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Preparation method of wax medium used for temperature control valves

A technology of wax medium and temperature control valve, applied in the preparation of wax medium for heating temperature control valve, in the field of wax medium for heating temperature control valve, to achieve the effect of flexible process operation, simple preparation and low reaction temperature

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also various deficiencies in the preparation of wax media by chemical synthesis processes.

Method used

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  • Preparation method of wax medium used for temperature control valves
  • Preparation method of wax medium used for temperature control valves

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Catalyst preparation

[0031] 6M HNO in an 80°C oil bath 3 Multi-walled carbon nanotubes (commercially available, purity>95%, diameter 40-60nm, length 5-15μm, provided by Shenzhen Nanometer Harbor Co., Ltd.) were oxidized for 2h; then filtered, washed until neutral, and dried at 120°C ; Take the above-mentioned oxidized carbon nanotubes, add 70mL of water, and ultrasonically disperse them; 2 PdC1 4 solution, stirred evenly, added formaldehyde solution, adjusted the pH value to 9 with 1M NaOH solution, stirred for 25 minutes, filtered, washed with a large amount of water, and dried to obtain Pd / multi-walled carbon nanotube catalyst (Pd / MwCNTs).

[0032] Two catalysts were prepared according to the above method: catalyst 1 (4% palladium mass content) and catalyst 2 (7% palladium mass content).

[0033] (2) Myristic acid hydrogenation to prepare n-tetradecane

[0034] Add 2.0 parts (parts by volume, the same below) of myristic acid, 0.5 parts of Pd / MwCNTs catalyst 2 ...

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Abstract

The invention relates to a preparation method of a wax medium used for temperature control valves. According to the preparation method, myristic acid, palmitic acid, and stearic acid are taken as raw materials, and are subjected to hydrogenation reaction in the presence of a catalyst and hydrogen respectively so as to obtain high purity n-tetradecane, n-hexadecath, and n-octadecane; and the n-alkanes are mixed according to equal weight ratios so as to obtain a target product. The temperature control valves prepared using the wax medium is capable of realizing temperature control in a temperature range of 5 to 30 DEG C, and increasing value of each degree is almost the same. The wax medium can be used for wax automatic temperature control devices with uniform increasing values, and especially used as a medium of wax temperature control valves.

Description

technical field [0001] The invention belongs to the technical field of special waxes, and in particular relates to a wax medium for a heating temperature control valve, in particular to a preparation method of a wax medium for a heating temperature control valve. Background technique [0002] With the development of society, people's requirements for living comfort are getting higher and higher, which requires more energy consumption. At present, the world's energy supply is dominated by fossil fuels such as oil, natural gas, and coal. With the reduction of these non-renewable resource reserves, the price continues to rise; and the environmental problems caused by the use of these fossil fuels are becoming more and more serious. Therefore, the use of energy-saving products received widespread attention. In the winter heating period, it is imperative to implement central heating to reduce air pollution. However, the contradiction between the low proportion of heating fees c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C07C1/22C07C9/15C07C9/22B01J23/44
Inventor 孙剑锋张志银张造根姚春雷王立言高蒿
Owner CHINA PETROLEUM & CHEM CORP