US3911082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of resin formation during absorption of CO{HD 2 {B and/or H{HD 2{B S from cracking gases
Assignee: Linde GmbH
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Filing: 1972-11-24
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Granted: 1975-10-07
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Expires: 1992-11-24
Abstract
Abstract In a process comprising scrubbing in a column cracking gas containing CO2, H2S and resin precursors with aqueous alkaline scrubbing solution to absorb CO2 and H2S and thermally regenerating resultant loaded aqueous solution, the improvement comprising separating resin precursors from the aqueous solution prior to or during the regeneration of said solution. Settling, stripping, and solvent extraction techniques are employed.
Inventors
- 👤 Friedrich Rottmayr
- 👤 Hans Reimann
- 👤 Robert Schuster
- 👤 Walter Wagner
- 👤 Hans Joachim Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:14
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1456; B01D53/1462; C; C07; C07C; C07C7/00; C07C7/11; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
IN A PROCESS COMPRISING I) SCRIBING A CRACKING GAS CONTAINING A) RESIN PRESURSORS SELECTED FROM THE GROUP CONSISTING OF DIENIES, HIGHER ACETYLENES, UNSATURATED POLYCYCLIC OR HETEROCYLIC COMPOUNDS, AND POLYMERIZABBLE OF CONDENSIBLE SULPHURCONTAINING COMPOUNDS, AND B) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE WITH C) A THERMALLY REGENERABLE AQUEOUS ALKALINE SCRUBBING SOLUTION TO ABSORB PRIMARILY SAID CARBON DIOXIDE AND HYDROGEN SULFIDE, AND II) THERMICALLY REGENERATING THE RESULTANT LOADED AQUEOUS SOLUTION, THE IMPROVEMENT WHICH COMPRISES: PASSING A LIQUID DISPERSION OF A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT AND AN AQUOUS SOLUTION OF POTASSIUM CARBONATE, ALKANLOAMINE OR AN AMINOCARBOXYLIC, AMINOSULFONIC OR AMINOCARBONIC ACID SALT THROUGH SCRUBBING AND REGENERATING COLUMS TO SEPARATE AND REMOVE THE RESIN PRESURORS FROM THE LOADED AQUEOUS SOLUTION DURING THERMAL REGENERATION OF SAID LOADED AQUEOIS SOLUTION BY PREFERENTIAL EXTRACTION OF SAID RESIN PRECURSORS INTO SAID ORGANIC SOLVENT.
Claim 2
Dependent Claim
143 words
IN A PROCESS COMPRISING I) SCRIBING A CRACKING GAS CONTAINING A) RESIN PRESURSORS SELECTED FROM THE GROUP CONSISTING OF DIENIES, HIGHER ACETYLENES, UNSATURATED POLYCYCLIC OR HETEROCYLIC COMPOUNDS, AND POLYMERIZABBLE OF CONDENSIBLE SULPHURCONTAINING COMPOUNDS, AND B) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE WITH C) A THERMALLY REGENERABLE AQUEOUS ALKALINE SCRUBBING SOLUTION TO ABSORB PRIMARILY SAID CARBON DIOXIDE AND HYDROGEN SULFIDE, AND II) THERMICALLY REGENERATING THE RESULTANT LOADED AQUEOUS SOLUTION, THE IMPROVEMENT WHICH COMPRISES: PASSING A LIQUID DISPERSION OF A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT AND AN AQUOUS SOLUTION OF POTASSIUM CARBONATE, ALKANLOAMINE OR AN AMINOCARBOXYLIC, AMINOSULFONIC OR AMINOCARBONIC ACID SALT THROUGH SCRUBBING AND REGENERATING COLUMS TO SEPARATE AND REMOVE THE RESIN PRESURORS FROM THE LOADED AQUEOUS SOLUTION DURING THERMAL REGENERATION OF SAID LOADED AQUEOIS SOLUTION BY PREFERENTIAL EXTRACTION OF SAID RESIN PRECURSORS INTO SAID ORGANIC SOLVENT.
Claim 3
Dependent Claim
26 words
A process according to claim 1, wherein said cracking gas contains a total of less than 1% by volume of combined carbon dioxide and hydrogen sulfide.
Claim 4
Dependent Claim
29 words
A process according to claim 1, wherein the volume ratio of aqueous to non-aqueous phases during said solvent extraction is from about 50 : 1 to 10 : 1.
Claim 5
Dependent Claim
45 words
A process according to claim 1, wherein the mixture of said aqueous solution and said organic solvent is maintained in the dispersed state by introducing a partial stream of raw cracking gas into the sump liquid of said absorption column beneath the liquid level thereof.
Claim 6
Dependent Claim
34 words
A process according to claim 1, wherein the mixture of said aqueous solution and said organic solvent is maintained in the dispersed state by blowing steam into the sump liquid of said regenerating column.
Claim 7
Dependent Claim
19 words
A process according to claim 1, further comprising separating the loaded organic solvent and aqueous solution by phase separation.
Claim 8
Dependent Claim
19 words
A process according to claim 6, wherein said phase separation is conducted in the sump of said regenerating column.
Claim 9
Dependent Claim
66 words
A process according to claim 1, wherein the cracking gas contains a total of less than 1% by volume of combined carbon dioxide and hydrogen sulfide, and wherein the volume ratio of aqueous to non-aqueous phases during the solvent extraction is from about 50:1 to 10:1, further comprising separating the loaded organic solvent and aqueous solution by phase separation in the sump of said regenerating column.
Claim 10
Dependent Claim
20 words
A process according to claim 1, wherein the aqueous solution is one of an aminocarboxylic, aminosulfonic or aminocarbonic acid salt.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |