Stora Enso Oyj

Taminco Finland

Antero Laitinen

Ali Harlin

Jari Räsänen

Jukka Hietala

Olli Aaltonen

Outi Kylliäinen

Esko Tirronen

A method of deoxygenation of tall oil as well as methods for the production of aliphatic hydrocarbons and polymerizable monomers from tall oil. Sulphurous crude tall oil together with hydrogen gas is fed into a reactor comprising a catalyst bed. The oil is catalytically deoxygenated by hydrogen in the bed by use of a sulfided metal catalyst, e.g. a NiMoS catalyst. The flow exiting the reactor is cooled down and a hydrocarbon-bearing liquid phase is separated from a gas phase, followed by subjecting the liquid phase to distillation for removal of useless aromatic hydrocarbons and then to steam cracking to form a product containing olefins such as ethylene or propylene. By regulation of the deoxygenation temperature to be at least 270&#xb0; C. but less than 360&#xb0; C. the yield is rich in linear and cyclic aliphates that usefully turn to olefins in the steam cracking, while formation of napthalenes is reduced.

Methods of deoxygenation of tall oil and production of polymerizable monomers therefrom

The present invention relates to a method and an arrangement for separation and recovery of at least one carboxylic acid and furfural from a dilute aqueous mixture thereof. In the method of the present invention a dilute aqueous mixture comprising at least one carboxylic acid and furfural is extracted with methyltetrahydrofurane, and at least one carboxylic acid and furfural are recovered. The arrangement of the present invention comprises an extraction unitfor carrying out extraction of at least one carboxylic acid and furfural from dilute aqueous mixture with methyltetrahydrofuran, connected to distillation unitfor carrying out distillation of the extractfrom the extraction unit, and connected to acids distillation unitfor carrying out distillation of the bottom streamfrom the distillation unitto separate at least one carboxylic acid and furfural.

Method and an arrangement for separating at least one carboxylic acid and furfural from a dilute aqueous mixture thereof

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Antero Laitinen