Method for recovering transition metal tetrahalide and hydrocarbons from a waste stream
AssigneeBorealis AG
InventorsMikko Lylykangas, Jukka Räsänen, Klaus Nyfors, Pekka Malinen
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Abstract
The present invention provides a process for recovering transition metal tetrahalides from a waste stream coming from a catalyst manufacturing process by (a) establishing a mixed stream comprising transition metal tetrahalide and transition metal alkoxyhalides; (b) forming a falling liquid film from the mixed stream of step (a) at a temperature of from 25 to 85° C. and an absolute pressure of from 0.05 to 0.6 bar; and (c) establishing from the film of step (b) a first vapour stream containing from 90 to 100% of recoverable components and a second liquid stream containing about 10 to 80% of titanium haloalkoxides.
Claims13
A process for recovering a transition metal tetrahalide from a process stream comprising the steps of:
- (a) Establishing a mixed stream comprising the transition metal tetrahalide and transition metal haloalkoxides;
- (b) Forming a falling liquid film from the mixed stream of step (a) at a temperature of from 50 to 85° C. and an absolute pressure of from 0.1 to 0.6 bar;
- (c) Establishing from the film of step (b) a first stream containing from 90 to 100% of recoverable components and a second stream containing about 20 to 80% of transition metal haloalkoxides.
Dependencies are inferred from the claim text.