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Catalyst for preparing neopentyl glycol by hydrogenation of hydroxypivalaldehyde and preparation method thereof

A technology of hydrogenation catalyst and pivalaldehyde, which is applied to the preparation of hydroxyl compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of cost impact and total yield decline, and achieve The effect of avoiding pollution, stable performance and cheap price

Inactive Publication Date: 2012-01-04
SHANGHAI HUAYI ENERGY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the total yield from formaldehyde and isobutyraldehyde to neopentyl glycol will decrease accordingly. For a neopentyl glycol plant with tens of thousands of tons per year, the impact on cost is obviously significant

Method used

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  • Catalyst for preparing neopentyl glycol by hydrogenation of hydroxypivalaldehyde and preparation method thereof
  • Catalyst for preparing neopentyl glycol by hydrogenation of hydroxypivalaldehyde and preparation method thereof
  • Catalyst for preparing neopentyl glycol by hydrogenation of hydroxypivalaldehyde and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Catalyst preparation method of the present invention is as follows:

[0044] The manganese nitrate solution of 139g aluminum nitrate, 66.9g copper nitrate, 42.7g zinc nitrate, 4.6g 50wt% is mixed with mixed aqueous solution 500ml, and this mixed aqueous solution and mass fraction are the sodium carbonate aqueous solution of 20% and add dropwise to the Neutralize and control the temperature at about 80°C in a heat-preserved and stirred reactor; control the pH value of the reaction system to 9 during the neutralization process, and control the neutralization reaction time at 60 minutes. 1 hour; then, solid-liquid separation, filter cake beating and washing with 40~50 ℃ deionized water, so repeated filtration, beating and washing four times, so that the sodium content in the filter cake after roasting is reduced to below 0.15% (weight) . Dry at 120°C. Then it was calcined at 620°C for 1 hour, and pressed into pellets to obtain the catalyst (sample 1).

Embodiment 2

[0046] The amount of nitrate of copper, zinc and aluminum was the same as in Example 1, and 11.9g of 50% manganese nitrate solution was added. The preparation steps of the catalyst were the same as those in Example 1 to obtain Sample 2.

Embodiment 3

[0048] The amount of nitrate of copper, zinc and aluminum was the same as in Example 1, and 19.6g of 50% manganese nitrate solution was added, and the preparation steps of the catalyst were the same as those in Example 1 to obtain Sample 3.

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Abstract

The invention provides Cu-Zn-Al-Mn catalyst for preparing neopentyle glycol by hydrogenation of hydroxypivalaldehyde and a preparation method thereof, and belongs to the technical field of a catalyst. Based on the weight percentage of the catalyst, the catalyst comprises the following substances in percentage by weight: 20 to 50 percent of copper oxide, 20 to 40 percent of zinc oxide, 20 to 40 percent of alumina, and 1 to 10 percent of manganese oxide. The catalyst is prepared by a one-step precipitation method, has the advantages of high activity, good stability and the like, and has better hydrogenation capability to hydroxypivalaldehyde hydroxypivalic ester.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a copper-zinc-aluminum-based hydroxypivalaldehyde hydrogenation catalyst and a preparation method thereof. Background technique [0002] Neopentyl glycol is an important chemical intermediate. Neopentyl glycol is mainly used in the production of oil-free alkyd resins, polyester powder coatings, unsaturated polyester resins, printing inks, synthetic plasticizers and aviation lubricants. This product has good thermal stability, acid resistance, alkali resistance and weather resistance. Widely used in coatings, construction and insulation materials industries, 80% of the world's neopentyl glycol is used in the coatings industry. [0003] Neopentyl glycol is usually produced industrially by two methods: disproportionation and condensation hydrogenation. The biggest disadvantage of the disproportionation method is that a large amount of formate is formed as a by-produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C31/20C07C29/141
Inventor 金生亚蒋文张佶璘陈建伟
Owner SHANGHAI HUAYI ENERGY CHEM
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