SURFACTANT AND METHOD OF ITS PRODUCTION Russian patent published in 2024 - IPC C08G65/28 C09K8/584 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a surfactant and a method of its production, to an anionic-nonionic surfactant containing heteroatoms based on a polyalkoxyether. The surfactant has the following formula (I): R₁-O-(Poly)_n-X-Y^a-·a/bM^b+ (I), where R₁ represents any of the aliphatic groups and aromatic groups C₁-C₃₀; in each case the Poly groups, the same or different from each other, are independently selected from the group represented by the formula (Ru-O)_m, in each Poly group, in each case the Ru groups, the same or different from each other, are independently selected from linear or branched C₂-C₄ alkylene groups, provided that the Ru group in at least some of the Poly groups is selected from butylene, and a connecting group L is present between at least some of the Poly groups; wherein L represents a group, selected from -NR₆ -, -S- and -X ¹ -R ₅ -X ² -, wherein X¹ and X² are independently selected from NR₆ or S, R₅ being any group selected from C₁-C₁₀, alkylene, alkenylene and arylene groups, and R₆ is selected from H or C₁-C₄ alkyl groups, n is a number from more than 0 to 300, for each type of group (Ru-O) m is independently a number from more than 0 to 100, X is any of the alkylene or arylene groups containing 1–10 carbon atoms, Y is an anionic group that is at least one of carboxylate, sulfonate, sulphate or phosphate, M is a cation or cationic group to provide charge balance in the formula, wherein the cation or cationic group is at least one cation selected from the group consisting of an alkali metal cation, an alkaline earth metal cation and an ammonium cation; and a represents the absolute value of the valency Y, and b represents the absolute value of the valency M. A surfactant having molecular formula (II) is also described: R₁-O-(R₂O)_x-L₁-(R₃O)_y-L₂-(R₄O)_z-X-Y^a-·a/bM^b+ (II), where R₁ represents any from aliphatic groups or aromatic groups, C₁ -C₃₀, R₂, R₃ and R₄ represent at least one group independently selected from the group consisting of ethylene, propylene and butylene, and x, y and z in each case independently represents any number from greater than 0 to 100, L₁ and L₂ independently represent heteroatom-containing groups selected from -NR₆ -, -S- and -X¹ -R ₅ -X ² -, wherein X¹ and X² is independently selected from NR₆ or S, R₅ is any group selected from C₁-C₁₀, alkylene, alkenylene and arylene groups, and R₆ is selected from H or C₁-C₄ alkyl groups, X is any group of alkylene or arylene groups containing 1–10 carbon atoms, Y is an anionic group that is at least one of carboxylate, sulfonate, sulphate or phosphate, M is a cation or cationic group to provide charge balance in the formula, wherein the cation or cationic group is at least one cation selected from the group consisting of an alkali metal cation, an alkaline earth metal cation and an ammonium cation, and a represents the absolute value of the valency Y, and b represents absolute value of valency M. A method of producing surfactants is also described. Fig. 2 shows the infrared spectrum of an anionic-nonionic surfactant containing heteroatoms based on polyalkoxyether.

EFFECT: provision of surfactants with improved emulsifying ability and oil washing ability, capable of increasing the oil recovery factor.

13 cl, 4 dwg, 4 tbl, 13 ex