481368A patent/AT280235B/en not_active IP Right Cessation
-
1969
- 1969-05-19 ES ES367381A patent/ES367381A1/en not_active Expired
- 1969-05-20 CS CS357869A patent/CS154272B2/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS154272B2 (en) | 1974-03-29 |
| AT280235B (en) | 1970-04-10 |
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