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A kind of catalyst and its method for preparing geraniol by hydrogenating citral

A catalyst, citral technology, applied in molecular sieve catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of complex process, poor selectivity, poor economic benefits, etc., to simplify the process operation process, reduce separation steps, save energy The effect of separation difficulty

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to develop a kind of geraniol that uses citral as raw material in view of many problems such as the inability to prepare high-purity geraniol from citral in one step in the existing production technology, and the selectivity is poor, the process is complicated, and the economic benefit is poor. , a method for preparing a single product geraniol by a one-step reaction

Method used

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  • A kind of catalyst and its method for preparing geraniol by hydrogenating citral
  • A kind of catalyst and its method for preparing geraniol by hydrogenating citral
  • A kind of catalyst and its method for preparing geraniol by hydrogenating citral

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Experimental program
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Effect test

Embodiment 1

[0042]Catalyst 1 and substrate citral were successively charged into a 500 ml hydrogenation reaction autoclave, and the input amount of catalyst 1 was 1.0 wt % of the substrate citral. Seal the autoclave, replace it with nitrogen and hydrogen for 3 times, fill with hydrogen to 2.0Mpa, start heating and stirring, control the reaction temperature to 50°C, the reaction time is 5h, and the hydrogen pressure is maintained at 3.0Mpa by supplementation. Sampling analysis, the results are shown in Table 1.

Embodiment 2

[0044] The catalyst 2 and the substrate citral were successively charged into a 500 ml hydrogenation reaction autoclave, and the input amount of the catalyst 2 was 1.0 wt % of the substrate citral. Seal the autoclave, replace it with nitrogen and hydrogen for 3 times, fill with hydrogen to 2.0Mpa, start heating and stirring, control the reaction temperature to 50°C, the reaction time is 5h, and the hydrogen pressure is maintained at 3.0Mpa by supplementation. Sampling analysis, the results are shown in Table 1.

Embodiment 3

[0046] The catalyst 3 and the substrate citral were successively charged into a 500 ml hydrogenation reaction autoclave, and the input amount of the catalyst 3 was 1.0 wt % of the substrate citral. Seal the autoclave, replace it with nitrogen and hydrogen for 3 times, fill with hydrogen to 2.0Mpa, start heating and stirring, control the reaction temperature to 50°C, the reaction time is 5h, and the hydrogen pressure is maintained at 3.0Mpa by supplementation. Sampling analysis, the results are shown in Table 1.

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Abstract

The invention discloses a catalyst and a method for preparing geraniol by hydrogenating citral. The novel catalyst adopted in the invention achieves the purpose of preparing high-purity geraniol by one-step hydrogenation of citral. The active center is prepared by being supported on a porous carrier, and the catalytic active center includes iodine, phosphorus, and also includes one or more of nickel, cobalt, and copper. It not only reduces the separation steps of citral, but also saves the difficulty of separation of products in the later stage, simplifies the technological operation flow, and the yield of geraniol reaches more than 98%.

Description

technical field [0001] The invention relates to the technical field of hydrogenated citral, in particular to a catalyst and a method for preparing geraniol by hydrogenating citral. Background technique [0002] Geraniol (chemical name trans-3,7-dimethyl-octadien-1-ol) is a precious spice with a mild, sweet rose scent and a bitter taste. It is widely used in flower-flavored daily-use flavors, fruit-flavored flavors such as apple and strawberry, cinnamon, ginger and other flavored food flavors, and can also be made into ester-based flavors. It can be used as medicine for antibacterial and insect repellent. [0003] Among citrals, neral and geranial can be easily interconverted, making it difficult to obtain a single component. [0004] [0005] In industrial production, it is a commonly used method to purify the substrate by rectification. , making the separation process very difficult, and there are few reports on highly purified certain components in citral. [0006] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J29/00C07C29/141C07C33/02
CPCB01J27/1853B01J29/00C07C29/141B01J2229/18C07C33/02
Inventor 李康于磊董菁张永振黎源王联防
Owner WANHUA CHEM GRP CO LTD