75results about How to "Raw materials are renewable" patented technology

The invention relates to a method for preparing furyl glycol from fructose and fructosyl biomass, and specifically relates to a method for converting fructose and fructosyl biomass into 2,5-dihydroxy methyl tetrahydrofuran or 2,5- dihydroxy methyl furan through continuous dehydration and hydrogenation reaction in the presence of a catalyst under a proper temperature and pressure based on a mixed solvent ion liquid / water as a reaction medium. The method disclosed by the invention takes the biomass rich in fructose as the material to prepare a target product through a one-pot process, is coupled with multi-step reaction, simple in reaction step, cheap and reproducible in material, convenient to operate, and high in product yield; the invention provides a novel method for directly preparing chemicals from biomass.

The invention relates to a method for preparing a carbon fiber precursor lignin / polylactic acid fiber. The method comprises the following steps: carrying out intermittent heat treatment on purified lignin powder and polylactic acid slices in a vacuum drying oven; mixing the lignin powder subjected to heat treatment with the polylactic acid slices; pelleting at 160-250 DEG C through double screw rods to obtain lignin / polylactic acid composite master batches; and spinning the dried lignin / polylactic acid composite master batches at 190-250 DEG C through a melt-spinning machine, so as to obtain the carbon fiber precursor lignin / polylactic acid fiber. The carbon fiber precursor lignin / polylactic acid fiber provided by the invention has the advantages of renewable raw materials, excellent fiber quality, small diameter of obtained fiber, high strength and low cost; continuous production can be carried out; the carbon fiber precursor lignin / polylactic acid fiber is expected to be applied to the fields such as automobiles, high-speed rails, buildings and sports goods as a reinforcing material after being carbonized; and the market prospect is wide.

A thermosetting bamboo sand composite pressure pipe comprises a inner liner layer (1), an inner reinforcement layer (2), a sand adhesive layer (3), an outer reinforcement layer (4) and an outer protection layer (5) arranged respectively from an inside to an outside in a radial direction thereof. The inner reinforcement layer (2) formed by winding bamboo, a thickening layer (3) formed by stirred ore and adhesive, and the outer reinforcement layer (4) formed by winding bamboo are arranged sequentially from an inside to an outside between the inner liner layer (1) and the outer protection layer (5). The composite pressure pipe is energy-saving and environmental-friendly, raw production materials are recyclable, and a price is low.

The invention discloses epoxy-terminated waterborne polyurethane resin and a preparation method thereof. The resin is prepared in the following steps that vegetable oil polyhydric alcohols, small molecular polyhydric alcohols, diisocyanate and a hydrophilic chain-extending agent are contained in organic solvent, and an isocyanate-terminated polyurethane prepolymer is obtained through an addition reaction under the action of a catalyst; a hydroxyl-terminated epoxy compound is added for reacting, and epoxy-terminated polyurethane is obtained; then amine is added for neutralizing, water is dripped for conducting phase reversal, heat preservation is performed, the organic solvent is removed through reduced pressure distillation, and accordingly the epoxy-terminated waterborne polyurethane resin is obtained. The resin is water-based paint, no volatile organic pollutants exist, and environmental friendliness is achieved. The epoxy-terminated waterborne polyurethane resin is prepared from combining the polyurethane and the epoxy resin through a chemical method, and the resin not only has the flexibility of the polyurethane but also has the advantages of rigidity and cohesiveness of the epoxy resin. The vegetable oil polyhydric alcohols are adopted as the raw materials, and the method has advantages of being low in price, environmentally friendly, capable of regenerating raw materials and the like compared with a traditional mode that a petrochemical engineering dihydric alcohol product is used as the raw material.

The invention discloses a green environment-friendly soluble stamping and drawing oil and a preparation method thereof. The preparation method comprises the following steps: with sulfonic acid ionic liquid as a catalyst and waste grease, non-edible vegetable oil or fatty acid methyl ester / fatty acid ethyl ester as a raw material, adding hydrogen peroxide and carrying out heating and stirring for a reaction so as to prepare epoxidized modified grease, wherein the molar ratio of the raw material to hydrogen peroxide is 1: 1 to 1: 5; with trimethylol propane and fatty acid or fatty acid methyl ester / fatty acid ethyl ester as raw materials and sulfonic acid ionic liquid as a catalyst, carrying out heating and stirring for a reaction so as to prepare hydroxyalkylated fatty acid ester, wherein the molar ratio of trimethylol propane to fatty acid or fatty acid methyl ester and fatty acid ethyl ester is 1: 1.5 to 1: 5, and the molar ratio of trimethylol propane to ionic liquid is 1: 0.001 to 1: 0.2; uniformly mixing epoxidized modified grease, hydroxyalkylated fatty acid ester and an extreme pressure agent under stirring to obtain the mixture component A; uniformly mixing a surfactant and an osmotic agent at a normal temperature and a normal pressure under stirring so as to obtain the mixture component B; and adding the component A, the component B, an antirust agent and other additives into a reaction kettle and carrying out stirring at a temperature of 40 to 80 DEG C for 10 min to 1 h so as to obtain a final product.

The invention relates to a preparation method for tung oil polyhydric alcohol with high hydroxyl value. The method comprises the following steps: (1) mixing tung oil, carboxylic acid, an acid catalyst, a hydroxylation reagent and deionized water, heating to 35-45 DEG C, dropwise adding a hydrogen peroxide solution while stirring while maintaining the temperature at 40-65 DEG C, and maintaining the reaction temperature for 2-8h after the ending of the dropwise adding, standing for layering after the ending of the reaction, and separating a water phase, thereby acquiring an oil phase; (2) mixing the oil phase with hydroxy-containing amine agents, adding ethyl alcohol and an inorganic acid catalyst, heating to 30-40 DEG C under nitrogen protection, dropwise adding an aldehyde agent while stirring, heating to 50-90 DEG C while violently stirring and continuously reacting for 1-5h after the ending of the dropwise adding, standing for layering after the ending of the reaction, neutralizing the oil phase, washing with water and performing reduced pressure distillation, thereby acquiring the tung oil polyhydric alcohol with high hydroxyl value. According to the invention, the hydroxylation agent is added in the epoxidation process, so that a cross-linking side reaction can be effectively avoided, a tung oil conjugated triene bond after loop opening is replaced, the cross-linking can be effectively avoided in the amine methylation process and the tung oil polyhydric alcohol with high hydroxyl value is acquired.