5 results about "BUTYL LACTATE" patented technology

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The application discloses a water-soluble morpholine lactic amide acrylate bio-based monomer and a polymer thereof, and belongs to the technical field of bio-based polymers.The application uses a lactic acid derived green solvent (methyl lactate, ethyl lactate, propyl lactate, butyl lactate and the like) and morpholine to synthesize morpholine lactic amide ester (MML) through amine ester exchange under solvent-free mild conditions, then synthesizes a polymerizable morpholine lactic amide acrylate monomer (MMLA) through acylation reaction and tests the performance through various means.The research finds that the water-soluble bio-based monomer (MMLA) of the morpholine lactic amide acrylate developed by the application has lower toxicity than traditional acrylate monomers and can be polymerized in a more environmentally friendly system, and the water-soluble polymer obtained after polymerization has high glass transition temperature and good thermal stability, and the water-soluble polymer with lower biological toxicity and good stability has application prospects in the development of biomedical fields.

The invention discloses biodegradable gel and a method for removing paint on the surfaces of stone cultural relics, and relates to the technical field of stone cultural relic protection. The biodegradable gel comprises the following components in percentage by weight: 30-60% of a bio-based main solvent, 10-30% of a bio-based cosolvent, 5-15% of biogel, 1-10% of a thickening stabilizer and the balance of water, the bio-based main solvent is one or more of methyl lactate, ethyl lactate, propyl lactate and butyl lactate, the bio-based cosolvent is one or more of limonene, terpinene, methyltetrahydrofuran and gamma-valerolactone, and the bio-gum is one or more of xanthan gum, guar gum, carrageenan, locust bean gum and sesbania gum. The thickening stabilizer is one or more of bentonite, kaolin, attapulgite and diatomite. The degradable gel has the advantages of favorable swelling property, biodegradability, no toxicity, safety to the environment and operators, no strong acid substance and capability of preventing the surface of the stone cultural relic from being crisp when in use.

The invention belongs to the technical field of preparation of high-end high-purity wet electronic chemicals, and particularly relates to a preparation method and system of electronic-grade ethyl lactate. According to the method, food-grade ethyl lactate is taken as a raw material, ethyl pyruvate which is difficult to separate is reduced into ethyl lactate through reduction reaction, ethyl lactate homologues (methyl lactate, propyl lactate and butyl lactate) and light and heavy component impurities in the ethyl lactate are removed through vacuum distillation, and finally anions and cations in the ethyl lactate are removed through resin adsorption, so that the ethyl lactate is obtained. The content of the obtained ethyl lactate is higher than 99.99%, the anion content is smaller than or equal to 10 ppb, the metal ion content is smaller than or equal to 1 ppb, the acidity is smaller than or equal to 80 ppm, the moisture content is smaller than or equal to 100 ppm, and the requirements of electronic-grade ethyl lactate are met. The method can effectively remove ethyl pyruvate and ethyl lactate homologues which are difficult to remove in ethyl lactate, and has the advantages of low cost, low energy consumption, high production efficiency, environmental protection and the like.

A pest control composition comprising from about 1 wt% to about 10 wt% sodium lauryl sulfate; from about 0.01% to about 10% by weight of a C6-C22 fatty acid or a salt thereof; from about 0.01% to about 15% by weight of an active ingredient, the active ingredient is selected from the group consisting of corn mint oil, peppermint oil, spearmint oil, rosemary oil, thyme oil, citionella oil, clove oil, cinnamon oil, cedar oil, garlic oil, pelargonium oil, lemon grass oil, geraniol, eugenol, nerol, vanillin, 2-phenethyl propionate, menthol, menthone, thymol, carvone, camphor and methyl salicylate; the component A is prepared from p-isopropyltoluene, linalool, cineole / 1, 8-cineole, alpha-pinene, bornyl acetate, gamma-terpinene and a mixture of the p-isopropyltoluene, the linalool and the cineole / 1, 8-cineole; from about 0.1% to about 45% by weight of a solvent selected from the group consisting of isopropanol, triethyl citrate, isopropyl myristate, propylene carbonate, ethyl lactate, butyl lactate, butyl stearate, glycerol, and mixtures thereof; and from about 60% to about 95% by weight of water.