A kind of synthesis method of vanadium silver molybdenum phosphate catalyst and the method for catalytic preparation of prenyl alcohol and prenyl aldehyde

Abstract

The invention discloses a synthesis method of a vanadium silver molybdenum phosphate catalyst and a method for catalytically preparing prenyl alcohol and prenyl aldehyde. The catalyst is prepared according to (1) vanadium, silver, molybdenum, phosphorus, benzyl alcohol, and isobutanol put it into the reactor and stir evenly, react at 100-130°C for 8-10 hours, filter, and dry the filter cake at 150-200°C for 4-5 hours; The steam volume ratio accounts for 70-90%, the air volume ratio accounts for 10-30%, and the temperature is 400-450°C for 10 hours. Using 3-methyl-3-butenyl-1-alcohol as raw material under the vanadium-silver molybdophosphate catalyst to continuously produce prenol and prenal in the range of 350-450°C. The catalyst can be used continuously for more than half a year without changing the catalytic activity.

Description

technical field

[0001] A catalyst synthesis method and application for isomerization and oxidation of 3-methyl-3-butenyl-1-alcohol to prepare prenyl alcohol and prenyl aldehyde. Background technique

[0002] As a spice, citral is widely used in daily chemical and food industries. With the deepening of research, the application of citral in antibacterial agents, the application of citral is expanding, and the social demand is gradually increasing. Therefore, be badly in need of developing the citral synthetic technology of industrial requirements such as low cost, easy operation, high output.

[0003] Prenol and prenal are important raw materials for the artificial synthesis of citral, while 3-methyl-3-butenyl-1-ol is a raw material for synthesizing prenol and prenal. CN103360215A, CN105967978A, CN101544538 and other technologies all use 3-methyl-3-butenyl-1-alcohol as raw material to carry out intramolecular rearrangement to synthesize prenyl alcohol. CN103958451A uses pre...

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