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Low-toxicity mannich base compound, prepared acidizing corrosion inhibitor and preparation method thereof

A technology of acidifying corrosion inhibitor and Mannich base, which is applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve problems such as unstable performance, corrosion inhibitor product pollution, and high cost, and achieve mitigation Excellent corrosion performance, inhibition of cathode and anode processes, and stable properties

Active Publication Date: 2014-07-02
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a low-toxicity Mannich base compound, an acidification corrosion inhibitor prepared therefrom and its preparation method and use, which solves the problems of serious pollution, high cost and unstable performance of corrosion inhibitor products in the prior art

Method used

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  • Low-toxicity mannich base compound, prepared acidizing corrosion inhibitor and preparation method thereof
  • Low-toxicity mannich base compound, prepared acidizing corrosion inhibitor and preparation method thereof
  • Low-toxicity mannich base compound, prepared acidizing corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 22.6g of morpholine, 52.8g of cinnamaldehyde and 9.3g of isopropanol into a three-necked flask, then slowly add 25.5g of cyclohexanone, stir evenly, adjust the pH to 4~5 with hydrochloric acid, and set the temperature at 85~100℃ After reacting for 7 hours, the Mannich base compound can be obtained after the system is cooled. Wherein the molecular formula of the Mannich base compound is:

Embodiment 2

[0032] Mix 22.6g of morpholine, 37.6g of furfural and 8.6g of isopropanol into a three-necked flask, then slowly add 25.5g of cyclohexanone, stir evenly, adjust the pH to 4~5 with hydrochloric acid, and react at 90~95°C After 6h, the Mannich base compound can be obtained after the system is cooled. Wherein the molecular formula of the Mannich base compound is:

Embodiment 3

[0034] Use the Mannich base compound in Example 1 as the main corrosion inhibitor 1 and N,N-dimethylformamide, water, Pingpinga-O (alkyl alcohol polyoxyethylene ether) and propynyl alcohol according to Table 1 The ratio of mixing in the acidification corrosion inhibitor MNX-I.

[0035] The proportioning of table 1MNX-I acidification corrosion inhibitor

[0036]

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Abstract

The invention relates to a low-toxicity mannich base compound for preparing an acidizing corrosion inhibitor. A molecular formula of the compound is shown in the specification. The invention also relates to a mannich acidizing corrosion inhibitor prepared by using the mannich base compound, and further relates to a mannich synergistic acidification corrosion inhibitor formed by the mannich acidizing corrosion inhibitor and a halide ion synergist in a compounding manner. In addition, the invention relates to a preparation method of the mannich acidizing corrosion inhibitor. A formula of the mannich acidizing corrosion inhibitor is prepared from a main mannich acidizing corrosion inhibitor, an organic solvent, a surfactant, a corrosion additive and a solvent in the compounding manner. The invention further relates to a method for preparing the mannich synergistic acidification corrosion inhibitor by using the method. By adopting the mannich base compound, the acidizing corrosion inhibitor and the preparation method thereof, the problems that the corrosion inhibitor product in the prior art is serious in pollution, high in cost, and unstable in performance are solved.

Description

technical field [0001] The invention relates to the field of metal corrosion and protection, in particular to a low-toxic Mannich base compound, an acidification corrosion inhibitor prepared therefrom, a preparation method and application thereof. Background technique [0002] In the development of oil and natural gas resources, acid fracturing technology is a very effective measure to increase production. In order to expand the oil flow channel and reduce the oil flow resistance, a certain amount of acid liquid is usually injected into the formation by mechanical means, and the formation near the bottom of the well is dissolved through the flow and reaction of the acid liquid in the intercrystals, cavities and micro-fractures of the underlying voids. The plugging material and certain components in formation rocks in order to achieve the purpose of increasing production. However, the acid injection will cause severe corrosion of oil and gas well tubing and downhole equipmen...

Claims

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Application Information

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IPC IPC(8): C07D295/116C07D307/52C09K8/74
CPCC07D295/116C07D307/52C09K8/74C09K2208/32
Inventor 王红艳白真权魏斌
Owner BC P INC CHINA NAT PETROLEUM CORP
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