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Method of removing inorganic salt in sulfonate

A technology of sulfonate and inorganic salt, which is applied in the field of impurity removal of petroleum products, can solve the problems of petroleum sulfonate loss and increase cost, and achieve the goal of reducing sulfonate loss, low sulfonate loss, and high economic benefits Effect

Active Publication Date: 2016-07-27
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using this process for purification, a certain amount of petroleum sulfonate will also exist in the raffinate phase, which will cause a large loss of petroleum sulfonate, and a large amount of organic solvent remains in the sulfonate phase, which needs to be further removed, increasing the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment a

[0050] This embodiment provides a method for removing inorganic salts in sulfonates, comprising the following steps:

[0051] 1) Add the 10% neutralizer aqueous solution (sodium hydroxide solution) into the sulfonated acidic oil and stir for neutralization. The neutralization temperature is 40°C. Stop when the neutralization reaches a pH value of 7. Stir, keep the temperature at 60°C and stand until the layers are separated, and separate the neutralized sulfonate aqueous solution;

[0052] 2) Add a water-carrying agent (petroleum ether with a distillation range of 90°C) into the neutralized sulfonate aqueous solution according to a mass ratio of 0.5:1, and perform a dehydration operation (reflux dehydration) at 100°C to make the neutralized Dehydrate the reconciled sulfonate aqueous solution until the water content is less than 0.8%wt to obtain the dehydrated sulfonate;

[0053] 3) The dehydrated sulfonate is cooled to 40°C, and a physical adsorbent (clay) is taken according ...

Embodiment b

[0057] This embodiment provides a method for removing inorganic salts in sulfonates, comprising the following steps:

[0058] 1) Add an aqueous neutralizer solution (potassium hydroxide solution) with a mass concentration of 50% into the sulfonated acidic oil and stir for neutralization. The neutralization temperature is 70°C, and stop when the neutralization reaches a pH value of 8. Stir, keep the temperature at 80°C and stand until the layers are separated, and separate the neutralized sulfonate aqueous solution;

[0059] 2) Add a water-carrying agent (xylene with a distillation range of 120°C) into the neutralized sulfonate aqueous solution according to a mass ratio of 3:1, and perform a dehydration operation (dehydration under reduced pressure) at 160°C, so that the The neutralized sulfonate aqueous solution is dehydrated until the water content is less than 1% wt to obtain the dehydrated sulfonate;

[0060] 3) the dehydrated sulfonate is cooled to 100° C., and a physical...

Embodiment c

[0064] This embodiment provides a method for removing inorganic salts in sulfonates, comprising the following steps:

[0065] 1) Add the 20% neutralizer aqueous solution (ammonium hydroxide solution) into the sulfonated acidic oil and stir for neutralization. The neutralization temperature is 50°C. Stop when the neutralization reaches a pH value of 7.5 Stir, keep warm at 65°C and stand until the layers are separated, and the neutralized sulfonate aqueous solution is separated

[0066] 2) Add a water-carrying agent (petroleum ether with a distillation range of 100°C) into the neutralized sulfonate aqueous solution according to the mass ratio of 1:1, and perform dehydration operation (reflux dehydration) at 120°C to make the neutralized sulfonate solution Dehydrating the reconciled sulfonate aqueous solution to a water content of less than 1% wt to obtain a dehydrated sulfonate;

[0067] 3) cooling the dehydrated sulfonate to 60°C, taking a physical adsorbent (diatomaceous eart...

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PUM

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Abstract

Disclosed is a method of removing an inorganic salt in sulfonate; the method comprises the following steps: neutralizing sulfonated acidic oil with a neutralizing agent aqueous solution until the pH value is 7-8, and separating out the neutralized sulfonate aqueous solution; adding a water carrying agent, carrying out a dehydration operation, and dehydrating the sulfonate aqueous solution to the water content of less than 1 wt%; cooling the sulfonate after dehydration to 40 DEG C-100 DEG C, taking a physical adsorbent according to 0.1 wt%-5 wt% of the sulfonate, adding the physical adsorbent into the sulfonate after dehydration, and carrying out heat preservation stirring for 1-30 minutes, to obtain an adsorbent-containing sulfonate mixture; filtering the adsorbent-containing sulfonate mixture to obtain sulfonate, and testing the content of the inorganic salt in the sulfonate; and if the content of the inorganic salt is greater than or equal to 0.5 wt%, repeatedly filtering until the content of the inorganic salt in the sulfonate is less than 0.5 wt%. The higher efficacies of effective components in the sulfonate can be achieved.

Description

technical field [0001] The invention relates to a method for removing impurities from petroleum products, in particular to a method for removing inorganic salts in sulfonates. Background technique [0002] Petroleum distillates treated with oleum, sulfuric acid or SO 3 Sulfonation introduces sulfonic acid groups, and the mixture that is neutralized by alkali is petroleum sulfonate. In addition, petroleum sulfonate can also be synthesized by heavy alkylbenzene sulfonation, referred to as synthetic sulfonate. Among them, sodium sulfonate can be directly used as an antirust additive for oil products, and can also be made into neutral petroleum sulfonate calcium, magnesium, and barium salts through double decomposition process, and can be made into internal combustion engine oil detergent through carbonation reaction. With the development of the economy, the mechanical processing industry and the automobile industry are constantly developing. The amount of processing fluid us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C303/44C07C309/62
Inventor 牛春革白云周华方新湘朱海霞郭淑莲陈爱华
Owner PETROCHINA CO LTD
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