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Reaction catalyst for preparing gamma-butyrolactone through maleic anhydride hydrogenation, and preparation method and application thereof

A technology of maleic anhydride and catalyst is applied in the reaction catalyst for producing γ-butyrolactone by hydrogenation of maleic anhydride and its preparation and application fields, and achieves low cost, high target product selectivity and excellent hydrogenation activity Effect

Active Publication Date: 2021-12-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that it is a great technical challenge to realize the high activity and high selectivity of the hydrogenation of maleic anhydride to γ-butyrolactone while maintaining high stability.

Method used

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  • Reaction catalyst for preparing gamma-butyrolactone through maleic anhydride hydrogenation, and preparation method and application thereof
  • Reaction catalyst for preparing gamma-butyrolactone through maleic anhydride hydrogenation, and preparation method and application thereof
  • Reaction catalyst for preparing gamma-butyrolactone through maleic anhydride hydrogenation, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] One, the preparation of 40wt%Ni-MFI catalyst

[0042] (1) In the mixed solution of ethyl orthosilicate and water, add a certain amount of tetrabutylammonium hydroxide aqueous solution dropwise, stir for 3h to obtain a molar composition of 1.0 ethyl orthosilicate: 3.0 tetrapropylammonium hydroxide: 56 solution in water;

[0043] (2) Put the obtained transparent solution into a stainless steel hydrothermal kettle, and crystallize at 170°C for 4 days;

[0044] (3) The obtained white powder was centrifuged, dried at 100° C. for 10 hours, and calcined at 550° C. for 6 hours to obtain an MFI molecular sieve with a microporous structure.

[0045] (4) Dissolve nickel nitrate hexahydrate in water, add a concentration of 25% ammonia, stir for 10 minutes and stir with the above-mentioned microporous structure MFI molecular sieve for 5 hours, the mass composition of the suspension is 1.0 carrier: 0.67 metal theoretical load mass: 15 Ammonia water: 200% water, then distill ammonia...

Embodiment 2

[0060] The difference between Example 2 and Example 1 is that the prepared catalyst is a catalyst 40wt% Ni-PS using silica sol as a silicon source, wherein 40wt% alkaline silica sol is added to the nickel-ammonia complex solution.

[0061] The specific method for the preparation of 40wt%Ni-PS is as follows: Ni(NO 3 ) 2 6H 2 Dissolve O in water, add 25% ammonia and stir for 100 minutes to obtain a nickel-ammonia complex solution, then add alkaline silica sol drop by drop, the mass ratio of each component of the suspension is: 1.0 carrier: 0.67 metal theoretical load Quality: 15% ammonia water (25wt%): 200% water, stir for 5 hours; then distill ammonia at 80°C for 8h, put the suspension in a non-closed container, use the volatilization characteristics of ammonia at 80°C to make the ammonia in the suspension The content gradually decreased until the pH=7, then washed, filtered and dried, and after roasting at 550°C for 5h, a 40wt% Ni-PS catalyst oxide precursor was obtained; t...

Embodiment 3

[0065] The difference between Example 3 and Example 1 is that the prepared catalyst uses mesoporous silicon (ie commercial silica carrier) as the carrier of 40 wt% Ni-MSI catalyst, and mesoporous silicon powder is added to the nickel ammonium complex solution.

[0066] The specific method of the preparation of 40wt%Ni-MSI is as follows: Ni(NO 3 ) 2 6H 2 O was dissolved in water, stirred for 15 min after adding ammonia water to obtain a nickel-ammonia complex solution, then added mesoporous silicon powder in batches, the mass ratio of each component of the suspension was: 1.0 carrier: 0.67 metal theoretical load mass: 15 ammonia water ( 25wt%): 200% water, stirred for 5h; then distilled ammonia at 80°C for 8h until pH = 7, washed, filtered and dried, and roasted at 550°C for 5h to obtain a 40wt% Ni-MSI catalyst oxide precursor; 2 Reduction at 500°C for 2 hours under hydrogen atmosphere, hydrogen space velocity is 2000h -1 , to obtain the target catalyst 40wt% Ni-MSI.

[00...

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Abstract

The invention discloses a reaction catalyst for preparing gamma-butyrolactone through maleic anhydride hydrogenation, and a preparation method and application thereof. The catalyst has a hierarchical pore structure and relates to two transition metals A and B and a silicon-based MFI molecular sieve. The micropore diameter of the MFI molecular sieve is 0.6 to 0.8 nm; and the component A of the catalyst metal part mainly refers to one or more than two of transition metal elements Fe, Co, Ni, Cu and Zn, the component B refers to one or more than two of metals Zr, Y, Hf, La, Ce, Sn and Ti, and active metal components are loaded in an in-situ synthesis or post-treatment mode. The invention provides the high-stability and high-efficiency catalyst for catalyzing maleic anhydride hydrogenation to prepare gamma-butyrolactone, and the preparation method thereof. Compared with a noble metal catalyst, the catalyst is cheaper in cost, can be comparable with the catalytic performance of the noble metal catalyst in the reaction, and has an industrial application prospect.

Description

technical field [0001] The present invention relates to a catalyst for producing γ-butyrolactone by hydrogenation of maleic anhydride and its preparation and application. Specifically, it is used in hydrothermal in-situ synthesis of transition metal B-doped microporous structure B-MFI molecular sieves. The ammonia distillation method introduces the active metal component A, thereby modulating the MFI molecular sieve with a multi-level pore structure and a new preparation method for a catalyst rich in Lewis acid centers and hydrogenation centers, as well as a new preparation method in the hydrogenation of maleic anhydride to γ-butyrate Application of lactones. Background technique [0002] GBL or γ-butyrolactone is one of the important organic chemical products. It has the characteristics of solubility, good stability and high conductivity. It is a protic solvent with high safety, low toxicity and environmental protection. The main use of butyrolactone as an intermediate is ...

Claims

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Application Information

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IPC IPC(8): B01J29/46B01J29/48B01J37/10B01J37/18B01J37/08B01J35/10C07D307/33
CPCB01J29/46B01J29/48B01J37/10B01J37/18B01J37/082B01J37/0018C07D307/33B01J2229/186B01J35/615B01J35/633
Inventor 郑明远李昊宇李显泉张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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