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Aqueous oil-in-water emulsions of organic amines

An oil-in-water emulsion, organic amine technology, applied in water/sludge/sewage treatment, mixers with rotary stirring devices, mixers, etc., can solve the problem that the emulsion is not stable in storage

Active Publication Date: 2019-02-12
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsion is not storage stable and tends to separate very quickly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0081] According to a first embodiment of the method of the invention, the homogenization is carried out with a rotor-stator homogenizer. Homogenizers of the rotor-stator type are known in the art and include in principle all types of dynamic mixers, in which a rotationally symmetrical rotor interacts with a stator to form one or more operating regions, which essentially have The shape of the annular gap. In the operating area, the material to be homogenized is subjected to intense shear stresses and a high degree of eddy currents often occurs in these annular gaps and likewise facilitates the homogenization process. Examples of homogenizers with rotor-stator assemblies include ring gear dispersers, annular gap mills, and colloid mills. A ring gear disperser is preferred.

[0082] Rotor-stator homogenizers are usually operated at high rotational speeds (typically 2000 to 20 000 rpm) to achieve high peripheral speeds and thus high shear rates, subjecting the mixture of oil ph...

Embodiment 1 and comparative example 1

[0120] Example 1 and Comparative Example 1: Concentration of N-oleyl-1,3-propanediamine = 1% by weight.

[0121] The emulsion obtained according to the procedure of the invention showed 177 particles with an average diameter between 1 and 11 μm. The emulsion obtained according to the comparative procedure showed only 2 such particles.

[0122] The emulsion obtained according to the procedure according to the invention had an instability index of 0.021, while the emulsion obtained according to the comparative procedure had an instability index of 0.036.

Embodiment 2 and comparative example 2

[0123] Example 2 and Comparative Example 2: Concentration of N-oleyl-1,3-propanediamine = 2% by weight.

[0124] The emulsion obtained according to the inventive procedure showed 192 particles with an average diameter between 1 and 11 μm, whereas the emulsion obtained according to the comparative procedure showed only 10 such particles.

[0125] The emulsion obtained according to the inventive procedure had an instability index of 0.017, while the emulsion obtained according to the comparative procedure had an instability index of 0.066.

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Abstract

The present invention relates to aqueous oil-in-water emulsion containing: a) an oil phase comprising at least one organic amine of the formula (I) R1-(NH-R2)n-NH2 (I) wherein n is an integer from 0 to 7, in particular 0, 1 or 2, R1 is a linear or branched, acyclic hydrocarbon group having 12 to 22 carbon atoms; R2 is C2-C4-alkanediyl; b) and water, wherein the amount of amines of formula (I) withn being 1 or 2 is at least 90 % by weight, based on the total amount of amines of the formula (I) contained in the oil phase. The invention also relates to the use of these emulsions as a corrosion inhibitor in water-bearing systems.

Description

field of invention [0001] The present invention relates to an aqueous oil-in-water emulsion, which contains [0002] a) an oily phase comprising at least one organic amine of formula (I) [0003] R 1 -(NH-R 2 ) n -NH 2 (I) [0004] in [0005] n is an integer from 0 to 7, especially 0, 1 or 2, [0006] R 1 It is a linear or branched acyclic hydrocarbon group having 12 to 22 carbon atoms; [0007] R 2 for C 2 -C 4 - alkanediyl; [0008] b) and water, [0009] Wherein the amount of the amine of the formula (I) (wherein n is 1 or 2) is at least 90% by weight, based on the total amount of the amine of the formula (I) contained in the oil phase. [0010] The invention also relates to a process for the preparation of the emulsion and the use of the emulsion for the protection of aqueous systems, in particular the water and steam circuits of steam generators, against corrosion or fouling. Background of the invention [0011] Aqueous systems, especially water and stea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C23F11/14F22B37/52
CPCC02F5/12C23F11/10C23F11/141C23F14/02C09K5/10C02F2303/08B01F23/4105B01F27/27B01F23/4145C02F2103/023C09K15/18
Inventor J·贾斯帕K·齐默尔A·德巴赫W·黑特
Owner KURITA WATER INDUSTRIES LTD
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