SU146734A1 - Method for separating ethylene chlorohydrin from its azeotrope with water - Google Patents
Method for separating ethylene chlorohydrin from its azeotrope with waterInfo
- Publication number
- SU146734A1 SU146734A1 SU696146A SU696146A SU146734A1 SU 146734 A1 SU146734 A1 SU 146734A1 SU 696146 A SU696146 A SU 696146A SU 696146 A SU696146 A SU 696146A SU 146734 A1 SU146734 A1 SU 146734A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- water
- ethylene chlorohydrin
- azeotrope
- separating ethylene
- nitromethane
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Известен способ выделени этиленхлоргидрина из его водного азеотропа обезвоживанием последнего азеотропной перегонкой с органическим экстрагентом, например с дихлорэтаном. Однако с дихлорэтаном тер етс и некоторое количество этиленхлоргидрина. Дл предотвращени потерь основного продукта приходитс усложн ть технологическую схему обезвоживани введением дополнительной дистилл ционной колонны.There is a method for isolating ethylene chlorohydrin from its aqueous azeotrope by dehydrating the latter by azeotropic distillation with an organic extractant, for example dichloroethane. However, some ethylene chlorohydrin is lost with dichloroethane. To prevent the loss of the main product, it is difficult to dehydrate the flow chart by introducing an additional distillation column.
Предлагаемый способ выделени этиленхлоргидрина из его азеотропа с водой лишен указанного недостатка и тем самым упрощает процесс. Он заключаетс в обезвоживании азеотропа этиленхлоргидрин - вода азеотропной перегонкой с органическим экстрагентом, не образующим тройной нераздельнокип щей смеси с водой и этиленхлоргидрином . В кнчестве таких экстрагентов могут быть использованы, например , нитрометан, диизопропиловый эфир.The proposed method for isolating ethylene chlorohydrin from its azeotrope with water is devoid of this disadvantage and thus simplifies the process. It consists in dehydrating the azeotrope of ethylene chlorohydrin — water by azeotropic distillation with an organic extractant that does not form a triple non-separable mixture with water and ethylene chlorohydrin. In particular, such extractants can be used, for example, nitromethane, diisopropyl ether.
Пример 1. В куб ректификационной колонны периодического действи загружают .1000 кг водного раствора этиленхлоргидрина, содержащего 57,5% вес. последнего, и 400 кг нитрометана- После доведени колонны до равновеси начинают отбор верхнего вод ного сло , получающегос при расслаивании гетероазеотропа нитрометан-вода, имеющего температуру кипени 83,6° и содержащего 54,8% мол. воды. После отбора около 470 кг указанного верхнего сло , состо щего приблизительно из 90% вес. воды и 10% вес. нитрометана, отбирают фракцию, представл ющую собой практически чистый нитрометан. Затем отбирают небольшую промежуточную фракцию смеси нитрометана и этиленхлоргидрина . В кубе колонны остаетс практически чистый этиленхлоргидрин .Example 1. A 1,000 kg of an ethylene chlorohydrin aqueous solution containing 57.5% by weight is loaded into a cube of a batch distillation column. the latter, and 400 kg of nitromethane. After the column is brought to equilibrium, the removal of the upper water layer, which is obtained by stratifying the nitromethane-water heteroazeotrope, having a boiling point of 83.6 ° and containing 54.8 mol%, begins. water. After collection, about 470 kg of said upper layer consisting of approximately 90% by weight is taken water and 10% weight. nitromethane, a fraction is taken which is practically pure nitromethane. Then a small intermediate fraction of a mixture of nitromethane and ethylene chlorohydrin is collected. Almost pure ethylene chlorohydrin remains in the bottom of the column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU696146A SU146734A1 (en) | 1961-02-04 | 1961-02-04 | Method for separating ethylene chlorohydrin from its azeotrope with water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU696146A SU146734A1 (en) | 1961-02-04 | 1961-02-04 | Method for separating ethylene chlorohydrin from its azeotrope with water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU146734A1 true SU146734A1 (en) | 1961-11-30 |
Family
ID=48302165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU696146A SU146734A1 (en) | 1961-02-04 | 1961-02-04 | Method for separating ethylene chlorohydrin from its azeotrope with water |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU146734A1 (en) |
-
1961
- 1961-02-04 SU SU696146A patent/SU146734A1/en active
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