A kind of adjuvant synergistic heavy oil thermal modification method

A technology of heavy oil and additives, which is applied in the fields of hydrocarbon oil cracking, hydrocarbon oil treatment, petroleum industry, etc., and can solve the problem of thermal reaction activity affecting viscosity reduction efficiency, stability of modified oil not mentioned, and stability of modified oil, etc. problems, to achieve the effect of improving stability, improving stability, and improving viscosity reduction efficiency

Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, coal tar or biomass oil has high thermal instability, and its mixing compatibility with heavy oil and its own thermal reactivity will affect the viscosity reduction efficiency, especially the stability of the modified oil. This patent does not References to the stability of upgraded oils
Obviously, there are certain limitations in heavy oil hydrogen thermal cracking and single additive viscosity reduction.

Method used

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  • A kind of adjuvant synergistic heavy oil thermal modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] With heavy oil HO-A (a heavy vacuum residue, its viscosity at 100 ℃ is 1310mm 2 / s, the asphaltene content is 11.5 wt%) as the raw material for upgrading, and the straight-run industrial distillate DA (with a distillation range of 280-420° C.) is used as the hydrogen donor. The hydrogen donor DA and the amphiphilic surface active substance (diethyl oxalate) were stirred at 100 °C for 1 h to obtain a mixing aid, and then the mixing aid was added to the heavy oil HO-A and stirred at 130 °C for 2 h, The addition amount of hydrogen donor DA is 5wt%, and the addition amount of diethyl oxalate is 250μg / g; the heavy oil HO-A mixed with additives is heated in a nitrogen atmosphere, the initial pressure is 3MPa, and the reaction temperature is 420℃. Upgrading for 10min to obtain the modified oil; the viscosity of the modified oil at 50°C was measured to be 515mm 2 / s, the coke formation rate was 0.04 wt%, and the spot test grade was grade 2.

Embodiment 2

[0071] The heavy oil HO-A is used as the raw material for upgrading, and the straight-run industrial distillate DB (with a distillation range of 250-400°C) is used as the hydrogen donor. The hydrogen donor DB and the amphiphilic surface active substance (dodecylbenzenesulfonic acid) were stirred at 120 °C for 1 h to obtain a mixing aid, and then the mixing aid was added to the heavy oil HO-A at 140 °C Stir for 2h, the addition amount of hydrogen donor DB is 7wt%, and the addition amount of dodecylbenzenesulfonic acid is 300μg / g; the heavy oil HO-A mixed with additives is placed in nitrogen atmosphere, initial pressure 3MPa, reaction temperature The modified oil was modified under the thermal reaction conditions of 425 °C for 5 minutes, and the viscosity of the modified oil at 50 °C was measured to be 490 mm. 2 / s, the coke formation rate was 0.03 wt%, and the spot test grade was grade 2.

Embodiment 3

[0073] The heavy oil HO-A is used as the raw material for upgrading, and the straight-run industrial distillate DC (with a distillation range of 250-380°C) is used as the hydrogen donor. The hydrogen donor DC and the amphiphilic surface active substance (isopropanol) were stirred at 80 °C for 1 h to obtain a mixing aid, and then the mixing aid was added to the heavy oil HO-A and stirred at 80 °C for 2 h. The addition amount of hydrogen agent DC was 10wt%, and the addition amount of isopropanol was 100μg / g; the heavy oil HO-A mixed with additives was modified under the thermal reaction conditions of nitrogen atmosphere, initial pressure of 3MPa and reaction temperature of 400℃. After 60 minutes, the viscosity of the modified oil at 50°C was measured to be 530mm. 2 / s, the coke formation rate was 0.05 wt%, and the speckle test grade was grade 2.

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Abstract

The invention relates to a method for thermal upgrading of heavy oil, in particular to a method for thermal upgrading of heavy oil in cooperation with additives, which can achieve high-efficiency reduction in viscosity of inferior heavy oil and improve product stability. The specific method is to fully mix the inferior heavy oil with the additives, then carry out thermal modification and evaluate the properties of the modified oil. The additive is made up of industrial hydrogen-donating fractions with hydrogen-donating properties and amphiphilic surface active substances (organic esters, organic acids, organic alcohol compounds), which can synergistically inhibit the thermal modification of heavy oil from coke, Improve stability and increase viscosity reduction efficiency.

Description

technical field [0001] The invention relates to a method for enhancing the viscosity-reducing and upgrading of inferior heavy oil by using an auxiliary agent, in particular to a method for enhancing the viscosity-reducing rate of inferior heavy oil and improving the stability of the generated oil by using a composite auxiliary agent with hydrogen supply ability and peptizing stability ability. qualitative method. Background technique [0002] The recoverable reserves of light crude oil resources with relatively good properties in the world are on a downward trend, while the reserves of heavy and inferior heavy oil resources are huge. Although these oil resources known as "unconventional oil resources" have great potential for extraction and processing, Due to its high viscosity, low API°, and high content of impurities and non-hydrocarbons, transportation and subsequent processing are facing huge challenges. At present, the main technologies of heavy oil upgrading at home a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/34
CPCC10G47/34C10G2300/302C10G2300/1077
Inventor 王丽涛刘贺刘银东王宗贤韩爽郭爱军许倩陈坤卢竟蔓沐宝泉鄂宇恒范世广杨行张艳梅王路海
Owner PETROCHINA CO LTD
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