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Preparation and use of heteropolyacid catalyst carried on dealuminized super-stable gamma zeolite

A technology for loading heteropolyacids and catalysts, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unexamined catalyst dissolution performance and has not yet occurred, and achieve obvious industrial application prospects and easy operation , low cost effect

Inactive Publication Date: 2005-02-23
NANJING UNIV OF TECH
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Problems solved by technology

At the same time, in these patents, the stripping performance of the catalyst is not investigated, and this performance is a decisive factor for whether this type of catalyst has industrial app

Method used

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  • Preparation and use of heteropolyacid catalyst carried on dealuminized super-stable gamma zeolite

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] 30% Cs 1 H 2 PW 12 O 40 / DUSY-650℃ catalyst preparation

[0030] (1) Weigh 100g of USY zeolite in a crucible, add 120g of deionized water and mix it thoroughly, then place it in a muffle furnace with a lid, and quickly heat up to 650°C at a rate of 15°C / min, and calcine at this temperature for 4 hours Take out the sample, after cooling, filter and wash in 2mol / L HCl solution at 95°C for 2 hours, filter and wash with deionized water three times, dry at 110°C, and calcinate at 500°C for 8 hours to get dealuminated Ultra-stable Y zeolite (DUSY-650°C).

[0031] (2) 0.457g cesium carbonate (analytical grade) was prepared into an aqueous solution with a concentration of 0.028mol / L, mixed with the 21g DUSY-650℃ sample taken from step (1), stirred at room temperature for 12 hours, at a temperature of 95℃ and pressure The water is evaporated to dryness under the condition of 1atm, and treated in a muffle furnace at 500°C for 4 hours.

[0032] (3) Add 9.084g tungst...

Example Embodiment

[0033] Example 2

[0034] 30% Cs 1.5 H 1.5 PW 12 O 40 / DUSY-650℃ catalyst preparation

[0035] (1) The treatment conditions of the carrier are exactly the same as in Example 1.

[0036] (2) The conditions are the same as in Example 1(2), except that the dosage of cesium carbonate is changed to 0.685g.

[0037] (3) The conditions are consistent with Example 1(3).

Example Embodiment

[0038] Example 3

[0039] 30% Cs 2 HPW 12 O 40 / DUSY-650℃ catalyst preparation

[0040] (1) The treatment conditions of the carrier are exactly the same as in Example 1.

[0041] (2) The conditions are the same as in Example 1(2), except that the dosage of cesium carbonate is changed to 0.913g.

[0042] (3) The conditions are consistent with Example 1(3).

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Abstract

A dealuminated super-stable Y-zeolite carried heteropoly acid salt catalyst used for the liquid-phase esterifying reaction between acetic acid and butanol is prepared through proportionally mixing USY zeolite with deionized water, steam treaitng, acid washing, filtering, drying, calcining to obtain carrier, immersing in the acqueous solution of the carbonate or nitrate of alkali metal, drying, calcining, immersing in solution of heteropoly acid, drying and calcining.

Description

technical field [0001] The present invention relates to a preparation method of a supported heteropolysalt catalyst and the application of the catalyst in esterification, in particular to a preparation method of a dealuminated USY zeolite-supported heteropolysalt catalyst and the catalyst in acetic acid and n-butyl Application in liquid-phase esterification of alcohols. Background technique [0002] In the liquid phase esterification reaction of carboxylic acid and fatty alcohol, the traditional catalysts are inorganic liquid acid or Lewis acid, including H 2 SO 4 , AlCl 3 , HF, etc. Although these traditional catalysts have high activity and good selectivity, they are highly corrosive and toxic, which will cause a series of problems such as equipment corrosion, complicated product post-processing and environmental pollution. Therefore, it is inevitable to develop environmentally friendly solid acid catalysts. [0003] Heteropolyacid is a new type of solid acid catalyst....

Claims

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Application Information

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IPC IPC(8): B01J23/16B01J27/188B01J29/08
Inventor 王军张富民
Owner NANJING UNIV OF TECH
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