3 results about "Sodium fluoride" patented technology

The present invention relates to a purple Chinese yam fruit juice preservation liquid which is prepared from tea polyphenols, citric acids, sodium fluoride and penicillin at mass ratios of 3 : 5 : 1 : 1. The application of the fruit juice preservation is as follows: 1) peeling, washing, and dicing purple Chinese yams, adding sugar and water, and boiling the mixture; 2) putting the cooked purple Chinese yams and sugar juice into a blender, squeezing, filtering, and removing residues; 3) adding pectin enzyme to conduct hydrolysis; 4) adding the preservation liquid; 5) conducting an ultra high-temperature sterilization and aseptic filling; and 6) pumping the air in a container, and filling with an inert gas, and thereby preserving and storing at room temperature. The preservation liquid can effectively conduct color retention and preservation for the purple Chinese yam juice, and the prepared preservation liquid is natural and non-toxic, and has no harm to human body health.

The invention discloses a preparation method of an Au-P/SiO2 catalyst. The preparation method comprises following steps: dissolving Tween 80 into a mixed solution composed of distilled water and 1-propanol, adding ethyl silicate, allowing the mixture to stand still for a night to form a colorless transparent solution, adding sodium fluoride, carrying out reactions for 51-53 hours at a temperatureof 24-26 DEG C under a rotation speed of 250 rpm, carrying out centrifugation, drying, and burning to obtain mesoporous silica; adding silica into a reaction bottle, evenly dispersing silica into distilled water by ultrasonic waves, then adding a HAuCl4 solution, adding NaH2PO2 under stirring, adjusting the pH to 9.4-9.6 by using ammonia water, carrying out reactions for 2 to 3 hours at a temperature of 65-75 DEG C, opening the glass stopper of the reaction bottle so as to volatize the ammonia water, keeping on performing reactions for 5.5 to 6.5 hours, and after reactions, performing suctionfiltering, washing, and drying to obtain the catalyst. The method is simple, convenient and quick, and the prepared Au-P/SiO2 catalyst has excellent catalytic activity and stability.