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Method for eliminating petroleum acid in hydrocarbon oil

A petroleum acid and hydrocarbon oil technology, applied in the field of deacidification, can solve the problems of serious coking, low deacidification rate, long reaction time, etc., and achieve the effect of less equipment investment, improved deacidification rate, and simple operation

Active Publication Date: 2009-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the reaction time is long, the coking problem is serious, and the deacidification rate (i.e. the reduction rate of carboxylic acid content) is not high, and the deacidification rate reaches only 51%.

Method used

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  • Method for eliminating petroleum acid in hydrocarbon oil
  • Method for eliminating petroleum acid in hydrocarbon oil

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0045] Add 1 kg of Changling dry rubber powder with 3 kg of decationized water, add 1 kg of pseudoboehmite, adjust the pH to 2-4 with hydrochloric acid, stir evenly, age at 75°C for 1 hour, and lower the temperature to Below 60°C, add 1.7 kg of REHY, stir evenly, filter and place in an oven at 80°C for 4 hours, extrude into clover-shaped strips with a circumscribed circle diameter of 1.4mm, wash with ammonium acetate with pH = 8.8 at room temperature, and dry at 120°C , Catalyst A was obtained by calcining at 630° C. in an air atmosphere for 7 hours.

preparation Embodiment 2

[0047] Catalyst B was obtained in the same manner as in Preparation Example 1, except that the molecular sieve was 2 kg of USY.

preparation Embodiment 3

[0049] Use 3 kg of decationized water to mix 0.5 kg of Changling dry rubber powder, then add 1 kg of pseudo-boehmite, adjust the pH to 2-4 with hydrochloric acid, stir well, age at 75°C for 1 hour, and lower the temperature to 60°C Below ℃, add 2.5kg REY, stir evenly, filter and place in an oven at 80℃ for 4 hours, extrude into 1.4mm trilobal strips, wash with ammonium acetate with pH = 8.8 at room temperature, dry at 120℃, and air at 630℃ Calcined under atmosphere for 7 hours to obtain catalyst C.

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Abstract

A method for removing petroleum acid comprises contacting acid-containing hydrocarbon oil with a catalyst at a temperature of 200-500° C., wherein the catalyst is an acidic catalyst, and the acid-containing hydrocarbon oil and the catalyst are contacted in a distillation tower. The catalyst used in the present invention is an acidic catalyst, which catalyzes the carboxyl group of petroleum acid in the acid-containing hydrocarbon oil, so that the petroleum acid is decomposed into hydrocarbons, carbon dioxide, carbon monoxide and water, and the acid-containing hydrocarbon oil and the catalyst are in the distillation tower Contact, the generated gas products can be evaporated from the reaction system in time, which is beneficial to improve the deacidification rate; only need to modify the conventional distillation tower, and add a catalyst bed at the bottom of the distillation tower to realize the deacidification of acid-containing hydrocarbon oil process, and the acid-containing hydrocarbon oil after deacidification can be subjected to conventional distillation and separation in the distillation tower to obtain deacidified acid-containing hydrocarbon oil, so the equipment investment is small and the operation is simple.

Description

technical field [0001] The present invention relates to a method for deacidification, more particularly to a method for removing petroleum acid. Background technique [0002] Petroleum acid, that is, acidic substances in crude oil, includes inorganic acids, phenols, mercaptans, aliphatic carboxylic acids and naphthenic acids, among which naphthenic acid is the main acidic substance in crude oil, and its content accounts for about 90% by weight of acidic substances. [0003] In the process of crude oil processing, petroleum acidic substances can directly react with iron, and can also react with the protective film ferrous sulfide on petroleum equipment, causing equipment corrosion. General petroleum products, such as gasoline, diesel, and kerosene, usually have acid value requirements in the quality indicators. Too high acid value will easily bring the same corrosion problems to users. If petroleum acid cannot be removed during the refining process, it will affect the qualit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/00
Inventor 龙军侯栓弟毛俊义张占柱张久顺汪燮卿武雪峰何峻
Owner CHINA PETROLEUM & CHEM CORP