3results about How to "High product selectivity" patented technology

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The application relates to the technical field of organic synthesis, in particular to a preparation method of C9H 12 O. The method is to use phenol and isopropyl alcohol as reaction raw materials, then heat under a protective atmosphere, and make the mixed reaction liquid pass through the surface of a catalyst to complete the reaction and obtain C9H 12 O. In the process, when the catalyst is a phosphate catalyst, isopropyl phenol is mainly synthesized; when the catalyst is an Al-P-O catalyst, ortho-isopropyl phenol and para-isopropyl phenol are mainly synthesized. The reaction has low preparation cost, is not easy to produce harmful substances, is an environmentally-friendly reaction path, and realizes green environmental protection and low cost of C9H 12 O production.

The application discloses an NH2-COFS@ZnS photocatalytic material and a preparation method and application thereof. A multi-amino aromatic ligand and a multi-aldehyde aromatic ligand are combined into an NH2-COFS material through a Schiff base reaction, and the NH2-COFS material is combined with a zinc salt and a sulfur source through a hydrothermal reaction to obtain an NH2-COFS@Zn photocatalytic material. The NH2-COFS@ZnS photocatalytic material has excellent photocatalytic activity, good structural stability and reusability, can be applied to photocatalytic reduction of CO2, and has the advantages of simple preparation method, low cost and meeting industrial production.