Method and equipment for the preparation of a carrier of a polym

Details Method and equipment for the preparation of a carrier of a polym Method and equipment for the preparation of a carrier of a polym

1990-10-17

1993-06-01

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Irradiation by, or application of, electrical, magnetic or...

502 9, 502 10, 502125, 502134, C08F 402

Patent

active

052159493

ABSTRACT:
In conventional spraying methods the problem in the preparation of small carrier particles aimed for the polymerization is that the drops constituting the prestages of the particles agglomerate or form otherwise in different sizes, whereby the size distribution of the carrier particles becomes too broad. This leads due to the so-called replica phenomenon to a polymer product having also a too broad particle size distribution. In the present invention the carrier is prepared by spraying a liquid containing a carrier through a nozzle into inert gas so that its first forms small droplets, which then solidify to small carrier particles. The desired narrow particle size distribution is provided by feeding a liquid containing a carrier through a nozzle, in which or in connection with which the liquid drops by means of the standing sonic waves in the ultrasonic range into small droplets of uniform size. The droplets of uniform size solidify then into small carrier particles of equally uniform size.

REFERENCES:
patent: 3644130 (1972-02-01), Evans et al.
patent: 4019683 (1977-04-01), Asai et al.
patent: 4071674 (1978-06-01), Kashiwa et al.
patent: 4421674 (1983-12-01), Invernizzi et al.
patent: 4623706 (1986-11-01), Timm et al.
patent: 4829034 (1989-05-01), Iiskolan et al.
patent: 4871489 (1989-10-01), Ketcham

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