Method and system for bisphenol a production using water
First Claim
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1. A system for preparing a relatively high-purity bisphenol A product from an adduct solid while inhibiting decomposition of bisphenol A, the adduct solid comprising at least about 25 weight percent phenol, the system comprising:
- a) a first solidification system producing a bisphenol A adduct solid from a first mixture of bisphenol A and phenol during use, the adduct solid comprising at least about 25 weight percent phenol, and the first solidification system operating at a temperature below 150°
C.;
b) a first recovery system separating at least a portion of the adduct solid from the first mixture during use, the first recovery system operating at a temperature below 150°
C.;
c) a mixing system heating water to a temperature less than about 150°
C. during use, and mixing the adduct solid with the heated water during use to form a first solution comprising bisphenol A, water, and phenol;
d) a separation column adapted to reduce the concentration of phenol in the first solution and produce a second solution comprising bisphenol A and less than about 1 weight percent phenol during use, the column comprising an overhead outlet near the top of the column, a bottoms outlet near the bottom of the column, and a feed inlet between the overhead outlet and the bottoms outlet, and the column operating at a temperature below about 150°
C. during use;
e) a second solidification system adapted to produce a bisphenol A product from the second solution during use, the second solidification system operating at a temperature below about 150°
C. during use; and
f) a second recovery system adapted to separate at least a portion of the bisphenol A product from the second solution during use, the separated portion comprising at least about 99 weight percent bisphenol A, the second recovery system operating at a temperature below about 150°
C. during use.
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Abstract
Methods/systems for making a relatively high-purity bisphenol A product from phenol and acetone. Controlled turbulence is used to form bisphenol A adduct solids having improved physical properties. Phenol is separated from the bisphenol A product while inhibiting decomposition of bisphenol A.
85 Citations
34 Claims
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1. A system for preparing a relatively high-purity bisphenol A product from an adduct solid while inhibiting decomposition of bisphenol A, the adduct solid comprising at least about 25 weight percent phenol, the system comprising:
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a) a first solidification system producing a bisphenol A adduct solid from a first mixture of bisphenol A and phenol during use, the adduct solid comprising at least about 25 weight percent phenol, and the first solidification system operating at a temperature below 150°
C.;b) a first recovery system separating at least a portion of the adduct solid from the first mixture during use, the first recovery system operating at a temperature below 150°
C.;c) a mixing system heating water to a temperature less than about 150°
C. during use, and mixing the adduct solid with the heated water during use to form a first solution comprising bisphenol A, water, and phenol;d) a separation column adapted to reduce the concentration of phenol in the first solution and produce a second solution comprising bisphenol A and less than about 1 weight percent phenol during use, the column comprising an overhead outlet near the top of the column, a bottoms outlet near the bottom of the column, and a feed inlet between the overhead outlet and the bottoms outlet, and the column operating at a temperature below about 150°
C. during use;e) a second solidification system adapted to produce a bisphenol A product from the second solution during use, the second solidification system operating at a temperature below about 150°
C. during use; andf) a second recovery system adapted to separate at least a portion of the bisphenol A product from the second solution during use, the separated portion comprising at least about 99 weight percent bisphenol A, the second recovery system operating at a temperature below about 150°
C. during use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33)
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30. A system for separating phenol from a bisphenol A adduct solid while inhibiting decomposition of bisphenol A, the adduct solid comprising at least about 25 weight percent phenol, the system comprising:
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a) a mixing system adapted to heat water to a temperature less than about 150°
C. and mix the adduct solid with the heated water to form a first solution comprising bisphenol A, water, and phenol;b) a conduit connected to allow the first solution to flow to a separation column, the separation column being adapted to receive the first solution from the mixer and adapted to reduce the concentration of phenol in the first solution to produce a second solution comprising bisphenol A and less than about 1 weight percent phenol, the column comprising an overhead outlet near the top of the column, a bottoms outlet near the bottom of the column, and a feed inlet between the overhead outlet and the bottoms outlet.
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34. A system for preparing a relatively high-purity bisphenol A product from an adduct solid while inhibiting decomposition of bisphenol A, the adduct solid comprising at least about 25 weight percent phenol, the system comprising:
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a) a first solidification system producing a bisphenol A adduct solid from a first mixture of bisphenol A and phenol during use, the adduct solid comprising at least about 25 weight percent phenol, and the first solidification system operating at a temperature below 150°
C.;b) a first recovery system separating at least a portion of the adduct solid from the first mixture during use, the first recovery system operating at a temperature below 150°
C.;c) a mixing system adapted to melt the adduct solid and add water at a temperature less than about 150°
C. to the melted adduct solid during use to form a first solution comprising bisphenol A, water, and phenol;d) a separation column adapted to reduce the concentration of phenol in the adduct solution and produce a second solution comprising bisphenol A and less than about 1 weight percent phenol during use, the column comprising an overhead outlet near the top of the column, a bottoms outlet near the bottom of the column, and a feed inlet between the overhead outlet and the bottoms outlet, and the column operating at a temperature below about 150°
C. during use;e) a second solidification system adapted to produce a bisphenol A product from the second solution during use, the second solidification system operating at a temperature below about 150°
C. during use; andf) a second recovery system adapted to separate at least a portion of the bisphenol A product from the second solution during use, the separated portion comprising at least about 99 weight percent bisphenol A, the second recovery system operating at a temperature below about 150°
C. during use.
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Specification