Method for separation of carbon dioxide from gaseous mixture and/or flow of gas for use in e.g. oil refinery, involves contacting gaseous mixture and/or gas stream with mixture containing amidine, water and aprotic solvent

摘要

#CMT# #/CMT# The method involves contacting gaseous mixture and/or gas stream with a mixture containing an amidine, water and aprotic solvent e.g. dialkyl ether, containing an ether and/or ester group such that a partially insoluble amidine-carbon-dioxide adduct or reaction product is provided as outcome. The amidine and the water are provided in a specific ratio before contacting carbon-dioxide, and the reaction product is separated. #CMT#USE : #/CMT# Method for separation of carbon dioxide from a gaseous mixture and/or a flow of gas for use in coal or gas power plant, oil processing refinery, chemical industry for manufacturing ammonia, urea, and cement, incinerator, steel production, metallurgy, steel and metal production during calcination of copper pyrite, air conditioning apparatus, natural gas and oil recovery, biological gas facility, automobile, special vehicle, commercial, automotive, and special vehicle manufacturing plant, industrial welding equipment, structural ceramic industry, limestone manufacturing industry, manufacturing and operating industrial and private combined heat and power system, manufacturing and operating dry carbon dioxide pipelines, coke manufacturing, semiconductor industry, fire protection facility for underground parking and tunnel, fermentation process for wineries, manure pits, and tunnel operation and construction (all claimed). Can also be used in a vehicle with an internal combustion engine, ship, submarine, rail vehicle, and passenger car. #CMT#ADVANTAGE : #/CMT# The gaseous mixture and/or gas stream is contacted with the mixture containing the amidine, water and aprotic solvent containing the ether and/or ester group such that the partially insoluble amidine-carbon-dioxide adduct or reaction product is provided as outcome, thus permitting separation of the carbon-dioxide from the gaseous mixture in a simple manner, while permitting release of the carbon-dioxide in a less energy-intensive manner. The method avoids the need for expensive heating and cooling process for separation of the carbon-dioxide from the gaseous mixture. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a graph illustration of a nuclear magnetic resonance spectrum. #CMT#ORGANIC CHEMISTRY : #/CMT# The amidine is selected from a group consisting of 1,8-(Diazabicyclo(5.4.0)undec-7-en), N,N-diethyl- Acetamidin, TMG (Tetramethylguanidin), 1,2-dimethyl-1,4,5,6-tetrahydropyrimidine, (1,5-Diazabicyclo(4.3.0)non-5-en), Phosphazen base such as guanidinophosphazene, 3,3,6,9,9-Pentamethyl-2,10-diazabicyclo(4.4.0)dec-1-en and halogen and derivates of mixtures.