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Catalyst for preparing neopentyl glycol by hydrogenation and preparation method of catalyst

A technology for neopentyl glycol and catalyst, which is applied to the catalyst for hydrogenation to prepare neopentyl glycol and the field of preparation thereof, can solve the problems of low conversion rate, high HPA decomposition rate, poor selectivity, etc., and achieves reduction of decomposition and simplification of post-processing. , the effect of reducing the overall cost

Active Publication Date: 2012-10-17
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing catalysts for preparing NPG by hydrogenation are difficult to overcome when the hydrogenation raw material is the condensation reaction liquid of formaldehyde and n-butyraldehyde containing 1115 ester, the reaction pressure is high, the selectivity of HPA to NPG is poor, the decomposition rate of HPA in the hydrogenation raw material is high, and the hydrogenation raw material Defects such as low conversion rate of 1115 ester hydrogenation into NPG

Method used

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

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Embodiment 1

[0037] 12.6g zirconium nitrate, 120g copper nitrate, 35.55g zinc nitrate, 147.88g aluminum nitrate, 0.65g rhenium nitrate were dissolved in water to prepare 1000ml, and 25wt% sodium carbonate aqueous solution was slowly added dropwise to the tank with stirring and heating and heat preservation functions. In the reaction kettle, control the reaction temperature at 85-90°C, the reaction process requires a pH between 9.5-10.5, keep the reaction at 1-1.5 hours, cool down to 65°C and age for 1.5 hours, then perform centrifugation, and deionize the solid phase Wash with water until the sodium content is less than 0.1%, dry at 700°C for 1.5 hours after solid-phase drying, and press into pellets to prepare the catalyst sample 1.

Embodiment 2

[0039] The amount of other nitrates was as in Example 1, and the amount of rhenium nitrate was increased to 1.9 g, and the preparation method was as in Example 1 to prepare catalyst sample 2.

Embodiment 3

[0041] The amount of other nitrates was as in Example 1, and the amount of rhenium nitrate was increased to 2.5 g, and the preparation method was as in Example 1 to prepare catalyst sample 3.

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Abstract

The invention relates to a catalyst for preparing neopentyl glycol (NPG) by hydrogenation and a preparation method of the catalyst. Based on the total weight of the catalyst, the catalyst contains 15-50wt% of copper oxide, 10-30wt% of zinc oxide, 20-40wt% of alumina, 1-15wt% of one or two or three kinds of titanium oxide, zirconium oxide or hafnium oxide. In addition, 0.1-1wt% of rhenium oxide is also added. The catalyst is prepared by a co-precipitation method, then the mixed gas of hydrogen and nitrogen is used to reduce and activate the catalyst for preparing NPG by hydrogenation. With the adoption of the catalyst provided by the invention, the raw material of hydrogenation has high conversion, and the NPG has high selectivity.

Description

technical field [0001] The invention relates to a catalyst for preparing neopentyl glycol (NPG) by hydrogenation and a preparation method thereof. Background technique [0002] NPG is an important chemical intermediate. It is mainly used in the production of unsaturated resins, polyester powder coatings, oil-free alkyd resins, polyurethane foams, plasticizers for elastomers, synthetic plasticizers, surfactants, insulating materials, printing inks, polymerization inhibitors, Synthetic aviation lubricating oil additives, etc. In addition, it is also used in the pharmaceutical industry. At the same time, NPG is also an excellent solvent and can be used for the selective separation of aromatics and cycloalkyl hydrocarbons. [0003] NPG usually has two kinds of processes: disproportionation method and condensation hydrogenation method in industry. The disproportionation method produces a large amount of sodium formate by-product, the product quality is relatively poor, and th...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C31/20C07C29/141C07C29/149
Inventor 何光文王中华李浩黎源曹善健宋锦宏华卫琦丁皓
Owner WANHUA CHEM GRP CO LTD
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