Acid liquor corrosion inhibitor and preparation thereof

A technology of corrosion inhibitor and acid solution, applied in the field of metal anti-corrosion, can solve the problems of complex composition, unreasonable development and utilization of leftovers, etc., to achieve the effect of low production cost, realization of resource reuse, and improvement of corrosion inhibition performance

Active Publication Date: 2006-03-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it contains some valuable chemical products, due to its complex composition and similar boiling points, it is diffi...

Method used

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Examples

Experimental program
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Embodiment 1～5

[0027] Add the measured solvent, leftovers, phosphoric acid, and antimony trioxide into the reaction kettle, and stir evenly; then, heat to a predetermined temperature and keep the temperature constant; after that, start to add triethanolamine dropwise, and finish adding within the predetermined time; Then, keep the temperature constant and continue stirring at the same time, the stirring speed is 30-150n / min; after that, stop heating, start to cool down naturally, and continue stirring; when the material temperature drops below 40°C, add fungicides, surfactants, Synergist (KI), stir evenly to obtain the product of the present invention. See Table 1 for the formula ratio of specific operating conditions.

[0028] Experimental conditions

example 1

(Recipe 1)

Example 2

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Example 3

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Example 4

(Recipe 4)

Example 5

(Recipe 5)

heating temperature, ℃

60

70

80

70

80

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Abstract

The invention provides an acid inhibitor, which includes dormison, triethanolamine, phosphoric acid, antimony oxide, the synergistic agent and the soluble solvent. The inhibitor has improved the effect and decreased the cost; it can be used to the all kinds of the acid and major in the oil well acidification.

Description

technical field [0001] The invention relates to an acid liquid corrosion inhibitor and a preparation method thereof, in particular to an oil field acidification corrosion inhibitor and a preparation method thereof, belonging to the technical field of metal anticorrosion. Background technique [0002] Acid corrosion inhibitor is a substance that can inhibit the destruction of metals in acidic medium. Oilfield acidizing refers to injecting acid liquid into the formation to corrode and dissolve the clay-like substances that block the oil and gas passage, so as to restore or increase the permeability of the formation and realize the production increase of oil and gas wells. The acid liquid used in the acidizing process has severe corrosion on pipelines and equipment, and the most effective way to reduce or inhibit corrosion is to add corrosion inhibitors to the acidizing liquid. [0003] There are many substances that can be used as corrosion inhibitors, mainly inorganic substa...

Claims

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Application Information

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IPC IPC(8): C23F11/04
Inventor 艾抚宾王顺农侯学伟王春梅季秀珍王海波
Owner CHINA PETROLEUM & CHEM CORP
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