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Novel rosin imidazoline corrosion inhibitor

A technology of rosin-based imidazoline and corrosion inhibitor, which is used in wellbore/well components, earthwork drilling, organic chemistry, etc., achieves the effects of high corrosion inhibition rate, reduced corrosion loss and simple method

Active Publication Date: 2016-01-27
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Novel rosin imidazoline corrosion inhibitor
  • Novel rosin imidazoline corrosion inhibitor
  • Novel rosin imidazoline corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of synthetic method of formula (4) compound, its step is as follows:

[0026] Step a: the synthesis of formula (2) compound:

[0027] 100g abietic acid (0.331mol) and 69gK 2 CO 3 (0.497mol) was dissolved in 800ml of dimethylformamide solvent, and 56.4 grams (0.397mol) of MeI was added, stirred for 3 hours and plated to confirm that the reaction was complete. Remove MeI by rotary evaporation under reduced pressure, extract and concentrate with EA, wash with water to remove DMF solvent, wash the organic layer with saturated sodium chloride, dry and concentrate, and the remaining components are purified by 1:10 EA / PE through a silica gel column to obtain 100 g of formula (2) Compounds.

[0028] 1 HNMR (CDCl 3 ,400MHz):0.75(m,7H);0.94(m,6H);1.18(m,7H);1.50(m,4H),1.73(m,6H);2.01(m,4H);2.14(m, 1H); 3.55(s,3H); 5.29(d,1H); 5.70(s,1H).

[0029] Step b: Synthesis of the compound of formula (3):

[0030] At 0-10°C, add 57.0g (0.949mol) ethylenediamine and 0.949molA...

Embodiment 2

[0036] First, the compound of formula (4) prepared in Example 1 is prepared into a corrosion inhibitor, and the corrosion inhibitor is composed of a compound of formula (4), dimethylformamide, hydroxyethylene diphosphonic acid and water, specifically The content range is as follows:

[0037]

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Abstract

The invention relates to the synthesis and application technology field of compounds used for metal anticorrosion, and concretely discloses a novel rosin imidazoline corrosion inhibitor, a synthetic method and applications. The initial raw material of the provided compound is rosin acid, the raw material is single and the synthetic route operation is simple. The method for preparing a corrosion inhibitor from the synthesized compound is simple, the compound is dissolved in dimethyl formamide, then the obtained solution is dissolved in water, then 1-hydroxyethylidene-1,1-diphosphonic acid is added, and uniform stirring is carried out. The corrosion inhibitor is safe and environmentally friendly, and has excellent corrosion inhibition effects. The corrosion inhibitor can be used for oil and gas field ground gathering and storage and transportation pipes, prevents damage of corrosive gases to metal materials of steel and the like and reduces corrosion loss.

Description

technical field [0001] The invention relates to the technical field of synthesis and application of compounds used for metal anticorrosion, in particular to a novel rosin-based imidazoline compound and its synthesis method and application. The compound can be used as a corrosion inhibitor for oil and gas well production and pipeline transportation Process metal corrosion. Background technique [0002] In recent decades, oil and gas fields containing various corrosive media such as hydrogen sulfide, carbon dioxide and high-salinity formation water have emerged one after another. Severe corrosion of oil and gas field equipment in sour environment has attracted more and more attention. The corrosion of oil and gas fields not only causes huge economic losses to the development and production of oil and gas fields, but also directly threatens the living environment and health of human beings. It can be seen that strengthening the research on corrosion and protection technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/06C23F11/167C23F11/14C09K8/54
Inventor 胡海翔杨欢李小春
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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