The present invention is directed to a method for preparing a final phenolic product from biomass comprising the steps of providing a furanic compound obtainable from biomass; reacting the furanic compound with a dienophile to obtain a phenolic compound; reacting the phenolic compound further to obtain the final phenolic product.

The present invention is directed to a method for preparing a final phenolic product from biomass comprising the steps of providing a furanic compound obtainable from biomass; reacting the furanic compound with a dienophile to obtain a phenolic compound; reacting the phenolic compound further to obtain the final phenolic product.

The present invention relates to the technical field of medicines, and in particular to a hydroxytyrosol nicotinamide eutectic crystal, a preparation method therefor and a composition thereof. In the hydroxytyrosol nicotinamide eutectic crystal of the present invention, a molar ratio of hydroxytyrosol to nicotinamide is 1:1, and cell parameters are as follows: a=9.4999, b=11.8285, c=11.4439, ?=90?, ?=96.628?, and ?=90?. The hydroxytyrosol nicotinamide eutectic crystal of the present invention is high in melting point, does not absorb moisture and is good in stability, and the application convenience of the hydroxytyrosol is greatly improved. The composition directly prepared by means of a grinding method has the advantages of high yield and low cost, and is suitable for large-scale application.

The present invention relates to the technical field of medicines, and in particular to a hydroxytyrosol nicotinamide eutectic crystal, a preparation method therefor and a composition thereof. In the hydroxytyrosol nicotinamide eutectic crystal of the present invention, a molar ratio of hydroxytyrosol to nicotinamide is 1:1, and cell parameters are as follows: a=9.4999, b=11.8285, c=11.4439, ?=90?, ?=96.628?, and ?=90?. The hydroxytyrosol nicotinamide eutectic crystal of the present invention is high in melting point, does not absorb moisture and is good in stability, and the application convenience of the hydroxytyrosol is greatly improved. The composition directly prepared by means of a grinding method has the advantages of high yield and low cost, and is suitable for large-scale application.

The present invention relates to a phosphorous ester compound represented by the formula (I):

##STR00001## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, a stabilizer for an organic material comprising the phosphorous ester compound, a method for stabilizing an organic material in which the phosphorous ester compound is added to an organic material, and a stabilized organic material composition comprising an organic material and a phosphorous ester compound.

A process for the purification of extracts poor in hydroxytyrosol (HT) without the use of organic solvents in order to obtain concentrated HT products. More specifically, a process to obtain concentrated hydroxytyrosol (HT) extracts using as raw material poor HT extracts (less than 5% HT d.b) derived from the olive industry, without the use of organic solvents, comprising the following steps: a) adjusting the pH of the poor HT extract to a pH value less than 7 using a pH regulator; b) loading the poor HT extract onto a weak base anion exchange resin of polystyrene, styrene, divinylbenzene, polydivinylbenzene, polystyrene-DVB, or styrene-DVB matrix; c) eluting the resin using hot water at a temperature between 50-100? C. to obtain a purified HT extract.

A process for the purification of extracts poor in hydroxytyrosol (HT) without the use of organic solvents in order to obtain concentrated HT products. More specifically, a process to obtain concentrated hydroxytyrosol (HT) extracts using as raw material poor HT extracts (less than 5% HT d.b) derived from the olive industry, without the use of organic solvents, comprising the following steps: a) adjusting the pH of the poor HT extract to a pH value less than 7 using a pH regulator; b) loading the poor HT extract onto a weak base anion exchange resin of polystyrene, styrene, divinylbenzene, polydivinylbenzene, polystyrene-DVB, or styrene-DVB matrix; c) eluting the resin using hot water at a temperature between 50-100? C. to obtain a purified HT extract.

A method of depolymerizing lignin and to the use of this method in the production of fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetic products, perfumes, foodstuffs, synthetic threads and fibers, synthetic leathers, adhesives, pesticides and fertilizers is provided. It also relates to a method of producing fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetic products, perfumes, foodstuffs, synthetic threads and fibers, synthetic leathers, adhesives, pesticides and fertilizers, including a step of depolymerizing lignin using the method according to the invention.

A method of depolymerizing lignin and to the use of this method in the production of fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetic products, perfumes, foodstuffs, synthetic threads and fibers, synthetic leathers, adhesives, pesticides and fertilizers is provided. It also relates to a method of producing fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetic products, perfumes, foodstuffs, synthetic threads and fibers, synthetic leathers, adhesives, pesticides and fertilizers, including a step of depolymerizing lignin using the method according to the invention.

A method of depolymerizing lignin and to the use of this method in the production of fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetic products, perfumes, foodstuffs, synthetic threads and fibers, synthetic leathers, adhesives, pesticides and fertilizers is provided. It also relates to a method of producing fuels, electronic components, plastic polymers, rubber, medicines, vitamins, cosmetic products, perfumes, foodstuffs, synthetic threads and fibers, synthetic leathers, adhesives, pesticides and fertilizers, including a step of depolymerizing lignin using the method according to the invention.