3 results about "Aluminium phosphate" patented technology

The application discloses a method for preparing 1,3-propanediol by one-step hydration and hydrogenation of propenal with a modified molecular sieve as a catalyst. The Ni-SAPO-11 molecular sieve catalyst is prepared by an in-situ hydrothermal synthesis method, and the steps are as follows: firstly, phosphoric acid, an aluminum source, a nickel salt and a template 1 are fully mixed, and pre-crystallization is carried out to obtain a precursor gel; then, the precursor gel, a silicon source and a template 2 are fully mixed, and crystallization is carried out, and after filtration, washing, drying and calcination, a catalyst precursor is obtained; finally, after reduction treatment, the Ni-SAPO-11 molecular sieve catalyst is obtained. The prepared Ni-SAPO-11 catalyst has both acid centers and metal centers, can simultaneously catalyze the hydration reaction of propenal and the hydrogenation reaction of the hydration product 3-hydroxypropanal, is applied to the reaction of preparing 1,3-propanediol by one-step hydration and hydrogenation of propenal, has a simple flow process, low energy consumption, high 1,3-propanediol yield and a good industrial application prospect.

The invention discloses a method for preparing 3-hydroxypropionaldehyde by catalyzing acrolein hydration through a molecular sieve. The hierarchical pore structure SAPO-11 molecular sieve is prepared by adopting double template agents, and the method comprises the following steps: firstly, fully mixing phosphoric acid, an aluminum source and a template agent 1, and carrying out pre-crystallization to obtain precursor gel; and fully mixing the precursor gel, a silicon source and a template agent 2, crystallizing, washing, drying and roasting to obtain the SAPO-11 molecular sieve catalyst. The prepared catalyst shows high conversion rate and 3-hydroxypropionaldehyde selectivity in the acrolein hydration reaction, reaction conditions are mild, byproducts are few, stability is high, and the catalyst has good industrial application prospects.

The application belongs to the technical field of aluminum diethyl hypophosphite synthesis, and particularly relates to a preparation method and application of aluminum diethyl hypophosphite. The preparation method of the aluminum diethyl hypophosphite comprises the following steps: mixing soluble hypophosphite and a first solvent in a reactor to obtain a soluble hypophosphite solution; replacing air in the reactor with nitrogen and heating; introducing ethylene into the soluble hypophosphite solution to obtain a reaction solution; mixing an initiator, a catalyst and the reaction solution, reacting, obtaining a diethyl hypophosphite solution, adding a second solvent to obtain a diluted diethyl hypophosphite solution; adjusting the pH of the diluted diethyl hypophosphite solution to be acidic, adding an aluminum sulfate aqueous solution, and reacting to obtain the aluminum diethyl hypophosphite. The initiator comprises an oxidizing agent and a reducing agent. The application can reduce the reaction temperature to 22-50 DEG C, reduce energy consumption, improve the reaction efficiency, and obtain the aluminum diethyl hypophosphite with high purity and high yield.