Processes for the preparation of an olefinic product
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United States of America Patent
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Nov 28, 2017
Issued Date -
N/A
app pub date -
Oct 29, 2013
filing date -
Oct 31, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a process for preparing an olefin, comprising:
- (a) reacting an oxygenate, in a reaction zone in the presence of a molecular sieve catalyst, at a temperature from 350 to 1000° C., to produce a effluent stream, comprising at least oxygenate, olefin, water and acidic by-products;(b) cooling the reaction effluent stream by an indirect heat exchange to a temperature greater than the dew point temperature of effluent stream;(c) further rapidly cooling the effluent stream to a temperature lower than the dew point temperature of the effluent stream by direct injection of an aqueous liquid into the effluent stream, to form a quench effluent stream; and(d) passing the quench effluent stream into a quench tower and contacting the quench effluent stream with a second aqueous liquid in the presence of at least one set of internals, to produce a quench tower gaseous stream comprising the olefin.
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Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 28, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 28, 2029 |
