An absorbent solution is provided for removing acid compounds contained in a gaseous effluent and a method of removing acid compounds contained in a gaseous effluent contacts the gaseous effluent with the absorbent solution. The absorbent solution includes at least one of the following two nitrogen compounds belonging to the family of tertiary diamines: 1-dimethylamino-3-(2-dimethylaminoethoxy)-2-propanol ##STR00001## 1,1-oxybis[3-(dimethylamino)-2-propanol] ##STR00002##
and water.

A method is described for separating CO.sub.2 and/or H.sub.2S from a mixed gas stream by contacting the gas stream with a non-aqueous, liquid absorbent medium of a primary and/or secondary aliphatic amine, preferably in a non-aqueous, polar, aprotic solvent under conditions sufficient for sorption of at least some of the CO.sub.2. The solution containing the absorbed CO.sub.2 can then be treated to desorb the acid gas. The method is usually operated as a continuous cyclic sorption-desorption process, with the sorption being carried out in a sorption zone where a circulating stream of the liquid absorbent contacts the gas stream to form a CO.sub.2-rich sorbed solution, which is then cycled to a regeneration zone for desorption of the CO.sub.2 (advantageously at <100 C.). Upon CO.sub.2 release, the regenerated lean solution can be recycled to the sorption tower. CO.sub.2:(primary+secondary amine) adsorption molar ratios>0.5:1 (approaching 1:1) may be achieved.

Provided are a hydroxy compound and an ion conducting agent each having excellent electroconductivity. Also provided is an electroconductive resin composition suppressed in bleeding and excellent in electroconductivity through the use of the hydroxy compound. Specifically, provided are a hydroxy compound represented by the following general formula (1), and an ion conducting agent including the hydroxy compound. ##STR00001##

Provided are a hydroxy compound and an ion conducting agent each having excellent electroconductivity. Also provided is an electroconductive resin composition suppressed in bleeding and excellent in electroconductivity through the use of the hydroxy compound. Specifically, provided are a hydroxy compound represented by the following general formula (1), and an ion conducting agent including the hydroxy compound. ##STR00001##

The invention relates to novel nitrogen compounds belonging to the family of tertiary diamines of general formula (I) below, wherein R is an alkanediyl radical (CH.sub.2)n- with n=2, 3, 4, 5 or 6.

##STR00001##

The compound according to the invention is for example N,N,N,N-(tetramethyl)-1,6-diamino-2,5-hexanediol or N,N,N,N-(tetramethyl)-1,8-diamino-2,7-octanediol. The invention also relates to the method for preparing them and to their use for removing acid compounds contained in a gaseous effluent.

The invention relates to novel nitrogen compounds belonging to the family of tertiary diamines of general formula (I) below, wherein R is an alkanediyl radical (CH.sub.2)n- with n=2, 3, 4, 5 or 6.

##STR00001##

The compound according to the invention is for example N,N,N,N-(tetramethyl)-1,6-diamino-2,5-hexanediol or N,N,N,N-(tetramethyl)-1,8-diamino-2,7-octanediol. The invention also relates to the method for preparing them and to their use for removing acid compounds contained in a gaseous effluent.

The invention relates to novel nitrogen compounds belonging to the family of tertiary diamines of general formula (I) below, wherein R is an alkanediyl radical (CH.sub.2)n- with n=2, 3, 4, 5 or 6.

##STR00001##

The compound according to the invention is for example N,N,N,N-(tetramethyl)-1,6-diamino-2,5-hexanediol or N,N,N,N-(tetramethyl)-1,8-diamino-2,7-octanediol. The invention also relates to the method for preparing them and to their use for removing acid compounds contained in a gaseous effluent.

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I wherein R.sup.1 is C.sub.9-C.sub.22 alkyl or alkenyl, which is linear or branched, R.sup.2 is H, C.sub.1-C.sub.4 alkyl, which is linear or branched, R.sup.3 is XNH.sub.2, H or C.sub.1-C.sub.4 alkyl, which is linear or branched, and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula 1-X wherein R.sup.1 is C.sub.9-C.sub.15 alkyl, which is linear or branched, R.sup.2 is H, R.sup.3 is XNH.sub.2 and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, is disclosed. ##STR00001##

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I wherein R.sup.1 is C.sub.9-C.sub.22 alkyl or alkenyl, which is linear or branched, R.sup.2 is H, C.sub.1-C.sub.4 alkyl, which is linear or branched, R.sup.3 is XNH.sub.2, H or C.sub.1-C.sub.4 alkyl, which is linear or branched, and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula 1-X wherein R.sup.1 is C.sub.9-C.sub.15 alkyl, which is linear or branched, R.sup.2 is H, R.sup.3 is XNH.sub.2 and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, is disclosed. ##STR00001##

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I

##STR00001## wherein R.sup.1 is C.sub.9-C.sub.22 alkyl or alkenyl, which is linear or branched, R.sup.2 is H, C.sub.1-C.sub.4 alkyl, which is linear or branched, R.sup.3 is XNH.sub.2, H or C.sub.1-C.sub.4 alkyl, which is linear or branched, and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula I-X

##STR00002## wherein R.sup.1 is C.sub.9-C.sub.15 alkyl, which is linear or branched, R.sup.2 is H, R.sup.3 is XNH.sub.2 and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, is disclosed.