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Organosilicon-based solvent for removing carbon dioxide from flue gas, and process thereof

A technology based on carbon dioxide and organosilicon, applied in air quality improvement, chemical instruments and methods, and separation of dispersed particles, can solve problems such as increased regeneration energy consumption, increased solvent viscosity, and increased total reaction heat, and achieve low raw material Effects of cost, low regeneration energy consumption, and high CO2 absorption capacity

Inactive Publication Date: 2017-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in order to obtain low volatility, the decarburization solvent generally has a relatively high molecular weight, and high molecular weight will lead to an increase in the viscosity of the solvent. In order to obtain high CO under low pressure conditions 2 absorbing capacity, the absorption of CO 2 The total heat of reaction increases correspondingly, which will inevitably increase the regeneration energy consumption

Method used

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  • Organosilicon-based solvent for removing carbon dioxide from flue gas, and process thereof
  • Organosilicon-based solvent for removing carbon dioxide from flue gas, and process thereof
  • Organosilicon-based solvent for removing carbon dioxide from flue gas, and process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve divinyltetramethylsiloxane (50 g) in 200 mL CHCl 3 , into a three-necked flask equipped with a magnetic stir bar. The reaction flask was placed in ice water, kept at 0 °C, m-chloroperoxybenzoic acid (150 g) was dissolved in 1 L CHCl 3 After filtration, the filtrate was slowly added dropwise to the reaction flask for 1.5 h, and the reaction solution was stirred overnight. 2 L of 5% Na for the reaction solution 2 CO 3 Extract the organic layer with anhydrous MgSO 4 After drying, it was filtered and concentrated under reduced pressure. Add hexane, filter off the residual m-chloroperoxybenzoic acid, and cool the filtrate at low temperature to obtain tetramethylsiloxane whose end group is a dioxirane group.

[0033] Dissolve oxirane-terminated tetramethylsiloxane (10 g) in 100 mL of anhydrous tetrahydrofuran, add dropwise ethylenediamine (20 g) in 100 mL of anhydrous tetrahydrofuran solution, dropwise for 1 h, and react the solution in Reflux at 70 °C for one ...

Embodiment 2

[0036] Vinyltetramethylsiloxane (25 g) was dissolved in 50 mL CHCl 3 , into a three-necked flask equipped with a magnetic stir bar. The reaction bottle was placed in ice water, kept warm at 0 °C, m-chloroperoxybenzoic acid (10% excess) was dissolved in 500 mL CHCl 3 After filtration, the filtrate was slowly added dropwise to the reaction flask for 1 h, and the reaction solution was stirred overnight. 2 L of 5% Na for the reaction solution 2 CO 3 Extraction, the organic layer with anhydrous MgSO 4 After drying, it was filtered and concentrated under reduced pressure. Add hexane, filter off the residual m-chloroperoxybenzoic acid, and cool the filtrate at low temperature to obtain tetramethylsiloxane whose end group is an oxirane group.

[0037] Ethylenediamine (15 g) was dissolved in 100 mL of isopropanol and 5 mL of water, and 100 mL of isopropanol solution of tetramethylsiloxane terminated in epoxy group was added dropwise, and the reaction solution was refluxed at 70 °C...

Embodiment 3

[0040] Absorption of CO by bubbling 2Experiment, solvent weight gain ratio is shown in Table 1.

[0041] Table 1 Solvent absorption of CO 2 Weight gain ratio

[0042]

[0043] -- Dry: CO 2 Pass through dryer before reacting with amine

[0044] -- wet: CO 2 Pass through a water saturator before reacting with amine

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Abstract

The present invention discloses an organosilicon-based solvent for removing carbon dioxide from flue gas, and a process thereof. According to the present invention, the organosilicon-based solvent has advantages of high CO2 absorption capacity under low pressure, high thermal stability, high chemical stability, low raw material cost, low viscosity, low volatility, low regeneration energy consumption, low corrosion on equipment, and the like, and completely meets the high performance requirements of the large-scale flue gas decarbonization solvent.

Description

technical field [0001] The invention relates to an organosilicon solvent and a process for removing carbon dioxide from flue gas, in particular to an aminosiloxane compound and a process. Background technique [0002] CO 2 Removal technology has been commercially used for decades in food processing, natural gas desulfurization and other fields. Water-soluble alcohol amine technology has always been the 2 The best commercially viable technology in the field of removal, but the cost of alkanolamine technology for large-scale flue gas purification is too high, and the total cost of the correspondingly scaled-up alkanolamine decarbonization device is higher than the estimated cost of a small device More than 80%, so alcohol amine decarburization technology is generally not considered in the field of large-scale flue gas removal. [0003] The performance requirements for solvents that can be used for large-scale flue gas decarbonization are relatively high, such as high CO at ...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCY02A50/20Y02C20/40
Inventor 毛松柏刘鹏汪东
Owner CHINA PETROLEUM & CHEM CORP
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