US3592015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectification column with two component closed heat exchange cycle
Assignee: Messer Griesheim GmbH
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Filing: 1968-12-19
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Granted: 1971-07-13
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Expires: 1988-12-19
Abstract
Abstract A rectification process for separating mixtures of individual components whose boiling temperatures or vapor pressure curves are far apart wherein for the intensification of the rectification, the column adsorption layer is heated with a circulating gas and the column head is cooled with a circulating gas; is characterized by having as the circulating gas a multicomponent mixture consisting of at least two individual components, by means of which, after it is compressed, the column adsorption layer is heated, whereby the mixture is partially condensed, whereupon it is separated in a separator into a liquid phase with preponderantly difficulty boiling components and into a vapor phase with preponderantly easily boiling components, whereupon the vapor phase through heat exchange is condensed with expanded and vaporizing liquid phase and cools the column head after expansion, and that finally after expansion to the suction pressure and mixing, the original multicomponents mixture is again prepared and conducted to the compressor.
Inventors
- 👤 Martin Streich
- 👤 Heiner Tanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:39
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; B; B01; B01D; B01D3/00; B01D3/007; B01D3/14; C; C07; C07C; C07C7/00; C07C7/04; F25J3/0204; F25J3/0219; F25J3/0233; F25J2200/00; F25J2200/02; F25J2200/40; F25J2200/72; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62; F25J2270/00; F25J2270/12; F25J2270/18; F25J2270/66
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
146 words
In a rectification process for separating mixtures of individual components whose boiling temperatures or vapor pressure curves are far apart wherein for the increasing of the rectification, the column bottom is heated with a circulating refrigerant and the column head is cooled with a circulating refrigerant, the improvement comprising utilizing a multicomponent mixture as the circulating refrigerant, the multicomponent mixture consisting of at least two individual components, compressing and then heating the column bottom, partially condensing the refrigerant mixture and separating it in a separator into a liquid phase having predominantly high boiling components and a vapor phase having predominantly low boiling components, condensing the vapor phase by heat exchange with expanded and vaporizing liquid phase, the condensed vapor phase cooling the column head after expansion to the suction pressure of the compressor, mixing the separated refrigerant components, and conducting the component mixture to the compressor.
Claim 2
Dependent Claim
146 words
In a rectification process for separating mixtures of individual components whose boiling temperatures or vapor pressure curves are far apart wherein for the increasing of the rectification, the column bottom is heated with a circulating refrigerant and the column head is cooled with a circulating refrigerant, the improvement comprising utilizing a multicomponent mixture as the circulating refrigerant, the multicomponent mixture consisting of at least two individual components, compressing and then heating the column bottom, partially condensing the refrigerant mixture and separating it in a separator into a liquid phase having predominantly high boiling components and a vapor phase having predominantly low boiling components, condensing the vapor phase by heat exchange with expanded and vaporizing liquid phase, the condensed vapor phase cooling the column head after expansion to the suction pressure of the compressor, mixing the separated refrigerant components, and conducting the component mixture to the compressor.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein the bottom heating and head cooling are achieved by utilizing at least two cascading gas cycles, and at least one of the cascading cycles being a multicomponent mixture cycle with mixture separation being by partial condensation.
Claim 4
Dependent Claim
88 words
The process of claim 1, wherein after the first separation step the phase in vapor form is only partially condensed by heat exchange with the expanded and vaporizing liquid phase, whereupon the partially condensed phase is separated into a vapor and a liquid phase in a second separator corresponding to the process in the first step, and proceeding so far as in the first step until finally after a last step a last liquid phase occurs on the coldest temperature level at which the column head is cooled.
Claim 5
Dependent Claim
92 words
The process of claim 2 wherein after the first separation step the vapor phase is only partially condensed by heat exchange with the expanded and vaporizing liquid phase, whereupon the partially condensed phase is separated into a vapor and a liquid phase in a second separator corresponding to the process in the first step, and proceeding so far as in the first step until finally after a last step a last liquid phase occurs at the coldest temperature level with which the condensed cycle gas of an after-switched cascade cycle is condensed.
Claim 6
Dependent Claim
88 words
The process of claim 2, wherein after the first separation step the phase in vapor form is only partially condensed by heat exchange with the expanded and vaporizing liquid phase, whereupon the partially condensed phase is separated into a vapor and a liquid phase in a second separator corresponding to the process in the first step, and proceeding so far as in the first step until finally after a last step a last liquid phase occurs on the coldest temperature level at which the column head is cooled.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein the cold output at the column takes place in several steps at various temperature levels.
Claim 8
Dependent Claim
19 words
The process of claim 6 wherein the multicomponent mixtures are composed of components of the mixture to be decomposed.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the multicomponent mixture cycles are closed cycles.
Claim 10
Dependent Claim
47 words
The process of claim 7 wherein at least one of the multicomponent mixture cycles is an open cycle wherein a fraction of the last and the intermediate fractions is passed directly into the column and the thus used-up cycle component is replaced by a corresponding decomposition product.
Claim 11
Dependent Claim
17 words
The process of claim 7, wherein the mixture to be decomposed consists essentially of methane and ethylene.
Claim 12
Dependent Claim
38 words
The process of claim 10 wherein a portion of the liquid ethylene-rich fraction is separated in a separator after expansion in a choke valve and contributes to the partial condensation of the crude gas in a heat exchanger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |