Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

a cryogenic liquid medium

A low-temperature liquid and medium technology, applied in the field of low temperature, can solve the problems of easy volatilization, high viscosity, no product, etc., and achieve the effect of difficult volatilization and low boiling point under normal pressure

Active Publication Date: 2020-09-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although methane, ethane, propane, butane, R124, R22, R32 and other substances have a very low triple point, they can exist in liquid form at -150°C or even -180°C. Volatile; methanol, ethanol, propanol and other commonly used constant temperature bath media have high boiling points and are not easy to volatilize, but limited by the triple point, the viscosity is extremely high at around -110°C, which is difficult and cannot guarantee the uniform temperature requirements of the constant temperature bath
Therefore, although there is a wide range of constant temperature requirements (such as temperature calibration) for the temperature range of -110°C and below, due to the lack of liquid media, there are still no related products on the market

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a cryogenic liquid medium
  • a cryogenic liquid medium
  • a cryogenic liquid medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 is applicable to a kind of liquid medium of -140 ℃

[0043] see figure 1 , is a schematic diagram of realizing the eutectic temperature of the low temperature medium provided in Example 1 of the present invention. In this embodiment, the cryogenic medium adopts a binary mixture in an alkane composition, mixing ethylcyclopentane and isohexane in a certain proportion, when the proportion of ethylcyclopentane does not exceed 50% (molar ratio) , the mixture of the two can achieve a solid-liquid phase transition temperature lower than their respective triple points, so it can be used as a liquid medium in a lower temperature region, especially when the molar ratio of ethylcyclopentane to isohexane is 0.314:0.686 Optimum, the eutectic temperature of the lowest temperature -160.1°C can be realized, and at this optimal ratio, the liquid medium requirement of -140°C can be met.

Embodiment 2

[0044] Embodiment 2 is applicable to a kind of liquid medium of -150 ℃

[0045] see figure 2 , is a schematic diagram of realizing the eutectic temperature of the low temperature medium provided in Example 2 of the present invention. , in this embodiment, the cryogenic medium uses a binary mixture of an alkane composition and an olefin composition, and isohexane and 4-methyl-1-pentene are mixed in a certain proportion, almost in any proportion, the two The mixture can realize the solid-liquid phase transition temperature lower than their respective triple points, so it can be used as a liquid medium in a lower temperature region, especially when the molar ratio of isohexane to 4-methyl-1-pentene is 0.418:0.582 It is optimal at the time, and the eutectic temperature with the lowest temperature of -169.3°C can be achieved. Under this optimal ratio, it can meet the requirements of liquid medium at -150°C.

Embodiment 3

[0046] Embodiment 3 is applicable to a kind of liquid medium of -150 ℃

[0047] see image 3 , is a schematic diagram of realizing the eutectic temperature of the low temperature medium provided in Example 3 of the present invention. In this example, the low-temperature medium uses a binary mixture of olefinic compositions, mixing 4-methyl-1-pentene and 2,3-dimethyl-1-butene in a certain proportion, almost at any ratio, the mixture of the two can achieve a solid-liquid phase transition temperature lower than their respective triple points, so it can be used as a liquid medium in a lower temperature region, especially, between 4-methyl-1-pentene and 2,3 - The optimum molar ratio of dimethyl-1-butene is 0.529:0.471, which can achieve the lowest eutectic temperature of -171.7°C. Under this optimal ratio, it can meet the requirements of liquid medium at -150°C.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The cryogenic liquid medium provided by the present invention includes at least one of an alkane composition, an olefin composition, an alcohol composition and an ether composition, and each of the alkane composition, the olefin composition, the alcohol combination and the ether composition includes a corresponding non-toxic and harmless substance having a melting point lower than −110° C. and a standard boiling point higher than 50° C. Since the cryogenic liquid medium is formed by the non-toxic and harmless single substance having the melting point lower than −110° C. and the standard boiling point higher than 50° C. or a binary, ternary and multi-component mixture thereof, the cryogenic liquid medium has a lower atmospheric boiling point, and is difficult to volatilize. The eutectic crystal of the specific mixture can be used to achieve the liquid requirements of low temperature, especially the temperature below −110° C.

Description

technical field [0001] The invention relates to the field of low temperature technology, in particular to a low temperature liquid medium. Background technique [0002] The constant temperature liquid bath is widely used in the fields of petroleum, chemical industry, electronic instrumentation, physics, chemistry, bioengineering, medicine and health, life science, light industry food, physical property testing and chemical analysis, etc., providing a field with controlled heat and cold, uniform and constant temperature It can also be used as a heat source or cold source for direct heating or cooling and auxiliary heating or cooling. Due to the high density and high heat capacity of liquid, it is easier to achieve higher constant temperature accuracy than air or other gas baths, and it is less susceptible to environmental interference, so constant temperature liquid baths are more widely used than gas baths. [0003] Patent ZL96244411.1, patent CN201320651525.2, patent CN200...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/10
CPCC09K5/10C09K5/04C09K5/066
Inventor 公茂琼赵延兴董学强
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com