US4783242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation system and process
Assignee: Dow Chemical Co
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Filing: 1986-05-22
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Granted: 1988-11-08
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Expires: 2006-05-22
Abstract
Abstract A distillation system and process for removing vaporizable components from an aqueous medium including a distillation column for receiving an aqueous medium containing vaporizable components and passing steam through the column such that the steam directly contacts the aqueous medium to vaporize at least a portion of the components, a condenser in a communication with the column to condense at least a portion of the vapor in the column, a separator in communication with the condenser to separate flash vapor from liquid condensate in the separator and a thermal compressor in communication with the separator and the column to remove vapor from the separator and to inject exhaust steam from the thermal compressor into the column.
Inventors
- 👤 Lanny A. Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:05
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/32; B01D3/322; B01D1/00; B01D1/28; B01D1/284; B01D1/2856; B01D3/06; B01D3/34; B01D3/38; B01D5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
A distillation process for removing vaporizable components from an aqueous medium comprising: a. introducing an aqueous medium containing vaporizable components into a distillation column for removing a portion of the vaporizable components from the aqueous medium. b. passing through the aqueous medium a current of steam from a thermal compressor to vaporize at least a portion of the vaporizable components, c. passing at least a portion of the vapors from the distillation column through a first space of a first condenser means having a first and second space sufficient to condense at least a portion of the vapors to a condensate. d. passing a recirculation liquid to the second space of the condenser means and from the condenser to a separator to separate steam from aqueous liquid, and e. passing the steam from the separator through the thermal compressor to form steam for introducing into the distillation column.
Claim 2
Dependent Claim
148 words
A distillation process for removing vaporizable components from an aqueous medium comprising: a. introducing an aqueous medium containing vaporizable components into a distillation column for removing a portion of the vaporizable components from the aqueous medium. b. passing through the aqueous medium a current of steam from a thermal compressor to vaporize at least a portion of the vaporizable components, c. passing at least a portion of the vapors from the distillation column through a first space of a first condenser means having a first and second space sufficient to condense at least a portion of the vapors to a condensate. d. passing a recirculation liquid to the second space of the condenser means and from the condenser to a separator to separate steam from aqueous liquid, and e. passing the steam from the separator through the thermal compressor to form steam for introducing into the distillation column.
Claim 3
Dependent Claim
26 words
The process of claim 1 including passing the vapors from the first condenser means through a second condenser means to condense substantially all of the vapors.
Claim 4
Dependent Claim
24 words
The process of claim 2 including recycling at least a portion of the condensed vapors from the second condenser means to the distillation column.
Claim 5
Dependent Claim
25 words
The process of claim 2 including passing the condensed vapors from the second condenser means to a decanting means to separate at least two liquids.
Claim 6
Dependent Claim
24 words
The process of claim 4 including recycling at least a portion of at least one liquid from the decanting means to the distillation column.
Claim 7
Dependent Claim
24 words
The process of claim 1 including preheating the aqueous medium in a preheater means prior to introducing the aqueous medium to the distillation column.
Claim 8
Dependent Claim
24 words
The process of claim 6 including passing at least a portion of the recirculation fluid to the preheater means for preheating the aqueous medium.
Claim 9
Dependent Claim
17 words
The process of claim 1 including passing a bottom stream from the distillation column to the separator.
Claim 10
Dependent Claim
24 words
The process of claim 1 including recycling at least a portion of the aqueous condensate from the first condenser means to the distillation column.
Claim 11
Dependent Claim
16 words
The process of claim 1 including adding an aqueous make-up stream to the recirculation fluid stream.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |