Borealis Ag

Neste Oyj

Jukka Räsänen

Erik A Eriksson

Mohammad Al-Haj Ali

Sameer Vijay

Henry Sleijster

Samuli Zitting

Guhan Mathivanan

Christof Wurnitsch

Klaus Nyfors

Vasileios Kanellopoulos

Jukka Hietala

Jani Aho

Virpi Rämö

Michiel Bergstra

Mikko Lylykangas

Anja Leminen

Pekka Malinen

Jouni Takakarhu

A process for combined renewable 1-decene and renewable carboxylic diacid production from a fatty acid ester containing feedstock, wherein the feedstock is first subjected to metathesis reaction conditions, recovery of 1-decene and then to microbial oxidation to yield diacids in a fermentation broth. Diacids of unusual carbon chains lengths are thereby obtainable.

Renewable chemical production engaging metathesis and microbial oxidation

Herein is provided a process for producing renewable products, such as alkenes, from a feedstock of biological origin. The process includes subjecting a feedstock including fatty acid glycerides and optionally free fatty acids, wherein at least one hydrocarbon chain is unsaturated, to esterification reaction in the presence of an alcohol. The ester stream thereby obtained is then fractionated and a fraction including esters of unsaturated C18 fatty acids is subjected to metathesis conditions in the presence of an alkene to obtain metathesis products. Fractionation of the metathesis products includes recovery of at least renewable 1-decene, and unsaturated C10-C15 fatty acid esters.

Renewable alkene production engaging metathesis

The present invention relates to a process for removing hydrocarbons comprising the steps of:

Method of recovering olefins in a solution polymerisation process

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 relates to a process for removing hydrocarbons comprising the steps of: (A) passing a stream of a solution into a separator wherein a liquid phase comprising polymer and a vapor phase coexist; (B) withdrawing a vapor stream and a concentrated solution stream from the separator; (C) passing at least a part of the vapour stream into a first fractionator; (D) withdrawing a first overhead stream and a first bottom stream from the first fractionator; (E) passing the first bottom stream to a second fractionator; (F) withdrawing a second overhead stream and a second bottom stream from the second fractionator; characterized in that at least a part of the second overhead stream is withdrawn as a purge stream.

Method of recovering olefins in a solution polymerization process

The present invention deals with a process for polymerising olefins in a solution and withdrawing a stream of the solution from the polymerisation reactor and passing it to a sequence of heating steps. The heated solution is passed to a separation step, which is conducted at a pressure of no more than 15 bar and in which separation step a liquid phase comprising the polymer and a vapour phase coexist. A vapour stream and a concentrated solution stream comprising the polymer are withdrawn from the separation step. At least a part of the vapour stream is passed to the first polymerisation reactor, to the second polymerisation reactor or to both.

Process and apparatus for in-line blending of polymers

A process for withdrawing polyolefins from a reactor includes: continuously withdrawing a liquid solution stream from a solution polymerization reactor and passing the liquid solution stream into a low pressure separator; withdrawing a first vapour stream and a first liquid stream from the separator and passing the first vapour stream into a washing column; withdrawing a second vapour stream from the washing column and feeding it via a condenser line to a condenser; cooling the second vapour stream in the condenser so that part of the second vapour stream condenses, producing a condensed second vapour stream and an uncondensed second vapour stream; passing the condensed second vapour stream to an upper part of the washing column via a reflux line; withdrawing a second liquid stream from the washing column and passing at least part of the second liquid stream to the separator via a recycling line; and recovering heat.

Process for withdrawing polyolefins

An in-line blending process for polymers comprising: (a) providing two or more reactor-low pressure separator units () in parallel configuration, each reactor-low pressure separator unit comprising one reactor () fluidly connected to one low pressure separator () downstream and further a recycling line () connecting the low pressure separator () back to the corresponding reactor (); (b) polymerizing olefin monomers having two or more carbon atoms in each of the reactors () in solution polymerisation; (c) forming an unreduced reactor effluents stream including a homogenous fluid phase polymer-monomer-solvent mixture in each of the reactors (), (d) passing the unreduced reactor effluents streams from each of the reactors () through the corresponding low pressure separators (), whereby the temperature and pressure of the low pressure separators () is adjusted such that a liquid phase and a vapour phase are obtained, whereby yielding a polymer-enriched liquid phase and a polymer-lean vapour phase, and (e) separating the polymer-lean vapour phase from the polymer-enriched liquid phase in each of the low-pressure separators () to form separated polymer-lean vapour streams and separated polymer-enriched liquid streams; (f) combining the polymer-enriched liquid streams from step (e) in a further low-pressure separator and/or a mixer () to produce a combined polymer-enriched liquid stream (); (g) reintroducing the polymer-lean vapour streams from step (e) via recycling lines () into the corresponding reactors ().

In-line blending process

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.

Growing community of inventors

Tolkkinen, Finland

Jukka Räsänen