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Esterification acid reduction method for primary oil or distillate oil

A technology of distillate oil and crude oil, which is applied in the field of esterification and acid reduction, can solve the problems of difficult separation and removal of metal salt catalysts, and achieve the effects of increasing cetane number, high deacidification rate and reducing smoke

Active Publication Date: 2013-01-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The metal carboxylate used is metal naphthenate, stearate or palmitate, and the metal elements of the carboxylate are preferably Li, Na, K, Mg, Ca, Sc, La, Ti, Zr , Mn, Co, Al, or Cs, but the metal salt catalyst is not easy to separate and remove from crude oil, and the reaction needs to be carried out at a higher temperature

Method used

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  • Esterification acid reduction method for primary oil or distillate oil
  • Esterification acid reduction method for primary oil or distillate oil

Examples

Experimental program
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Effect test

example 1

[0022] The simulated oil prepared by mixing 80g of petroleum acid extracted from diesel fraction with hydrogenated white oil with a boiling range of 300-350°C has an acid value of 8.7mgKOH / g. The simulated oil was added to a 500ml autoclave, and 0.4g of ferrocene and 4.6g of ethylene glycol were added to react for 1 hour. The acid value of the simulated oil was reduced to 0.47mgKOH / g, and the acid conversion rate was 94.6% by mass.

example 2～6

[0024] Put 80g of Penglai 19-3 crude oil with an acid value of 3.24mgKOH / g into a 250ml three-neck flask, and add different contents of ferrocene. A distillation column, a thermometer and a sample injector were respectively installed at the three mouths of the three-necked flask. The temperature of the crude oil was controlled to be 250° C., the outlet temperature of the distillation column was 120° C., and 1.5 ml of ethylene glycol was added into the three-neck flask from the injector for one hour of reaction. The amount and reaction result of ferrocene added by each example are shown in Table 1.

example 7～12

[0026] Add 200g of Penglai 19-3 crude oil with an acid value of 3.24mgKOH / g into a 500ml three-necked flask, and add 1.0g of ferrocene. A distillation column, a thermometer and a sample injector were respectively installed at the three mouths of the three-necked flask. The temperature of the crude oil was controlled to be 250° C., the outlet temperature of the distillation column was 120° C., and 3.8 ml of ethylene glycol was added into the three-necked flask from the injector to react for a specified time. Each example reaction time and reaction result are shown in Table 2.

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Abstract

A method for esterifying and reducing acid of crude oil or distillate oil comprises the step of esterifying crude oil or distillate oil and alcohol in the presence of dicyclopentadienyl iron derivatives represented by formula (I), wherein, in formula (I), R1 and R2 are respectively 1 to 5 substituents on cyclopentadiene ring and are respectively selected from hydrogen, C1 to C8 alkyl, C6 to C8 aralkyl or C1 to C2 acyl. The method is used for esterifying and reducing acid of crude oil or distillate oil and has better acid reduction effect.

Description

technical field [0001] The invention relates to a method for esterification and acid reduction of crude oil or distillate oil, specifically a method for reducing acid content in crude oil or distillate oil through esterification reaction under the action of a catalyst. Background technique [0002] Petroleum acid is a general term for acidic substances in petroleum, and its main component is naphthenic acid. When the acid value of crude oil is greater than 0.5mgKOH / g, it can cause corrosion of equipment during the refining process and reduce the quality of oil products. In view of the problems caused by high acid value crude oil to the refining process, countries all over the world are studying new methods of processing high acid value crude oil, including solvent extraction, adsorption, alkali neutralization, esterification, hydrogenation and heat treatment. However, there are some deficiencies in the processing methods. Although the alkali neutralization method is relativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G29/22
Inventor 田松柏李子锋王子军
Owner CHINA PETROLEUM & CHEM CORP