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Catalyst for esterification and deacidification and preparation method thereof

A technology of esterification, deacidification, and catalyst, which is applied in the direction of physical/chemical process catalysts, catalyst carriers, chemical instruments and methods, etc. It can solve the problems of less pores, poor stability and anti-poisoning ability, and small specific surface area. The effect of many pores, cheap raw materials, and large specific surface area

Inactive Publication Date: 2011-05-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: for existing catalyzed esterification deacidification technology to use acidic catalyst more, stability and anti-poisoning ability are not good; The specific surface area of ​​conventional alkali metal and alkaline earth metal oxide catalyst is small, the problem of channel is few, aims at Provide a catalyst for esterification deacidification and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0013] Experimental Example 1: Add 0.5g of the catalyst to 100g of a certain domestic crude oil with an acid value of 3.78mgKOH / g, add 1g of ethylene glycol, and stir at 200°C for 2 hours. Measure the acid value of oil according to GB 264-83, and calculate the deacidification rate.

experiment example 2

[0014] Experimental example 2: Add 0.5g of catalyst to 100g of third-line oil from a refinery with an acid value of 11.17mgKOH / g, add 1g of ethylene glycol, and stir and react at 200°C for 2 hours. Measure the acid value of oil according to GB 264-83, and calculate the deacidification rate.

Embodiment 1

[0015] Embodiment 1: Mg(NO 3 ) 2 ·6H 2 O 0.067mol, Al(NO 3 ) 3 9H 2 O 0.033mol, add water to make 100mL mixed salt solution; weigh NaOH 0.225mol, NaOH 2 CO 3 0.067mol, add water to make 100mL mixed alkali solution. At 40°C, drop the mixed salt solution and the mixed alkali solution into the three-necked flask at the same time at a rate of 0.2 drops / second. After the dropwise addition, continue to stir for 30 minutes, then transfer the precipitation system to the reaction kettle, and heat it at 110°C. Crystallize for 12 hours, filter, wash, and dry at 110°C for 12 hours to obtain hydrotalcite A. Use it as a catalyst and react according to the conditions of Experiment 1. After deacidification, the acid value of the crude oil is 0.33 mgKOH / g, and the deacidification rate is 91.3%.

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Abstract

The invention relates to a catalyst for esterification and deacidification and a preparation method thereof, which are used for lowering the acid values of high-acid-value crude oil and distillate oil. The catalyst refers to a hydrotalcite or loaded hydrotalcite solid alkali catalyst. The molar ratio of magnesium to aluminum in the hydrotalcite is 1 to 4. Loaded hydrotalcite consists of 70 to 95 mass percent of carrier and 5 to 30 mass percent of active component, wherein the carrier is hydrotalcite; the active component is one of potassium carbonate or potassium nitrate or potassium fluoride or potassium hydroxide or potassium acetate; and the carrier is soaked in aqueous solution which contains the active component, is dried and is calcined at the temperature of between 350 DEG C and 550 DEG C for 2 to 8 hours. Due to the adoption of the catalyst, the defects of easy toxication of an acid catalyst and small specific surface and small pore canal of the conventional alkali metal oxide are overcome, the acid value of the high-acid-value crude oil or distillate oil can be lowered to be below 0.5 mgKOH / g or the deacidification rate is more than 90 percent.

Description

technical field [0001] The invention relates to the field of petroleum and fraction refining thereof, and relates to an esterification deacidification catalyst for high acid value crude oil or distillate oil and a preparation method thereof. Background technique [0002] Acidic substances in petroleum are collectively referred to as petroleum acids, mainly organic carboxylic acids, including naphthenic acids, aromatic acids, fatty acids, etc. Crude oil with an acid value greater than 1.0 mgKOH / g is called high-acid crude oil. Acidic substances in crude oil and petroleum fractions can cause corrosion of equipment and decrease product quality. [0003] Among various crude oil deacidification methods, the catalytic esterification method uses the esterification reaction of petroleum acid and alcohols in the presence of a catalyst to convert organic carboxylic acids into non-corrosive esters. Compared with other deacidification methods, the catalytic esterification method has t...

Claims

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Application Information

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IPC IPC(8): B01J21/10B01J32/00B01J27/232B01J27/12B01J31/26B01J27/25B01J23/04C01B13/36C10G29/16C10G29/06C10G29/12C10G29/00
Inventor 吴雁王豪钟婷何理
Owner SOUTHWEST PETROLEUM UNIV
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