Abstract: The invention relates to a process for L-Iditol by hydrogenating L-Sorbose. Further, the invention also relates to a use of a transition metal complex as hydrogenation catalyst for L-Sorbose. The invention relates to a process for the preparation of L-Iditol comprising at least one reaction step, in which a composition comprising L-Sorbose and hydrogen is reacted in the presence of a transition metal catalyst complex in a homogeneous solution, wherein the transition metal catalyst complex comprises at least one chiral ligand containing at least one phosphorus atom, which is capable of coordinating to the transition metal, and wherein the transition metal is selected from metals of groups 8, 9 and 10 of the periodic table of the elements according to IUPAC. The invention further relates to a use of a transition metal complex as defined above and below as hydrogenation catalyst for compositions comprising L-Iditol or mixtures thereof.

Abstract: The present invention relates to a process for the preparation of a polyarylether copolymer (P), the polyarylether copolymer (P) obtained by the process and a process for the preparation of a membrane comprising the polyarylether copolymer (P) and the membrane itself.

Abstract: A process for the preparation of L-lditol comprising at least the process steps: i) a L-Sorbose comprising composition is subjected to hydrogenation with hydrogen in the presence of a hydrophobic stereoselective ruthenium catalyst complex in a homogeneous solution, wherein the ruthenium catalyst complex comprises at least one chiral ligand containing at least two phosphorus atom, which are capable of coordinating to the ruthenium yielding in a composition comprising L-lditol as the main product; ii) separation of the reaction products produced in step i) from the ruthenium catalyst complex; iii) reactivating the separated ruthenium catalyst complex of step ii) by adding a chloride source and reusing the reactivated ruthenium catalyst complex in step i).

Abstract: Disclosed herein are a process for forming an alkyl ester of levulinic acid or one or more reaction products obtained by chemically converting the alkyl ester of levulinic acid, a and a method of using a pressurized continuous flow reactor system for forming one or more alkyl esters of levulinic acid in the process.

Abstract: A process to produce propanol and iso-propanol (bio-propanol), a biocomponent for gasoline relates to the conversion of bio-glycerin to bio-propanol and bio-iso-propanol. In particular, a process is related for the conversion of glycerin, in particular glycerin from renewable sources, to propanols, the process including the following steps: (a) hydrogenating a glycerin phase with a Co—Cu—Mn—Mo based hydrogenation catalyst to give an effluent containing water and an organic mixture of more than 40 wt % of a mixture of ethanol, 1-propanol and 2-propanol and the rest being unreacted propanediols and glycerin, with traces of ethylene glycol; (b) separating by mainly distillation the ethanol, 1-propanol and 2-propanol mixture from the other components in the effluent of step a); and (c) optionally, recycling all or part of the unreacted propandiols and glycerin deriving from steps a) and/or b) to the hydrogenation step a).

Abstract: The present invention relates to polyester polyols comprising units derived from a) at least one component (A) carrying at least one COOH group or a derivative thereof, wherein component (A) comprises (i) at least one compound carrying two COOH groups or derivatives thereof (A1), and b) at least one component (B) carrying at least one OH group and no COOH group, wherein component (B) comprises (ii) optionally at least one compound or oligomer carrying at least three OH groups and no COOH group (B1), (iii) at least one compound carrying two OH groups (B2) of formula wherein n and m are independently from each other 0 or 1, and R1 and R2 are independently selected from the group consisting of H, CH3 and CH2CH3, and (iv) optionally at least one compound, oligomer or polymer carrying two OH groups and no COOH group, which is different from B2 (B3), and to an organic solvent-based two-component coating composition comprising a) a first component (K1) comprising (i) at least one polyester pol

Abstract: The present invention relates to polyester polyols comprising units derived from a) at least one component (A) carrying at least one COOH group or a derivative thereof, wherein component (A) comprises (i) at least one compound carrying two COOH groups or derivatives thereof (A1), and b) at least one component (B) carrying at least one OH group and no COOH group, wherein component (B) comprises (ii) at least one compound or oligomer carrying at least three OH groups and no COOH group (B1), (iii) at least one compound carrying two OH groups (B2) selected from the group consisting of B2a and B2c, wherein n and m are independently from each other 0 or 1, and R1 and R2 are independently selected from the group consisting of H, CH3 and CH2CH3, and (iv) optionally at least one compound, oligomer or polymer carrying two OH groups and no COOH group, which is different from B2 (B3), wherein the molar ratio of the OH groups of components B1 to the sum of OH groups of components B1, B2 and B3 is in the

Abstract: The invention relates to a process for L-Iditol by hydrogenating L-Sorbose. Further, the invention also relates to a use of a transition metal complex as hydrogenation catalyst for L-Sorbose. The invention relates to a process for the preparation of L-Iditol comprising at least one reaction step, in which a composition comprising L-Sorbose and hydrogen is reacted in the presence of a transition metal catalyst complex in a homogeneous solution, wherein the transition metal catalyst complex comprises at least one chiral ligand containing at least one phosphorus atom, which is capable of coordinating to the transition metal, and wherein the transition metal is selected from metals of groups 8, 9 and 10 of the periodic table of the elements according to IUPAC. The invention further relates to a use of a transition metal complex as defined above and below as hydrogenation catalyst for compositions comprising L-Iditol or mixtures thereof.