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Method for applying LNG cold energy to butyl rubber synthesis

A technology of butyl rubber and cold energy, which is applied to the method of container discharge, equipment discharged from pressure vessels, pressure vessels, etc., to achieve high-grade cold energy utilization, easy operation and maintenance, and high cold energy utilization efficiency.

Active Publication Date: 2010-09-15
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of LNG cold energy in the synthesis of butyl rubber.

Method used

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  • Method for applying LNG cold energy to butyl rubber synthesis
  • Method for applying LNG cold energy to butyl rubber synthesis
  • Method for applying LNG cold energy to butyl rubber synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The basic LNG cold energy using ethane as the refrigerant is used in the synthesis refrigeration method and process of butyl rubber;

[0037] As attached in the manual figure 1 As shown, its methods mainly include:

[0038] LNG heat exchanger 1, gaseous refrigerant buffer tank 2, liquid refrigerant storage tank 3, flash tank A-4, flash tank B-5, catalyst heat exchanger 6, raw material heat exchanger 7, polymerization tank heat exchanger 8 , Air cooler 9, compressor 10.

[0039] Its workflow is:

[0040] The LNG and the gaseous ethane from the gaseous refrigerant buffer tank 2 exchange heat in the LNG heat exchanger 1 , the LNG is vaporized into NG and heated to normal temperature, and the gaseous ethane is directly condensed into a liquid state and then enters the liquid refrigerant storage tank 3 .

[0041] The liquid ethane in the liquid refrigerant storage tank 3 enters the flash tank A-4, the pressure is adjusted to -49KPa(G), and the temperature of the liquid et...

Embodiment 2

[0048] The basic LNG cold energy using ethylene as refrigerant is used in the synthetic refrigeration method and process of butyl rubber.

[0049] like figure 1 , its method equipment is the same as embodiment 1.

[0050] Its workflow is:

[0051] LNG and gaseous ethylene from the gaseous refrigerant buffer tank 2 exchange heat in the LNG heat exchanger 1, the LNG is vaporized into NG and heated to normal temperature, and the gaseous ethylene is directly condensed into a liquid state and enters the liquid refrigerant storage tank 3.

[0052] The liquid ethylene in the liquid refrigerant storage tank 3 enters the flash tank A-4, the pressure is adjusted to 24KPa(G), and the temperature of the liquid ethylene in the flash tank A-4 is controlled to be about -100°C.

[0053] Part of the liquid ethylene at -100°C in the flash tank A-4 enters the catalyst heat exchanger 6 at a controlled flow rate to cool the catalyst solution and return to the flash tank A-4 after being vaporized...

Embodiment 3

[0059] The improved and optimized LNG cold energy using ethylene as the refrigerant is used in the refrigeration method and process of butyl rubber synthesis;

[0060] See attached figure 2 , figure 2 On the basis of Example 2, the improved and optimized LNG cold energy is used in the refrigeration flow chart for butyl rubber synthesis. The difference from Example 2 is that the sensible heat of low-temperature gaseous ethylene is fully utilized when cooling the catalyst solution and mixing raw materials.

[0061] figure 2 In the flash tank A-4, gaseous ethylene at -100°C and part of liquid ethylene at -100°C control the flow rate and enter the catalyst heat exchanger 6 to cool the catalyst solution and then vaporize and heat up to slightly lower than the initial temperature of the catalyst solution. The gaseous ethylene, the catalyst The solution is cooled to the temperature required for the butyl rubber synthesis process;

[0062] Part of the liquid ethylene in the fla...

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Abstract

The invention relate to a system for synthesizing butyl rubber through LNG cold energy and a method thereof. The system is characterized in that the system comprises an LNG heat exchanger 1, a gaseous cold medium buffer tank 2, a liquid cold medium storage tank 3, a flash tank A-4, a flash tank B-5, a catalyst heat exchanger 6, a material heat exchanger 7, a polymerizer heat exchanger 8, an air temperature device 9 and a compressor 10; the method comprises the following steps: a cold medium such as ethane or ethene which meets the requirement of a butyl rubber synthesizing process and an LNG interface condition is selected; low-temperature cold energy contained in the LNG is permuted through the cold medium; and the low-temperature cold energy in the cold medium is used for cooling a catalyst solution and a mixed material and removing heat of polymerization reaction through corresponding heat exchange equipment so as to meet the requirements of the butyl rubber synthesizing process ontemperature and cold quantity.

Description

technical field [0001] The invention belongs to the technical field of energy, and relates to a method for synthesizing butyl rubber with LNG (liquefied natural gas) cold energy. This method replaces the high-grade cold energy released during the LNG vaporization process with a suitable refrigerant and uses it in the butyl rubber synthesis process, replacing the current large and complex propylene and ethylene cascade refrigeration system with high power consumption, and overcoming the current global butyl The energy consumption (electric energy, circulating water) of the refrigeration system of the rubber synthesis plant is too high. Background technique [0002] As a clean energy source, the global supply and demand of liquefied natural gas continues to grow rapidly. Since the natural gas resources in the world are concentrated in a few countries, it is necessary to purify the extracted natural gas in the natural gas producing area, and then liquefy it into -162°C low-tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/12F17C7/04
Inventor 蒋凌云张磊王洁江克忠张健时洁
Owner CHINA NAT OFFSHORE OIL CORP
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