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Catalyst for preparing beta-ionone, preparation method of catalyst and method for preparing beta-ionone by catalyst

An ionone and catalyst technology, which is applied in the field of catalysts for preparing beta-ionone, can solve the problems of high equipment requirements, harsh operating conditions, and difficult separation, and achieve the effects of reducing the difficulty of separation, reducing the difficulty of production, and reducing conditions.

Active Publication Date: 2018-05-15
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a method suitable for preparing β-ionone by hydroisomerization in view of the shortcomings of high equipment requirements, harsh operating conditions, and difficult follow-up separation in the prior art for preparing β-ionone. Catalyst and its preparation method

Method used

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  • Catalyst for preparing beta-ionone, preparation method of catalyst and method for preparing beta-ionone by catalyst
  • Catalyst for preparing beta-ionone, preparation method of catalyst and method for preparing beta-ionone by catalyst

Examples

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Effect test

Embodiment 1

[0038] Weigh PdCl 2 Solid 8 g and SmCl 3 1.3 grams of solid, dissolved in 200 grams of 0.5wt% hydrochloric acid aqueous solution, added 200 grams of carrier γ-Al 2 o 3 Immerse for 5 hours, then dry at 90°C for 24 hours, then bake at 400°C for 8 hours, then reduce with pure hydrogen at 100°C for 12 hours, and then impregnate in 210 grams of K with a concentration of 0.3wt%. 2 SO 4 In the solution for 5 hours, then dried at 90°C for 24 hours, then calcined at 400°C for 6 hours, and then reduced with pure hydrogen at 100°C for 12 hours to obtain Pd-Sm-S-K / γ-Al 2 o 3 Catalyst C1. The composition of the catalyst and the physical property data obtained by nitrogen physical adsorption are shown in Table 1.

Embodiment 2

[0040] Weigh PdCl 2 Solid 26.5 g and SmCl 3 12.5 grams of solid, dissolved in 250 grams of 3.5wt% hydrochloric acid aqueous solution, added 200 grams of carrier γ-Al 2 o 3 Immerse for 10 hours, then dry at 105°C for 15 hours, then bake at 700°C for 5 hours, then reduce with pure hydrogen at 350°C for 9 hours, and then soak in 170 grams of K with a concentration of 3wt%. 2 SO 4 In the solution for 10 hours, then dried at 105°C for 15 hours, then calcined at 700°C for 4.5 hours, and then reduced with pure hydrogen at 350°C for 9 hours to obtain Pd-Sm-S-K / γ-Al 2 o 3 Catalyst C2. The composition of the catalyst and the physical property data obtained by nitrogen physical adsorption are shown in Table 1.

Embodiment 3

[0042] Weigh PdCl 2 Solid 61 g and SmCl 3 63.5 grams of solid, dissolved in 250 grams of 7wt% hydrochloric acid aqueous solution, added 100 grams of carrier γ-Al 2 o 3 Immerse for 16 hours, then dry at 120°C for 6 hours, then bake at 1000°C for 2 hours, then reduce with pure hydrogen at 600°C for 6 hours, and then impregnate in 210 grams of 10wt% K 2 SO 4 In solution for 16 hours, then dried at 120°C for 6 hours, then calcined at 1000°C for 3 hours, and then reduced with pure hydrogen at 600°C for 6 hours to obtain Pd-Sm-S-K / γ-Al 2 o 3 Catalyst C3. The composition of the catalyst and the physical property data obtained by nitrogen physical adsorption are shown in Table 1.

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Abstract

The invention relates to a catalyst for preparing beta-ionone, a preparation method of the catalyst and a method for preparing the beta-ionone by the catalyst. An active component of the catalyst comprises Pd, Sm, S and K elements. The catalyst is applied to preparation of the beta-ionone by the aid of alpha-ionone and / or gamma-ionone in a hydroisomerization manner, the transformation rate of rawmaterials is larger than 99%, and the yield of the beta-ionone is higher than 95%. The method can effectively solves the problems of high device requirement, extreme operating condition, high subsequent separation difficulty and the like of the prior art, and high-purity beta-ionone can be prepared when the production operation difficulty is reduced.

Description

technical field [0001] The invention belongs to the field of catalysts for organic chemical synthesis, and in particular relates to a catalyst for preparing beta-ionone by hydroisomerization reaction. Background technique [0002] β-ionone [4-(2,6,6-trimethyl-1-cyclohexenyl)-3-buten-2-one, β-ionone] is a kind of precious spice, which also has certain Biological activity, showing a strong anti-cancer effect, especially the obvious inhibitory effect on the occurrence of tumors. In addition, this product is widely used in industry and is a very important pharmaceutical intermediate and an important raw material for the synthesis of vitamins A, E, β-carotene, carotenoids, retinoic acid and phytol. [0003] The synthesis of β-ionone is generally generated by cyclization reaction using pseudoionone as raw material under acidic conditions. The product of the cyclization reaction is usually a mixture of three isomers of α-ionone, β-ionone and γ-ionone, among which the two isomers ...

Claims

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Application Information

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IPC IPC(8): B01J27/045C07C45/67C07C49/21
CPCC07C45/67B01J27/045C07B2200/09B01J35/613B01J35/633B01J35/635B01J35/647B01J35/615C07C49/21
Inventor 林龙吕英东张涛程晓波陈海波黎源华卫琦
Owner WANHUA CHEM GRP CO LTD
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