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Method for removing organic carboxylic acid

An organic carboxylic acid removal technology, which is applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of low deacidification rate and achieve the effect of high deacidification rate

Active Publication Date: 2008-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] When the above-mentioned prior art is used to remove petroleum acid in crude oil or its fraction oil, the deacidification rate is low

Method used

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  • Method for removing organic carboxylic acid

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Effect test

Embodiment 1

[0035] Catalyzed deacidification of undesalted and dehydrated crude oil with a TAN of 13 mgKOH / g. The catalyst is SnCl 4 ·5H 2 O, wherein the content of tin ions is 10000ppm relative to the raw material. The reaction conditions in the autoclave are: temperature 430° C., pressure 3.5 MPa, residence time 300 minutes. The TAN of the reaction product oil was 0.12 mgKOH / g, and the deacidification rate was 99.08%. Effectively avoid the corrosion problem of the product oil in subsequent processing.

Embodiment 2

[0037] Catalyzed deacidification of undesalted and dehydrated crude oil with a TAN of 13 mgKOH / g. The catalyst is PbO 2 and NiSO 4 ·7H 2 O, wherein the contents of lead ions and nickel ions are both 5000ppm and 5000ppm relative to the raw materials. The reaction conditions in the autoclave are: temperature 500° C., pressure 0.5 MPa, residence time 3 minutes. The TAN of the reaction product oil was 0.1 mgKOH / g, and the deacidification rate was 99.23%. Effectively avoid the corrosion problem of the product oil in subsequent processing.

Embodiment 3

[0039] Catalyzed deacidification of undesalted and dehydrated crude oil with a TAN of 13 mgKOH / g. The catalyst is PbCl 4 and Cu(CH3COO) 2 ·H 2 The contents of lead ions and copper ions in O were 1000 ppm and 500 ppm, respectively, based on the raw material. The reaction conditions in the autoclave are: temperature 390° C., pressure 2.5 MPa, residence time 120 minutes. The TAN of the reaction product oil was 0.08 mgKOH / g, and the deacidification rate was 99.38%. Effectively avoid the corrosion problem of the product oil in subsequent processing.

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Abstract

The method of eliminating organic carboxylic acid is to mix acid containing material with catalyst containing IVA metal ion and to react at temperature 260-520 deg.c and pressure from normal pressure to 5.0 MPa for 1-300 min, with the reaction product being separated to obtain gas and liquid products. The method has acid eliminating rate as high as 99 %.

Description

technical field [0001] The invention relates to a method for removing organic carboxylic acid in materials, in particular for removing petroleum acid in crude oil and its distillate oil. Background technique [0002] The acidic components in petroleum include naphthenic acid, fatty acid, aromatic acid, mercaptan, phenols, other organic acids and inorganic acids. Among them, naphthenic acid accounts for more than 85%. In 1874, naphthenic acid was first discovered by Eichler as an acidic substance; it was later identified as a carboxylic acid with naphthenic acid by W. Markowniroff et al. The concentration or amount of acid in petroleum distillates is expressed by total acid number. The total acid number (TAN) refers to the number of milligrams of KOH required to neutralize all acidic components of 1 gram of crude oil or petroleum fractions, and the unit is mgKOH / g. Low molecular acids severely corrode metal equipment and pipelines (acid value > 0.5mgKOH / g, temperature r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G29/00
Inventor 申海平宋清虎
Owner CHINA PETROLEUM & CHEM CORP