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Composite solid acid catalyst for preparing 2, 2, 4-trimethyl-1, 3-pentanediol diisobutyrate and preparation method

A technology of pentanediol diisobutyrate and solid acid catalyst is applied in chemical instruments and methods, physical/chemical process catalysts, preparation of carboxylate, etc., and can solve the problem of low conversion rate of alcohol ester, low product selectivity, Produce industrial wastewater and other problems, achieve the effects of good stability, high activity and uniform pore channels

Pending Publication Date: 2020-07-10
RUNTAI CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liquid acid is used as a catalyst with high reactivity, but at the same time, traditional liquid acid catalysts also have many disadvantages: corrosion of equipment, production of industrial wastewater, heavy pollution, etc.
[0003] In addition, the use of liquid acid as a catalyst for the esterification of isobutyric acid and dodecyl alcohol esters has good catalytic performance, but there are still many problems, such as: low product selectivity, low alcohol ester conversion, long reaction time and other issues, therefore, the research and development of new green catalysts has become an urgent demand

Method used

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  • Composite solid acid catalyst for preparing 2, 2, 4-trimethyl-1, 3-pentanediol diisobutyrate and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of supported composite solid acid catalyst:

[0026] (1) Weigh ZrCl 4 (0.233g, 1.0mmol) and PTA (0.166g, 1.0mmol) were dissolved in DMF (50mL) to form a solution, and the mixture was stirred at room temperature in a flask for 30 minutes;

[0027] (2) Place the prepared solution in step (1) in a lined autoclave, and keep it in an oven at 120°C for 48 hours;

[0028] (3) Obtain a solid sample by filtration, and fully wash 3 times with DMF and ethanol to obtain a white powder;

[0029] (4) Dry the obtained white powder in a vacuum oven at 100°C overnight to finally obtain UiO-66;

[0030] (5) Weigh 0.5g of titanium nitrate and dissolve it in 5ml of deionized water, drop it into the UiO-66 prepared in step (4), and ultrasonicate for 30 minutes;

[0031] (6) Let it stand for 12 hours, and then dry it at 110°C to obtain the precursor;

[0032] (7) The precursor passes through the continuous NH 3 Heating from room temperature to 700 °C at a heating rate of ...

Embodiment 2

[0037] The titanium nitrate in embodiment 1 step (5) is changed into ferric nitrate, prepares catalyst, and uses ZrO 2 -Fe 2 o 3 @NC instead of ZrO in Example 1 2 -TiO 2 @NC, the rest of the steps are the same as in Example 1.

Embodiment 3

[0039] Change the titanium nitrate in embodiment 1 step (5) into copper nitrate, prepare catalyst, and use ZrO 2 -CuO@NC instead of ZrO in Example 1 2 -TiO 2 @NC, the rest of the steps are the same as in Example 1.

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Abstract

The invention belongs to the technical field of catalysts, and particularly provides a composite solid acid catalyst for preparing 2, 2, 4-trimethyl-1, 3-pentanediol diisobutyrate and a preparation method. According to the preparation method, firstly a metal organic framework is prepared, then metal ions are loaded, and then pyrolysis under ammonia gas flow is carried out to prepare nitrogen-containing mesoporous carbon with uniform pore channels, the organic metal framework can enable metal particles to be dispersed more uniformly, and the nitrogen element is successfully introduced under theaction of the ammonia gas flow, so that the metal surface area of the catalyst is large, and the nitrogen content is greatly increased, and finally, strong acid, super acid and heteropolyacid are loaded. The prepared catalyst is high in esterification reaction activity, good in stability and free of pollution, is a green catalyst, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a composite solid acid catalyst for preparing 2,2,4-trimethyl-1,3-pentanediol diisobutyrate and a preparation method thereof. Background technique [0002] Esterification is an important chemical production route for the synthesis of raw materials and intermediates, and its products are widely used in the fields of surfactants, resins, coatings, plasticizers, daily chemicals, and pharmaceuticals. Traditionally, liquid acid is used as catalyst in esterification reaction, such as: concentrated sulfuric acid, etc. Liquid acid is used as a catalyst with high reactivity, but at the same time, the traditional liquid acid catalyst also has many disadvantages: corrosion of equipment, production of industrial wastewater, heavy pollution, etc. With the improvement of people's awareness of environmental protection, the research and development of green catalysts has received ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C07C67/08C07C69/28
CPCB01J27/24C07C67/08C07C69/28
Inventor 宋文国张世元张润赟杨萍
Owner RUNTAI CHEM CO LTD
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