Nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor and preparation method thereof

A technology of acidifying corrosion inhibitor and quaternary ammonium salt, which is applied in the field of metal anti-corrosion, can solve the problems of insufficient stability of dissolution and dispersion, high corrosion speed of oil pipe steel, and large addition of corrosion inhibitor, so as to be suitable for large-scale industrial production and application, low corrosion rate, and less harsh synthesis conditions

Inactive Publication Date: 2012-09-19
南京华洲新材料有限公司
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AI-Extracted Technical Summary

Problems solved by technology

The high-temperature corrosion inhibitors commonly used at home and abroad are prone to coking, delamination, and insufficient stability of dissolution and dispersion in high-temperature concentrated acid (above 160 ° C, 20% HCL) environments, and ...
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Abstract

The invention discloses a nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor and a preparation method thereof. The nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor comprises the following components in percentage by weight: component 1, propargyl alcohol, formaldehyde, urotropine, potassium iodide, antimonous oxide, antimony butter, surfactant and solvent in the ratio of (1-50) : (0-25) : (1-25) : (0-10) :(0-10) : (0-20) : (6-25) : (15-70), wherein the component 1 is selected from one or more of chlorinated N-benzyl-R-pyridine quaternary ammonium salt or chlorinated N-benzyl-R-quinoline quaternary ammonium salt. The nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor has the advantages of small addition amount, low cost, stable and uniform dispersion in acidic liquid, low corrosion speed, capability of resisting high temperature of over 160 DEG C and excellent performance. 0.5-2.5 percent of nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor disclosed by the invention is added into the acidic liquid, so that the corrosion speed is far lower than national primary standard.

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  • Nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor and preparation method thereof
  • Nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor and preparation method thereof

Examples

  • Experimental program(6)

Example Embodiment

[0023] Example 1
[0024] Benzyl chloride and the fraction above 180°C from the industrial synthesis pyridine kettle under normal pressure were added to the reaction kettle at a weight ratio of 1:1, and reacted at 160°C for 4 hours to prepare chlorinated N-benzyl-R-pyridine Quaternary ammonium salt; prepared N-benzyl-R pyridine quaternary ammonium salt, propynyl alcohol, formaldehyde, potassium iodide, antimony trichloride, O-15, methanol in a weight ratio of 40:5:5:1:15: 15:19, after stirring evenly, corrosion inhibitor A is obtained.

Example Embodiment

[0025] Example 2
[0026] Benzyl chloride and industrial quinoline were added to the reactor at a weight ratio of 1:1, and reacted at 160°C for 4 hours to prepare N-benzyl-R-quinoline quaternary ammonium chloride; the prepared N chloride -Benzyl-R-quinoline quaternary ammonium salt, propynol, formaldehyde, potassium iodide, antimony trioxide, O-15, methanol in a weight ratio of 40:5:5:1:15:15:19, stir well Then the corrosion inhibitor B is obtained.

Example Embodiment

[0027] Example 3
[0028] Take the N-benzyl-R pyridine quaternary ammonium chloride and N-benzyl-R-quinoline quaternary ammonium chloride prepared in Example 1 and Example 2; N-benzyl-R-pyridine quaternary ammonium chloride Ammonium salt (prepared in Example 1), N-benzyl-R-quinoline quaternary ammonium chloride (prepared in Example 2), propynol, formaldehyde, potassium iodide, antimony trioxide, O-15, methanol by weight The ratio is 20:20:5:5:1:15:15:19, and the corrosion inhibitor C is obtained after uniform stirring.
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Description & Claims & Application Information

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