Acrylonitrile recovery process
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United States of America Patent
Stats
-
Apr 25, 2000
Grant Date -
N/A
app pub date -
Apr 6, 1999
filing date -
Apr 6, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The process of the present invention comprises transporting a reactor effluent containing acrylonitrile/methacrylonitrile to a first column (quench) where the reactor effluent is cooled with a first aqueous stream, transporting the cooled effluent into an indirect contact cooler to condensed at least some of the cooled effluent to form a condensate comprising water and acrylonitrile/methacrylonitrile, transporting the remaining cooled gaseous effluent containing acrylonitrile/methacrylonitrile into a second column (absorber) where the cooled effluent is contacted with a second aqueous stream to absorb substantially all of the remaining acrylonitrile/methacrylonitrile into the second aqueous stream, transporting the second aqueous stream containing the acrylonitrile/methacrylonitrile to a first distillation column (recovery column) for separation of the crude acrylonitrile/methacrylonitrile from the second aqueous stream, and transporting the separated crude acrylonitrile/methacrylonitrile to a second distillation column (heads column) to remove at least some impurities from the crude acrylonitrile/methacrylonitrile, and transporting the partially purified acrylonitrile/methacrylonitrile to a third distillation column (product column) to further purify the acrylonitrile/methacrylonitrile, and recovering the purified acrylonitrile/methacrylonitrile, wherein the improvement comprises transporting the condensate formed in the indirect contact cooler to a decanter where the condensate is separated into an organic phase comprising acrylonitrile/methacrylonitrile, an aqueous phase and a vapor phase, and the organic phase is introduced into the recovery column without passing through the absorber column.

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- 15 United States
- 10 France
- 8 Japan
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- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
STAMDARD OIL CO THE | MAIL CODE 1907A 200 EAST RANDOLP DR CHICAGO IL 60601 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Godbole, Sanjay Purushottam | Solon, OH | 7 | 42 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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