Method for preparing p-tert-butylbenzaldehyde by carrying out liquid phase oxidation on p-tert-butyltoluene

A technology of p-tert-butyltoluene and p-tert-butyl, which is applied in the chemical field, can solve problems such as affecting mass transfer, increasing equipment investment, and hidden safety hazards, achieving the effects of mild reaction conditions, reducing investment costs, and improving quality

Active Publication Date: 2018-08-24
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology reduces costs by replacing expensive reagents with less harmful chemical substances like acids or bases while also enhancing the production process for certain types of products such as fuel cells. It achieves this through making them microemulsified (microdroplets) that allow gases/liquid phase mixtures to move easily from one part to another. These tiny drops help create strong bonds within each other when reacting together. Additionally, it allows reuse of these materials during different stages of manufacturing processes.

Problems solved by technology

Technological Problem: Current methods for producing high purity (>99%) p-TERTBP benzyl alcohol have issues with removing excessive amounts of impurities from crude products or generating large quantities of waste during manufacturing processes that require expensive chemical reagents such as acids. Additionally, these techniques may result in contamination by harmful substances like tertiary amines found on some medications.

Method used

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  • Method for preparing p-tert-butylbenzaldehyde by carrying out liquid phase oxidation on p-tert-butyltoluene
  • Method for preparing p-tert-butylbenzaldehyde by carrying out liquid phase oxidation on p-tert-butyltoluene

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 1.48 kg of p-tert-butyl toluene and place it in a raw material storage tank, weigh 1.41 kg of water, 0.007 kg of p-tert-butyl benzoate, 0.063 kg of tert-butyl benzyl alcohol, 15 mg of auxiliary agent, 15 mg of catalyst, and over Sodium oxycarbonate 0.0015 kg is dissolved in the solvent storage tank, wherein the additives are 10 mg of sodium p-tert-butylbenzoate and 5 mg of sodium dodecylbenzenesulfonate, and the catalyst is benzopyrimidine cobalt complex, through the corresponding metering pump Transport to the corresponding storage tank, heat up to 40°C through the heat exchanger, the two fluids collide in the impingement flow reactor, and the micron-sized emulsion produced is transported to the bubble column reactor through the ejector, and the ejector entrains and bubbles Oxygen and fresh oxygen at the top of the reactor are oxidized in the bubble column reactor, and oxygen is delivered to the bubble reactor through the gas distributor to ensure the reaction for...

Embodiment 2

[0036] Take by weighing 1065g of p-tert-butyl toluene and place it in a raw material storage tank, weigh 7.1 kg of water, 460 g of p-tert-butyl benzoate, 1.42 kg of p-tert-butyl benzyl alcohol, 0.4 g of auxiliary agent, 0.4 g of catalyst, and over Sodium oxycarbonate 480g is dissolved in the solvent storage tank, wherein additives are 0.1 g of sodium p-tert-butylbenzoate, 0.1 g of potassium p-tert-butylbenzoate and 0.2 g of heavy alkylbenzene sulfonate, and the catalyst is nickel benzopyrazole 0.2 g of the complex and 0.2 g of the benzopyridine vanadium complex were transported to the corresponding storage tank through the corresponding metering pump, and the temperature was raised to 80°C through the heat exchanger, and the two fluids collided in the impinging flow reactor, resulting in The micron-sized emulsion is transported to the bubble column reactor through the ejector, and the oxygen and fresh oxygen at the top of the bubble reactor are entrained by the ejector, and the...

Embodiment 3

[0038] Take by weighing 1.48 kg of p-tert-butyltoluene and place it in a raw material storage tank, weigh 9.99 kg of water, 1.131 kg of p-tert-butyl benzoate, 114 g of p-tert-butyl benzyl alcohol, 0.103 g of auxiliary agent, 0.5 g of catalyst, and pro-oxidant Sodium percarbonate 0.069 kg is dissolved in the solvent storage tank, wherein the additives are 0.05 g of lithium p-tert-butylbenzoate, 0.0.5 g of potassium p-tert-butylbenzoate and 0.003 g of heavy alkylbenzenesulfonate, and the catalyst is 0.2 g of benzopyrazole aluminum complex and 0.3 g of benzopyridine copper complex are transported to the corresponding storage tank through the corresponding metering pump, and the temperature is raised to 60 °C through the heat exchanger. Internal collision, the micron-sized emulsion produced is transported to the bubble column reactor through the injector, and the injector entrains the oxygen and fresh oxygen at the top of the bubble reactor, and the oxidation reaction is carried ou...

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Abstract

The invention discloses a method for preparing p-tert-butylbenzaldehyde by carrying out liquid phase oxidation on p-tert-butyltoluene. The method comprises the following steps: (1) preheating p-tert-butyltoluene and a reaction solvent mixture, and then mixing in an impinging stream reactor to form micron-sized emulsion; (2) enabling the micron-sized emulsion to enter a bubbling tower reactor through an ejector and then react with oxygen to obtain a reaction feed liquid; (3) carrying out oil-water separation on the reaction feed liquid to obtain an oil phase and an aqueous phase; (4) separatingthe oil phase to obtain the product of p-tert-butylbenzaldehyde, wherein the reaction solvent mixture contains p-tert-butyl benzoate, p-tert-butyl benzyl alcohol, water, a catalyst, additives and a pro-oxidant. The method has the advantages of being high in selectivity to p-tert-butylbenzaldehyde and mild in reaction conditions, enabling the catalyst, the additives and the solvent to the recycled, and being green and pollution-free.

Description

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Claims

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Application Information

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Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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