2results about How to "Fewer post-processing steps" patented technology

The invention relates to a preparation method of soybean oil base polyhydric alcohol, in particular to a method for preparing soybean oil base polyhydric alcohol by directly using soybean oil. The soybean oil diluted by using a solvent reacts with hydrogen peroxide with the weight percentage being 30% for 2-5 hours at the temperature of 60-70 DEG C under catalysis of a catalyst with the weight percentage being 3-5%; vacuum distillation is conducted after the reaction is ended, and the solvent is evaporated; then low alcohol is added in a reactor to be subjected to a reaction for 4-6 hours under the pressure of 0.3-0.4 MPa and at the temperature of 70-80 DEG C, then the reaction is stopped, and the soybean oil base polyhydric alcohol is obtained. The method saves the using amount of hydrogen peroxide, reduces the post-treatment steps, and simplifies the production procedures, and accordingly the product cost is declined directly.

The invention discloses a method for preparing pure beta-phase molybdenum carbide particles through one-step carbonization and application of the pure beta-phase molybdenum carbide particles. The preparation method comprises the following steps: (1) preparing molybdenum oxide powder by adopting a method for thermally decomposing a molybdenum metal compound; (2) dividing an organic matter precursor and the molybdenum oxide powder obtained in the step (1) into two stacks, and respectively placing the two stacks on the ventilation side and the exhaust side of a tubular furnace; and (3) introducing carrier gas into the tubular furnace, and carbonizing the molybdenum oxide powder through a temperature programming process. According to the method, the carrier gas is utilized to deliver the gas-phase carbon source produced by thermal decomposition of the organic matter precursor to directly react with the solid-phase molybdenum oxide powder, the carbonization process can be efficiently achieved, high-purity beta-phase molybdenum carbide is obtained through one-step carbonization, high-value and high-risk hydrocarbon gas such as methane and propyl alcohol or alcohol steam is avoided, and the method is suitable for industrial production. The problems of carbon deposition on the surface of the molybdenum carbide caused by using the carrier gas as a carbon source and the like can be avoided, and the preparation method is simple, relatively mild in reaction condition, low in raw material cost, simple and easy to obtain and suitable for large-scale production, popularization and application.