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Bialkylbiphenyl sodium disulfonate, and its preparing method

A technology of sodium alkyl biphenyl disulfonate and alkyl biphenyl, applied in the field of preparation of such compounds, can solve the problems of oil layer pollution, poor salt resistance, increased polymer dosage, etc., and achieves reduced toxicity, easy operation, Reliable effect

Inactive Publication Date: 2006-10-25
CHINA WEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ASP flooding can increase the oil recovery by more than 20% compared with water flooding, but due to the presence of alkali, the amount of polymer used increases, and the precipitation of alkali and high-valent ions in the formation causes oil layer pollution
[0005] Petroleum sulfonate, benzenesulfonate and heavy alkylbenzenesulfonate anionic surfactants are widely used in ASP flooding, which have high interfacial activity and good temperature resistance, but poor salt tolerance

Method used

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  • Bialkylbiphenyl sodium disulfonate, and its preparing method
  • Bialkylbiphenyl sodium disulfonate, and its preparing method
  • Bialkylbiphenyl sodium disulfonate, and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 Preparation of sodium didodecyl biphenyl disulfonate (GB12)

[0042] (1) Preparation of dodecanoyl chloride Weigh 0.1mol of dodecanoic acid, add it to a 50ml three-necked flask, add 10ml of cyclohexane, and drop 0.15mol of thionyl chloride into it with a constant pressure dropping funnel within 1h. Control at 70-75°C. After dropping, keep stirring for about 1 hour, then raise the temperature to 85°C-90°C, reflux for 3-4 hours, and then distill out dodecanoyl chloride under reduced pressure.

[0043] (2) Preparation of didodecanoylbiphenyl Weigh aluminum trichloride (the molar ratio of alkyl acid chloride to aluminum trichloride is 1:1.1), add it to a 50ml three-necked flask, and then add about 10ml of cyclohexane , heated and stirred, poured into the prepared dodecanoyl chloride, stirred, then weighed a certain amount of biphenyl (the molar ratio of acid chloride to biphenyl was 4:1) and dissolved it in cyclohexane, and added it to In the reaction bottle,...

Embodiment 2

[0047] Example 2 Structural characterization of didodecyl biphenyl disulfonate and its sodium salt

[0048] Since sodium dodecyl biphenyl disulfonate is almost insoluble in organic solvents, only the infrared spectrogram ( figure 1 ), hydrogen spectrum ( figure 2 ), carbon spectrum ( image 3 ) to characterize the structure of its sodium salt.

[0049] see figure 1 , at 3435.68cm -1 The absorption peak at the hydroxyl group, 2916.43cm -1 , 2851.86cm -1 and 1472.12cm -1 The characteristic absorption peaks of methyl and methylene are at 1150.08cm -1 and 1296.61cm -1 There are two strong peaks and a broad peak appears near these two peaks, which may be the stretching vibration peak of S=O in sulfonic acid; at 839.00cm -1 There is a peak at , and there is a small peak immediately in front of this peak, which is the absorption peak of one of the modes in the three-position substitution of the benzene ring (the adjacent and para-positions are all substituted).

[0050] ...

Embodiment 3

[0054] Example 3 Surface activity characterization of sodium didodecyl biphenyl disulfonate

[0055] 1) Determination of equilibrium surface tension and cmc of GB12 aqueous solution

[0056] At 20°C, its surface activity was measured, and the relationship between its concentration and the surface tension of the solution was obtained as Figure 4 shown. from Figure 4 It can be seen that the gemini surfactant has a high surface activity: C20 is 0.002mmol / L, cmc is 0.17mmol / L, γcmc is 31.2mN / m, while the conventional surfactant sodium alkylbenzene sulfonate cmc 1.57 mmol / L; γcmc 37mN / m, C20 0.2mmol / L.

[0057] 2), Determination of GB12 salt resistance performance

[0058] Adding inorganic salts to the solution usually enhances the surface activity of surfactants. The influence of four inorganic salts on the surface tension of GB12 was studied. For the convenience of comparison, the influence of salts on sodium dodecylbenzenesulfonate SDBS was also studied. The results are s...

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Abstract

This invention relates to bi alkyl biphenyl tiron, it has following structure, n equals to 8,10,12,14. (1) Fatty acid and protochloride sulphones are mixed and reacted for 1 hour at 65-75 degree centigrade to get alkyl acyl chloride. (2) The alkyl acyl chloride is mixed with aluminium chloride and biphenyl, and reacted for 1 hour at 43-50 degree centigrade to get bi alkyl biphenyl ketone. (3) The bi alkyl biphenyl ketone is mixed with caustic potash and hydrazinehydrate, and then heated, back flown, and heated again to get bi alkyl biphenyl. (4) The bi alkyl biphenyl is mixed with chlorosultonic acid and reacted for 6 hours at normal temperature, and then they are back flown by methanol to get bi alkyl biphenyl disulfonic acid methyl ester. (5) The ester made is mixed with sodium hydroxide solution and heated to get bi alkyl biphenyl tiron. The surface activator has good surface activity and salt resistance, synergistic effect is good, tackifying ability is strong, and its preparation method is reliable, operation is easy, yield is high and no pollution.

Description

technical field [0001] The invention relates to sodium dialkylbiphenyl disulfonate, and also relates to a preparation method of the compound. Background technique [0002] Surfactants have become indispensable chemicals in the national economy and human daily life, and are widely used in the fields of energy mining, metal processing, textiles, daily chemicals, food and pharmaceuticals. [0003] Gemini surfactants can effectively reduce surface tension. It contains two hydrophilic groups in its molecule, which has sufficient hydrophilicity and better water solubility. It has stronger solubilization for organic matter and less irritation to the skin. Biosafety etc. Gemini surfactants, when mixed with monomeric surfactants (especially nonionic surfactants), produce a stronger synergistic effect than monomeric surfactants in terms of effectiveness and efficiency in reducing the surface tension of water. In practical applications, the method of compounding with cheap surfactant...

Claims

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Application Information

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IPC IPC(8): C07C309/32C07C303/04C09K8/584
Inventor 蒋晓慧李银涛陈慧茹胡星琪
Owner CHINA WEST NORMAL UNIVERSITY
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