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A method for producing hydrocarbon phase-change heat storage material with natural acid

A phase change heat storage, natural acid technology, applied in heat exchange materials, chemical instruments and methods, chemical recovery and other directions, can solve problems such as high cost, high operational risk, and complex process conditions

Active Publication Date: 2020-04-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can obtain the corresponding normal alkanes, there are certain problems in each method: as the first method, the process conditions are relatively complicated, and there are high requirements for certain equipment and materials; the second method requires ether Repeated solvent extraction; the third and fourth methods are dangerous and costly
However, these methods still have disadvantages such as low product yield and long production cycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The preparation process of the hydrogenation catalyst used in the present invention is as follows:

[0064] 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 Nanoport Co., Ltd.) were oxidized for 2.0h; then filtered, washed until neutral, and baked at 120°C dry; take the above oxidized carbon nanotubes, add 70mL water, and ultrasonically disperse; add H 2 PdC1 4 solution, stirred evenly, added formaldehyde solution, adjusted the pH value to 9 with 1M NaOH solution, stirred for 25min, filtered, washed with a large amount of water, and dried to obtain Pd / MwCNTs catalyst (Pd / MwCNTs).

[0065] Two catalysts were prepared according to the above method: catalyst 1 (4% palladium mass content) and catalyst 2 (7% palladium mass content).

Embodiment 2

[0067] This embodiment includes (A) hydrogenation, (B) sweating and (C) deployment three parts.

[0068] (A) Hydrogenation

[0069] This part includes hydrodeoxygenation of wax acid and hydrodeoxygenation of montanic acid.

[0070] (A1) Hydrodeoxygenation of cerotic acid

[0071] Add 1.5 parts of cerotic acid, 0.4 parts of Pd / MwCNTs catalyst 1 and 16 parts of n-hexane into the reaction kettle, and fill it with hydrogen (containing 10 μL / L of NH 3 ), the initial hydrogen pressure was 5.0MPa, stirring and heating were started, and the reaction was stopped after 7.0 hours at 240°C; the catalyst was separated by filtration.

[0072] The solvent n-hexane was distilled off at 80°C to obtain the hydrogenation product of cerotic acid.

[0073] Gas chromatography was used to quantitatively detect the hydrogenation products of cerotic acid. It can be seen that the conversion rate of cerotic acid was 80%, and the yield of the product n-hexacane was 97%.

[0074] (A2) Montan acid hydr...

Embodiment 3

[0115] This embodiment includes (A) hydrogenation, (B) sweating and (C) deployment three parts.

[0116] (A) Hydrogenation

[0117] With embodiment 2.

[0118] (B) sweating

[0119] This part includes (B1) sweating of cerotic acid hydrogenation products and (B2) sweating of montan acid hydrogenation products.

[0120] (B1) Hydrogenation product of cerotic acid sweats

[0121] This part includes: (1) preparation work, (2) crystallization, (3) sweating, (4) refining and other processes.

[0122] (1) Preparation

[0123] Prepare a number of stainless steel plates, each stainless steel plate has an external dimension of 0.98 m × 0.98 m × 0.02 m, and drill through holes of φ0.0015 m evenly distributed on the stainless steel plate (the hole is drilled at 0.01m from the edge, and the center of the hole Spacing 0.04m) (the pressure generated by each stainless steel plate is about 1.5kPa), spare.

[0124] Connect the sealing system of the sweating dish (same as Example 2) with the ...

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Abstract

The invention discloses a method for producing a hydrocarbon phase change heat storage material from natural acid. The method comprises the following steps: deoxidation of natural acid is carried out by hydrogenation; hydrogenated products are used for preparing n-alkanes with even carbon number by sweating, in a sweating process, air-flow passes through a wax layer for carrying liquid state component, and separating effect is enhanced and separating speed is accelerated; and n-alkanes with even carbon number are mixed in order to produce the hydrocarbon phase change heat storage material with high latent heat, and the material can continuously change between phase-transition temperature 58-63 DEG C. The method has the advantages of simple catalyst preparation, recycled usage, cheap solvent, low amount, and easy recovery and utilization; the sweating apparatus has the advantages of low investment, simple production process and low operation cost without solvent pollution for environments, high phase transition latent heat of the products, and the like.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a method for producing hydrocarbon phase-change thermal storage materials with natural acids. Background technique [0002] The world's energy supply is dominated by fossil fuels such as petroleum, natural gas, and coal. With the reduction of these non-renewable resource reserves and the environmental problems caused by the use of fossil fuels are becoming more and more serious, people are paying more and more attention to energy conservation and the use of solar energy. At the same time, with the development of society, people have higher and higher requirements for living comfort, which requires more energy consumption. [0003] At home and abroad, the research on the use of phase change heat storage materials (PCM, Phase Change Material for short) to store solar energy and low-cost electric energy is currently a very active field. These studies are based on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063Y02P20/584
Inventor 张志银孙剑锋吴颖张晓晖王鑫解利辉
Owner CHINA PETROLEUM & CHEM CORP