Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-10-30
1993-01-12
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526127, 526128, 526136, 5263486, 526901, 526904, 526907, C08F 234
Patent
active
051791803
ABSTRACT:
The polymerization of certain alpha-olefins in a gas phase involves the problem of agglomeration of the product into particles disadvantageous from the viewpoint of its handling. In the present invention this problem has been solved by means of a new type of process for the homo- or copolymerization of alpha-olefins. In the process the catalyst system is pretreated by contacting and reacting a transition-metal compound which is solid or on a solid carrier with an organoaluminum compound, and possibly an electron donor, in a liquid medium, and by drying the thus formed reaction product to produce a solid catalyst system. The thus pretreated solid and active catalyst system is then fed together with an alpha-olefin in the gaseous state into a gas-phase reactor, and polymerization is carried out by contacting them with each other. By feeding a dry and active catalyst system into the gas-phase reactor, it is possible to avoid the agglomeration of the product which occurs in conventional processes in which an organoaluminum compound and possibly an electron donor are fed in a liquid medium into the reactor.
REFERENCES:
patent: 3784539 (1974-01-01), Ort
patent: 3984351 (1976-10-01), Rekers et al.
patent: 4343926 (1982-08-01), Caumartin et al.
patent: 4360560 (1982-11-01), Desvignes et al.
patent: 4511703 (1985-04-01), Bailly
patent: 4520163 (1985-05-01), Goodall
patent: 4525547 (1985-06-01), Kato et al.
patent: 4543389 (1985-09-01), Burstain et al.
patent: 4673662 (1987-06-01), Bailly
patent: 4684703 (1987-08-01), Wagner et al.
Ahvenainen Antero
Salminen Hannu
Soderberg Tarja
Tervonen Jari
Berggren OY AB
Teskin Fred
LandOfFree
Process for the gas-phase homo- or copolymerization of alpha-ole does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the gas-phase homo- or copolymerization of alpha-ole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the gas-phase homo- or copolymerization of alpha-ole will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1221071