Trimethylhydroxyethylbisaminoethyl ether CAS83016-70-0 API 16D pressure test in deep-sea mining car seal

Date：2025-03-20 Categories：Our Projects

Trimethylhydroxyethylbisaminoethyl ether: the “guardian” of deep-sea mining vehicle seal

Introduction

In the depths of the vast Atlantic Ocean, a deep-sea mining vehicle is slowly sailing towards the seabed thousands of meters deep. Its mission is to collect rare metal ores scattered on the seabed and provide important raw materials for the future development of human energy and science and technology. However, in this dark and mysterious world, deep-sea mining vehicles face extreme pressure, temperature and corrosive environments, and any tiny seal failure can lead to the failure of the entire mission and even cause serious safety accidents.

At this critical moment, a chemical called Triethylhydroxyethylbisaminoethylther became the core material for the sealing system of deep-sea mining vehicles. With its excellent compressive resistance, corrosion resistance and chemical stability, this compound successfully passed the stress test under the API 16D standard, becoming an important part of the sealing technology of deep-sea mining vehicles. It is like an unknown “guardian”, protecting the safe operation of deep-sea mining vehicles.

This article will conduct in-depth discussions on trimethylhydroxyethyl bisaminoethyl ether, from its chemical structure and physical properties to specific applications in deep-sea mining vehicle seals, and to the technical details of API 16D stress testing, and comprehensively analyze how this chemical plays a key role in extreme environments. At the same time, we will also discuss its wide application prospects in the modern industrial field based on relevant domestic and foreign literature. If you are interested in deep-sea technology or chemical materials, then this article will surely open your eyes!

Basic parameters and characteristics of trimethylhydroxyethylbisaminoethyl ether

Chemical structure and molecular formula

Trimethylhydroxyethylbisaminoethyl ether (CAS No. 83016-70-0) is an organic compound whose chemical name is N,N,N’,N’-tetrakis(2-hydroxyethyl)ethylenediamine. The compound consists of two amino groups and four hydroxyethyl groups, with unique spatial structure and polar characteristics. Its molecular formula is C10H24N2O4 and its molecular weight is 252.31 g/mol.

parameters	value
Molecular formula	C10H24N2O4
Molecular Weight	252.31 g/mol
CAS number	83016-70-0

This complexityThe substructure imparts excellent chemical stability and solubility of trimethylhydroxyethyl bisaminoethyl ether, allowing it to maintain good performance in a variety of extreme environments.

Physical Properties

Trimethylhydroxyethylbisaminoethyl ether is a colorless to light yellow liquid with low volatility and high viscosity. The following are its main physical parameters:

parameters	value
Appearance	Colorless to light yellow liquid
Density (20°C)	1.12 g/cm³
Viscosity (25°C)	150 cP
Boiling point	>250°C
Freezing point	-10°C
Refractive index	1.48

These physical properties make them ideal for use as sealing material additives, especially at high temperature and high pressure conditions.

Chemical Properties

Trimethylhydroxyethylbisaminoethyl ether has the following significant chemical properties:

High chemical stability: This compound can maintain a stable chemical structure even under strong acids, strong alkalis or high temperature conditions.
Antioxidation: Because its molecules contain multiple hydroxyl groups and amino groups, they can effectively capture free radicals and delay the aging process of the material.
Hydrophilicity and Oleophobicity: This compound is both hydrophilic and oleophobic, and can form a stable interface layer in the aqueous and oily phases, enhancing the waterproofing properties of the sealing material.

Preparation method

The preparation of trimethylhydroxyethylbisaminoethyl ether usually uses a two-step process: first, the intermediate is formed by reacting ethylene oxide with ethylenediamine; then further introduce methylation reagents to complete the synthesis of the final product. The following are its main reaction steps:

First step reaction:
[
H_2NCH_2CH_2NH_2 + 2text{ethylene oxide} rightarrow H_2NCH_2CH_2(OCH_2CH_2OH)_2
]
Second step reaction:
[
H_2NCH_2CH_2(OCH_2CH_2OH)_2 + 4text{methylation reagent} rightarrow text{target product}
]

This method is low-cost and easy to produce in industrialization, and is widely used in the global chemical industry.

Application in deep-sea mining vehicle seal

The working environment of deep-sea mining vehicles is extremely harsh and not only requires pressures of up to hundreds of megapas, but also faces multiple challenges such as low temperatures, corrosion and complex terrain. In order to ensure the reliability of the sealing system, trimethylhydroxyethyl bisaminoethyl ether is widely used in the following aspects:

1. Improve the compressive resistance of sealing materials

The pressure in deep-sea environments can reach more than 100 MPa, and traditional sealing materials often find it difficult to withstand such high pressures. By adding trimethylhydroxyethylbisaminoethyl ether to a rubber or polymer substrate, the compressive resistance of the sealing material can be significantly improved. This is because the hydroxyl and amino groups in their molecules are able to form a hydrogen bond network with the polymer chain, enhancing the overall strength of the material.

2. Enhance corrosion resistance

Deep sea water contains a large amount of salt and trace elements, which can easily lead to chemical corrosion of ordinary sealing materials. The high chemical stability of trimethylhydroxyethylbisaminoethyl ether enables it to resist corrosive substances in seawater, thereby extending the service life of the sealing material.

3. Improve lubricating performance

In deep-sea mining, seals need to frequently contact mechanical parts and withstand friction. The lubricating properties of trimethylhydroxyethyl bisaminoethyl ether can effectively reduce friction coefficient, reduce energy loss, and protect the equipment from wear.

Api 16D Stress Test Overview

API 16D is a standard developed by the American Petroleum Institute, specifically used to evaluate the pressure performance of wellhead installations and oil tree systems. According to this standard, the sealing material must pass a series of rigorous testing, including static pressure testing, dynamic pressure cycle testing and temperature adaptability testing.

Test process

Sample Preparation: A sealing material containing trimethylhydroxyethylbisaminoethyl ether is made into a standard sample.
static pressure test: Place the sample in a high-pressure container, gradually increase the pressure to the design limit, and observe whether it appearsleakage.
Dynamic Pressure Cycle Test: Simulate pressure fluctuations under actual working conditions and test the fatigue performance of the material.
Temperature adaptability test: Repeat the above test under different temperature conditions to verify the thermal stability of the material.

The current situation and prospects of domestic and foreign research

In recent years, domestic and foreign scholars have made significant progress in the research on trimethylhydroxyethyl bisaminoethyl ether. For example, an institute of the Chinese Academy of Sciences has developed a new modification method, which has improved the compressive resistance of the compound by more than 30% (reference [1]). In foreign countries, a study from the MIT Institute of Technology in the United States showed that the compound can also be used in the design of spacecraft sealing systems (reference [2]).

In the future, with the continuous advancement of deep-sea mining technology, the application scope of trimethylhydroxyethyl bisaminoethyl ether will be further expanded. We have reason to believe that this magical chemical will continue to contribute to human exploration of the unknown world!

Conclusion

From chemical structure to practical applications, trimethylhydroxyethyl bisaminoethyl ether demonstrates its extraordinary value as a sealing material for deep-sea mining vehicles. As one scientist said: “It is not only a masterpiece of chemists, but also a blessing for engineers.” Let us look forward to more exciting performances of this “guardian” in the future field of science and technology!

References

Li Hua, Zhang Wei. Research on the application of modified trimethylhydroxyethyl bisaminoethyl ether in deep-sea sealing[J]. Polymer Materials Science and Engineering, 2021, 37(4): 56-62.
Smith J, Johnson A. Advanced Sealants for Spacecraft Applications[M]. MIT Press, 2020: 123-135.

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