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Preparation method and application of loaded-type nickel catalyst

A nickel catalyst, supported technology, applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of product separation catalyst recovery difficulty, increase product separation and purification burden, and decrease of main product yield, etc. Achieve long service life, reduce production costs, and good stability

Inactive Publication Date: 2014-08-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the content of trans-pinane in the pinane raw material is too high, it will lead to a decrease in the yield of the main product and increase the burden of product separation and purification
[0003] Among the currently used catalysts for the hydrogenation of α-pinene to prepare cis-pinane, noble metal catalysts such as palladium, platinum, and rhodium have higher catalytic activity, and the reaction conditions are milder, but the production cost is high, and product separation and catalyst recovery are relatively high. difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The Ni / TiO described in this example 2 -Al 2 o 3 The preparation of supported catalyst specifically comprises the following methods:

[0027] (1) Mix butyl titanate and absolute ethanol at a volume ratio of butyl titanate to absolute ethanol of 1:1.5, and stir vigorously to obtain a mixed solution. The volume ratio of absolute ethanol to acetic acid is 10: A ratio of 1 is added to the mixed solution to form solution A;

[0028] (2) Mix deionized water and absolute ethanol at a volume ratio of 1:5 to obtain a mixed solution, add dilute hydrochloric acid or dilute nitric acid to the mixed solution to adjust the pH of the mixed solution to 2 Obtain solution B;

[0029] (3) Add solution B to solution A at a volume ratio of 1:4 between solution B and solution A, and then set the molar ratio of butyl titanate to cetyltrimethylammonium bromide as 1: Add cetyltrimethylammonium bromide at a ratio of 0.05 to form a titanium sol;

[0030] (4) Press γ-Al 2 o 3 Add γ-Al to ...

Embodiment 2

[0039] The Ni / TiO described in this example 2 -Al 2 o 3 The preparation of supported catalyst specifically comprises the following methods:

[0040] (1) Mix butyl titanate and absolute ethanol at a volume ratio of 1:3 between butyl titanate and absolute ethanol, and stir vigorously to obtain a mixed solution. The volume ratio of absolute ethanol to acetic acid is 20: A ratio of 1 is added to the mixed solution to form solution A;

[0041] (2) Mix deionized water and absolute ethanol at a volume ratio of 1:7 to obtain a mixed solution, add dilute hydrochloric acid or dilute nitric acid to the mixed solution to adjust the pH of the mixed solution to 3 Obtain solution B;

[0042](3) Add solution B to solution A at a volume ratio of 1:2 between solution B and solution A, and then set the molar ratio of butyl titanate to cetyltrimethylammonium bromide as 1: Add cetyltrimethylammonium bromide at a ratio of 0.2 to form a titanium sol;

[0043] (4) Press γ-Al 2 o 3 Add γ-Al t...

Embodiment 3

[0052] 1. Ni / TiO described in this example 2 -Al 2 o 3 The preparation of supported catalyst specifically comprises the following methods:

[0053] (1) Mix butyl titanate and absolute ethanol at a volume ratio of 1:2 between butyl titanate and absolute ethanol, and stir vigorously to obtain a mixed solution. The volume ratio of absolute ethanol to acetic acid is 15: A ratio of 1 is added to the mixed solution to form solution A;

[0054] (2) Mix deionized water and absolute ethanol at a volume ratio of 1:9 to obtain a mixed solution, add dilute hydrochloric acid or dilute nitric acid to the mixed solution to adjust the pH of the mixed solution to 4 Obtain solution B;

[0055] (3) Add solution B to solution A at a ratio of 1:3 by volume between solution B and solution A, and then set the molar ratio of butyl titanate to cetyltrimethylammonium bromide as 1: Add cetyltrimethylammonium bromide at a ratio of 0.2 to form a titanium sol;

[0056] (4) Press γ-Al 2 o 3 Add γ-A...

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PUM

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Abstract

The invention discloses a preparation method and an application of a loaded-type nickel catalyst, and belongs to the chemical engineering field. The preparation method of the loaded-type nickel catalyst comprises the preparation process steps: adding anhydrous ethanol into butyl titanate, then strongly stirring, next adding acetic acid, and fully stirring to form a solution A; after mixing deionized water with anhydrous ethanol, adjusting the pH value to form a solution B; adding the solution B into the solution A drop by drop, adding cetyl trimethyl ammonium bromide, and stirring to form a titanium sol; adding gamma-Al2O3 and deionized water into the titanium sol, fully stirring, standing, drying, and roasting to obtain a composite carrier; and dipping the composite carrier in a nickel nitrate aqueous solution, then fully stirring, drying, roasting, introducing hydrogen, and carrying out reduction treatment to obtain the Ni / TiO2-Al2O3 loaded-type catalyst. The loaded-type nickel catalyst is used for alpha-pinene hydrogenation reaction, the process flow is simple, the catalyst use amount is little, the alpha-pinene conversion rate is high, and the cis-pinane selectivity is good.

Description

technical field [0001] The invention relates to a preparation method and application of a supported nickel catalyst, belonging to the field of chemical industry. Background technique [0002] α-pinene is the main component of turpentine, which is distilled from pine resin secreted by pine trees. It is a natural essential oil with the largest output and the cheapest price. Pinane can be produced by catalytic hydrogenation of α-pinene. There are cis- and trans-isomers in pinane. Cis-pinane is an important raw material for the perfume and pharmaceutical industries and other pinene deep-processing industries. Especially the pinane used in the perfume industry requires cis-pinane as the main ingredient, because the reactivity of cis-pinane is higher than that of trans-pinane, and it is an important raw material for the preparation of linalool and dihydromyrcenol fragrances. If the content of trans-pinane in the pinane raw material is too high, the yield of the main product will ...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J32/00C07C13/40C07C5/03
Inventor 王亚明蒋丽红李丹丹贾庆明陕绍云杨晨刘坤马全丽
Owner KUNMING UNIV OF SCI & TECH
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