32results about How to "Excellent resistance to ethanol" patented technology

The invention provides a method for improving yield of ethanol produced by sugar beet fermentation. Composite alcohol enzyme is coordinated with ultrasonic wave to treat a sugar beet raw material, so that cellulose and hemicellulose in the sugar beet raw material are decomposed to generate fermentable sugar; the colloid is decomposed, so that pipeline blockage is avoided; and the protein is decomposed into amino acid and dipeptide, so that a nitrogen source is provided for saccharomycetes, the load of amino acid anabolism of saccharomycetes cells is lightened, and more substrate is turned to fermentation for producing the ethanol. Pentose and hexose can be simultaneously utilized in the adopted mixed yeasts. The method solves the problems of low yield of the ethanol produced by sugar beet fermentation, high residual sugar of fermentation solution, long fermentation time and the like. By the method, the ethanol content of the fermentation solution is increased by 2.77 to 3.67 percent; and at the temperature of 20 DEG C, the ethanol volume concentration of the fermentation solution is 9.3 to 12.8 percent, the residual total sugar is 0.15 to 0.45 percent, and the ethanol yield of the raw material is 12.9 to 14.1 percent.

The invention discloses water-soluble triazinyl sulfuryl polyurethane. The triazinyl sulfuryl polyurethane is characterized in that a preparation method comprises adding vacuum-dehydrated bis(4-isothiocyanatophenyl) sulfone and polyethylene glycol 4000 into a three-neck flask with a stirring device; adding a high boiling point solvent; stirring and reacting for 2 to 3 hours in a nitrogen or inertgas atmosphere at 65 to 75 DEG C; then adding a catalyst; raising the temperature to 80 to 85 DEG C; performing stirring reaction for 8 to 10h; then adding 2-vinyl-4,6-diamino-1,3,5-triazine and a polymerization inhibitor, continuously stirring to react for 6-8 hours, cooling to room temperature after the reaction is finished, then precipitating in acetone, carrying out suction filtration, washinga product with dichloromethane for 3-5 times, and then carrying out rotary evaporation to remove dichloromethane to obtain the water-soluble triazinyl sulfonyl polyurethane. The invention further discloses preparation and application of the water-soluble triazinyl sulfuryl polyurethane in decorative coatings of wine bottles, perfume bottles, decorative lighting, home decoration glass products, glass instruments and the like.

The invention discloses a preparing method for persistent viscosity waterborne polyurethane dispersoid. The method includes the following steps of 1 synthesizing hard shell layer prepolymer, wherein a hyperbranched active polymer, isocyanate and a hydrophilic chain extender react to obtain the hyperbranched active prepolymer; 2, synthesizing a viscous core prepolymer, wherein macromolecule polyhydric alcohol, isocyanate and a hydrophilic chain extender react under the action of a catalyst to prepare the hyperbranched active prepolymer; 3, grafting the core-shell prepolymers, wherein the prepolymer prepared in the step 1 and the prepolymer prepared in the step 2 are mixed to react; 4, preparing the persistent viscosity dispersoid, wherein after deionized water is added, the prepolymer of the grafted network prepared in the step 3 is dispersed at a high speed to be emulsified, an appropriate amount of micromolecule amine is added according to needs to further conduct a chain extension reaction to obtain the product finally. The product prepared through the method has excellent initial viscosity, persistent viscosity, peeling strength, water tolerance and ethanol tolerance and is high in cohesion, and no adhesive residue exists after a matrix is peeled.