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Sticky crude petroleum pretreatment method

A pretreatment and crude oil technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve problems such as difficult operation and complicated process

Inactive Publication Date: 2004-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is difficult to operate when dealing with heavy oil
[0005] WO 99 / 43766A proposed to directly add calcium hydroxide and water for desalination and deacidification, but the equipment should be operated at a pressure of 10-50kg / cm 2 , The temperature is 185 ~ 265 ℃, the whole process is more complicated

Method used

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  • Sticky crude petroleum pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The properties of the heavy oil used in the test are as follows: Density (20°C) 0.9428g / cm 3 , Viscosity (80°C) 309.12mm 2 / s, salt content 683mgNaCl / L, calcium content 1652mg / kg, acid value 13.8mgKOH / g. Get this heavy oil 100g, add 20g kerosene, then add the decalcification agent that is made of 1g aminomethine phosphoric acid, 55g isopropanol, 44g water. Stir at 70 °C for 20 min, and settle at 70 °C for 1 h, separate the oil phase, add another 5 g Na to the oil phase 2 CO 3 , 70g isopropanol, 25g water deacidification agent. Stir at 70° C. for 20 minutes, settle at 70° C. for 10 hours and separate the oil phase, then add 80 g of isopropanol aqueous solution (isopropanol concentration is 70%) to the oil phase, stir for 10 minutes, and settle for 1 hour. The oil phase is separated, and the solvent is distilled off at 150°C to obtain a pretreated heavy oil with an acid value of 1.2mgKOH / g, a calcium content of 100ppm, and a salt content of less than 3mgNaCl / L.

Embodiment 2

[0029] The viscous oil that adopts, decalcifying agent are identical with embodiment 1, and deacidifying agent adopts NaHCO 3 , isopropanol and water, the processing conditions are the same as in Example 1, the acid value of the treated heavy oil is 1.3mgKOH / g, the calcium content is 120ppm, and the salt content is less than 3mgNaCl / L.

Embodiment 3

[0031] The decalcifying agent uses hydroxyethylidene diphosphoric acid, isopropanol and water, and other process conditions are the same as in Example 1. The acid value of the treated heavy oil is 1.3 mgKOH / g, the calcium content is 100 ppm, and the salt content is less than 3 mgNaCl / L.

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Abstract

A process for pretreating the thick and viscose crude oil includes diluting it with kerosene fraction, mixing with decalcifying agent, depositing, mixing with deacidifying agent, extracting, and recovering solvent. Its advantage is high effect to remove impurities including Ca, acid, and salts.

Description

technical field [0001] The invention relates to a method for pretreatment of crude oil, in particular to a method for pretreatment of viscous crude oil. Background technique [0002] At present, the exploitation of viscous crude oil at home and abroad is continuously increasing. Viscous crude oil is called heavy oil for short. Heavy oil is viscous due to the small amount of light components. The method of electric desalting and dehydration removes calcium carboxylate and petroleum acid which are insoluble in water, which brings great difficulties to the processing of heavy oil. Typical Sudan heavy oil has a salt content of 683mgNaCl / L, a calcium content of 652ppm, and an acid value of 13.8mgKOH / g. The acid value of my country's Karamay heavy oil reaches 4-10mgKOH / g, and the acid value of Bohai heavy oil reaches 4-7mgKOH / g. Heavy oil not only has high acid value, but also has high density and high viscosity. The effect of removing calcium, salt and a...

Claims

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Application Information

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IPC IPC(8): C10G21/06
Inventor 杨焜远陈国成杨文中郝荣坤丁洛
Owner CHINA PETROLEUM & CHEM CORP
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