53 results about "Angelica lactone" patented technology

The invention discloses cellulose levulinate and a method for preparing mixed ester with the same. Hybrid reaction is carried out on celluloses, organic alkali and organic solvents to obtain cellulosesolution; levulinic acid base ester or angelica lactone is added into the cellulose solution, and reaction is carried out to obtain cellulose levulinate solution; anti-solvents are added into the cellulose levulinate solution, and then filtering, washing purification and drying are carried out to obtain the cellulose levulinate. The method includes dissolving the cellulose levulinate; adding acylation reagents; then adding C1-C4 low fatty alcohol, ethyl acetate or water; carrying out filtering, purification and drying to obtain the cellulose levulinic acid mixed ester. The cellulose levulinate and the method have the advantages that levulinic acid functional areas with active carboxyl are constructed on cellulose molecular chains in an in-situ manner, cellulose derivatives with novel structures, adjustable properties and levulinic acid structures are prepared, accordingly, the celluloses can be structurally specifically derived, and the cellulose levulinate and the method have important significance in high-valued utilization of the celluloses.

The invention discloses an additive for enhancing fragrance of tobacco stem shreds. The additive consists of the following components in percentage by mass: 1 to 5 percent of ethyl berry ketones, 0.1 to 2 percent of ethyl maltol, 1 to 5 percent of alpha-angelica lactone, 0.1 to 2.5 percent of pyromeconic acid lactone, 20 to 50 percent of propylene glycol, 30 to 45 percent of distilled water and 5to 15 percent of edible ethanol. By adoption of the additive, inferior peculiar smell of tobacco stem shreds can be avoided, and the tobacco stem shreds and leaves are endowed with good quality and fragrance.

A non-aqueous electrolyte battery with improved cyclic characteristics and battery capacity at high temperature and capable of suppressing the evolution of gas during storage at high temperature while maintaining favorable cyclic performance, wherein vinylene carbonate (VC) and alpha-angelica lactone (4-hydroxy-3-pentenic acid gamma-lactone) are contained in the electrolyte, and whereby a highly soft and flexible coating film with alpha-angelica lactone is formed on the surface of the negative electrode without reducing the initial charging efficiency of the battery. Since a mixed coating film comprising VC and alpha-angelica lactone is formed on the soft and flexible coating film and the mixed coating film has higher thermal stability at high temperature than that of the coating film formed only with VC, the cyclic characteristics of the battery at high temperature can be improved while enhancing the suppression of gas evolution during storage at high temperature.

The invention relates to a catalyst for preparing gamma-valerolactone by alpha-angelica lactone, which is characterized by comprising the following components by weight percent calculated by oxide: 0.5-15% of active component, 0.05-20% of catalyst accelerator and the balance of carrier. The invention has the advantages of low cost, simple process, easy operation, high product yield and good safety in the production process.

The invention relates to the field of drugs, and in particular to an anti-oral ulcer drug and application thereof. The anti-oral ulcer drug is prepared from coniferyl ferulate or coniferyl ferulate and Alpha-angelica lactone as active components. The anti-oral ulcer drug is a locally delivered drug, such as gel, paste and collutory. Coniferyl ferulate which is locally delivered has the effect of promoting the healing of oral ulcers; and when coniferyl ferulate is used along with Alpha-angelica lactone, the effect of promoting the healing of oral ulcers is better.

The invention relates to a catalyst for preparing gamma-valerolactone by alpha-angelica lactone, which is characterized by comprising the following components by weight percent calculated by oxide: 0.5-15% of active component, 0.05-20% of catalyst accelerator and the balance of carrier. The invention has the advantages of low cost, simple process, easy operation, high product yield and good safety in the production process.

The invention discloses a preparation method of aviation kerosene or diesel oil, and relates to a new path for compounding liquid-state chain hydrocarbon fuel based on a raw material of lignocelluloses platform chemical compound. The preparation method is divided into three parts: (1) preparing 4,4-bis(5-methyl furan-2-furyl) pentanoic acid from a dehydrated product-angelica lactone of levulinic acid in an acid catalyst and 2-methyl furan through an acid catalytic alkylation reaction; (2) hydrogenating the 4,4-bis(5-methyl-2-furyl) pentanoic acid, effectively removing C-C double bonds and C-H double bonds in the 4,4-bis(5-methyl-2-furyl) pentanoic acid, and preparing a saturated organic compound containing oxygen; (3) carrying out hydrodeoxygenation on a hydrogenated alkylate by adopting a metal-carbon catalyst, thus obtaining biomass aviation kerosene or high-quality diesel oil of which the carbon chain length is 8 to 15.

The invention relates to a recombinant maple essence based on fragrance threshold, characterized in that the recombinant maple essence is composed of fragrance components, sugars and solvents, wherein the recombinant maple essence is calculated as 100%, and each component in the fragrance components Including methylcyclopentenolone, 2-acetylfuran, 5-hydroxymethylfurfural, furfural, acetylpyrrole, 2.6-dimethylpyrazine, β-damascenone, linalool, trigonelactone, α-angelica lactone, benzyl benzoate, vanillin, nonanoic acid, citric acid, fumaric acid; the weight ratio of each component in the sugar is: sucrose 0-1%, fructose 2-2.6%, Glucose 10-16%, maltose 20-32%; the balance is solvent. The recombinant maple flavor is applied to cigarettes, which can significantly increase the aroma and smoke concentration of cigarettes, enhance the aroma quality, and improve comfort, and has no negative effects such as burnt bitterness, sweetness and greasy feeling.

The invention relates to the technical field of traditional Chinese medicines. The invention discloses the application of baccarpa dahurica lactone in protecting kidney damage cells, thereby providing an additional safe and effective medication option for clinically preventing kidney damage. Baccarpa dahurica lactone can effectively protect kidney damage cells in a safe dose, and can be further developed as a kidney damage protection drug, which has broad application prospects.

The invention relates to a method for preparing biological gasoline from biomass, which comprises the following steps: biomass hydrolysis: hydrolyzing biomass in 0.1-10% dilute acid at 140-220 DEG C for 5-240 minutes to prepare levulinic acid; carrying out dehydration reaction on the levulinic acid at 130-180 DEG C for 60-180 minutes under the action of 0.1-5% liquid acid, acidic ionic liquid or molecular sieve to prepare angelica lactone; carrying out polymerization reaction on the angelica lactone at 60-160 DEG C for 1-180 minutes under the action of 0.1-5% inorganic alkali to prepare an angelica lactone polymer; and carrying out hydrogenation reaction on the angelica lactone polymer at 200-400 DEG C for 4-60 hours under the action of a 0.1-5% catalyst to obtain the final product biological gasoline. The method can greatly enhance the carbon utilization ratio, reduce the carbon dioxide emission, and lower the dependence on petroleum and other nonrenewable resources. The method has the advantages of short technical process and mild reaction conditions; and the product has the advantages of high yield and high quality.

A levulinic acid composition A having: a. at least 95 wt. % of levulinic acid; b. between 5 wppm and 5000 wppm of formic acid; and c. less than 1000 wppm of angelica lactone, based on the total weight of the composition. A process for the isolation of a levulinic acid composition, having the following steps: a. performing acid catalyzed hydrolysis of a C6 carbohydrate-containing feedstock to obtain reaction product X, b. subjecting of reaction product X to solid-liquid separation to provide a composition 1, c. feeding composition 1 to at least two purification steps to treat composition 1 to obtain a levulinic acid composition, wherein a second or a further purification step is a melt crystallization step.

The invention provides a method for synthesizing alpha-amino-gamma-carbonyl pimelic ester compounds. The method comprises the following steps: taking alpha-angelica lactone and an N-aryl glycine derivative as raw materials, taking cheap metal salt as a catalyst and protonic acid as an additive in an organic solvent, and performing normal temperature in air to form the pimelic ester compounds. Themethod is low in prices of reaction reagents, simple in reaction steps, easy to operate, low in production cost and small in environment pollution; the reaction time is short, aftertreatment is simpleand convenient, the yield is high, the purity is good, and the method is applicable to industrial production.

The invention discloses a method for quantitatively analyzing lactones aromatic substances in mainstream smoke of fine cigarettes. The method is used for determining the content of three types of main lactones aromatic substances including alpha-angelica lactone, gamma-caprolactone and dihydroactinidiolide in the mainstream smoke of the fine cigarettes based on a gas chromatography-tandem mass spectrometer, and comprises the steps of preparing an internal standard solution, a standard working solution and a sample solution, analyzing by the gas chromatography-tandem mass spectrometer, and calculating a determined result and the like. The optimized detection method disclosed by the invention is relatively simple and convenient, and sensitive to respond and can be used for accurately quantitatively analyzing; matrix interferences are effectively avoided, and the linear correlation is relatively good; the detection limits of the three types of main lactones aromatic substances including the alpha-angelica lactone, the gamma-caprolactone and the dihydroactinidiolide are 4.23ng / piece, 1.86ng / piece and 1.87ng / piece respectively, the repetitive rates are 1.31%, 3.57% and 1.93% respectively, and the standard recovery rates are 108.3%, 115.4% and 89.4% respectively. The method disclosed by the invention has high sensitivity and relatively good repeatability and recovery rate, and is applicable to quantitative analysis of trace target matters in complicated matrixes of the smoke of the fine cigarettes.