JPS5492940A - Method of cleaning the recovering device of tolylene diisocyanate - Google Patents

Method of cleaning the recovering device of tolylene diisocyanate

Info

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
Application number
JP16006377A
Other languages
Japanese (ja)
Inventor
Shigeki Mori
Kiyoshi Nakamura
Yasuo Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP16006377A priority Critical patent/JPS5492940A/en
Publication of JPS5492940A publication Critical patent/JPS5492940A/en
Pending legal-status Critical Current

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
JP16006377A 1977-12-29 1977-12-29 Method of cleaning the recovering device of tolylene diisocyanate Pending JPS5492940A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS487835Y1 (en) * 1967-06-15 1973-02-28
JPS4946474Y1 (en) * 1969-10-01 1974-12-19
JPS4946473Y1 (en) * 1969-09-20 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

Patent Citations (8)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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