Method for the Formation and Determination of Characteristic Parameters of Medium Phase Microemulsion

doi:10.19894/j.issn.1000-0518.240046

Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (8): 1175-1183.DOI: 10.19894/j.issn.1000-0518.240046

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Method for the Formation and Determination of Characteristic Parameters of Medium Phase Microemulsion

Xiang-Chun ZHANG¹(), Heng-Bo MAO², Zi-Xuan LUO³, Bin WEI³, Jing-Hua WANG⁴

^1.Zunyi Normal University College of Biology and Agriculture，Zunyi 563006，China
^2.The Twelfth Oil Production Plant，PetroChina Changqing Oilfield Company，Qingyang 745499，China
^3.Xi'an Changqing Tongxin Petroleum Technology Co. ，Ltd. ，Xi'an 710016，China
^4.Research Institute of Petroleum Exploration & Development，Petro China Changqing Oilfield Company，Xi'an 710018，China

Received:2024-02-05 Accepted:2024-07-02 Published:2024-08-01 Online:2024-08-27
Contact: Xiang-Chun ZHANG
About author:zxc54875@yeah.net
Supported by:
the Major Special Project of China National Petroleum Corporation(2021DJ1607)

Abstract

Abstract:

Mesophase micro lotion is a special stable dispersion system， whose components mainly include surfactant， water and oil. This microemulsion system has a unique three-phase coexistence characteristic， that is， it can exist with the remaining water phase and the remaining oil phase at the same time， forming a complex phase structure， which has potential application value for the removal and treatment of pollutants. In order to further guide the preparation and optimization of micro lotion in industrial production and provide guidance for the design and development of new and efficient surfactants， a method for the formation of mid phase micro lotion and the determination of its characteristic parameters was proposed. The reservoir water solution， solid sodium carbonate， surfactant， polymer alkaline water solution and distilled water were prepared into five basic water samples and four working water samples in a certain proportion， and six alkyl aryl phosphates with different structures were prepared. The characteristic parameters of mesophase micro lotion under the influence of different alkyl chain lengths， different aromatic ring positions and different temperatures were measured. It can be seen from the experimental analysis that there are two particle size dispersion groups in the working water sample， namely， the nanometer sized mesophase micro lotion liquid bead and the nanometer sized fine mesophase micro emulsion liquid bead. When no alkali is added or the concentration of alkali is low， the working water sample contacts the crude oil to form the mesophase micro lotion； When the water sample time is from 7 d to 91 d， the accumulated liquid droplets of mesophase micro lotion formed by crude oil and working water sample U0D3 are reduced from 97% to 87%， which proves that there is instability in the mesophase micro lotion， and the salt resistance of the mesophase micro lotion is negatively related to the alkyl chain length and the aryl position， and positively related to the temperature change； The solubilization ability is positively correlated with alkyl chain length and aryl position， and negatively correlated with temperature changes.

Key words: Petroleum, Phosphate, Medium phase microemulsion, Characteristic parameters

CLC Number:

O622.3

Xiang-Chun ZHANG, Heng-Bo MAO, Zi-Xuan LUO, Bin WEI, Jing-Hua WANG. Method for the Formation and Determination of Characteristic Parameters of Medium Phase Microemulsion[J]. Chinese Journal of Applied Chemistry, 2024, 41(8): 1175-1183.

Figures/Tables 8

Table 1 Water sample simulation configuration

Water sample	X	Y	Z	W	N
Reagent	Na₂CO₃， Na₂SO₄， NaCl	Na₂CO₃	Alkyl aryl phosphate （Effective substance concentration 40%， 6 types in total： NηC12-5P、NηC14-5P、NηC16-5P、ηC14-3P、ηC14-5P、ηC14-7P）	Na₂CO₃， Na₂SO₄， NaCl， PAM	H₂O
ρ/（mg·L^-1）	4 655.742， 11.316 27， 1 381.249	—	103260	4 655.742， 11.316 27， 1 381.249， 2 333	—

Table 2 Working water sample configuration ratio

Water sample coding	The proportion of basic water samples in the working water volume
Water sample coding	X	Y	Z	W	N
U0D3	90	0	4	0	6
U1D3	90	0.5	4	0	5.5
U2D3	90	0.9	4	0	5.1
U3D3	90	1.3	4	0	4.7

Fig.1 Initial working water sample size distribution diagram

Fig.2 Absorbance test results

Table 3 Cumulative distribution and maximum particle size of the first dispersed particle size group

Water sample time/d	Maximum particle size/nm				Accumulation of liquid droplets in mesophase micro lotion/%
Water sample time/d	U0D3	U1D3	U2D3	U3D3	U0D3	U1D3	U2D3	U3D3
0	58.8	73.8	246.8	235.6	97	78	100	100
7	57.3	116.6	67.8	68.2	97	76	94	94
14	59.8	78.8	65.7	69.6	96	69	93	86
21	61.6	81.8	62.6	73.7	96	69	94	94
28	65.8	74.4	83.8	67.8	95	83	93	95
35 d	67..4	76.2	53.8	67.8	95	89	93	92
49	68.8	74.4	68.5	85.8	92	87	92	83
63	68.8	73.1	67.1	77.5	90	93	95	94
77	69.9	78.9	89.8	97.6	89	91	89	93
91	66.3	67.8	66.4	73.1	87	89	93	95

Table 4 Characteristic parameters of mid-phase microemulsions with different alkyl aryl chain lengths

Related characteristic parameters	NηC12-5P	NηC14-5P	NηC16-5P
P₁/%	1.1	0.9	0.8
P₂/%	2.1	1.8	1.6
ΔP/%	1.1	0.8	0.9
P^*/%	1.6	1.36	1.2
VM^*/mL	1.99	2.91	2.18
$?$ ^*/（mL·g^-1）	6.378	9.444	10.344

Table 4 Characteristic parameters of mid-phase microemulsions with different alkyl aryl chain lengths

Related characteristic parameters	NηC12-5P	NηC14-5P	NηC16-5P
P₁/%	1.1	0.9	0.8
P₂/%	2.1	1.8	1.6
ΔP/%	1.1	0.8	0.9
P^*/%	1.6	1.36	1.2
VM^*/mL	1.99	2.91	2.18
$?$ ^*/（mL·g^-1）	6.378	9.444	10.344

Table 5 Characteristic parameters of alkyl aryl mid-phase microemulsion with different aryl positions

Related characteristic parameters	ηC14-3P	ηC14-5P	ηC14-7P
P₁/%	2.1	1.6	0.6
P₂/%	4.6	3.6	2.5
ΔP/%	2.6	2.1	2.0
P^*/%	3.36	2.61	1.56
VM^*/mL	2.46	2.78	3.31
$? *$ /（mL·g^-1）	4.61	5.68	7.44

Table 5 Characteristic parameters of alkyl aryl mid-phase microemulsion with different aryl positions

Related characteristic parameters	ηC14-3P	ηC14-5P	ηC14-7P
P₁/%	2.1	1.6	0.6
P₂/%	4.6	3.6	2.5
ΔP/%	2.6	2.1	2.0
P^*/%	3.36	2.61	1.56
VM^*/mL	2.46	2.78	3.31
$? *$ /（mL·g^-1）	4.61	5.68	7.44

Table 6 Characteristic parameters of mid-phase microemulsion under the influence of different temperatures

Related characteristic parameters	30 ℃	40 ℃	50 ℃	60 ℃
P₁/%	—	1.51	1.61	1.71
P₂/%	—	3.41	3.61	4.11
ΔP/%	—	1.81	2.11	2.51
P^*/%	—	2.46	2.61	2.91
VM^*/mL	—	1.93	1.78	1.63
$? *$ /（mL·g^-1）	—	6.197	5.681	5.177

Table 6 Characteristic parameters of mid-phase microemulsion under the influence of different temperatures

Related characteristic parameters	30 ℃	40 ℃	50 ℃	60 ℃
P₁/%	—	1.51	1.61	1.71
P₂/%	—	3.41	3.61	4.11
ΔP/%	—	1.81	2.11	2.51
P^*/%	—	2.46	2.61	2.91
VM^*/mL	—	1.93	1.78	1.63
$? *$ /（mL·g^-1）	—	6.197	5.681	5.177

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Method for the Formation and Determination of Characteristic Parameters of Medium Phase Microemulsion

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