7 results about "Ethyl levulinate" patented technology

The application relates to the technical field of edible essence. The application discloses a yogurt essence and a preparation method thereof. The raw material composition of the yogurt essence comprises ethyl maltol, vanillin, butanedione, acetic acid, ethyl acetate, propionic acid, 2,3-pentanedione, 3-hydroxy-2-butanone, butyric acid, ethyl butyrate, isoamyl acetate, methyl thio butyrate, hexanoic acid, ethyl hexanoate, 10% furanone, isoamyl butyrate, ethyl levulinate, linalool, p-cymene, 4-terpinenol, nerol, citral, geraniol, neryl acetate, geranyl acetate, D-limonene, lemon oil, distilled white lemon oil, sweet orange oil, glycerol triacetate, rosemary extract and bitter gourd extract. The yogurt essence prepared by the application has a flavor closer to real yogurt, good thermal stability and good flavor persistence.

The present invention relates to a composition comprising: (a) 0.0001 to 5 wt.-% of a lactam; (b) 1 to 80 wt.-% of a solvent selected from the group consisting of 2-methyltetrahydrofuran, ethyl levulinate and ethyl levulinate glycerol ketal (LGK); or mixtures thereof; to a non-therapeutic method of surface treatment to increase the resistance of said surface against bacterial soiling; and to the use of a solvent selected from the group consisting of 2-methyltetrahydrofuran, ethyl levulinate and ethyl levulinate glycerol ketal (LGK); or mixtures thereof to improve the solubility of a lactam.

The fragrance carrier composition comprises a levulinic acid-based solvent and a glycol-based solvent. The fragrance carrier composition is a non-ideal mixture. The fragrance delivery system includes a fragrance delivery device. The fragrance delivery device includes a reservoir, a porous medium, and a diffuser. At least a portion of a first end of the porous medium is disposed in the reservoir, and the opposite end of the porous medium is located near the diffuser. The reservoir contains the fragrance and the fragrance carrier composition. A method for diffusing the fragrance into the air includes diffusing the fragrance from a fragrance solution into the atmosphere surrounding the fragrance delivery system. The fragrance solution contains the fragrance and the fragrance carrier composition.

A method for preparing nickel-based porous carbon catalysts from waste plastics includes the following steps: dissolving nickel salts and waste plastics in an alcohol solution, stirring at room temperature, impregnating, drying in a drying oven, evaporating the alcohol solvent to obtain nickel-containing plastic solids; placing the obtained nickel-containing plastic solids in a tube furnace, heating to the corresponding plastic pyrolysis temperature under an inert atmosphere, and completing the plastic pyrolysis to obtain the catalyst. The method for preparing nickel-based porous carbon catalysts from waste plastics provided by this invention requires no other additives, catalysts, or high-pressure conditions. The preparation process is simple, environmentally friendly, uses readily available raw materials, has strong versatility, and is easy to implement in batches. This invention applies the obtained nickel-based porous carbon catalyst to the transfer hydrogenation of ethyl levulinate to prepare γ-valerolactone without the need for external hydrogen gas, and under suitable reaction conditions, the yield of γ-valerolactone exceeds 90%.

The invention provides a spice composition with fermented fruit juice fragrance, flower fragrance and radix aucklandiae as well as a preparation method and application of the spice composition. The perfume composition is prepared from the following components: 0.15 to 0.35 wt% of ethyl isovalerate, 0.15 to 0.35 wt% of phenethyl acetate, 0.15 to 0.35 wt% of ethyl butyrate, 0.3 to 0.5 wt% of propionic acid, 0.5 to 0.7 wt% of ethyl propionate, 1.5 to 3.0 wt% of nodular pomelo methane, 3.0 to 5.0 wt% of methyl anthranilate, 5.0 to 10.0 wt% of citrus essential oil, 0.2 to 0.4 wt% of ethyl levulinate, 1.0 to 2.0 wt% of ethyl maltol, 0.15 to 0.35 wt% of linfanglilian base, 10.0 to 15.0 wt% of methyl dihydrojasmonate, 10.0 to 15.0 wt% of musk T and 0.15 to 0.35 wt% of ombrox. And the balance of auxiliary spices and / or dispersants and / or stabilizers. The perfume composition realizes delicate construction of aroma levels and precise expression of olfactory images, can be used for daily chemical products and presents a complete aroma framework of front-adjusted fermented fruit juice aroma, middle-adjusted dried petal aroma and tail-adjusted quiet wood aroma.

The invention discloses a method for preparing ethyl levulinate through a microwave-assisted two-phase solvent system, and belongs to the technical field of ethyl levulinate preparation. The method comprises the following steps: putting a biomass raw material into a two-phase solvent system, and preparing ethyl levulinate by using a microwave-assisted catalyst, the catalyst is any one of Ti (SO4) 2 or a mixture of Ti (SO4) 2 and H2SO4; the solvent is a mixture of ethanol and gamma-valerolactone. Titanium sulfate is selected as a catalyst and is used for converting a biomass raw material solvent and successfully synthesizing ethyl levulinate. The esterification reaction path is not recorded in literatures so far, and the unique application potential of titanium sulfate in the field is shown.

The present invention relates to a heterogeneous ruthenium catalyst, which comprises elemental ruthenium supported on activated carbon carrier, where the catalyst has a total pore volume in the range of 0.3 to 0.6 ml / g, in particular in the range of 0.35 to 0.5 ml / g, and where pores having a pore diameter in the range of 10 to 200 nm contribute at least 50%, in particular at least 60%, especially at least 70%, to the total pore volume of the heterogeneous ruthenium catalyst. The present invention also relates to a process for the production of gamma-valerlactone, which comprises a hydrogenation of an levulinic acid or alkyl levulinate, such as methyl levulinate or ethyl levulinate, with hydrogen in the presence of a heterogeneous ruthenium catalyst, which comprises elemental ruthenium supported on activated carbon carrier, where the catalyst has a total pore volume in the range of 0.3 to 0.6 ml / g, and where pores having a pore diameter in the range of 10 to 200 nm contribute at least 50% to the total pore volume of the heterogeneous ruthenium catalyst.