Patent US3876602A successfully refreshed from Google Patents.
US3876602A
Expired / Lapsed
US
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Particulate catalyst injection method in polyolefin production
Assignee: Union Carbide Corp
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Filing: 1973-06-14
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Granted: 1975-04-08
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Expires: 1993-06-14
Abstract
Abstract Apparatus is provided for injecting finely divided solid materials into a reaction zone. The apparatus includes a reservoir, selected means for advancing a predetermined particle size of solid materials to the lower portion of the reservoir, metering means for metering predetermined amounts of solid materials selected by the selecting means to gas entrainment means and conduit means to deliver gas entrained solid material into a reaction chamber, the conduit means including a capillary tube having an inside diameter of 0.030 to 0.125 inches. A method for injecting finely divided solid materials into a polymerizing reaction chamber for producing polyolefin is also included.
Inventors
- 👤 William Lamont Calvert
- 👤 Richard Herman Handwerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:23
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A METHOD FOR PRODUCING POLYOLEFIN BY CATALYTICALLY POLYMERIZING A FIRST GASEOUS STREAM OF POLYMERIZABLE OLEFIN MONOMER IN THE REACTION ZONE OF A FLUIDIZED BED REACTOR SAID FIRST GASEOUS STREAM OF POLYMERIZABLE MONOMER BEING CONTINUOUSLY FED TO SAID REACTION ZONE WHILE SAID REACTION ZONE IS MAINTAINED AT A PRESSURE WHICH IS SUBSTANTIALLY ABOVE ATMOSPHERIC PRESSURE AND AT A TEMPERATURE WHICH IS BELOW THE SINTERING TEMPERATURE OF SAID POLYOLEFIN WHICH COMPRISES INTRODUCING A PRESSURIZED SECOND GAS STREAM CONTAINING A FINELY DIVIDED SOLID OLEFIN POLYMERIZATION CATALYST IN THE FORM OF FREE FLOWING PARTICLES HAVING A MAXIMUM PARTICLE SIZE OF ABOUT 0.030 INCHES IN THEIR GREATEST DIAMETER INTO THE POLYMERIZABLE MONOMER IN SAID REACTION ZONE, SAID SECOND GAS STREAM BEING INTRODUCED INTO THE POLYMERIZABLE MONOMER IN SAID REACTION ZONE UNDER A PRESSURE GREATER THAN THAT IN SAID REACTION ZONE AND THROUGH AN ELONGATED, CYLINDRICAL ZONE HAVING AN INSIDE DIAMETER WHICH IS AT LEAST APPROXIMATELY THREE TIMES THE LARGEST DIAMETER OF SAID PARTICLES, AND MAINTAINING THE CONTACT OF SAID CATALYST WITH SAID FIRST GASEOUS STREAM UNDER SAID TEMPERATURE AND PRESSURE IN SAID REACTION ZONE FOR A SUFFICIENT PERIOD OF TIME TO PRODUCE POLYOLEFIN IN SAID REACTION ZONE.
Claim 2
Independent Claim
192 words
A METHOD FOR PRODUCING POLYOLEFIN BY CATALYTICALLY POLYMERIZING A FIRST GASEOUS STREAM OF POLYMERIZABLE OLEFIN MONOMER IN THE REACTION ZONE OF A FLUIDIZED BED REACTOR SAID FIRST GASEOUS STREAM OF POLYMERIZABLE MONOMER BEING CONTINUOUSLY FED TO SAID REACTION ZONE WHILE SAID REACTION ZONE IS MAINTAINED AT A PRESSURE WHICH IS SUBSTANTIALLY ABOVE ATMOSPHERIC PRESSURE AND AT A TEMPERATURE WHICH IS BELOW THE SINTERING TEMPERATURE OF SAID POLYOLEFIN WHICH COMPRISES INTRODUCING A PRESSURIZED SECOND GAS STREAM CONTAINING A FINELY DIVIDED SOLID OLEFIN POLYMERIZATION CATALYST IN THE FORM OF FREE FLOWING PARTICLES HAVING A MAXIMUM PARTICLE SIZE OF ABOUT 0.030 INCHES IN THEIR GREATEST DIAMETER INTO THE POLYMERIZABLE MONOMER IN SAID REACTION ZONE, SAID SECOND GAS STREAM BEING INTRODUCED INTO THE POLYMERIZABLE MONOMER IN SAID REACTION ZONE UNDER A PRESSURE GREATER THAN THAT IN SAID REACTION ZONE AND THROUGH AN ELONGATED, CYLINDRICAL ZONE HAVING AN INSIDE DIAMETER WHICH IS AT LEAST APPROXIMATELY THREE TIMES THE LARGEST DIAMETER OF SAID PARTICLES, AND MAINTAINING THE CONTACT OF SAID CATALYST WITH SAID FIRST GASEOUS STREAM UNDER SAID TEMPERATURE AND PRESSURE IN SAID REACTION ZONE FOR A SUFFICIENT PERIOD OF TIME TO PRODUCE POLYOLEFIN IN SAID REACTION ZONE.
Claim 3
Dependent Claim
15 words
A method as in claim 1 in which said reaction zone is maintained at a
Claim 4
Dependent Claim
29 words
A method as in claim 2 in which second gas stream is introduced into said reaction zone at a velocity of about 10 to about 150 feet per second.
Claim 5
Dependent Claim
29 words
A method as in claim 3 in which said second gas stream is introduced into said reaction zone at a velocity of about 40 to about 100 feet per
Claim 6
Dependent Claim
49 words
A method as in claim 1 for producing polyolefin by catalytically polymerizing ethylene at a pressure of about 40 to 300 psi and at a temperature of about 90.degree. to 110.degree.C. and wherein said second gas stream is introduced into said reaction zone at a velocity of about 10
Claim 7
Dependent Claim
26 words
A method as in claim 1 in which said olefin polymerization catalyst has a particle size of about 0.010 to about 0.030 inches in its greatest
Claim 8
Dependent Claim
14 words
A method as in claim 6 in which said elongated cylindrical zone has an
Claim 9
Dependent Claim
14 words
A method as in claim 7 in which said elongated cylindrical zone has an
Claim 10
Dependent Claim
55 words
A method as in claim 7 for producing polyolefin by catalytically polymerizing ethylene at a pressure of about 40 to 300 psi and at a temperature of about 90.degree. to 110.degree.C. and wherein said second gas stream is introduced into said reaction zone at a velocity of about 10 to about 150 feet per second.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |