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High performance alpha-pinene isomerization catalyst and application thereof

A catalyst and isomerization technology, used in physical/chemical process catalysts, isomerization hydrocarbon production, molecular sieve catalysts, etc., can solve the problem of low total selectivity, and achieve the effects of excellent performance, high activity and good selectivity

Inactive Publication Date: 2012-02-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At a reaction temperature of 100 oC, mesoporous Beta molecular sieves self-assembled from Beta zeolite seeds had the best catalytic performance, but the total selectivity of camphene and limonene was less than 50 %

Method used

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  • High performance alpha-pinene isomerization catalyst and application thereof
  • High performance alpha-pinene isomerization catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 3 g of commercial Beta molecular sieves were poured into a certain amount of NH 4 Cl solution at 70 o C for 2 h, suction filtration, washing, 110 o C drying, 550 o C was calcined for 5 h, and the catalyst was designated as HB-1.

[0017] 3 g commercial Beta molecular sieves were poured into a certain amount of NaOH solution (0.1, 0.2 mol / L) at 65 o C stirring for 30 min, suction filtration, washing, 110 o C drying, 550 o C was calcined for 5 h, and the obtained catalysts were denoted as HB-2 and HB-3, respectively.

[0018] 3g of HB-1 before roasting was poured into a certain amount of citric acid (0.5 mol / L) at 85 o C stirring for 4 h, suction filtration, washing, 110 o C drying, 550 o C roasting for 5 h, then add a certain amount of NaOH solution (0.2 mol / L) to the obtained material at 65 o C for 30 min, suction filtration, washing, 110 o C drying, 550 o C was calcined for 5 h, and the obtained material was denoted as HB-4.

[0019] 3g of HB-1 before roast...

Embodiment 2

[0024] By the HB-4 catalyst prepared in embodiment 1, at 60-90 oC The isomerization reaction of α-pinene was carried out for 30 min, and at 70 o C for 60 min and 120 min of isomerization. Other conditions are with embodiment 1. The results are shown in Table 2: HB-4 catalyzed α-pinene isomerization reaction results.

[0025] Table 2

Embodiment 3

[0027] By the HB-5 catalyst prepared in embodiment 1, at 50-90 oC Under the reaction temperature of α-pinene, carry out the isomerization reaction of 30min respectively, and at 60 oC for 60 min, 120 min and 240 min of isomerization. Other conditions are with embodiment 1. The results are shown in Table 3: HB-5 catalyzed α-pinene isomerization reaction results.

[0028] table 3

[0029]

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PUM

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Abstract

The invention relates to the fields of catalytic material and heterogeneous catalysis. A high performance alpha-pinene isomerization catalyst is prepared by using a commercial Beta molecular sieve as a raw material and carrying out a post treatment modification on the Beta molecular sieve through an alkali treatment. Specific preparation conditions comprise: employing sodium hydroxide solution to carry out an alkali treatment on the Beta molecular sieve; filtering; washing; drying at 110 DEG C; and roasting at 550 DEG C. The catalyst preparation method of the invention is simply operated and has mild reaction conditions on alpha-pinene isomerization; main products of camphene, alpha-terpinene, limonene, gamma-terpinene and terpinolene have high selectivity; the catalyst has no pollution to equipment and environment; and the catalytic process is environment friendly.

Description

technical field [0001] The invention relates to the field of catalytic materials and heterogeneous catalysis, in particular to a catalyst capable of efficiently catalyzing the isomerization of α-pinene, and also relates to its application. Background technique [0002] α-pinene is the main component of turpentine, which is the most produced and cheapest essential oil in the world. α-pinene is particularly sensitive to acids, and can undergo reactions such as isomerization, oxidation, hydrogenation, addition, esterification, and polymerization, especially the isomerization products under the action of acids, which are ideal for the preparation of spices, medicines, and fine chemicals. important intermediates, such as the synthesis of camphor from camphene. There are many catalysts for isomerization of α-pinene, but the reaction products are complicated. Therefore, under relatively mild reaction conditions, improving the conversion rate of α-pinene and the selectivity of hig...

Claims

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Application Information

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IPC IPC(8): B01J29/70C07C13/40C07C13/21C07C5/27C07C5/25C07C5/31
Inventor 田福平吴义辉李想贾翠英
Owner DALIAN UNIV OF TECH
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