JPS57129822A - Recovering and purifying method for hydrocyanic acid - Google Patents
Recovering and purifying method for hydrocyanic acidInfo
- Publication number
- JPS57129822A JPS57129822A JP1495981A JP1495981A JPS57129822A JP S57129822 A JPS57129822 A JP S57129822A JP 1495981 A JP1495981 A JP 1495981A JP 1495981 A JP1495981 A JP 1495981A JP S57129822 A JPS57129822 A JP S57129822A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- hydrocyanic acid
- vapor
- soln
- absorbed
- 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.)
- Granted
Links
Abstract
PURPOSE: To effectively recover hydrocyanic acid by introducing uncondensed gas from a hydrocyanic acid purifying tower and crude hydrocyanic acid vapor from an acetonitrile concentrating tower into an absorption tower and by allowing them to be absorbed in a soln. drawn from the bottom of the purifying tower.
CONSTITUTION: In the manufacture of (meth)acrylonitrile by the ammoxidation of olefin, purified hydrocyanic acid vapor 2 obtd. from the top of a hydrocyanic acid removing tower 1 is introduced into a hydrocyanic acid puriying tower 3. Uncondensed gas from the top of the tower 3 is liquefied with a dephlegmation unit 4, and the residual uncondensed gas 6 is introduced into a lower part of an absorption tower 7. On the other hand, purified hydrocyanic acid vapor 10 from the top of an acetonitrile concentrating tower 8 is introduced into the lower part of the tower 7 through a dephlegmation unit 9. The gas 6 and the vapor 10 are allowed to be absorbed in a soln. 11 drawn from the bottom of the tower 3, and the resulting absorbed soln. 12 is fed to the tower 3 at a position under an inlet for introducing the vapor 2 and above a position for drawing a recovered soln. 15 contg. acrylonitrile, etc. from the tower 3.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1495981A JPS57129822A (en) | 1981-02-05 | 1981-02-05 | Recovering and purifying method for hydrocyanic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1495981A JPS57129822A (en) | 1981-02-05 | 1981-02-05 | Recovering and purifying method for hydrocyanic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57129822A true JPS57129822A (en) | 1982-08-12 |
JPH0220565B2 JPH0220565B2 (en) | 1990-05-09 |
Family
ID=11875508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1495981A Granted JPS57129822A (en) | 1981-02-05 | 1981-02-05 | Recovering and purifying method for hydrocyanic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57129822A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11199559A (en) * | 1997-11-25 | 1999-07-27 | Standard Oil Co:The | Minimization of waste material and product recovering process |
CN1073533C (en) * | 1995-08-10 | 2001-10-24 | 淄博石油化工厂 | Process for recovering by-product gaseous hydrocyanic acid from acrylonitrile production |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5959134A (en) * | 1998-05-20 | 1999-09-28 | The Standard Oil Company | Recovery of organics from process flare header |
CN102502707B (en) * | 2011-10-26 | 2014-04-23 | 重庆紫光化工股份有限公司 | Method for purifying hydrocyanic acid from mixed gas containing hydrocyanic acid |
-
1981
- 1981-02-05 JP JP1495981A patent/JPS57129822A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1073533C (en) * | 1995-08-10 | 2001-10-24 | 淄博石油化工厂 | Process for recovering by-product gaseous hydrocyanic acid from acrylonitrile production |
JPH11199559A (en) * | 1997-11-25 | 1999-07-27 | Standard Oil Co:The | Minimization of waste material and product recovering process |
JP4542635B2 (en) * | 1997-11-25 | 2010-09-15 | イネオス ユーエスエー エルエルシー | Waste minimization and product recovery process |
Also Published As
Publication number | Publication date |
---|---|
JPH0220565B2 (en) | 1990-05-09 |
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