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Dehydration composition, preparation method and applications thereof

A technology of composition and chelating agent, which is applied in the field of dehydration composition and its preparation, and can solve problems such as corrosion

Inactive Publication Date: 2020-04-17
NOVASHIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the regenerated glycol contains a certain amount of methyl chloride. Due to the hydrolysis of methyl chloride at high temperature to produce HCl, the regeneration system of methyl chloride glycol dehydration will have corrosion problems during the operation of the equipment.

Method used

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  • Dehydration composition, preparation method and applications thereof
  • Dehydration composition, preparation method and applications thereof
  • Dehydration composition, preparation method and applications thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0051] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0052] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

Embodiment 1 and comparative example 1

[0054] By each component shown in following table 1, prepare dehydration composition, will test its dehydration ability by the method for test example 1, and test the dehydration composition that needs regeneration by the test method of test example 2 to iron specimen The corrosion conditions are shown in Table 2.

[0055] Polyether polyol polyether 330 is commercial product HSH330 (from Jiangsu Haian Petrochemical Plant).

[0056] Table 1

[0057]

[0058] *: multi-component chelating agent mixture, the weight ratio of each component is 1

Embodiment 2

[0077] Water-containing methyl chloride (among them, containing 0.2% water, 95% methyl chloride, and 4.8% isobutylene) 529.2kg / hr, pressure 430kPa, temperature 22°C, enters the absorption tower from the bottom of the tower, and 50kg is added to the top of the absorption tower with 5 trays The dehydration composition with / hr number 7 has a pressure of 430 kPa and a temperature of 22°C. 484.6 kg / hr of methyl chloride containing 60 ppm of water is discharged from the top of the absorption tower.

[0078] The dehydration composition to be regenerated is discharged from the bottom of the absorption tower at 94.6kg / hr, containing 1.1% water and 42% methyl chloride. The dehydration composition containing water and methyl chloride discharged from the bottom of the tower is regenerated through flash dechlorination, rectification and dehydration to reduce the moisture in the dehydration composition to below 0.2%, and the regenerated dehydration composition is returned to the dehydratio...

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Abstract

The invention provides a dehydration composition, a preparation method and applications thereof. The dehydration composition comprises the following components: (1) diol and / or glycerol; (2) an alkalimetal salt; (3) alkylol amine; (4) an iron ion chelating agent; and (5) polyether polyol. The dehydration composition can well realize dehydration treatment of a to-be-treated system; and in a regeneration process of the dehydration composition, the diol and / or glycerol, the alkali metal salt, the iron ion chelating agent, the alkylol amine and the polyether polyol are added into the system, so that the corrosion to equipment can be obviously inhibited while the consumption of the dehydration composition in the regeneration process is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of dehydrating compositions, and in particular relates to a dehydrating composition and its preparation method and application. Background technique [0002] The moisture content in natural gas is one of the important criteria of natural gas quality. If the saturated water content in the natural gas is too high, the pipeline transportation capacity will be reduced. At the same time, due to the change of the transportation pressure and the surrounding environment, the hydrate and acidic substances formed in the natural gas will also corrode the pipeline, and even cause the burner of the user's gas heating furnace to be damaged. Flame out, there is a serious safety hazard. Therefore, natural gas dehydration is an important process requirement in the process of natural gas production and transportation. [0003] The triethylene glycol dehydration process is widely used in natural gas dehydration at home and a...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/26C07D303/04C07D301/32C07C7/11C07C11/04C07C11/06
CPCB01D53/1493B01D53/263B01D2252/202B01D2252/2023B01D2252/20478B01D2256/245C07C7/11C07D301/32C07D303/04C10L3/106C07C11/04C07C11/06Y02P20/151
Inventor 朱荣欣汪帆杨建春
Owner NOVASHIN CO LTD
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