Method for producing a series of phase change wax products

A phase change wax and product technology, applied in chemical instruments and methods, petroleum wax refining, wax physical treatment, etc., can solve the problems of affecting the latent heat of phase change, small latent heat of phase change, etc., to reduce the difficulty of operation, low production cost, Lightweight effect

Active Publication Date: 2019-12-31
INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Fischer-Tropsch wax has a wide carbon number distribution range, and it is directly used as a phase-change wax material with a small phase-change latent heat and a wide phase-change interval. At the same time, a small amount of isoparaffins also affects the improvement of its phase-change latent heat.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using a low-temperature Fischer-Tropsch synthetic wax raw material, the Fischer-Tropsch refined wax is obtained by hydrotreating, with a freezing point of 45°C, an initial boiling point of 286°C, and a normal paraffin content of 95.3%.

[0029] Under the pressure of 1000Pa, the Fischer-Tropsch refined wax operates at a temperature of 140-150°C at the top of the tower, and separates a fraction at 280-300°C, with a melting point of 15±2.5°C and a phase change enthalpy of ≥170J / g; continue to increase the operating temperature of the rectification tower , the operating temperature at the top of the tower is 150-160°C, the separation is 300-315°C, the melting point is 20±2.5°C, the phase change enthalpy value is ≥170J / g; continue to increase the operating temperature of the rectification tower, the operating temperature at the top of the tower is 160-170°C, and the separation The fraction at 315-330°C is produced, the melting point is 25±2.5°C, and the phase change enthalpy ...

Embodiment 2

[0031] Using a Fischer-Tropsch synthetic wax as a raw material, the Fischer-Tropsch refined wax is obtained by hydrotreating, with a freezing point of 85°C and a normal paraffin content of 92.1%. After dilution with butanone and fractional crystallization and deoiling treatment, the normal paraffin content reaches 98.3% %.

[0032]The Fischer-Tropsch refined wax is under the pressure of 10Pa, the operating temperature at the top of the tower is 115-130°C, and a fraction of 350-375°C is separated, the melting point is 35±2.5°C, and the phase change enthalpy value is ≥180J / g; continue to increase the operating temperature of the rectifying tower , the operating temperature at the top of the tower is 130-145°C, the fraction at 375-400°C is separated, the melting point is 45±2.5°C, and the enthalpy of phase change is ≥190J / g; continue to increase the operating temperature of the rectification tower, the operating temperature at the top of the tower is 145-160°C, Separate the 400-4...

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Abstract

The invention discloses a method for producing a series of phase change wax products. The method comprises: refining a Fischer-Tropsch synthetic wax raw material through a hydrogenation reaction to obtain a Fischer-Tropsch refined wax; carrying out pressure reducing distillation on the Fischer-Tropsch refined wax; and separating continuous distillates with distillation range of 5-30 DEG C by continuously increasing the operation temperature to obtain a series of phase change wax products, wherein the pressure of the pressure reducing distillation is 0-1000 pa, the tower top operation temperature is 120-260 DEG C, and the phase change enthalpy value of the series of phase change wax products is larger than or equal to 170 J / g. According to the method of the invention, various trademark phase change wax products with the melting points of 5-80 DEG C can be separated from the Fischer-Tropsch refined wax, the carbon number of the products is concentrated, the enthalpy value is high, and the process is high in flexibility, can achieve customization according to needs, is low in production cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for producing a series of phase-change wax products. Background technique [0002] Phase change energy storage materials use the phase change process of materials to absorb heat (cold) from the environment or release heat (cold) to the environment, so as to achieve energy storage and release and adjust demand and supply mismatch. Phase change energy storage wax is one of the phase change energy storage materials, which can effectively avoid the overcooling and phase separation of inorganic phase change materials, and overcome the shortcomings of inorganic phase change materials that cannot be reused many times. Generally, phase change materials are required to have appropriate phase change temperature and large phase change latent heat. According to the temperature range of energy storage, phase change energy storage wax can be divided into high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C10G73/40C10G73/44
CPCC09K5/063C10G73/44C10G73/40C10G2300/1022C09K5/06C10G73/42C10G2300/304
Inventor 苗恒潘金亮李俊诚郑会月马国清周岩郭良兰
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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