Borealis Ag

Yara Suomi Oy

Mikko Lylykangas

Klaus Nyfors

Pekka Malinen

Sameer Vijay

Lauri Huhtanen

Jari Aarila

Jari Äärilä

Henrik Andtsjo

Pertti Elo

Juhani Poukari

Michael Bartke

Ismo Lehtiniemi

Jukka Räsänen

Kimmo Hakala

Heikki Hero

Jari Hatonen

Pasi Matikainen

Soile Rautio

Henrik Andtsjö

Tom Elovirta

Jari Hätönen

Jeannette Aumo

Eira Johansson

Robert John Milborne

Harri Kiiski

Jukka RÄSÄNEN

Jeanette Aumo

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&#xb0; 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.

Method for recovering transition metal tetrahalide and hydrocarbons from a waste stream

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&#xb0; C. and an absolute pressure of from 0.05 to 0.6 bar; and (c) establishing from the film of step (b) a first vapor stream containing from 90 to 100% of recoverable components and a second liquid stream containing about 10 to 80% of titanium haloalkoxides.

Process and apparatus for recovering polymer from a gas phase reactor having a distribution plate via an outlet vessel comprising at least one apparatus for the breakup of polymeric agglomerates, the apparatus further comprising a feed pipe connecting the gas phase reactor and the outlet vessel a return gas line connecting the gas phase reactor and the outlet vessel, means for varying the flow rate through the return gas line from the outlet vessel to the gas phase reactor, and means for varying the outlet rate of polymer product from the outlet vessel.

Method for recovering polymer and apparatus therefor

The present application provides a process for polymerizing at least one olefin in the presence of a polymerization catalyst, including: (A) continuously introducing a first liquid with a transition metal compound, an organometallic compound, and a solvent and a second liquid into an emulsification stage, (B) continuously withdrawing the emulsion and directing it into a solidification stage to form a slurry with a solid polymerization catalyst component, (C) continuously recovering the solid polymerization catalyst component, (D) directing the solid polymerization catalyst component into a first prepolymerization stage with a monomer and a second liquid to form a slurry, (E) recovering a prepolymerized solid polymerization catalyst component, (F) continuously introducing the prepolymerized solid polymerization catalyst component into a second prepolymerization stage with an olefin monomer to form a prepolymerized catalyst, and (G) continuously withdrawing the prepolymerized catalyst and directing it into a subsequent polymerization stage with at least one olefin monomer.

Process for olefin polymerization

The invention relates to a fertilizer granule comprising both a nitrate and urea as the main nitrogen source. A mineral added during production is an important component in the composition, said mineral stabilizing these otherwise poorly compatible nitrogen compounds. A high nitrogen content is thus attained with ammonium nitrate concentrations falling below maximum limit values set by international legislation and classification, while at the same time the explosion risk particularly associated with the use of ammonium nitrate is avoided. The invention is also directed to a process for the production of the fertilizer granule of the above type, said process resulting in a fertilizer granule with excellent resistance properties and a high nitrogen content, wherein said granule may be coated by methods typical in the art, if desired.

Fertilizer granules and manufacturing process thereof

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Vantaa, Finland

Mikko Lylykangas