42 results about "Propyl formate" patented technology

The invention relates to a drug-loading method for a drug-eluting balloon catheter, which comprises the following steps: ① Swelling the balloon first, and the swelling treatment time is 0.5h-3h; Spray the mixture of solvent and solvent on the surface of the swollen balloon, and let it dry naturally for 10-30 minutes. The weight-number ratio of solvent, therapeutic drug and additive in the mixed liquid is 10-90:0.5-30:5-60. Step ① The solution used for swelling the balloon is methyl formate, ethyl acetate, ethyl formate, methyl acetate, propyl formate, methyl propionate, ethyl propionate, phenyl acetate, octyl acrylate and any one of methyl benzoate, or a mixture of two or more of them. The drug-loading method of the drug-eluting balloon catheter of the invention can make the drug coating uniform and firm, and the drug release is rapid and stable.

The invention relates to the technical field of synthesis of pharmaceutical intermediates, in particular to a preparation method of o-fluorobenzaldehyde, comprising the following steps: dissolving propyl formate in anhydrous tetrahydrofuran to obtain solution A; dissolving o-fluorobromobenzene in anhydrous tetrahydrofuran , to obtain solution B; put anhydrous lithium chloride and magnesium into the reaction flask, add anhydrous tetrahydrofuran, heat to slightly boil, drop dibromoethane to initiate the reaction; under reflux, add solution B to the reaction flask; feeding is complete , lower the temperature, and then add solution A dropwise; after feeding, continue the reaction for a period of time; lower the temperature, quench with dilute hydrochloric acid, post-process, and refine by vacuum distillation to obtain o-fluorobenzaldehyde. The method of the present invention forms stable and less active benzylmagnesium lithium chloride by adding lithium chloride when preparing the Grignard reagent; the reaction of propyl formate with it is controllable, and only reacts with a less active benzylmagnesium lithium chloride, so that The reaction stays at the aldehyde stage instead of going further to the alcohol stage.

The invention belongs to the technical field of lithium batteries, and specifically relates to a method for preparing a lithium battery. The electrolyte of the lithium battery includes lithium salts, organic solvents, organic free radicals and additives; the organic solvent includes the following mass fraction raw materials: : 20-22 parts of ethyl formate, 10-12 parts of propyl formate, 18-20 parts of methyl acetate, 30-35 parts of propyl acetate and 11-22 parts of ethylene carbonate; the lithium salt is lithium tetrafluoroborate ; The additive comprises the following mass fraction raw materials: 30-40 parts of vinylene carbonate, 20-35 parts of fluoroethylene carbonate and 20-25 parts of cyclohexene; the ring-shaped battery includes a ring-shaped barrel, a sealing cover and a negative electrode column; the negative pole column is fixed in the middle of the annular barrel through insulating rubber; the positive electrode ring is fixed in the annular barrel; the positive electrode ring is fixed in the annular barrel through insulating rubber, and the positive electrode ring is the positive pole; the negative pole is the negative pole of the annular battery; a diaphragm is arranged inside the positive pole ring.

The invention provides a toothpaste containing various plant extracts, which is composed of cistanche extract, reed root extract, hop extract, apocynum extract, sorbitol, liquid flavor, methylparaben, paraben Propyl formate, polyethylene glycol-400, xanthan gum, titanium dioxide, silicon dioxide, sodium lauryl sulfate, and water, and a preparation method is also provided, adding cistanche extract, hops extract, and Robbie to water Hemp extract, add xanthan gum and stir after heating, add polyethylene glycol-400 and sorbitol and stir, add titanium dioxide, silicon dioxide, sodium lauryl sulfate and reed root extract and stir in vacuum, add methyl hydroxybenzoate The liquid essence solution of ester and propyl p-hydroxybenzoate is stirred in vacuum to obtain toothpaste containing various plant extracts. Compared with the currently used chemical fungicides with potential safety concerns, the natural plant extract used in the present invention has the active ingredient of a plant-derived natural product, which is safe to use, has no side effects and has obvious effects.