Inhibitor for desalting dewatering device of refining factory, producing and using method of the same

A technology of dehydration device and corrosion inhibitor, which is applied in the fields of hydrocarbon oil dehydration/demulsification, treatment equipment corrosion/fouling inhibition, petroleum industry, etc., to achieve the effect of high corrosion inhibition efficiency, easy production and stable performance

Active Publication Date: 2008-02-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the water-soluble corrosion inhibitors that inhibit the corrosion of steel in the coexistence system of organic acids, salts and water below 160 °C, there is no report yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0014] Embodiments 1-10: A corrosion inhibitor that can be used in refinery crude oil desalination, dehydration unit salt, acid and water mixed medium and its preparation method.

[0015] The composition embodiment of table 1 corrosion inhibitor

[0016] Example

Primary corrosion inhibitor%

Auxiliary corrosion inhibitor%

Example 1

10

90

Example 2

20

80

Example 3

30

70

Example 4

40

60

Example 5

50

50

Example 6

60

40

Example 7

70

30

Example 8

80

20

Example 9

90

10

Example 10

99.5

0.5

[0017] The main corrosion inhibitor in the above table is a high-temperature organic acid corrosion inhibitor synthesized by boric acid and organic amine;

[0018] The auxiliary corrosion inhibitor is one of commercially available corrosion inhibitors such as ketalaldehyde amine corrosio...

Embodiment 11～33

[0020] Examples 11-33: Preparation and composition of main corrosion inhibitor

[0021] The composition embodiment of table 2 main corrosion inhibitor

[0022] Example

Organic acid high temperature corrosion inhibitor intermediate

Alcohol

%

Anti-corrosion film-forming components

%

boric acid, mol

Organic amine, mol

Hydrocarbons, %

Example 11

1.0

0.5

5

80

10

Example 12

1.0

0.75

10

70

20

Example 13

1.0

1.0

10

75

15

Example 14

1.0

1.25

15

75

10

Example 15

1.0

1.5

15

80

5

Example 16

1.0

1.75

20

65

15

Example 17

1.0

2.0

20

75

5

Example 18

1.0

2.25

75

60

20

Example 19

1.0

2.5

...

Embodiment 44～54

[0026] Corrosion inhibitor (embodiment 1): 10% main corrosion inhibitor+90% auxiliary corrosion inhibitor;

[0027] Corrosion system: NaCl content 1% + organic acid (formic acid: acetic acid: propionic acid = 1: 1: 1) 3% + water 96%

[0028] Table 3 Evaluation results of corrosion inhibitor examples at different temperatures

[0029] Example

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PUM

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Abstract

The invention discloses an inhibitor to inhibit steel erosion for crude oil desalting, dewatering device salt, acid, water mixed agent of refinery under 160 deg. c, which comprises the following steps: synthesizing high temperature inhibitor with 10-99. 5%boric acid and organic amine with mole ratio at 1 : 0. 5-3; mixing with one or above two at will of keto-aldehyde amine inhibitor, imidazoline inhibitor and alkynyl oxygen methyl amine inhibitor completely; getting the product; mixing the 30-2000pp inhibitor with salt, acid and water completely; preventing erosion of device, apparatus and line. This invention is easy and simple, which can be used to processing course of oil refining and oil chemical industry.

Description

technical field [0001] The invention relates to a corrosion inhibitor for inhibiting the corrosion of iron and steel by a mixed medium of salt, acid and water in refinery crude oil desalting below 160 DEG C. Background technique [0002] With the rapid growth of economic demand for energy, the use of tertiary mining technology to increase production has been widely used, resulting in worsening crude oil properties, and the proportion of low-quality crude oil with high salt content and high acid content is increasing. At present, most of the decalcification and demetallization agents developed by refineries to remove calcium from crude oil are acidic compounds. In the decalcification process of the crude oil desalting unit, there are two kinds of corrosion hazards of salt and acid, especially at the temperature > 100 ℃, the corrosion rate increases geometrically. The current anti-corrosion technology usually includes (1) using corrosion-resistant materials; (2) anti-corro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/00C10G75/02
Inventor 罗来龙李磊马玲白生军孟祥胜丁曙艳马忠庭
Owner PETROCHINA CO LTD
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