55results about How to "Low iodine value" patented technology

The invention discloses a method for preparing rice bran active substances octacosanol and triacontanol, which belongs to the comprehensive utilization of rice bran, especially the comprehensive utilization of rice bran wax. The present invention uses crude bran wax as a raw material, and after refining the crude bran wax, adopts ultrasonic hydrolysis of rice bran wax, extraction of fatty alcohol, and separation of octacosanol and triacontanol by molecular distillation technology, a product with a purity greater than 80% is prepared. . The invention uses ultrasonic hydrolysis of rice bran wax and molecular distillation technology to separate octacosanol and triacontanol, which belongs to pioneering research, and establishes a complete set of technology for extracting octacosanol and triacontanol from rice bran wax. The hydrolysis reaction is shortened by more than 10 hours compared with the general method, shortened from 12-16 hours to less than 1 hour, and the hydrolysis rate has been increased by 2 times; the pilot test of molecular distillation has been carried out, and the preparation of high-purity biologically active substances octacosanol, Triacontanol breakthrough. The product has high purity, low iodine value, and heavy metal and microbial content meet the requirements of food additives, creating conditions for the development and utilization of high-carbon alcohols in the future.

The invention relates to a method for producing water-white hydrogenated rosin, which comprises the following steps: using light color refined rosin obtained after purifying the rosin as hydrogenation raw materials, using a solvent for preparing solution, carrying out catalytic hydrogenation, then, separating out the solvent through distillation, and obtaining the water-white hydrogenated rosin. When the method provided by the invention is adopted, the water-white hydrogenated rosin with light color (the Lovibond color number of the yellow color is 0.3 to 1.0, and the Lovibond color number of the red color is 0.2 to 0.3), low iodine value and low abietic acid content can be obtained. Compared with the water-white hydrogenated rosin produced by a traditional method, the water-white hydrogenated rosin produced by the method provided by the invention has the advantages of lighter color, higher hydrogenation degree, better stability and lower cost, and the application value of products can be improved when the water-white hydrogenated rosin is applied to aspects such as electronics, paint, bonding agents, dyestuff and the like.

The invention is directed to liquid vegetable unsaturated alcohol mixture having an iodine value of 88 to 100 and a cloud point less than 7° C., the unsaturated alcohol mixture being prepared by reduction of a vegetable unsaturated fatty acid mixture and / or an alkyl ester thereof in the presence of a zinc-type catalyst having a copper content of 30 ppm or less, the vegetable unsaturated fatty acid mixture being prepared from at least one vegetable oil selected from the group consisting of palm oil, coconut oil and palm kernel oil. The invention also concerns a liquid vegetable unsaturated alcohol mixture having an iodine value of 88 to 100, a cloud point less than 7° C. or lower and a conjugated diene content of 1 wt. % or less.

The invention discloses a preparation method of an oil hydrogenation nano-catalyst for improving catalytic activity and belongs to the technical field of nano-catalysts. The preparation method of the oil hydrogenation nano-catalyst disclosed by the invention comprises the following steps: taking nano calcium carbonate as a carrier, enabling an alkaline precipitant to react with a metal salt of a catalytic activity component, and supporting the catalytic activity component onto a carrier. Moreover, a surfactant is added in the preparation process, and an adsorption behavior of reactive metals is influenced due to competitive adsorption between the surfactant and the activated metal ions during a precipitation reaction. Meanwhile, due to the wetting and spreading characteristics of the surfactant, the wetting and penetrating properties of the activated metal salt solution on the carrier are promoted, and the dispersion property of the catalytic activity component on the carrier is excellent, so that the activity of the prepared catalyst is improved.