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Preparation method for corrosion inhibition component as well as product and application thereof

A technology of corrosion inhibition and corrosion inhibitor, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve the problems of unsatisfactory corrosion inhibition effect, complex synthesis process, poor water solubility, etc., and achieve low cost and simple preparation method , the effect of high solubility

Active Publication Date: 2017-08-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are some corrosion inhibitors in the prior art, such as organic amines, thiourea derivatives, imidazoline derivatives, acetylenic alcohols, etc., these corrosion inhibitors have their own shortcomings, such as strong toxicity and poor water solubility , complex synthesis process, unsatisfactory corrosion inhibition effect, etc.

Method used

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Examples

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preparation example Construction

[0031] The invention provides a preparation method of a corrosion inhibiting component, reacting an organic ammonium salt with a thiocyanate in a polar solvent to form a precipitate, and removing the insoluble matter and the polar solvent in the reaction system to obtain the corrosion inhibitors.

[0032] In the described organic ammonium salt, the paired anion is a halide ion, a nitrate ion, a sulfate ion, a phosphate ion or a sulfonate ion; wherein, the sulfonate ion can be a sulfamate ion, a methanesulfonate ion or p-toluenesulfonate acid ions.

[0033] According to the present invention, the total number of carbon atoms in the organic ammonium salt is 8-30.

[0034] According to the present invention, the organic ammonium salt is a quaternary ammonium salt or an organic ammonium salt formed from nitrogen in an aromatic heterocycle.

[0035] According to the present invention, in the quaternary ammonium salt, among the groups connected to the quaternary ammonium nitrogen,...

Embodiment 1

[0053] Add 2.21g of dodecyl ammonium chloride (0.01mol) and 0.81g of sodium thiocyanate (0.01mol) into 15mL of ethanol / water (v / v=4:1), raise the temperature to 70°C, and reflux under stirring Reaction 1h. After finishing the reaction, cool to room temperature and stand to separate layers. The lower layer is a white precipitate, and the upper layer is a light yellow clear solution. Filter, wash the precipitate with ethanol, combine the upper clear solution and washing solution, spin dry under reduced pressure to obtain a solid product, and the product is dry. Weighs 2.29g.

[0054] The product characterization results are as follows:

[0055] 1H NMR(400MHz,DMSO):δ3.45-3.30(3H,br),2.79-2.70(2H,m),1.56-1.46(2H,m),1.39-1.44(18H,m),0.89-0.81( 3H,t)

[0056] 13C NMR (400MHz, DMSO): δ129.66, 39.83, 38.59, 31.19, 28.92, 28.83, 28.73, 28.61, 28.42, 26.81, 25.68, 21.99, 13.85

[0057] MS (ESI-MS): 186.1, [C 12 h 25 NH3 + ]

Embodiment 2

[0059] The same method as in Example 1 was adopted, except that the solvent was 15 mL of ethanol. The dry weight of the product is 2.19g.

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Abstract

The invention relates to a preparation method for a corrosion inhibition component as well as a product and application thereof. The method comprises the following steps: putting an organic ammonium salt and thiocyanate in a polar solvent for reaction to generate precipitates, and removing insoluble substances and the polar solvent in the reaction system to obtain the corrosion inhibition component. According to the corrosion inhibition component, the pH value is close to a neutral value, the solubility is good, and the corrosion inhibition performance is good.

Description

technical field [0001] The invention relates to a preparation method of a corrosion-inhibiting component and its product and application. Background technique [0002] Metal corrosion is a common problem in industrial production. For example, in the process of oil field exploitation, oil well tubing, casing, sucker rod, etc., as well as ground gathering and transportation pipelines, equipment, containers, etc. are often corroded, which will not only lead to scrapping and replacement, Stop production for maintenance; and it will leak oil and gas and cause environmental pollution. The selection of corrosion-resistant materials is a way to inhibit metal corrosion, but it is more convenient to add corrosion inhibitors. Although there are some corrosion inhibitors in the prior art, such as organic amines, thiourea derivatives, imidazoline derivatives, acetylenic alcohols, etc., these corrosion inhibitors have their own shortcomings, such as strong toxicity and poor water solubil...

Claims

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Application Information

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IPC IPC(8): C23F11/14B01F17/18B01F17/32B01F17/16C09K23/16C09K23/18C09K23/32
CPCC23F11/141C09K23/00
Inventor 孙飞傅晓萍余正齐
Owner CHINA PETROLEUM & CHEM CORP
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