The present invention relates to a method for separating off a substance from a solution, in which electromagnetic radiation is radiated into the solution, an intensity of the electromagnetic radiation which has been scattered by crystals located in the solution is detected, the detected intensity is compared with a desired intensity (I.sub.S) and the temperature of the solution is regulated depending on the difference between the detected intensity and the desired intensity (I.sub.S) in such a way that the amount of this difference is reduced. If the amount of the difference between the detected intensity and the desired intensity (I.sub.S) is less than a limiting value, a crystallization method is started in which crystals of the substance are obtained which are then separated off.

A process for simultaneously hydrating and oligomerizing a hydrocarbon feed comprising mixed olefins incudes the steps of: (a) introducing the hydrocarbon feed in the presence of water into a fixed bed; (b) contacting the hydrocarbon feed with a catalyst within said fixed bed reactor, where the catalyst is of the type that hydrates the mixed olefins to form mixed alcohols and oligomerizes at least a portion of the mixed olefins into oligomers to produce a first product stream that includes an organic phase and an aqueous phase; (c) introducing the first product stream into a first separator which separates the organic phase from the aqueous phase; (d) introducing the separated organic phase into a second separator which separates unreacted olefins from mixed alcohols and one or more oligomers which comprise a final product stream; and (e) introducing the separated aqueous phase into a third separator which separates an alcohol-water azeotrope component from water.

A process for simultaneously hydrating and oligomerizing a hydrocarbon feed comprising mixed olefins incudes the steps of: (a) introducing the hydrocarbon feed in the presence of water into a fixed bed; (b) contacting the hydrocarbon feed with a catalyst within said fixed bed reactor, where the catalyst is of the type that hydrates the mixed olefins to form mixed alcohols and oligomerizes at least a portion of the mixed olefins into oligomers to produce a first product stream that includes an organic phase and an aqueous phase; (c) introducing the first product stream into a first separator which separates the organic phase from the aqueous phase; (d) introducing the separated organic phase into a second separator which separates unreacted olefins from mixed alcohols and one or more oligomers which comprise a final product stream; and (e) introducing the separated aqueous phase into a third separator which separates an alcohol-water azeotrope component from water.

The present invention is related to a novel and improved process for the preparation of 3,7-dimethylnonan-1-ol.

The present invention is related to a novel and improved process for the preparation of 3,7-dimethylnonan-1-ol.

Acyclic monterpene alcohols, like linalool, to be converted through a series of highly efficient catalytic reactions a biogasoline blending component, and a drop-in biodiesel fuel.

Acyclic monterpene alcohols, like linalool, to be converted through a series of highly efficient catalytic reactions a biogasoline blending component, and a drop-in biodiesel fuel.

The present invention provides a process for the preparation of 1,4-butanediol and tetrahydrofuran said process comprising contacting furan with hydrogen and water in the presence of a supported catalytic composition comprising rhenium and palladium in a weight ratio of at least 1:1 and a total combined weight rhenium and palladium in the catalyst composition in the range of from 0.01 to 20 wt %.

The present invention provides a process for the preparation of 1,4-butanediol and tetrahydrofuran said process comprising contacting furan with hydrogen and water in the presence of a supported catalytic composition comprising rhenium and palladium in a weight ratio of at least 1:1 and a total combined weight rhenium and palladium in the catalyst composition in the range of from 0.01 to 20 wt %.

A method of making of 1,2,5,6-hexanetetrol (“tetrol”). The method includes the steps of contacting a reaction solution containing water as well as levoglucosenone, dihydrolevoglucosenone, and/or levoglucosanol, with a catalyst containing metal and acid functionalities, at temperature of from about 100° C. to about 175° C., and a hydrogen partial pressure of from about 1 bar to about 50 bar (about 0.1 MPa to about 5 MPa), and for a time wherein at least a portion of the reactant is converted into 1,2,5,6-hexanetetrol.