JPS5492940A - Method of cleaning the recovering device of tolylene diisocyanate - Google Patents
Method of cleaning the recovering device of tolylene diisocyanateInfo
- Publication number
- JPS5492940A JPS5492940A JP16006377A JP16006377A JPS5492940A JP S5492940 A JPS5492940 A JP S5492940A JP 16006377 A JP16006377 A JP 16006377A JP 16006377 A JP16006377 A JP 16006377A JP S5492940 A JPS5492940 A JP S5492940A
- Authority
- JP
- Japan
- Prior art keywords
- residue
- tdi
- tolylene diisocyanate
- phosgen
- diaminotoluene
- 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
Landscapes
- Detergent Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: In a recovering device of tolylene diisocyanate, residues sticking on walls of the device is removed by contacting with a hot alkali solution in water, thus effectively recovering tolylene diisocyanate from by-products formed in the reaction between diaminotoluene and phosgen using relatively simple devices equipment.
CONSTITUTION: A mixture of tar residue formed in the production of toylene diisocyanate from diaminotoluene and phosgen and tolylene diisocyanate (TDI) is continiuously fed into vacuum tube 2 heated at 250W350°C to distil TDI and separate the residue. Then the residue that is a high-viscosity liquid due to high temperature and does not stick on the heating pipe is sent with the vapor of TDI to solid separator 3 where the residue is solidified by cooling and the vapor of TDI is sent to condenser 4 where it is condensed and recovered. The residue sticking on the wall of equipment is cleaned by contacting with an alkali aqueous solution at 150W300°C under pressure.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16006377A JPS5492940A (en) | 1977-12-29 | 1977-12-29 | Method of cleaning the recovering device of tolylene diisocyanate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16006377A JPS5492940A (en) | 1977-12-29 | 1977-12-29 | Method of cleaning the recovering device of tolylene diisocyanate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5492940A true JPS5492940A (en) | 1979-07-23 |
Family
ID=15707087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16006377A Pending JPS5492940A (en) | 1977-12-29 | 1977-12-29 | Method of cleaning the recovering device of tolylene diisocyanate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5492940A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112055722A (en) * | 2018-05-04 | 2020-12-08 | 巴斯夫欧洲公司 | Method for extending the service life of a reactor comprising a distillation apparatus |
CN114045177A (en) * | 2021-10-18 | 2022-02-15 | 万华化学集团股份有限公司 | Production and utilization method of TDI stabilized tar |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS487835Y1 (en) * | 1967-06-15 | 1973-02-28 | ||
JPS4946473Y1 (en) * | 1969-09-20 | 1974-12-19 | ||
JPS4946474Y1 (en) * | 1969-10-01 | 1974-12-19 | ||
JPS50948Y1 (en) * | 1969-07-01 | 1975-01-11 | ||
JPS519592U (en) * | 1974-06-20 | 1976-01-23 | ||
JPS5190693U (en) * | 1975-01-20 | 1976-07-20 | ||
JPS51101083U (en) * | 1975-02-12 | 1976-08-13 | ||
JPS51109686U (en) * | 1975-03-03 | 1976-09-03 |
-
1977
- 1977-12-29 JP JP16006377A patent/JPS5492940A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS487835Y1 (en) * | 1967-06-15 | 1973-02-28 | ||
JPS50948Y1 (en) * | 1969-07-01 | 1975-01-11 | ||
JPS4946473Y1 (en) * | 1969-09-20 | 1974-12-19 | ||
JPS4946474Y1 (en) * | 1969-10-01 | 1974-12-19 | ||
JPS519592U (en) * | 1974-06-20 | 1976-01-23 | ||
JPS5190693U (en) * | 1975-01-20 | 1976-07-20 | ||
JPS51101083U (en) * | 1975-02-12 | 1976-08-13 | ||
JPS51109686U (en) * | 1975-03-03 | 1976-09-03 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112055722A (en) * | 2018-05-04 | 2020-12-08 | 巴斯夫欧洲公司 | Method for extending the service life of a reactor comprising a distillation apparatus |
CN114045177A (en) * | 2021-10-18 | 2022-02-15 | 万华化学集团股份有限公司 | Production and utilization method of TDI stabilized tar |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5242584A (en) | Process for producing polyolefine | |
JPS5492940A (en) | Method of cleaning the recovering device of tolylene diisocyanate | |
SU1456020A3 (en) | Method of treating producer gases obtained in gas generator | |
JP3026576B2 (en) | Vacuum distillation method | |
JPS5589385A (en) | Treatment of wastes consisting mainly of organic substances and its device | |
JPS54117309A (en) | Recovering apparatus for sensible heat of steel products | |
JPS55129257A (en) | Purification of acetonitrile containing hydrogen cyanide | |
JPS5547118A (en) | Purification of gas containing impurity | |
JPS5636574A (en) | Cleaning method of interior of furnace | |
JPS5486390A (en) | Process gas sampling apparatus | |
JPS525804A (en) | Cleaning apparatus for a charging-hole cover anframe of a coke oven | |
JPS5474297A (en) | Treatment of recovered sulfur oxide from exhaust gas | |
JPS5742528A (en) | Preparation of by-produced ammonium sulfate from coke oven gas | |
JPS53129707A (en) | High pressure producer by means of high temprature coke | |
JPS5514286A (en) | Sulfurizing metallic mold for recovery tire | |
JPS5543117A (en) | Removal of naphthalene from coke oven gas | |
JPS5520270A (en) | Production of ruthenium tetraoxide | |
SU119182A1 (en) | Method for isolating furfural | |
JPS531173A (en) | Dry process organic solvent recovery | |
JPS5467894A (en) | Discharging system of sodium heated vapor generator | |
US3113157A (en) | Process for the preparation of chlorofluoro derivatives of aliphatic hydrocarbons | |
JPS5357552A (en) | Method of removing matter attached to heat conduction tube in tube type heat recovery apparatus | |
JPS5473474A (en) | Removal of adhering matters from nuclear reactor fuel | |
JPS569217A (en) | Recovering and treating method for tar residue in ammonium sulfate mother liquor | |
JPS5210214A (en) | Process for recovery of methylmethacrylate dimer |