A kind of process device and method for preparing acetal by monoalcohol-air catalytic conversion

A technology of catalytic conversion and process equipment, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as inability to quickly and accurately control production conditions, inability to continue industrial production, and high risk of safety and environmental protection. Achieve fast and precise control of production conditions, facilitate raw material intake, and facilitate production conditions

Active Publication Date: 2019-11-19
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a process device for producing acetal by monoalcohol-air catalytic conversion, which solves the problem of large investment, high production cost and high energy consumption in the prior art when monohydric alcohol-air catalytic conversion is used to produce acetal. The conversion efficiency is low, the risk of safety and environmental protection is high, the production conditions cannot be controlled quickly and accurately, and the continuous industrial production cannot be carried out.

Method used

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  • A kind of process device and method for preparing acetal by monoalcohol-air catalytic conversion
  • A kind of process device and method for preparing acetal by monoalcohol-air catalytic conversion
  • A kind of process device and method for preparing acetal by monoalcohol-air catalytic conversion

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Embodiment 1

[0041] as attached figure 1 As shown, this embodiment provides a monohydric alcohol-air catalytic conversion process device for preparing acetal, which has a simple structure, scientific design, easy operation, can effectively reduce device investment, production cost and energy consumption, is safe and environmentally friendly, and has high conversion efficiency , and at the same time facilitate rapid and precise control of production conditions, enabling continuous industrial production. The monoalcohol-air catalytic conversion process device for preparing acetal includes a feed system, a heating and mixing system, a catalytic conversion system, a condensation system and a gas-liquid separation system.

[0042] Described feeding system comprises the raw material tank 5 that dresses monohydric alcohol liquid, the reciprocating metering pump 7 that is connected with the outlet pipeline of described raw material tank 5, is used to produce the air generating device 1 of air and ...

Embodiment 2

[0053] This embodiment provides the method for producing acetal by monoalcohol-air catalytic conversion of the present invention, which is carried out by using the process device in Example 1, and specifically includes the following steps:

[0054] With analytically pure methanol as the monoalcohol raw material, with air as the mixture of oxidizing gas and diluent gas, the methanol feed rate of the reciprocating metering pump 7 is set to 5.0mL / h, the outlet pressure of the air generating device 1 is 0.53MPa, and the mass The air flow rate of flow meter 2 is 1.96L / h;

[0055] Methanol from the reciprocating metering pump 7 enters the liquid preheater 9, and after the tail gas reacts with the reactor 15 for heat exchange and preheating, it is further heated through the liquid preheating pipeline 34 and enters the gas-liquid mixing preheating pipeline 35, After the air from the mass flow meter 2 is heated by the gas preheater 4, it is further heated through the gas preheating pip...

Embodiment 3

[0070] This embodiment provides the method for producing acetal by monoalcohol-air catalytic conversion of the present invention, which is carried out by using the process device in Example 1, and specifically includes the following steps:

[0071] With analytical pure ethanol as the monoalcohol raw material, with air as the mixture of oxidizing gas and diluent gas, the ethanol feed rate of the reciprocating metering pump 7 is set to 7.5mL / h, the outlet pressure of the air generating device 1 is 3.0MPa, the mass The air flow rate of flowmeter 2 is 8.30L / h;

[0072] The ethanol from the reciprocating metering pump 7 enters the liquid preheater 9, and after the tail gas reacts with the reactor 15 for heat exchange and preheating, it is further heated through the liquid preheating pipeline 34 and enters the gas-liquid mixing preheating pipeline 35, After the air from the mass flow meter 2 is heated by the gas preheater 4, it is further heated through the gas preheating pipeline 1...

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Abstract

Disclosed by the present invention are a processing system and method for preparing an acetal by using monohydric alcohol-air catalytic conversion, which solves the problems in the existing technology wherein costs are high, safety and environmental protection risks are high, conversion efficiency is low, fast and precise control of production conditions is not possible, and continuous industrial chemical production is not possible. The feeding system of the present invention comprises a raw material tank, a reciprocating metering pump, an air generating device, and a mass flow meter; a heating mixing system comprises a gas pre-heater, a liquid pre-heater, a gas pre-heating pipe, a liquid pre-heating pipe, a gas-liquid mixed pre-heating pipe, a vaporization mixer, and a overheating pipe; a catalytic conversion system comprises a fixed bed catalytic reactor; a condensing system comprises a deep cooler and a circulating refrigerator; a gas-liquid separation system comprises a gas-liquid separation tower, a product tank and a wet flow meter. A monohydric alcohol and air enter the heating mixing system by means of the feeding system and are heated and mixed, then entering the catalytic conversion system to react, a reaction tail gas being condensed by means of the condensing system and being separated by means of the gas-liquid separation system to obtain a liquid product containing the acetal.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a process device and method for preparing acetal by monoalcohol-air catalytic conversion. Background technique [0002] Catalytic oxidation of monohydric alcohols can produce compounds with higher added value such as acetals. Methanol is an important basic chemical raw material. In the past 20 years, with the introduction of the policy and layout of the country to encourage the development of the coal chemical industry and the improvement of methanol production technology, a large number of large-scale methanol production devices have been launched, and the methanol production capacity has grown rapidly. As an important basic chemical raw material and product, due to insufficient development of its downstream products, methanol production has serious overcapacity. At present, my country's methanol production capacity may be as high as 81 million tons, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/56C07C43/30C07C43/303
CPCC07C41/56C07C43/30C07C43/303
Inventor 程金燮王科胡志彪凌华招黄宏徐晓峰温春辉李倩
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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