High-temperature phase-change wax and preparation method thereof

A high-temperature phase change and wax-supporting technology, applied in the field of phase change energy storage, can solve problems such as no related reports, achieve the effects of improving product quality and yield, facilitating separation, and reducing operating costs

Active Publication Date: 2019-07-09
INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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Problems solved by technology

[0007] To sum up, the current domestic phase change wax products are mainly low-grade phase-change waxes (melting point lower than 80°C), low-grade phase-change waxes are mainly produced from petroleum wax and coal-based Fischer-Tropsch wax, and high-grade p

Method used

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  • High-temperature phase-change wax and preparation method thereof

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preparation example Construction

[0029] A preparation method of high-temperature phase-change wax, comprising:

[0030] Step 1: Use coal-based Fischer-Tropsch wax as raw material to carry out hydrogenation refining, and use a small amount of olefins in saturated Fischer-Tropsch wax, a small amount of oxygen-containing organic compounds in hydrogenation reduction Fischer-Tropsch synthetic wax and hydrogenation fracture Fischer-Tropsch synthetic wax A small amount of polycyclic hydrocarbons. If these substances are not removed, on the one hand, they will affect the chromaticity of the Fischer-Tropsch synthetic wax, and on the other hand, it is easy to cause coking and carbon deposition in subsequent processing, thereby affecting product quality and normal production.

[0031] Step 2: After preheating the refined wax obtained in step 1, perform pre-short-path distillation cutting to remove light fractions. Due to the wide distillation range of Fischer-Tropsch wax and the large proportion of heavy components, ord...

Embodiment 1

[0048] Coal-based Fischer-Tropsch wax obtained by Fischer-Tropsch synthesis process is used as raw material, and Fischer-Tropsch refined wax is obtained through hydrogenation refining. The hydrogenation temperature is 260-300°C and the operating pressure is 5-8Mpa.

[0049] Such as figure 1 As shown, the coal-based Fischer-Tropsch refined wax is preheated to 110°C in the raw material tank, and sent to the first molecular evaporator at a feed rate of 6kg / h for pre-short-path distillation. The temperature of the first evaporator is controlled at 195°C , pressure 45pa, the first evaporator removes light components 650°C distillate section.

[0050] The 400-650°C distillate section is used as the raw material, and the second-stage short-path distillation is carried out in the second evaporator, the temperature is controlled at 305°C, and the pressure is 0.3pa to obtain the 400-600°C and 600-650°C distillate section, of which 600-650 The ℃ distillate section is refined to obtain a...

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Abstract

The invention discloses high-temperature phase-change wax and a preparation method thereof. The preparation method comprises the following steps: carrying out hydrofining by taking coal-based Fischer-Tropsch wax as a raw material to obtain Fischer-Tropsch refined wax; preheating the refined wax, carrying out pre-short-path distillation cutting, and cutting off light fractions; cutting the residualcomponents obtained in the previous step through multistage short-range distillation cutting, and reducing the temperature and/or the vacuum degree step by step, and enabling light fractions obtainedthrough current-stage short-range distillation to enter a next-stage short-range distillation for separation; and respectively refining a plurality of heavy fractions with boiling points of 500-650 DEG C and a boiling range of 40-60 DEG C remained in each stage of short-range distillation under normal pressure to obtain the high-temperature phase-change wax. The melting point of the high-temperature phase-change wax prepared by the preparation method is 80-100 DEG C, and the enthalpy value is greater than 210 J/g. The production process is simple, the product yield is relatively high, industrial production can be realized, and the high-temperature phase-change wax product can be produced.

Description

technical field [0001] The invention relates to the technical field of phase-change energy storage, in particular to a high-temperature phase-change wax and a preparation method thereof. Background technique [0002] With the continuous development of human society and economy and the massive consumption of energy, energy conservation and environmental protection have become a topic of global concern. The development and utilization of new energy and the improvement of energy utilization efficiency have become the focus of research and development in various countries. Phase change energy storage technology can solve the contradiction of energy supply imbalance in time and space, improve energy utilization and protect the environment. 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 misma...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 李俊诚潘金亮苗恒郑会月郭良兰葛建林周岩林强马国清
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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