Preparation of catalyst for synthesizing ethyl acetate

A technology of ethyl acetate and catalyst, which is applied in the field of catalyst preparation, can solve the problems of low reaction conversion rate, low recovery and reuse effect, unsatisfactory application, etc., and achieve high activity, low cost and high stability

Inactive Publication Date: 2008-09-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Using solid superacid instead of concentrated sulfuric acid as catalyst is the main research direction. This is mainly because solid superacid is environmentally friendly and

Method used

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Examples

Experimental program
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Embodiment

[0009] γ-Al 2 o 3 Place in the container and be evacuated to 0.01MPa, continue to be evacuated for 4 hours and then add 10ml of 5% sodium dodecylbenzenesulfonate ethanol solution and 10ml of 10% by weight polyethylene glycol (molecular weight) of 20000 PEG) after stirring evenly, according to each gram of γ-Al 2 o 3 Load 0.6ZrO 2 The metering ratio of adding 1.0mol / L of ZrOCl 2 solution, stirring continuously, adding 10% by weight NH after immersion for 4 hours 3 .H 2 O, adjust pH=10.5, age at 90°C for 4 hours, filter and wash to remove Cl - (tested with silver nitrate solution), then dried in a microwave oven for 12 minutes, and baked at 600°C for 4 hours to obtain a sample ZrO 2 / γ-Al 2 o 3 Composite carrier, with 2mol / L H 2 SO 4 Impregnated ZrO 2 / γ-Al 2 o 3 Composite carrier for 24 hours, filter to remove excess H 2 SO 4 solution, microwave drying, and calcined in a muffle furnace at 500°C for 3 hours to obtain SO 4 2- / ZrO 2 / γ-Al 2 o 3 catalyst.

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PUM

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Abstract

The invention discloses a preparation method of a catalyst for synthesizing ethyl acetate, which comprises the following steps: (1) meso-porous Upsilon -Al2O3 is adopted as substrate supporter, nano-sized ZrO2 is synthesized on the substrate supporter by the deposition-precipitation method directly to prepare loaded nano-sized Zro2/ Upsilon -Al2O3 composite carrier, (2) SO4 <-2> is carried by the composite carrier to prepare solid acid catalyst SO4<-2>/ZrO2/ Upsilon -Al2O3, (3) ethyl acetate is synthesized, which adopts acetic acid, ethanol and SO4<-2>/ZrO2/ Upsilon -Al2O3 as material, and (4) the transformation rate of acetic acid is above 95%, and the yield of ethyl acetate is above 90%. The catalyst for synthesizing ethyl acetate has the advantages of low cost, no environment and equipment pollution, high activity, and high selectivity and stability.

Description

technical field [0001] The invention relates to the field of catalytic materials and heterogeneous catalysis, in particular to a method for preparing a catalyst for synthesizing ethyl acetate. Background technique [0002] Ethyl acetate, also known as ethyl acetate, is a colorless and transparent liquid with a fruity aroma. It is the main industrial solvent and is often used as a binder or extractant in the production of various related products. It is the most common chemical raw material. The industrial production methods of ethyl acetate mainly include ethyl acetate esterification method, acetaldehyde condensation method, ethanol dehydrogenation disproportionation method and the ethylene / acetic acid direct synthesis method that has been industrialized recently. At present, the most widely used production method is the esterification of acetic acid ethanol, and the catalysts used in the esterification method include: concentrated sulfuric acid, solid superacid (solid acid ...

Claims

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Application Information

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IPC IPC(8): B01J27/053C07C67/08C07C69/14
Inventor 李凝杨世军蒋锡福
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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