US5118328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for regenerating adsorbers
Assignee: Hydac Process Technology GmbH
•
Filing: 1991-02-08
•
Granted: 1992-06-02
•
Expires: 2011-02-08
Abstract
Abstract The present invention relates to a process for regenerating adsorbers as used in solvent recovery, for example. Regeneration is effected in that the adsorbed substances are desorbed according to known processes and a gaseous desorbate stream is produced, that the gaseous desorbate stream is fed into one or several pervaporation modules, that the desorbed substances in the pervaporation modules are removed from the desorbate stream by gas permeation via semi-permeable solubility diffusion membranes, and that the reduced desorbate stream is recirculated to the adsorber. Preferred embodiments of the process according to this invention use heatable solubility diffusion membranes. A recovery of the desorbate stream is rendered possible by the process according to this invention, which does not imply a change in state of the entire desorbate stream.
Inventors
- 👤 Ralf Wnuk
- 👤 Horst Chmiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:26
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/34; B01J20/345; B01J20/3458; B01J20/3466; B01J20/3483; B01J20/3491
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
62 words
A process for regeneration of an adsorber, comprising the steps of desorbing adsorbed solvent substances and producing a gaseous desorbate stream, feeding the gaseous desorbate stream into at least one pervaporation module, removing the desorbed solvent substances from the desorbate stream by gas permeation of the solvent substance through a semi-permeable solubility diffusion membrane, and recirculating the desorbate stream to the adsorber.
Claim 2
Dependent Claim
62 words
A process for regeneration of an adsorber, comprising the steps of desorbing adsorbed solvent substances and producing a gaseous desorbate stream, feeding the gaseous desorbate stream into at least one pervaporation module, removing the desorbed solvent substances from the desorbate stream by gas permeation of the solvent substance through a semi-permeable solubility diffusion membrane, and recirculating the desorbate stream to the adsorber.
Claim 3
Dependent Claim
23 words
The process according to claim 1, wherein the gaseous desorbate stream is produced by a temperature increase using a hot inert gas stream.
Claim 4
Dependent Claim
28 words
The process according claim 1 wherein the gaseous desorbate stream is produced by a pressure decrease in the adsorber and by purging the adsorber with an inert gas.
Claim 5
Dependent Claim
15 words
The process according to claim 3, wherein the inert purge gas used is water vapor.
Claim 6
Dependent Claim
52 words
The process according to claim 4, wherein water vapor-containing permeate is supplied into a condenser and allowed to condense, the condensate is fed into a settler and separated into an aqueous phase and a phase immiscible with water, and wherein the aqueous phase is drawn off, evaporated and supplied to the desorbate.
Claim 7
Dependent Claim
53 words
The process according to claim 4 wherein water vapor-containing permeate is compacted via a vacuum pump and allowed to condense, the condensate is fed into a settler and separated into an aqueous phase and a phase immiscible with water, and wherein the aqueous phase is drawn off, evaporated and supplied to the desorbate.
Claim 8
Dependent Claim
22 words
The process according to claim 1, wherein the gaseous desorbate stream is produced by desorbing the adsorbed substances by means of desorbant.
Claim 9
Dependent Claim
35 words
The process according to claim 1, wherein a partial pressure decrease for the desorbed substances is produced in the pervaporation module by applying a reduced pressure on a permeate side of the solubility diffusion membrane.
Claim 10
Dependent Claim
40 words
The process according to claim 1, wherein a partial pressure reduction for the desorbed substances is produced in the pervaporation module by feeding a carrier gas stream in proximity to a rear wide of the membrane to remove the permeate.
Claim 11
Dependent Claim
23 words
The process according to claim 1, wherein the temperature of the solubility diffusion membrane is maintained above the temperature of the desorbate stream.
Claim 12
Dependent Claim
13 words
The process according to claim 10, wherein the membrane is a heatable membrane.
Claim 13
Dependent Claim
73 words
The process according to claim 1, wherein desorption is effected by a temperature increase and by purging the adsorber with an inert gas, purge-gas containing permeate is condensed, desorbed substances are separated and reduced, condensed purge gas is obtained, reduced, condensed purge gas is heated or evaporated in an evaporator, and energy required for heating or evaporating the purge gas is obtained by inner thermal coupling from cooling the adsorber to operating temperature.
References Cited (Backward Citations)
US4104039A
Cited
US4229188A
Cited
US4238204A
Cited
DE2936873A1
Cited
US4336159A
Cited
US4414003A
Cited
US4755299A
Cited
US4444571A
Cited
US4553983A
Cited
DE3518871A1
Cited
FR2580947A1
Cited
US4738694A
Cited
US4645516A
Cited
US4765804A
Cited
US4859216A
Cited
US4895989A
Cited
DE3726431A1
Cited
US4783203A
Cited
US4994094A
Cited
US5015365A
Cited
US4906256A
Cited
US5004482A
Cited
US4929357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-02 | 1995-12-02 | 1996-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-02 | 1999-12-02 | 2000-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-02 | 2003-12-02 | 2004-06-02 | $7700.00 | Window Closed / Lapsed |