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Application for gemini-type quarternary ammonium salt compounds or composition thereof

A compound and composition technology, which is applied in the field of gemini-type quaternary ammonium salt compounds or their compositions, can solve the problems of easy demulsification, large amount of surfactant, poor thermal stability, etc.

Inactive Publication Date: 2014-01-15
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defect that existing microlactic acid system exists is: thermal stability is relatively poor (under the condition higher than 70 ℃, system is easy to demulsify), and the consumption of tensio-active agent is bigger (accounting for about 20wt% of whole microlactic acid system)

Method used

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  • Application for gemini-type quarternary ammonium salt compounds or composition thereof
  • Application for gemini-type quarternary ammonium salt compounds or composition thereof
  • Application for gemini-type quarternary ammonium salt compounds or composition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Propylene-containing dioctadecyldimethylammonium chloride (compound Ia, in formula I, R 2 and R 5 Both are octadecyl, R 1 , R 3 , R 4 and R 6 Both are methyl) micro-lactic acid system preparation and temperature resistance test:

[0039] Take compound Ia (purity is 70%) quality is 0.3g, 0.4g, 0.5g, 0.6g, 0.7g, 0.8g, 0.9g, 1.0g altogether 8 parts, add n-butanol 0.15g, 1: 1 hydrochloric acid respectively Mix 7mL (7.6222g) and 3mL (2.1625g) of diesel oil evenly under magnetic stirring at room temperature, and add n-octanol dropwise until the system is transparent to obtain microlactic acid. The temperature resistance properties of various microlactic acids obtained are shown in Table 1

[0040] Table 1

[0041]

[0042] It can be seen from Table 1 that the three systems numbered 6, 7 and 8 are all high temperature resistant diesel microemulsion hydrochloric acid systems.

[0043] (2) Steel sheet corrosion inhibition performance of diesel microemulsion hydrochlo...

Embodiment 2

[0060] (1) Preparation of microemulsion hydrochloric acid system containing compound Ia and its temperature resistance

[0061] a. Compound Ia and AEO 9 Compounding:

[0062] Get compound Ia (purity is 98%) and AEO 9 The total mass is 0.7g, weighed according to its mass ratio of 1 / 9, 2 / 8, 3 / 7, 4 / 6, 5 / 5, 6 / 4, 7 / 3, 8 / 2 and 9 / 1 A certain amount of 9 parts of surfactant, and 0.15g of n-butanol, 7mL of 1:1 hydrochloric acid, and 3mL of diesel oil were added respectively, mixed evenly under magnetic stirring at 70°C, and n-octanol was added dropwise until the system was transparent, to obtain Microlactic acid; its n-octanol dosage and temperature resistance are as shown in Table 2.

[0063] Table 2

[0064]

[0065] * The emulsifier is composed of compound Ia and AEO 9 , a mixture of n-butanol and n-octanol.

[0066] It can be seen from Table 2 that the three systems numbered 4, 5 and 6 are all high temperature resistant diesel microemulsion hydrochloric acid systems.

[...

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Abstract

The invention relates to an application for gemini-type quarternary ammonium salt compounds or the composition thereof. The invention further relates to a microemulsified acid system containing the gemini-type quarternary ammonium salt compounds or the composition thereof, wherein the microemulsified acid system is a mixture mainly composed of diesel oil, hydrochloric acid, the gemini-type quarternary ammonium salt compounds or the composition thereof (a main surfactant) and an auxiliary surfactant; based on the total weight of 100%, of the used raw materials, the gemini-type quarternary ammonium salt compounds or the composition thereof accounts for 7-10 wt%; the auxiliary surfactant is selected from one or the mixture of more than two (or two) of C4-C8 aliphatic monohydric alcohols. The microemulsified acid system provided by the invention is resistant to a temperature of 100 DEG C, and resistant to calcium chloride with a content of 230000 mg / l and remarkable in retardance reaction and corrosion inhibition performance, and is expected to be used for exploiting low permeable oil-gas stratigraphic deposits as an acidizing fluid.

Description

technical field [0001] The present invention relates to a kind of purposes of gemini (Gemini) type quaternary ammonium salt compound or its composition, in addition, the present invention also relates to a kind of microlactic acid system (Microemulsified acid system). Background technique [0002] In order to improve the recovery of low-permeability oilfields, acidizing is an important construction method, and the performance of acidizing fluid determines the success or failure of acidizing construction. [0003] Microemulsified acid system (Microemulsified acid system) is a new type of acidified liquid developed on the basis of microemulsion. It is mainly a microemulsion spontaneously formed by acid, oil and surfactant in an appropriate ratio, and is thermodynamically stable. dispersed system. [0004] So far, a variety of micro-lactic acid systems have been reported, mainly kerosene micro-lactic acid (Qiao Lijie, Fang Bo and Wang Fang et al., Preparation and properties o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74
CPCC09K8/74C09K8/602C09K8/604C09K8/725C09K2208/32
Inventor 陈彦东方波卢拥军房鼎业邱晓慧郝敏梁利崔明月黄顺德彭亚寻
Owner EAST CHINA UNIV OF SCI & TECH