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US 8,802,909 B2Granted
Method for improving productivity and process stability in styrene manufacturing system having multiple reactors connected in series
AssigneeSamsung Total Petrochemicals Co., Ltd.
InventorsJong-Kuk Won, Hee-Heon Jang
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Abstract
A method for improving productivity and process stability in styrene monomer manufacturing system using a reaction system having multiple reactors connected in series, which can prevent destruction of the embedded catalyst and bending of a screen which supports catalyst and achieve homogeneous catalyst inactivation during the reaction by divergence of some portions of the feed containing steam and ethylbenzene and injection thereof into a certain point of the system.
Claims4
A method for improving productivity and process stability in a styrene preparation process system comprising:
- Providing first (R-1), second (R-2), and third (R-3) adiabatic reactors connected in series, the first adiabatic reactor (R-1) having a first heat exchanger (HX-1) located downstream and a first furnace (F-1) located upstream, the second adiabatic reactor (R-2) having a second heat exchanger (HX-2) located downstream and a second furnace (F-2) located upstream, and the third adiabatic reactor (R-3) having a third heat exchanger (HX-3) located downstream and a third furnace (F-3) located upstream;
- diverging a portion of a raw material containing steam and ethylbenzene downstream from the third heat exchanger (HX-3) to produce a diverged raw material;
- diverging a portion of a steam having a temperature in the range of 800-900° C. discharged from the first furnace (F-1) to produce a diverged steam;
- mixing the diverged raw material and the diverged steam to produce a first mixture;
- and
- injecting the first mixture at a point (P) downstream from the second adiabatic reactor (R-2) and upstream from the second heat exchanger (HX-2) or injecting the first mixture at a point (Q) downstream from the second heat exchanger (HX-2) and upstream from the third adiabatic reactor (R-3).
3 more elements
Dependencies are inferred from the claim text.