Catalyst for synthesizing nonanal by high-selectivity catalytic oxidation of oleic acid

A catalytic oxidation, high-selectivity technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve high selectivity and yield, mild reaction conditions, easy separation effect

Active Publication Date: 2016-09-28
NANJING INST OF TECH
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the catalytic system of oxidizing nonanal from oleic acid with low conce

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] As shown in the examples, the present invention is a catalyst for the synthesis of nonanal by highly selective catalytic oxidation of oleic acid. The catalyst is a multi-metal mesoporous composite oxide with highly active transition metals, alkaline earth metals or rare earth metals as the catalytic oxidation activity Center, where transition metals include Cr, Mn, Fe, Co, Ni, Cu, alkaline earth metals include Mg, Ca, Sr, Ba, Al, and rare earth metals include La, Ce, Nd, Eu, Yb; a high choice of oleic acid The preparation method of the catalyst for catalytic oxidation synthesis of nonanal includes the following steps:

[0021] (1) Configure aqueous solutions of divalent and / or trivalent nitrates of alkaline earth metals, transition metals and / or rare earth metals as metal ion sources, and control the molar ratio of divalent metal cations to trivalent metal cations at 1.0-7.0; control The total concentration of cations is 0.2~1.5 mol / L; among them: transition metal nitrate ...

Embodiment 1

[0025] 7.0 Kg Mg(NO 3 ) 2 • 6H 2 O, 3.1 Kg Ba(NO 3 ) 2 , 3.3Kg Al(NO 3 ) 3 • 9H 2 O and 4.2 Kg Fe(NO 3 ) 3 • 9H 2 O is made into 200 L solution A with deionized water; 2.5 Kg (NH 4 ) 2 CO 3 Mix 200 L of solution B with deionized water, add the above two solutions A and B dropwise to the 1% CTAB aqueous solution at the same time, stir vigorously for 1 h with a magnetic stirrer, and use NH in the process 4 OH adjusts the pH of the mixed system to 9. After aging for 0.5 h, the obtained colloid is filtered under reduced pressure, washed, and dried at 100 ℃. The obtained solid sample is suspended in a 0.01ml / L ammonium iodide solution, using NH 4 The pH of the OH control system is 9, using 1% H 2 O 2 Create a weak oxidizing environment, filter out after vigorous stirring for 24 hours, wash, dry, and calcinate at 600 ℃ to obtain a high-temperature stable multi-metal mesoporous composite oxide catalyst.

Embodiment 2

[0027] 6.5 Kg Mg(NO 3 ) 2 • 6H 2 O, 2.5 Kg Sr(NO 3 ) 2 • 6H 2 O, 3.0Kg Al(NO 3 ) 3 • 9H 2 O and 4.0 Kg Cr(NO 3 ) 3 • 9H 2 O mix 200 L solution A with deionized water; add 2.3 Kg (NH 4 ) 2 CO 3 Mix 200 L of solution B with deionized water, add the above two solutions A and B dropwise to the 35% P123 aqueous solution at the same time, stir vigorously for 1 h with a magnetic stirrer, and use NH in the process 4 OH adjusted the pH of the mixed system to 10, and the obtained colloid was aged for 0.5 h, filtered under reduced pressure, washed, and dried at 100 ℃. The obtained solid sample was suspended in 0.5mo / L ammonium iodide solution, using NH 4 OH control system pH is 9, using 10% H 2 O 2 Create a weak oxidizing environment, filter out after 36 hours of vigorous stirring, wash, dry, and calcinate at 800 ℃ to obtain a high-temperature stable multi-metal mesoporous composite oxide catalyst.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a catalyst for synthesizing nonanal by high-selectivity catalytic oxidation of oleic acid. The catalyst is multi-metal mesoporous composite oxide and takes high-activity transition metal, alkaline earth metal or rare-earth metal as a catalytic oxidation active center, wherein the transition metal comprises Cr, Mn, Fe, Co, Ni and Cu; the alkaline earth metal comprises Mg, Ca, Sr, Ba and Al; the rare-earth metal comprises La, Ce, Nd, Eu and Yb. Compared with an existing catalyst, the catalyst has the following advantages that (1) the obtained catalyst still has a stable mesoporous structure under a relatively high temperature; (2) in a reaction process, an oleic acid conversion rate and the selectivity and yield of the nonanal are relatively high and reaction conditions are moderate; (3) any solvent and any additive are not added into a reaction system so that pollution to the environment is not caused and target products are easy to separate, so that the catalyst can be industrially produced in a large batch.

Description

Technical field [0001] The invention relates to a catalyst, in particular to a catalyst for synthesizing nonanal by highly selective catalytic oxidation of oleic acid and a preparation method. Background technique [0002] Nonanal, also known as decanal, is a colorless liquid with rose aroma. It is widely used in the preparation of artificial rose oil and essence, and can be used in food. It is also the main raw material for preparing plasticizers and surfactants. The method includes synthetic method and oxidative decomposition method. The synthetic method uses oleic acid or castor oil as raw materials to first generate undecylenic acid, and then react with molten alkali to obtain pelargonic acid, which is finally obtained by reduction reaction and oxidative decomposition The method is derived from oleic acid as raw material and decomposed by ozone oxidation. At present, it is mainly produced by nonanoic acid reduction or nonanol dehydrogenation, and the technology is backward, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J23/78B01J23/83B01J23/889B01J23/26
Inventor 王晓丽吴功德刘浩吕小笛
Owner NANJING INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap