Gas hydrate generation promoter and preparation method thereof

A gas hydrate and accelerator technology, which is applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of unsatisfactory promotion effect of additives, shortening induction time, etc., to speed up hydrate formation, reduce energy consumption, and simple preparation method Effect

Inactive Publication Date: 2012-07-25
CHANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

They all promote hydrate formation to varying degrees, and the effect is more significant. They can shorten the induction time of methane hydrate formation by 1-1.5 hours, and the formation pressure is reduced by about 1-2 MPa compared with pure water systems. However, the promotion effects of the above additives are still not ideal. There is still a big gap in industrial applications

Method used

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  • Gas hydrate generation promoter and preparation method thereof
  • Gas hydrate generation promoter and preparation method thereof
  • Gas hydrate generation promoter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 12.215g of 1,3-propane sultone in 100mL of toluene, slowly add 9.915g of cycloheximide dropwise under ice bath and vigorous stirring, the two compounds are 0.1mol. After dropping, react in a water bath at 70°C for 8 h, filter the light yellow precipitate formed by the reaction, wash the filter cake with ethyl acetate and ether three times in turn, and dry at 100°C to obtain a light yellow solid which is the ionic liquid Precursor 1-(3-sulfopropyl)cyclohexylimide salt (HMIPS), its mass is 21.47g;

[0029] (2) Dissolve 0.05mol or 11.066g of HMIPS in water, add 2.8mL of 18mol / L p-toluenesulfonic acid solution dropwise at room temperature, and slowly raise the temperature to 80°C for 24 hours in a water bath to obtain a light yellow transparent liquid. Titrate to neutral with NaOH, distill under reduced pressure to remove water, then wash with methanol and ether for 3 times respectively, and distill under reduced pressure again after washing to obtain the sulfo...

Embodiment 2

[0033] (1) Same as above-mentioned embodiment 1 step (1)

[0034] (2) Dissolve 0.05mol or 11.066g of HMIPS in water, add 10.0mL of 5moL / L p-toluenesulfonic acid solution dropwise at room temperature, and slowly raise the temperature to 80°C for 24 hours in a water bath to obtain a light yellow transparent liquid. Titrate to neutral with NaOH, remove water by distillation under reduced pressure, wash with methanol and ether three times respectively, and distill under reduced pressure again after washing to obtain sulfonic acid functionalized ionic liquid [HMIPS]OTs, and dry at 100 °C to obtain 18.63 g.

[0035] (3) The obtained [HMIPS]OTs product was dissolved and prepared into ionic liquid solutions with concentrations of 100, 300, 500, 700, and 900 mg / kg. The following hydrate synthesis experiments verified that [HMIPS]OTs at different concentrations and temperatures CO in ionic liquid solution 2 The pressure of hydrate generation is compared with the data of pure water und...

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Abstract

The invention discloses a gas hydrate generation promoter and a preparation method of the gas hydrate generation promoter, relating to the gas hydrate generation promoter and the preparation method of the gas hydrate generation promoter. The gas hydrate generation promoter is 1-(3-sulfopropyl) hexamethyleneimine toluene-4-sulfonate ((HMIPS)OT), or a sulfate also using 1-(3-sulfopropyl) hexamethyleneiminium (HMIPS) group as a precursor, wherein both of the two substances are ionic liquids. The method comprises the following steps: performing quaternization of 1,3-propane sultone and equimolar amount of cyclohexyl imine to generate 1-(3-sulfopropyl)cyclohexyl imine salt; and then reacting HMIPS with equimolar amount of HY acid (toluene sulfonic acid or concentrated sulfuric acid) to obtain the ionic liquid. The two promoters prepared by the invention effectively reinforce the hydrate generation, which is verified by a hydrate synthesizing device with CO2 as a reaction gas; and the gas hydrate generation condition may be greatly weakened by only a trace amount of the promoter. Particularly, a promotion effect of 500mg/kg of (HMIPS)OTs solution is the best; and the generation pressure is 1.88MPa at 5 DEG C, which is decreased by 27.1% in comparison with that of a pure water system.

Description

technical field [0001] The invention belongs to the technical field of enhanced formation of gas hydrates, and particularly refers to the effect of two chemical additives on reducing the formation conditions of gas hydrates and a preparation method. Background technique [0002] Gas hydrate is a clathrate inclusion formed by the interaction of gas and water under certain high temperature and low pressure conditions. The host molecules, namely water molecules, are connected by hydrogen bonds to form a cage structure, and the guest molecules, namely gas molecules, are enveloped in Among them, the host-guest molecules interact with van der Waals force, which is a non-stoichiometric crystalline compound, white and ice-like. The most prominent feature of gas hydrate is that the gas storage density is extremely high. Theoretically, a unit volume of methane hydrate can store 164 times the volume of methane in the standard state (164m 3 / m 3 ); Second, the structure is stable, not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D295/088C07C309/30C07C303/32
Inventor 王树立于永涛李工徐恒
Owner CHANGZHOU UNIV
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