Process for the production of a sticky polymer

Details Process for the production of a sticky polymer Process for the production of a sticky polymer

Filed on

1986-03-10

Date issued

1987-12-01

Examiner

Schofer, Joseph L.

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

Mixing of two or more solid polymers; mixing of solid...

Other Related Categories

525319, 525344, 525356, 526 65, 526 73, 526 88, 526901, 422134, C08F 234

Type

Patent

Status

active

Patent number

047105380

Description

ABSTRACT:
A process for the gas phase production of a sticky, but fluidizable, polymer comprising (i) introducing at least one gaseous monomer, which is a precursor for the polymer, into a bed of particles located in a fluidized bed reactor at a velocity sufficient to cause the particles to separate and act as a fluid; (ii) introducing into the bed a catalyst adapted to cause the monomer to polymerize; (iii) contacting the catalyst with the monomer at a temperature below the sticking temperature of the polymer and at a temperature and pressure sufficient to polymerize the monomer in the presence of the catalyst whereby the polymer is produced; and (iv) passing the polymer from the fluidized bed reactor into at least one fluid bed reactor wherein a fluidizing gas is passed through a bed of particles at a velocity sufficient to cause the particles to separate and act as a fluid; the polymer is passed through the fluid bed reactor in an essentially plug flow mode; and the polymer is maintained in an agitated state.

REFERENCES:
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patent: 3971768 (1976-07-01), Peters et al.
patent: 4129701 (1978-12-01), Jezl et al.
patent: 4188470 (1980-02-01), Collina et al.
patent: 4343926 (1982-08-01), Caumartin et al.
patent: 4372758 (1983-02-01), Bobst et al.
patent: 4482687 (1984-11-01), Noshay et al.
Chemical Reaction Eng'ing, Levenspiel, Wiley and Sons, N.Y. (1962), pp. 99, 100, 261, 295-296.

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