Process for letting down ethylene high pressure polymerization s

Details Process for letting down ethylene high pressure polymerization s Process for letting down ethylene high pressure polymerization s

1977-06-30

1978-09-19

Holler, Alan

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

Synthetic resins

Effecting a change in a polymerization process in response...

5263522, 528502, C08F 1002

Patent

active

041156382

ABSTRACT:
The invention relates to a process for rapidly letting-down the pressure in continuous high pressure polymerization systems for the polymerization of ethylene. In this process, the let-down hot reaction mixture is passed into an expansion vessel in such a way that the jet of let-down hot reaction mixture issuing from the let-down line is led into the partially water-filled expansion vessel at an angle of from 0.degree. to 45.degree. to the water surface, so that the jet does not enter below the surface but must touch or strike it. The method described makes it possible to let the mixture down partially and thus to slow down the decomposition in the case of explosive decomposition reactions occurring in the polymerization system.

REFERENCES:
patent: 2728753 (1955-12-01), Russum et al.
patent: 3079372 (1963-02-01), Fulknier et al.
patent: 3781256 (1973-12-01), Sadee et al.

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