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Load type nano gold catalyst for preparing lactone by catalyzing air oxidation alpha, omega-diol and preparation method thereof

An air oxidation and catalyst technology, applied in the chemical industry, can solve the problems of dangerous operation, not in line with sustainable development and green chemistry, expensive and other problems, and achieve the effects of easy separation and recovery, good catalytic oxidation activity and high selectivity

Inactive Publication Date: 2010-03-31
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently commonly used α, ω-diol one-step oxidation process must use more intense oxidation conditions, such as high temperature and strong oxidants such as peroxides, strong oxidizing acids, etc., or in the presence of co-oxidants. Dangerous, expensive, and a large amount of pollutants are produced during the reaction, which does not meet the requirements of sustainable development and green chemistry

Method used

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  • Load type nano gold catalyst for preparing lactone by catalyzing air oxidation alpha, omega-diol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1.67g FeSO 4 ·7H 2 O was mixed with 50ml ethanolamine and dissolved by sonication. Then 50ml of deionized water was added, the resulting solution was transferred to a hydrothermal reaction kettle, and placed in an oven at 120° C. for 2 hours. The resulting mixture was centrifuged, washed with ethanol four times, dried, and calcined at 800° C. for 4 hours, and the obtained iron oxide carrier was 1# carrier. Add 10ml 2.43mmol / L HAuCl to 48ml deionized water 4 Solution, 2.91g urea and 0.6g 1# carrier, stirred at 60°C for 24h, suction filtered, washed, dried, and calcined at 100°C for 4 hours, the obtained catalyst was designated as 1# catalyst. Reaction conditions: 20ml tributyl phosphate, 1.4g 1,4-butanediol, 0.190g 1# catalyst, 1.25Mpa air, 100°C, electromagnetic stirring for 1 hour.

Embodiment 2

[0024] 1.67g FeSO 4 ·7H 2 O was mixed with 50ml ethanolamine and dissolved by sonication. Then 50ml of deionized water was added, the resulting solution was transferred to a hydrothermal reaction kettle, and placed in an oven at 70°C for 14h. The resulting mixture was centrifuged, washed with ethanol four times, dried, and then calcined at 300° C. for 4 hours, and the obtained iron oxide carrier was 2# carrier. Add 10ml 2.43mmol / L HAuCl to 48ml deionized water 4 Solution, 2.91g urea and 0.6g 2# carrier, stirred at 90°C for 1h, suction filtered, washed, dried, and calcined at 300°C for 4 hours, the obtained catalyst was designated as 2# catalyst. Reaction conditions: 20ml tributyl phosphate, 1.4g 1,4-butanediol, 0.190g 2# catalyst, 1.25Mpa air, 150°C, electromagnetic stirring for 2 hours.

Embodiment 3

[0026] 3.34 g FeSO 4 ·7H 2 O was mixed with 130ml ethanolamine and dissolved by sonication. Then 100ml of deionized water was added, and the resulting solution was transferred to a hydrothermal reaction kettle, and stood at 100°C for 5h. The obtained mixture was centrifuged, washed with ethanol four times, and dried at room temperature, and the obtained iron oxide carrier was 3# carrier. Add 10ml 2.43mmol / L HAuCl to 48ml deionized water 4 Solution, 2.91g urea and 0.6g 3# carrier, stirred at 80°C for 2h, suction filtered, washed, dried, and calcined at 500°C for 4 hours, the obtained catalyst was designated as 3# catalyst. Reaction conditions: 20ml tributyl phosphate, 1.4g 1,4-butanediol, 0.190g 3# catalyst, 1.25Mpa air, 50°C, electromagnetic stirring for 3 hours.

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Abstract

The invention belongs to the technical field of the chemical industry, which relates to a load type nano gold catalyst for preparing lactone by catalyzing air oxidation alpha, omega-diol. The invention adopts nano iron oxide as a carrier of a gold catalyst, the iron oxide is synthesized by a hydrothermal method, and nano iron oxide carriers with different crystal types and patterns can be preparedby calcination. The gold catalyst is prepared by a precipitation settling method, the prepared catalyst has small gold particles and good dispersivity, the interaction of gold and the carrier is strong, the gold catalyst represents an excellent activity in the preparation of gamma-butyrolactone by the direct oxidation of 1,4-butanediol through catalyzing air and the preparation of delta-valerolactone by oxidizing 1,5-pentanediol and conforms to the requirement of green chemistry, and the generation of lactone by oxidizing alpha, omega-diol in one step is realized. A magnetic iron oxide carrier can be obtained by selecting a proper preparation method, and the invention is convenient to separate and recover the catalyst and has better industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a gold / iron oxide nano catalyst, in particular to an environment-friendly supported nano gold catalyst for catalyzing air oxidation of α, ω-diol to prepare lactone and a preparation method thereof. Background technique [0002] It is well known in the art that lactone ring compounds are an important class of compounds, and lactones can be used as solvents, extractants, and intermediates for various biochemical products, fibers, and pesticides, so they are used in agriculture, petrochemicals, medicine, resins, and It is widely used in fiber and other fields. Lactones can be synthesized by one-step oxidation of α,ω-diols. The currently commonly used α, ω-diol one-step oxidation process must use more intense oxidation conditions, such as high temperature and strong oxidants such as peroxides, strong oxidizing acids, etc., or in the presence of co-oxidants. Dangerous, expens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07D315/00
CPCY02P20/584
Inventor 戴维林黄捷范康年
Owner FUDAN UNIV
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