US4729877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the solid-bed polymerization of monomers
Assignee: BASF SE
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Filing: 1986-04-16
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Granted: 1988-03-08
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Expires: 2006-04-16
Abstract
Abstract A horizontal solid-bed polymerization reactor which is divided into a plurality of zones, for example a reaction zone, an after-reaction zone, a heating zone and a product discharge zone and possesses inlet and outlet openings for feeding substances into the zones and/or removing substances from the zones, the zones being separated from one another over a part of the reactor cross-section by means of weirs, wherein two drive shafts which are independent of one another and possess mixing elements are introduced into the solid-bed polymerization reactor in the middle.
Inventors
- 👤 Karl Hennig
- 👤 Karlheinz Messmer
- 👤 Guenter Hoerdt
- 👤 Gerhard Kleinpeter
- 👤 Werner Hoffmann
- 👤 Hans-Juergen Raubenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:59
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/10; B01J8/18; B01J8/24; B01J8/36; B01J8/38; B01J8/382; B01J2208/00; B01J2208/00796; B01J2208/00823; B01J2208/00831; B01J2208/0084; B01J2219/00; B01J2219/18; B01J2219/182; B29; B29B; B29B7/00; B29B7/02; B29B7/06; B29B7/10; B29B7/12; B29B7/16; B29B7/22; B29B7/24; B29B7/242; B29B7/244; B29B7/28; B29B7/286; B29B7/80; B29B7/82; B29B7/826; B29B7/84; B29B7/845; B29B7/88; B29B7/94
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A horizontal solid-bed polymerization reactor which is divided into a plurality of zones, comprising a reaction zone, an after-reaction zone, a heating zone and a product discharge zone and said reactor further having inlet and outlet openings for feeding substances into the zones and/or removing substances from the zones, the zones being separated from one another over a part of the reactor cross-section by means of weirs having variable free cross-sections, wherein drive shafts which are independent of one another and possess mixing elements located in the middle of the solid-bed polymerization reactor.
Claim 2
Dependent Claim
93 words
A horizontal solid-bed polymerization reactor which is divided into a plurality of zones, comprising a reaction zone, an after-reaction zone, a heating zone and a product discharge zone and said reactor further having inlet and outlet openings for feeding substances into the zones and/or removing substances from the zones, the zones being separated from one another over a part of the reactor cross-section by means of weirs having variable free cross-sections, wherein drive shafts which are independent of one another and possess mixing elements located in the middle of the solid-bed polymerization reactor.
Claim 3
Dependent Claim
21 words
A solid-bed polymerization reactor according to claim 1, wherein temperature sensors for the individual zones are mounted in the drive shafts.
Claim 4
Dependent Claim
15 words
A solid-bed polymerization reactor according to claim 1, wherein the drive shafts are arranged coaxially.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |