The present invention relates to a method for depolymerising oxygenated polymer materials, in particular by nucleophilic catalysis and to the use of said method in the recycling of plastic materials and the preparation of aromatic and aliphatic compounds that can be used as fuel, synthesis intermediates, raw materials in the construction sector, and in the petrochemical, electrical, electronic, textile, aeronautical, pharmaceutical, cosmetic and agrochemical industry. The present invention also relates to a method for manufacturing fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetics, perfumes, food products, synthetic yarns and fibres, synthetic leathers, glues, pesticides, fertilisers comprising (i) a step of depolymerisation of oxygenated polymer materials according to the method of the invention and optionally (ii) a step of hydrolysis, and optionally (iii) a step of functionalisation and/or defunctionalisation.

The present invention relates to a method for preparing a dialkyi or dialkenyl ether of a cycloaliphatic or araliphatic diol, which comprises (i) reacting the cycloaliphatic or araliphatic diol with metallic sodium in an aprotic organic solvent in the presence of a catalytic amount of at least one monoether-monoalcohol of formula (I) wherein Y is identical or different and selected from C.sub.2-C.sub.4-alkylene, n is an integer in the range from 1 to 10, and R.sup.1 is C.sub.1-C.sub.4-Alkyl, whereby the corresponding disodium dialcoholate is obtained, reacting the disodium dialcoholate obtained in step (i) with an alkylation alkenylation reagent. ##STR00001##

The present invention relates to a method for preparing a dialkyi or dialkenyl ether of a cycloaliphatic or araliphatic diol, which comprises (i) reacting the cycloaliphatic or araliphatic diol with metallic sodium in an aprotic organic solvent in the presence of a catalytic amount of at least one monoether-monoalcohol of formula (I) wherein Y is identical or different and selected from C.sub.2-C.sub.4-alkylene, n is an integer in the range from 1 to 10, and R.sup.1 is C.sub.1-C.sub.4-Alkyl, whereby the corresponding disodium dialcoholate is obtained, reacting the disodium dialcoholate obtained in step (i) with an alkylation alkenylation reagent. ##STR00001##

The compound having a high refractive index characteristic and a high transmittance is a (meth)acrylate compound represented by the following general formula (1):

##STR00001##

in the general formula (1), X represents a phenylene group, Z.sub.1 to Z.sub.3 are selected from the group consisting of a phenyl group, a heteroaryl group, a phenylene group, a heteroarylene group, a phenylalkylene group having an alkylene group having 1 or more to 4 or less carbon atoms, and a heteroaralkylene group having an alkylene group having 1 or more to 4 or less carbon atoms, P.sub.1 to P.sub.3 are selected from the group consisting of an acryloyloxy group and a methacryloyloxy group, A is selected from the group consisting of an aryl group, a heteroaryl group, an arylene group, and a heteroarylene group, and “m” and “n” each represent 0 or 1, provided that when the “m” represents 0, the “n” represents 0.

The compound having a high refractive index characteristic and a high transmittance is a (meth)acrylate compound represented by the following general formula (1):

##STR00001##

in the general formula (1), X represents a phenylene group, Z.sub.1 to Z.sub.3 are selected from the group consisting of a phenyl group, a heteroaryl group, a phenylene group, a heteroarylene group, a phenylalkylene group having an alkylene group having 1 or more to 4 or less carbon atoms, and a heteroaralkylene group having an alkylene group having 1 or more to 4 or less carbon atoms, P.sub.1 to P.sub.3 are selected from the group consisting of an acryloyloxy group and a methacryloyloxy group, A is selected from the group consisting of an aryl group, a heteroaryl group, an arylene group, and a heteroarylene group, and “m” and “n” each represent 0 or 1, provided that when the “m” represents 0, the “n” represents 0.

The present invention relates to a method for preparing a dialkyi or dialkenyl ether of a cycloaliphatic or araliphatic diol, which comprises (i) reacting the cycloaliphatic or araliphatic diol with metallic sodium in an aprotic organic solvent in the presence of a catalytic amount of at least one monoether-monoalcohol of formula (I) wherein Y is identical or different and selected from C.sub.2-C.sub.4-alkylene, n is an integer in the range from 1 to 10, and R.sup.1 is C.sub.1-C.sub.4-Alkyl, whereby the corresponding disodium dialcoholate is obtained, reacting the disodium dialcoholate obtained in step (i) with an alkylation alkenylation reagent.

The present invention relates to a method for preparing a dialkyi or dialkenyl ether of a cycloaliphatic or araliphatic diol, which comprises (i) reacting the cycloaliphatic or araliphatic diol with metallic sodium in an aprotic organic solvent in the presence of a catalytic amount of at least one monoether-monoalcohol of formula (I) wherein Y is identical or different and selected from C.sub.2-C.sub.4-alkylene, n is an integer in the range from 1 to 10, and R.sup.1 is C.sub.1-C.sub.4-Alkyl, whereby the corresponding disodium dialcoholate is obtained, reacting the disodium dialcoholate obtained in step (i) with an alkylation alkenylation reagent.

The disclosure relates to dicarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The disclosure relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The disclosure relates to dicarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The disclosure relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The present disclosure relates to a new catalytic process for the production of methanol from carbon dioxide, comprising: (1) the conversion of carbon dioxide and hydrogen to formic acid or formate salts; (2) converting the formic acid or formate salts to diformate esters of diols; (3) hydrogenating the diformate esters to methanol and diols. The diols produced from the hydrogenation reaction can be recovered and re-used to prepare the diformate esters.