Method of removing gaseous sulfides from gaseous mixtures
Chevron Research Co. has developed a new process for removing gaseous sulfides from natural gas that is highly selective, can be conducted at low pressures and relatively high temperatures, uses relatively noncorrosive nonaqueous contacting solutions, produces solution regeneration readily with or without the use of inert stripping gas, and can remove essentially all the H/sub 2/S present, no matter what its initial concentration. H/sub 2/S and other sulfides are more completely removed from H/sub 2/S-CO/sub 2/ natural gas mixtures by contacting natural gas with s substituted aromatic nitrate having an electron-attracting substituent on the aromatic ring at least as strong as halogen (e.g., isophthalonitrile) and a catalyst from the group of salts consisting of potassium, sodium, lithium, ammonium, and dimethyl ammonium hydrosulfides in a hydroxyl-free solvent such as N-methyl-2-pyrrolidone. The amount of nitrile is in the range of 0.1 wt % to the solubility limit of the nitrile in the solvent and the amount of catalyst is 0.01 to 0.5 g mol/g equivalent of the nitrile. The process involves the reaction of the sulfides with the nitriles to form thioamide or thioamide derivatives.
- Assignee:
- Chevron Research Co.
- Patent Number(s):
- US 3767766
- OSTI ID:
- 5050271
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
REMOVAL
HYDROGEN SULFIDES
NATURAL GAS
DESULFURIZATION
AMMONIUM COMPOUNDS
CATALYSTS
DEGASSING
LITHIUM COMPOUNDS
NITRILES
POTASSIUM COMPOUNDS
PYRROLIDONES
SODIUM COMPOUNDS
ALKALI METAL COMPOUNDS
AMIDES
AZOLES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
LACTAMS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRROLES
SULFIDES
SULFUR COMPOUNDS
030300* - Natural Gas- Drilling
Production
& Processing