Temerature sensitive medium for wax temperature controlling valve and its prepn process

A temperature control valve and temperature sensitive technology, which is applied in the preparation of waxy temperature sensitive medium for heating temperature control valve, and the field of temperature sensitive medium for wax quality temperature control valve, can solve the problem that there is no technical disclosure, no performance and suitable for heating temperature control. Wax temperature-sensitive materials and other issues, to achieve good use effect, reduce production costs, and stabilize product performance.

Active Publication Date: 2005-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Waxy temperature-sensitive media have been widely used in some fields, but there is no technology disclosure in heating and temperature control. The main reason is that there is no waxy temperature-sensitive material with suitable performance.

Method used

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  • Temerature sensitive medium for wax temperature controlling valve and its prepn process
  • Temerature sensitive medium for wax temperature controlling valve and its prepn process
  • Temerature sensitive medium for wax temperature controlling valve and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) With liquid paraffin as raw material, in a distillation unit with 17 theoretical plates, at 1.33 × 10 3 Under the pressure of Pa, the fractions of 260-340°C were prepared at intervals of 5°C, and the melting points of the fractions were shown in Table 1;

[0020] Each vacuum distillation product melting point of table 1

[0021] Fraction range Melting point of vacuum distillation product Fraction range Melting point of vacuum distillation product

[0022] ℃ ℃ ℃ ℃

[0023] 260~265 5.0 300~305 20.9

[0024] 265~270 6.9 305~310 23.8

[0025] 270~275 9.0 310~315 25.5

[0026] 275~280 11.0 315~320 27.0

[0027] 280~285 13.0 320~325 28.4

[0028] 285~290 15.1 325~330 29.6

[0029] 290~295 17.1 330~335 30.6

[0030] 295~300 19.0 335~340 31.8

[0031] (2) the above-mentioned components and raw material liquid paraffin purified by vacuum distillation are respectively 0.3, 0.2, 0.1, 0.1, 0, 0, 0, 0, 0, 0, 0, 0, 0.1, Sampling at the ratio of 0.1, 0...

Embodiment 2

[0035] (1) Using liquid paraffin as a raw material, in a distillation device with 17 theoretical plates, under a pressure of 1.33×103Pa, a fraction of 260 to 300°C is prepared at an interval of 10°C; Wax (melting point 42.5 DEG C) is the fraction of 300~340 DEG C prepared as raw material, and the melting point of each segment fraction product is as shown in Table 2;

[0036] Table 2 Vacuum distillation of each component - sweating product melting point

[0037] Fraction range Melting point of vacuum distillation product Fraction range Melting point of vacuum distillation product

[0038] ℃ ℃ ℃ ℃

[0039] 260~270 6.2 300~310 22.1

[0040] 270~280 10.1 310~320 26.5

[0041] 280~290 14.1 320~330 29.2

[0042] 290~300 18.0 330~340 31.5

[0043] (2) The above-mentioned components purified by vacuum distillation and the raw material liquid paraffin are sampled in proportions of 0.4, 0.1, 0.1, 0, 0, 0.1, 0.1, 0.4, 1.0 in parts by weight, and heated and melted, m...

Embodiment 3

[0047] (1) With liquid paraffin as raw material, in a distillation unit with 17 theoretical plates, at 1.33 × 10 3 Under the pressure of Pa, prepare fractions at 260-300°C at intervals of 20°C; under the same distillation conditions, prepare fractions at 300-340°C with minus-line wax paste as the raw material, and the melting points of the products of each fraction are shown in Table 3;

[0048] (2) Sweat and purify the 300-340°C fraction prepared from the above-mentioned minus-line wax paste as the raw material, and take its melting point as the end point temperature, and the melting points of each purified component are shown in Table 3;

[0049] (3) the above-mentioned components and raw material liquid paraffin purified by vacuum distillation and sweating are sampled in proportions of 0.6, 0.1, 0.1, 0.6, 1.0 in parts by weight, heated and melted, and mixed uniformly;

[0050] (4) Add 4% activated clay to the above mixed components at 130° C., mix for 0.5 hours and then filte...

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PUM

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Abstract

The present invention is temperature sensitive medium for wax temperature controlling valve and its preparation process. The destination product is prepared with liquid paraffin containing C9-C20 components, cerate or other material and through decompression distillation, mixing, refining and other steps. During the mixing, partial commercial wax may be added to lower the production cost. The wax temperature controlling valve with the product of the present invention may be used in controlling temperature in 5-30 deg.c with the basically the same stroke each degree. The product of the present invention may be used in automatic temperature controlling device requiring homogeneous stroke, especially in heating temperature controlling valve.

Description

technical field [0001] The invention belongs to the technical field of special waxes, in particular to a wax temperature-sensitive medium for a temperature control valve, in particular to a preparation method for a wax temperature-sensitive medium for a heating temperature control valve. Background technique [0002] The temperature control valve using wax as the temperature-sensitive medium is a self-operated valve, which uses the volume change of the wax temperature-sensitive medium during the phase transition to control the opening of the valve so as to achieve the purpose of controlling the flow of the material flow. It has the functions of induction, Execution, feedback, fixed value and other functions. This kind of temperature control valve has the advantages of no significant change in temperature characteristics with system pressure, high mechanical strength, good chemical stability, easy mass production and installation, low cost, stable and reliable temperature con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 孙剑锋孟淑香张晓萍高蒿
Owner CHINA PETROLEUM & CHEM CORP
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