Catalyst and applications thereof in producing citronellal and/or citronellol by using citral

A catalyst, citronellal technology, applied in physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, chemical instruments and methods, etc., can solve problems such as complex procedures and high equipment investment, and achieve flexible operation , flexible switching, and high target product selectivity

Active Publication Date: 2019-04-19
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme not only requires two different catalysts, but also requires two sets of reactors, the process is complex and the investment in equipment is high.

Method used

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  • Catalyst and applications thereof in producing citronellal and/or citronellol by using citral
  • Catalyst and applications thereof in producing citronellal and/or citronellol by using citral
  • Catalyst and applications thereof in producing citronellal and/or citronellol by using citral

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] catalyst A 0 , the preparation process parameters of A-J are shown in Table 1:

[0050] Table 1

[0051]

[0052]

[0053] In Table 1: 1. "N" refers to the number of carbon atoms of the modified group in the compound with a modified group; 2. "Palladium / mol%" refers to the palladium element compound (calculated by the palladium element) in the The amount used in the preparation process accounts for the molar mass fraction of the carrier amount. The meanings of "ruthenium / mol%" and "rhodium / mol%" are similar to this, respectively referring to the amount of ruthenium element compound (calculated by ruthenium element) or rhodium element compound (calculated by rhodium element) in the preparation process The molar mass fraction of the carrier amount.

[0054] Taking the preparation of catalyst A as an example, the preparation steps of catalyst A are as follows:

[0055] 5.0g (9.0×10 -3 mol) phthalocyanine with 0.8g (4.5×10 -3 mol) mixed with palladium chloride, ...

Embodiment 1

[0064] A batch reactor was used, catalyst A and substrate citral were loaded, the hydrogen pressure was set to 2MPa, the reaction temperature was set to 50°C, and the illumination wavelength was adjusted to 630nm. was 97.3%, and the citronellol selectivity was 0.1%.

Embodiment 2

[0066] A batch reactor was used, catalyst B and substrate citral were loaded, the hydrogen pressure was set to 2MPa, the reaction temperature was set to 50°C, and the illumination wavelength was adjusted to 630nm. 98.3%, no citronellol is produced.

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PUM

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Abstract

The invention provides a catalyst and applications thereof in producing citronellal and / or citronellol by using citral. The catalyst can be used to catalyze the hydrogenation of citral to prepare citronellal and / or citronellol, and also can directionally prepare different target products with high selectivity by changing external conditions. A preparation method for the modified phthalocyanine catalyst includes the following steps: step 1) taking phthalocyanine and / or subphthalocyanine compounds as a carrier, performing heating reflux on the carrier and a metallic compound in the presence of asolvent, preferably performing reflux for more than 5 h, more preferably performing reflux for 5-10 h, and obtaining a catalyst I after filtering, washing and drying, wherein the metallic compound isa combination of one or more of palladium, ruthenium and rhodium metallic compounds, and preferably, the metallic compound is 0.2 mol% - 5.0 mol% of the molar weight of the carrier, preferably 0.5 mol% - 2.0 mol% according to the metal element contained therein.

Description

technical field [0001] The invention relates to a novel catalyst and its application in the field of hydrogenated citral. Background technique [0002] Citronellol naturally exists in many essential oils such as citronella oil, geranium oil, rose oil, etc. It has a fresh rose and geranium odor, and is widely used in perfume essence, soap and cosmetic essence formulations. , its dosage is as high as 50%. [0003] At the same time, citronellal is also an important flavor component. It is the precursor of many flavors and fragrances. For example, it can be used to synthesize hydroxycitronellal, menthol, citronellol and other flavors. It can also be widely used in beverages. , flavoring and preparation of candy, food, etc. [0004] In the prior art, there are two schemes for the production of citronellal and citronellol from citral. The first one is a one-step method, that is, citral directly generates citronellal or citronellol through one-step hydrogenation. This solution r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07C29/141C07C33/025C07C45/62C07C47/21
CPCB01J31/183C07C29/141C07C45/62C07C33/025C07C47/21
Inventor 于磊方文娟董菁张永振孙启魁王文
Owner WANHUA CHEM GRP CO LTD
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