(19) |
 |
|
(11) |
EP 0 143 486 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
|
16.04.1986 Bulletin 1986/16 |
(43) |
Date of publication A2: |
|
05.06.1985 Bulletin 1985/23 |
(22) |
Date of filing: 30.10.1984 |
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|
(84) |
Designated Contracting States: |
|
BE DE FR GB IT NL SE |
(30) |
Priority: |
31.10.1983 US 547016
|
(71) |
Applicant: UNION CARBIDE CORPORATION |
|
() |
|
(72) |
Inventors: |
|
- Fukuhara, Akinobu
()
- Kamm, Gerard Roland
()
|
|
|
|
(54) |
Method for on-line decoking of flame cracking reactors |
(57) This invention relates to a method for on-line decoking of flame-cracking reactors
whereby decoking is achieved without interruption of the normal operation of such
reactors and without the necessity to chance feed equipment and/or disassemble reactor
components. While maintaining the temperature of the effluent at 1000 °C to 2000 °C,
the flow of the hydrocarbon feedstock in the reactor is periodically stopped for a
time sufficient to reduce the carbon deposits to an acceptable level.