SU1611411A1 - Method of cleaning hydrocarbon gas from acid components - Google Patents

Abstract

The invention relates to methods for purifying hydrocarbon-containing gases from acidic components and can be used in the gas, oil and other sectors of the industry. The gas containing hydrogen sulfide and carbon dioxide at a pressure of 160-0.12 MPa and a temperature of 10-50 ° C is in contact with the absorbent mixture of glycol with alkanolamine of the following composition, wt.%: Alkanolamine 10-70, glycol 29-89, water 0.1-1.9. As a result of the circulation of the mixed absorbent with a small amount of water and its regeneration under vacuum, the hydrogen sulfide is selectively removed from the feed gas stream and a non-watered gas is obtained. 2 tab.

Description

The invention relates to the purification of hydrocarbon gases and can be used in the gas, oil and other sectors of the industry.

The aim of the invention is to increase the selectivity of purification from hydrogen sulfide.

Example: A hydrogen sulfide-containing gas with a content of 0.1 mol.% And carbon dioxide 1 mol.% Is passed through the absorber from the bottom up. On top of the absorber serves absorbent containing j wt.%; monosanolamine (MEA) 10, ethylene glycol 895 of water 1.0. Gas is supplied in quantities of 2 m / h, absorbent in quantities of 1.0 l / h. The absorption pressure is maintained at 1.6 MPa, the temperature, Absorbent regeneration is carried out with a pressure of 0.001 Iffla and temperature. The ratio of hydrogen sulfide recovery from the potential to carbon dioxide extraction is taken as an indicator of selectivity.

PRI mme R 2. Under the same parameters, in a similar manner, they absorb the acidic gases from a gas of the same composition as in Example 1, with absorbent containing, in May.%: Methyldithanolamine (1-1 DEA) 70; diethylene glycol 29.0; water 1.0.

Baseline conditions and the results of these and similar experiments are shown in Table 1.

For comparison, a series of experiments were also carried out using an absorbent according to a known method. The initial conditions and the results of these experiments are given in table 2.

The results show that the proposed method provides selectivity (the ratio of grinding hydrogen sulfide from potential to carbon dioxide extraction) at a level of 9-15, which is 1.5-2 times higher than in the known method.

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Claims (1)

1> O rm u ls s and s t o i a Method for purification of hydrocarbon gas from acidic components by contacting with an absorbent including alkanolamine, an organic solvent and water, followed by regeneration of a saturated absorbent, which that, in order to increase the selectivity of the purification from hydrogen sulfide, and glycol is used as an organic solvent in the following ratio of components, wt. 7: Alkanolamine Glycol Water Process indicator JA * etileyagl »lsolem di e til her hl yakov eat Water content in ab- sorbent> May. £ H ₂ S content in purified gas 2,5 2.0 19 <, 0 See, about.X Selective- 0.0013 0.0013 0.00 1 3 0.0013 nost Dew point purified 1,0 10 ’, 0-1, 2 3-C th ha, a ⁰ C 0-2 (-5) - (0) (-5) - (0) '-10 ·; - I- 1 5) 'λ i -'L 2 ... 0 ; ^u  . about n _s ' 0.001) 0.001.3 o, ooi 0.0013 0 _; P013 0 _D 0013 6th 5.5-5.8 5.6-6.0 6 _; 8-7 3-Q • 2-’4 -20) - (- 15 ) 0-2 (0) - (- 2) (01 - (- 2) 0) - (- 12) (--18) - (- 20-