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Synthetic method of vanadium-silver-molybdenum phosphate catalyst and method to catalytically prepare prenol and 3-methyl-2-butenal

A synthesis method and catalyst technology, which is applied in the synthesis of vanadium silver molybdenum phosphate catalyst and the catalytic preparation of prenyl alcohol and prenyl aldehyde, which can solve the problems of large equipment investment and the like

Active Publication Date: 2018-08-17
CHINA CATALYST HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large investment in equipment

Method used

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  • Synthetic method of vanadium-silver-molybdenum phosphate catalyst and method to catalytically prepare prenol and 3-methyl-2-butenal
  • Synthetic method of vanadium-silver-molybdenum phosphate catalyst and method to catalytically prepare prenol and 3-methyl-2-butenal
  • Synthetic method of vanadium-silver-molybdenum phosphate catalyst and method to catalytically prepare prenol and 3-methyl-2-butenal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A catalyst activator for synthesizing prenol and prenaldehyde, the activator is an activator with an electric heating device 12 to control the catalyst activation temperature, and the electric heating device 12 is evenly arranged on the periphery of the activator , the upper part of the activator is a cremation furnace 11, the lower part is a gas distributor 13, the top of the activator is provided with an emptying device 16, and the bottom of the gas distributor 13 is respectively connected to an air feed pipeline and a water vapor inlet pipeline , the water vapor feed pipeline is provided with a water vapor flowmeter 15, and the air intake pipeline is provided with an air flowmeter a14; on the cremation furnace at the top of the activator, according to the order from top to bottom, from left to right, respectively There are 3 temperature measuring points 17 .

[0018] 148 grams of isobutanol, 216 grams of benzyl alcohol, 45 grams of vanadium pentoxide, 0.75 grams of s...

Embodiment 2

[0020] A catalyst activator for synthesizing prenol and prenaldehyde, the activator is an activator with an electric heating device 12 to control the catalyst activation temperature, and the electric heating device 12 is evenly arranged on the periphery of the activator , the upper part of the activator is a cremation furnace 11, the lower part is a gas distributor 13, the top of the activator is provided with an emptying device 16, and the bottom of the gas distributor 13 is respectively connected to an air feed pipeline and a water vapor inlet pipeline , the water vapor feed pipeline is provided with a water vapor flowmeter 15, and the air intake pipeline is provided with an air flowmeter a14; on the cremation furnace at the top of the activator, according to the order from top to bottom, from left to right, respectively There are 3 temperature measuring points 17 .

[0021] 148 grams of isobutanol, 216 grams of benzyl alcohol, 50 grams of vanadium pentoxide, 0.5 grams of si...

Embodiment 3

[0023] In reactor 3, add No. 50 grams of catalyst No. 1, when the temperature rises, when the reactor is at ~ 400 DEG C, evenly inject 25 grams of 3-methyl-3-butenyl-1-alcohol per hour with raw material metering pump 5 (content 99%, the content used in the following examples is the same), 25 grams of the product are obtained per hour in the product receiving tank 2, and the product isopentenol content is 98.9% after analysis, and the 3-methyl-3-butenyl-1-alcohol content is 0.1 %. When the feed rate per hour mentions 30 grams, 30 grams of products are obtained per hour, and the product analysis shows that the prenol content is 94.3%, and the 3-methyl-3-butenyl-1-alcohol content is 4.8%. When the feed rate increased to 50 grams per hour, 50 grams of product was obtained per hour, and the product analysis showed that the prenol content was 75.6%, and the 3-methyl-3-butenyl-1-ol content was 23.4%.

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Abstract

The invention discloses a synthetic method of vanadium-silver-molybdenum phosphate catalyst and a method to catalytically prepare prenol and 3-methyl-2-butenal. The catalyst is prepared by: (1) addingvanadium, silver, molybdenum, phosphorus, benzyl alcohol and isobutanol according to certain molar ratios into a reactor, stirring well, allowing reaction at 100-130 DEG C for 8-10 hours, filtering,and drying filter cake at 150-200 DEG C for 4-5 hours; tableting the solid with a press machine, and activating for 10 hours under the conditions of vapor volume ratio of 70-90%, air volume ratio of 10-30% and temperature of 400-450 DEG C. prenol and 3-methyl-2-butenal are continuously produced at the temperature of 350-450 DEG C from 3-methyl-3-butenyl-ol under the vanadium-silver-molybdenum phosphate catalyst. The vanadium-silver-molybdenum phosphate catalyst is suitable for continuous use for longer than half a year and has unchanged 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/199C07C29/56C07C33/03C07C45/38C07C47/21
CPCB01J27/199C07C29/56C07C45/38C07C33/03C07C47/21
Inventor 李进郑学胜王庆吉王建青
Owner CHINA CATALYST HLDG CO LTD
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