Method for adsorption deacidification of diesel oil and production of bentonite naphthenate

A technology of naphthenic acid and bentonite, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of high price and high production cost, and achieve the effect of reducing adsorption cost and avoiding pollution

Inactive Publication Date: 2011-01-26
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional organic bentonite and the organic acid bentonite disclosed in [Application (Patent) No.] CN200710027154.X and its preparation method, the production cost of the product is relatively high due to the high price of the raw material organic amine or organic acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 1 part of calcium hydroxide-loaded clay with a particle size of 100 mesh and a calcium hydroxide content of 8 mmol / g to the first deacidification diesel, and deacidify at 55°C for 100 minutes while stirring to obtain a deacidification diesel suspension; Filtrate the deacidified diesel suspension to obtain finished diesel oil with an acid value of 2mgKOH / 100mL and a filter cake; add the filter cake to 150 parts of calcium hydroxide-loaded clay in raw diesel oil with an acid value of 40mgKOH / 100mL, and stir at 60°C Deacidification under 90 minutes to obtain the first deacidification diesel suspension; the first deacidification diesel suspension is filtered to obtain the first deacidification diesel and naphthenic acid bentonite filter cake, and the first deacidification diesel is returned to step 1 to carry out The second deacidification: the naphthenic acid bentonite filter cake is recovered with steam to recover residual diesel oil, dried and pulverized to obtain nap...

Embodiment 2

[0017] Add 1 part of calcium hydroxide-loaded clay with a particle size of 100 mesh and a calcium hydroxide content of 6 mmol / g to the first deacidified diesel oil, and deacidify at 60°C for 60 minutes under stirring to obtain a suspension of deacidified diesel oil; Filtrate the deacidified diesel suspension to obtain finished diesel oil and filter cake with an acid value of 1.8 mgKOH / 100 mL; add the filter cake to raw diesel oil with an acid value of 30 mgKOH / 100 mL of 200 parts of calcium hydroxide-loaded clay at 65 °C Deacidify under stirring for 50 minutes to obtain the first deacidified diesel suspension; filter the first deacidified diesel suspension to obtain the first deacidified diesel and naphthenic acid bentonite filter cake, and return to step 1 for the first deacidified diesel The second deacidification is carried out; the naphthenic acid bentonite filter cake is recovered with steam to recover residual diesel oil, dried and pulverized to obtain naphthenic acid ben...

Embodiment 3

[0019] Add 1 part of calcium hydroxide-loaded clay with a particle size of 200 mesh and a calcium hydroxide content of 10 mmol / g to the first deacidified diesel oil, and deacidify at 50°C for 70 minutes under stirring to obtain a suspension of deacidified diesel oil; Filtrate the sour diesel suspension to obtain finished diesel oil and filter cake with an acid value of 2mgKOH / 100mL; add the filter cake to 250 parts of calcium hydroxide loaded clay in raw diesel oil with an acid value of 25mgKOH / 100mL, and stir at 55°C Deacidification for 60 minutes to obtain the first deacidification diesel suspension; the first deacidification diesel suspension is filtered to obtain the first deacidification diesel and naphthenic acid bentonite filter cake, and the first deacidification diesel returns to step 1 for the first deacidification. Secondary deacidification; the naphthenic acid bentonite filter cake is recovered with steam to recover residual diesel oil, dried and crushed to obtain n...

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PUM

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Abstract

The invention relates to a method for adsorption deacidification of diesel oil and production of bentonite naphthenate. The method is characterized in that the diesel oil is deacidified by calcium hydroxide-loaded active argil serving as an adsorbent and the adsorbent after deacidification is recycled at the same time so as to prepare the bentonite naphthenate, and specifically comprises the following steps of: adding the calcium hydroxide-loaded active argil into the primarily deacidified diesel oil, performing deacidification under stirring and filtering to obtain the finished diesel oil with the acid value of less than 2mg KOH / 100mL and a filter cake; adding the filter cake into the raw diesel oil with the acid value of 15 to 50mg KOH / 100mL, performing deacidification under stirring and filtering to obtain the primarily deacidified diesel oil and a bentonite naphthenate filter cake, and returning the primarily deacidified diesel oil for secondary deacidification; and recycling residual diesel oil from the bentonite naphthenate filter cake and drying and crushing the bentonite naphthenate filter cake to obtain the bentonite naphthenate with the organic content of 15 to 30 percent. Compared with the prior art, the method has the advantages that: the adsorbent is relatively cheap calcium hydroxide-loaded active argil, and the using amount of the adsorbent is below 1 percent. During the deacidification, the bentonite naphthenate is produced, and therefore the pollution of solid waste is avoided and certain economic benefits are made.

Description

technical field [0001] The invention relates to a method for refining diesel oil and preparing organic bentonite, in particular to a method for deacidifying diesel oil by using activated clay loaded with calcium hydroxide while producing naphthenic acid bentonite by-product. Background technique [0002] There is a small amount of naphthenic acid in straight-run diesel oil, which can only be used after deacidification and refining. At present, the deacidification methods of diesel mainly include liquid alkali neutralization method, hydrofining method, ammonia chemical extraction method and adsorption method. The alkali neutralization method is simple to operate, but it is easy to cause emulsification of oil products, which requires washing with water and demulsifiers, which not only increases the oil-water separation and wastewater treatment processes, but also makes the process complicated, serious pollution, and large oil loss; hydrofining and ammonia The chemical extract...

Claims

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Application Information

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IPC IPC(8): C10G25/06C10G25/12B01J20/12
Inventor 韦藤幼童张法吴炼陈燕萌丁泳锋冯琦
Owner GUANGXI UNIV
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