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Hydrotreating method of high-acid high-calcium heavy crude oil

A heavy crude oil and hydrogenation treatment technology, which is applied in the fields of hydrogenation treatment process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of high operation risk, reduce equipment investment, improve calcium capacity, and realize effective utilization Effect

Active Publication Date: 2015-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protection reactor in this method needs to switch operation under high temperature and high pressure conditions, and the risk of operation is relatively high

Method used

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  • Hydrotreating method of high-acid high-calcium heavy crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Crude oil A is mixed with the gas product separated by the low-pressure separator 21 of the high-pressure hydrotreating zone and the gas product separated by the high-pressure separator 8 of the low-pressure hydrotreating zone and compressed by the compressor 24, and then enters the low-pressure hydrotreating zone The hydrogenation protection reactor 4 is in contact with the hydrogenation protection catalyst under low pressure conditions to carry out the hydrogenation reaction, and the hydrogenation product is separated to obtain the first hydrogen-rich gas and the first liquid product, wherein the first hydrogen-rich gas passes through the compressor 24 returns to the entrance of the low-pressure hydroprocessing area after being compressed, and the first liquid product enters the high-pressure hydroprocessing area after being boosted by the pump 11, and is separated from fresh hydrogen and the high-pressure separator 17 from the high-pressure hydroprocessing area and pas...

Embodiment 2

[0052] Hydrotreating was carried out according to the method of Example 1. The difference was that the raw oil was crude oil B, and its properties were shown in Table 1.

Embodiment 3

[0054] Hydrotreating was carried out according to the method of Example 1. The difference was that the feedstock oil was crude oil C, and its properties were shown in Table 1.

[0055] Table 1

[0056]

Crude A

crude oil B

crude oil C

Density (20℃), g / cm 3

0.945

0.957

0.982

Carbon residue value, wt%

6.47

7.210

8.53

S, weight %

1.50

1.89

2.10

N, weight %

0.35

0.33

0.29

Total acid value, mgKOH / g

2.1

7.4

15.0

Metal content, ppm

Ni

18.6

31.6

10.5

V

1.3

1.9

50.1

Ca

350

500

1400

[0057] Table 2

[0058]

Example 1

Example 2

Example 3

Process conditions

Low pressure hydrotreating zone

Hydrogen partial pressure, MPa

2.0

5.0

3.0

Reaction temperature, ...

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Abstract

The invention discloses a hydrotreating method of high-acid high-calcium heavy crude oil. The method comprises the steps of introducing high-acid high-calcium heavy crude oil and hydrogen into a low-pressure hydrotreating region and a high-pressure hydrotreating region which are connected in series, and enabling the high-acid high-calcium heavy crude oil and the hydrogen to be in contact with hydrogenation protective catalyst bed layers, hydrogenation demetallization catalyst bed layers, hydrogenation desulfurization catalyst bed layers and hydrogenation denitrogenation catalyst bed layers in sequence, wherein the hydrogenation protective catalyst bed layers are filled in a plurality of switchable hydrogenation protective reactors in the low-pressure hydrotreating region, the hydrogen partial pressure of the low-pressure hydrotreating region is 1-6.5MPa, and the hydrogen partial pressure of the high-pressure hydrotreating region is 7-20MPa. The hydrotreating method has the advantages that by dividing the whole device into the low-pressure hydrotreating region and the high-pressure hydrotreating region, deacidification and decalcification are effectively achieved, and the high-acid high-calcium heavy crude oil can be processed into qualified catalytic cracking raw materials; and meanwhile, the operation process is safe, and long-period stable running of the device and effective utilization of petroleum resources are achieved.

Description

technical field [0001] The invention relates to a method for hydrotreating heavy crude oil with high acid and high calcium. Background technique [0002] Acidic components in crude oil generally refer to naphthenic acid, other carboxylic acids, inorganic acids, phenols, and mercaptans, among which naphthenic acid and other organic acids can be collectively referred to as petroleum acid. Naphthenic acid accounts for more than 85% of the petroleum acid content, so it is customary to refer to petroleum acid as naphthenic acid in general. The acid value of crude oil reflects the amount of acidic components in crude oil. When the acid value of crude oil is greater than 0.5mgKOH / g, it can cause equipment corrosion, so crude oil with an acid value greater than 0.5mgKOH / g is usually called high-acid crude oil. At present, the production of high-acid crude oil in the world crude oil market accounts for about 5% of the total global crude oil production every year, and it is also inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04C10G67/02
Inventor 刘涛戴立顺牛传峰杨清河邵志才董凯
Owner CHINA PETROLEUM & CHEM CORP
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