Claims
- 1. A reactor for carrying out demonomerization and postpolymerization having a cylindrical wall with a horizontal axis, and which has a top and a bottom portion in which polymer melt can be placed, an interior rotor in the form of a cage arranged concentrically around said reactor axis and rotatably movable around said axis, said cage having around its periphery ring-shaped elements which are capable of partly dipping into melt which is placed in said reactor; said ring-shaped elements being inclined toward a plane perpendicular to the reactor axis wherein the inclination differs from the inclination of each adjacent element by a fixed angle, said ring-shaped elements thereby forming a screw-line, said ring-shaped elements being capable of propelling melt through the reactor at a desired speed proportional to said angle; said reactor also having weirs fixed at the bottom portion of the cylinder and located between said ring-shaped elements, said weirs being capable of preventing melt from flowing straight along the bottom of the reactor without being raised above the surface of the melt by the ring-shaped elements; said reactor thereby providing means for simultaneously removing volatiles, mixing polymer melt and controlling and achieving substantially uniform retention time for said melt in the reactor.
- 2. A reactor according to claim 1 wherein said weirs are shaped such that their cross-section when taken along the axial direction of the reactor is a circular section.
- 3. A reactor according to claim 1 wherein the weirs have varying flow openings, the total cross section of which grows toward one end of the reactor.
- 4. A reactor according to claim 1 wherein the ring-shaped elements are perforated plates.
- 5. A reactor according to claim 1 wherein the ring-shaped elements are spoke wheels.
- 6. A reactor according to claim 1 wherein the ring-shaped elements are sieve disks.
- 7. A reactor according to claim 1 wherein said rotor cage has rods arranged parallel to the reactor axis thereby connecting the ring-shaped elements.
- 8. A reactor according to claim 1 wherein said cage has additional bucket bars at its periphery which extend over at least part of the reactor.
Priority Claims (1)
Number |
Date |
Country |
Kind |
83730095 |
Oct 1983 |
EPX |
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Parent Case Info
This is a division of application Ser. No. 658,817, filed Oct. 9, 1984, now U.S. Pat. No. 4,540,774, issued Sept. 10, 1985.
US Referenced Citations (5)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2309027 |
Aug 1974 |
DEX |
2114080 |
Aug 1977 |
DEX |
51-97684 |
Aug 1976 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
658817 |
Oct 1984 |
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