JPS57165359A - Preparation of unsaturated nitrile - Google Patents
Preparation of unsaturated nitrileInfo
- Publication number
- JPS57165359A JPS57165359A JP56050080A JP5008081A JPS57165359A JP S57165359 A JPS57165359 A JP S57165359A JP 56050080 A JP56050080 A JP 56050080A JP 5008081 A JP5008081 A JP 5008081A JP S57165359 A JPS57165359 A JP S57165359A
- Authority
- JP
- Japan
- Prior art keywords
- column
- distillation
- recovering
- heater
- product
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To prepare the titled compound in high efficiency, utilizing the heat effectively, by recovering crude product of the ammoxidation reaction of an olefin using a recovering column, and distilling the crude product with various distillation columns each having a heater at a specific position using the vapor gnerated in the recovering column as the heat source for distillation.
CONSTITUTION: The ammoxidation reaction of an olefin is carried out in the reactor 1, and the produced reaction mixture containing unsaturated nitrile, saturated nitrile, and cyanic acid is absorbed in water in an absorption column 8, subjected to the extraction distillation in the recovering column 13, and distilled and purified by the cyanic acid removing column 21, the dehydration column 25 and the product distillation columns 28, etc. The distillation columns are operated in the following manner: the column is furnished with a heater 29 at the position where the temperature in the column becomes lower than the vapor temperature at the top of the recovering column; the distillation is carried out using the vapor from the recovering column as the distillation heat source; the liquid in the distillation column below the heater 29 is supplied to the re-distillation column 31 and distilled with the heater 32; the distillate obtained from the top of the column is circulated to the bottom of the product distillation column 28; the product (e.g. acrylonitrile) is condensed with the condenser 30; and the high-boiling component is extracted from the bottom of the re-distillation column 31.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56050080A JPS57165359A (en) | 1981-04-03 | 1981-04-03 | Preparation of unsaturated nitrile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56050080A JPS57165359A (en) | 1981-04-03 | 1981-04-03 | Preparation of unsaturated nitrile |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57165359A true JPS57165359A (en) | 1982-10-12 |
Family
ID=12849027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56050080A Pending JPS57165359A (en) | 1981-04-03 | 1981-04-03 | Preparation of unsaturated nitrile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57165359A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58162565A (en) * | 1982-03-19 | 1983-09-27 | Asahi Chem Ind Co Ltd | Preparation of unsaturated nitrile |
JP2010222308A (en) * | 2009-03-24 | 2010-10-07 | Asahi Kasei Chemicals Corp | Method for purifying acrylonitrile |
CN108299235A (en) * | 2017-10-30 | 2018-07-20 | 赵君 | A kind of continuous cyaniding device and its technique |
-
1981
- 1981-04-03 JP JP56050080A patent/JPS57165359A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58162565A (en) * | 1982-03-19 | 1983-09-27 | Asahi Chem Ind Co Ltd | Preparation of unsaturated nitrile |
JPS6158463B2 (en) * | 1982-03-19 | 1986-12-11 | Asahi Chemical Ind | |
JP2010222308A (en) * | 2009-03-24 | 2010-10-07 | Asahi Kasei Chemicals Corp | Method for purifying acrylonitrile |
CN108299235A (en) * | 2017-10-30 | 2018-07-20 | 赵君 | A kind of continuous cyaniding device and its technique |
CN108299235B (en) * | 2017-10-30 | 2023-12-05 | 烟台国邦化工机械科技有限公司 | Continuous cyanidation device and process thereof |
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