US3956256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing ethene at high pressure and temperature
Assignee: Stamicarbon BV
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Filing: 1974-09-12
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Granted: 1976-05-11
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Expires: 1994-09-12
Abstract
Abstract A process and apparatus for the continuous polymerization of ethene at high pressures and temperatures, in the presence of an initiator. Reaction is carried out in a cylindrical autoclave wherein ethene is fed into the autoclave at a high velocity through nozzles having a restricted opening. The nozzles are fitted and mounted on the autoclave in at least two different places at an angle which is acute to the central axis of the autoclave whereby the direction of flow of the ethene coming from the nozzles is substantially parallel and opposite.
Inventors
- 👤 Frederik J. P. J. Mercx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:40
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/04; B01J3/042; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
81 words
In a process for the continuous polymerization of ethene at high pressure and temperature in a cylindrical autoclave in the presence of an initiator which comprises feeding ethene into the autoclave at a high velocity, the improvement which comprises: feeding the ethene into the autoclave in at least two places, at an angle which is acute to the central axis of said autoclave such that the directions of flow of the ethene currents at said places are substantially parallel and opposite.
Claim 2
Dependent Claim
81 words
In a process for the continuous polymerization of ethene at high pressure and temperature in a cylindrical autoclave in the presence of an initiator which comprises feeding ethene into the autoclave at a high velocity, the improvement which comprises: feeding the ethene into the autoclave in at least two places, at an angle which is acute to the central axis of said autoclave such that the directions of flow of the ethene currents at said places are substantially parallel and opposite.
Claim 3
Dependent Claim
41 words
A process according to claim 1, wherein ethene is fed into the autoclave at two places on either side of the bisecting plane perpendicular to said central axis of the autoclave, the directions of ethene flow being away from said plane.
Claim 4
Dependent Claim
32 words
A process according to claim 2, wherein the ethene is fed into the autoclave at places that are at one-tenth to one-fourth of the length of the autoclave from said bisecting plane.
Claim 5
Dependent Claim
30 words
A process according to claim 1, wherein the angle included by the direction of the ethene feed and the central axis of the autoclave is between about 5° and 45°.
Claim 6
Dependent Claim
15 words
A process according to claim 4, wherein said angle is between about 10° and 30°.
Claim 7
Dependent Claim
28 words
A process according to claim 1, wherein the ethene is fed into the autoclave such that the direction of ethene flow crosses the central axis of the autoclave.
Claim 8
Dependent Claim
22 words
A process according to claim 1, wherein ethene is also fed tangentially into the autoclave at a place between said two places.
Claim 9
Independent Claim
64 words
An apparatus suitable for reacting and continuously polymerizing ethene at high temperatures and pressures in the presence of an initiator which comprises: a. a cylindrical autoclave having thick-walls, and b. at last two restricted feed nozzles mounted on and directed into said autoclave at an acute angle to the central axis of said autoclave, the directions of the nozzles being both parallel and opposite.
Claim 10
Independent Claim
64 words
An apparatus suitable for reacting and continuously polymerizing ethene at high temperatures and pressures in the presence of an initiator which comprises: a. a cylindrical autoclave having thick-walls, and b. at last two restricted feed nozzles mounted on and directed into said autoclave at an acute angle to the central axis of said autoclave, the directions of the nozzles being both parallel and opposite.
Claim 11
Dependent Claim
25 words
The apparatus of claim 8, wherein said nozzles are fitted on either side of the bisecting plane perpendicular to said central axis of the autoclave.
Claim 12
Dependent Claim
23 words
The apparatus of claim 9, wherein said nozzles are at one-tenth to one-fourth of the length of the autoclave from said bisecting plane.
Claim 13
Dependent Claim
24 words
The apparatus of claim 8, wherein said nozzles are mounted at an angle of between about 5°-45° to the central axis of the autoclave.
Claim 14
Dependent Claim
16 words
The apparatus of claim 11, wherein said nozzles are mounted at an angle between about 10°-30°.
Claim 15
Dependent Claim
25 words
The apparatus of claim 8, wherein said nozzles are arranged so that the central axis of the nozzles crosses the central axis of the autoclave.
Claim 16
Dependent Claim
27 words
The apparatus of claim 8, further comprising a tangential nozzle fitted and mounted between said nozzles mounted at an angle to the central axis of the autoclave.
Claim 17
Dependent Claim
24 words
The apparatus of claim 8, further comprising a stirring mechanism mounted in the autoclave for making the autoclave contents rotate about the central axis.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |