Patent US3894093A successfully refreshed from Google Patents.
US3894093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of addition products of ethylene oxide and compounds containing mobile hydrogen
Assignee: Hoechst AG
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Filing: 1973-08-01
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Granted: 1975-07-08
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Expires: 1993-08-01
Abstract
Abstract Polyethylene glycol ethers are obtained in great purity and high yields when liquid ethylene oxide is fed into a turbulent stream of the catalyst-containing starting material and the reaction mixture is passed through a mixing device and, subsequently, through a heat exchanger. As the mixing device, e.g., a Venturi type mixer can be employed.
Inventors
- 👤 Friedrich Raizner
- 👤 Ulfert Onken
- 👤 Horst Schrader
- 👤 Werner Wellbrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:39
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2696
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
163 words
IN THE PROCESS FOR THE MANUFACTURE OF ADDITION PRODUCTS OF ETHYLENE OXIDE COMPOUNDS CONTAINING MOBILE HYDROGEN, IN WHICH PROCESS THE MATERIAL TO BE REACTED WITH THE ETHYLENE OXIDE IS RECYCLED IN THE COURSE OF THE REACTION AND IN WHICH THE REACTION HEAT IS ABSTRACTED BY MEANS OF A TUBULAR HEAT EXCHANGER INSTALLED IN THE CYCLIC SYSTEM, THROUGH THE TUBES OF WHICH HEAT EXCHANGER THE MATERIAL TO BE REACTED FLOWS IN A CONTINUOUS STREAM, THE IMPROVEMENT WHICH COMPRISES FEEDING THE ETHYLENE OXIDE IN AN ATOMIZED LIQUID STATE INTO A TURBULENT LIQUID STREAM OF THE MATERIAL TO BE REACTED AND IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF FLOW OF SAID LIQUID STREAM, PASSING THE REACTION MIXTURE SO OBTAINED THROUGH A MIXING CHAMBER AT A TEMPERATURE AND PRESSURE TO CAUSE A PORTION OF THE ETHYLENE OXIDE TO VAPORIZE IN SAID CHAMBER, AND IMMEDIATELY THEREAFTER PASSING THE REACTION MIXTURE CONTAINING VAPOR BUBBLES THROUGH THE TUBES OF SAID HEAT EXCHANGER TO REMOVE HEAT OF REACTION THEREFROM.
Claim 2
Dependent Claim
163 words
IN THE PROCESS FOR THE MANUFACTURE OF ADDITION PRODUCTS OF ETHYLENE OXIDE COMPOUNDS CONTAINING MOBILE HYDROGEN, IN WHICH PROCESS THE MATERIAL TO BE REACTED WITH THE ETHYLENE OXIDE IS RECYCLED IN THE COURSE OF THE REACTION AND IN WHICH THE REACTION HEAT IS ABSTRACTED BY MEANS OF A TUBULAR HEAT EXCHANGER INSTALLED IN THE CYCLIC SYSTEM, THROUGH THE TUBES OF WHICH HEAT EXCHANGER THE MATERIAL TO BE REACTED FLOWS IN A CONTINUOUS STREAM, THE IMPROVEMENT WHICH COMPRISES FEEDING THE ETHYLENE OXIDE IN AN ATOMIZED LIQUID STATE INTO A TURBULENT LIQUID STREAM OF THE MATERIAL TO BE REACTED AND IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF FLOW OF SAID LIQUID STREAM, PASSING THE REACTION MIXTURE SO OBTAINED THROUGH A MIXING CHAMBER AT A TEMPERATURE AND PRESSURE TO CAUSE A PORTION OF THE ETHYLENE OXIDE TO VAPORIZE IN SAID CHAMBER, AND IMMEDIATELY THEREAFTER PASSING THE REACTION MIXTURE CONTAINING VAPOR BUBBLES THROUGH THE TUBES OF SAID HEAT EXCHANGER TO REMOVE HEAT OF REACTION THEREFROM.
Claim 3
Dependent Claim
29 words
Process as claimed in claim 1, in which the Reynolds number of the stream, at least within the zone of introduction of the ethylene oxide, is greater than 2300.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |