JPH1017539A - Production of liquid paraffin and petroleum sulfonic acid salt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for the production of a liquid paraffin and a petroleum sulfonic acid salt, enabling arbitrary adjustment of the production ratio of the petroleum sulfonic acid salt to the liquid paraffin, causing little side reaction and capable of improving the yield and hue of the petroleum sulfonic acid salt. SOLUTION: A liquid paraffin and a petroleum sulfonic acid salt having improved hue can be produced in high yield by mixing a lubricating oil having high aromatic component content with a process oil having low aromatic component content and sulfonating the mixture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is used for liquid paraffins and emulsifiers, rust inhibitors, detergents and dispersants which are useful as plasticizers, mold release agents, internal lubricants, extrusion aids, cosmetics, pharmaceutical aids, etc. And a method for producing a petroleum sulfonate.

[0002]

2. Description of the Related Art Liquid paraffin is defined as "a mixture of liquid saturated hydrocarbons of extremely high purity, which belongs to a lubricating oil fraction in terms of boiling point". At present, a general production method is a sulfonation method. The quality and yield of the product depend on the components. On the other hand, sodium petroleum sulfonate is produced at the same time as the production of liquid paraffin by the above-mentioned sulfonation method.However, the production ratio of petroleum sodium sulfonate to liquid paraffin is determined by the aromatic component in the lubricating oil as the raw material oil, In order to increase the production ratio of petroleum sodium sulfonate to liquid paraffin, it is necessary to sulfonate a lubricating oil having a high aromatic component content. However, in such a case, a large excess of the sulfonating agent is required, so that a side reaction is likely to occur, causing problems such as deterioration of the hue of petroleum sulfonic acid sodium salt.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to control the production ratio of petroleum sulfonate sodium salt to liquid paraffin arbitrarily, to improve the yield of petroleum petroleum sulfonate sodium salt with less side reactions, An object of the present invention is to provide a method for producing liquid paraffin and sodium petroleum sulfonic acid capable of improving hue.

[0004]

SUMMARY OF THE INVENTION The present invention provides a petroleum oil having an improved hue by mixing liquid paraffin and a hue by mixing a lubricating oil having a high aromatic content with a process oil having a low aromatic content. The present invention relates to a method for producing liquid paraffin and petroleum sulfonate, wherein the sulfonate is obtained in high yield. The present invention also provides a neutral oil obtained by neutralizing an acidic oil obtained after sulfonation of a mixture of a lubricating oil having a high aromatic component content and a process oil with an aqueous solution of an alkali lower alcohol to extract a sulfonate. The present invention relates to a method for producing a liquid paraffin and a petroleum sulfonate which are circulated to a reaction tank, mixed with a feedstock oil having a high aromatic component content, and sulfonated.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a lubricating oil having a high aromatic component content and a process oil are mixed so that the lubricating oil has a medium aromatic component content. Specifically, 10 to 30 parts by weight of process oil is added to 100 parts by weight of a lubricating oil containing a high aromatic component.
0 parts by weight, preferably 20 to 100 parts by weight. Here, the lubricating oil having a high content of aromatic components includes aromatic components in a range of 15% or more in column chromatography analysis, and ri-VG
% CA 5.8 or more by the method C, lubricating oil contained in the aromatic component refers to a content of the above aromatic component in a ratio of less than 10 to 15%, and the% CA 5.2 to 5.8 by the ri-VGC method. Less than The process oil is obtained by a sulfonation reaction, lubricating oil refining, or the like, and generally has a composition of less than 1% CA by the ri-VGC method.
The mixed lubricating oil is reacted with the gasified sulfonating agent to separate the acidic oil and the waste acid, and the acidic oil is neutralized and extracted with a mixed solution of alkali, lower alcohol and water. Here, as the sulfonating agent, it is preferable to use sulfuric anhydride, fuming sulfuric acid, or the like,
The sulfonation reaction is preferably performed at about 45 to 55 ° C. for about 1 to 2 hours. Acidic oils include oil-soluble petroleum sulfonic acids and the like, and waste acids include sulfuric acid and non-oil-soluble sulfonated products. The acidic oil and the waste acid are separated by standing. Ethanol, butanol, etc. are used as lower alcohols used for neutralization extraction of acidic oil, and sodium hydroxide, sodium carbonate, etc. are used as alkalis. Extraction residual oil is neutralized by evaporation under normal pressure and reduced pressure to remove water and solvent. A part of the obtained neutral oil may be circulated to the reaction tank, whereby the ratio between the liquid paraffin and the petroleum sulfonate can be arbitrarily adjusted. It is preferable to adjust the circulation amount of the neutral oil so as to be 10 to 300 parts by weight, preferably 20 to 100 parts by weight with respect to 100 parts by weight of the feedstock oil. The neutral oil is further purified by sulfonation, neutralization extraction, and adsorption treatment using activated clay to obtain liquid paraffin. Further, the extract can be obtained by extracting a sulfonate from a hydroalcoholic layer with a solvent such as benzene or toluene and evaporating the solvent to obtain a petroleum sulfonate.

[0006]

The present invention will be described more specifically with reference to the following examples. Example 1 Lubricating Oil A High in Aromatic Components [Density (15/4 ° C.) 0.8]
59, kinematic viscosity 40 ° C., 16 cSt, average molecular weight 300,%
CA 8.2] 300 ml of process oil A [density (15/4
° C) 0.846, kinematic viscosity 40 ° C 16 cSt, average molecular weight
300,% CA 1 or less], and mix with 700 ml of% CA.
Adjust to 0 and gradually add gaseous sulfuric anhydride. After the reaction temperature is maintained at 45 to 50 ° C and the sulfonating agent is added,
Aged while maintaining the same temperature. After removing the waste acid, dilute the acidic oil with an aqueous ethanol solution and add p with an aqueous sodium hydroxide solution.
It was adjusted to H8-9 and allowed to stand for separation. The upper and lower layers were purified as before to obtain liquid paraffin and petroleum sulfonic acid sodium salt. Table 1 shows the results of the reaction generation rate and the hue of petroleum sulfonic acid sodium salt. Compared with the conventional method, the yield of petroleum sulfonic acid sodium salt is improved, and the hue of petroleum sulfonic acid sodium salt is improved.

Example 2 Using 300 ml of lubricating oil A having a high aromatic component content and 700 ml of process oil A, after sulfonation was completed in the same manner as in Example 1,
Aged while maintaining the same temperature. After removing the waste acid, dilute the acidic oil with an aqueous ethanol solution and add p with an aqueous sodium hydroxide solution.
It was adjusted to H8-9 and allowed to stand for separation. The lower layer was purified as usual to obtain petroleum sulfonic acid sodium salt. 700ml of upper layer
Was circulated to the reaction tank, and mixed with 300 ml of lubricating oil A to continue the sulfonation reaction. The remaining upper layer was purified as usual to obtain liquid paraffin. Table 1 shows the results of the reaction generation rate and the hue of petroleum sulfonic acid sodium salt. Compared with the conventional method, the yield of petroleum sulfonic acid sodium salt is improved, and the hue of petroleum sulfonic acid sodium salt is improved.

[0008]

[Table 1] * 1 Content 64% * 2 (ASTM dil) * 3 Lubricant A converted to 1000ml

Example 3 Lubricating oil B high in aromatic components [density (15/4 ° C.) 0.8]
72, kinematic viscosity 40 ° C. 78 cSt, average molecular weight 410,%
CA 5.0] 900 ml and process oil B [density (15/4
° C) 0.868, kinematic viscosity 40 ° C 80 cSt, average molecular weight
415,% CA 1 or less] and mix with 100 ml of% CA.
The reaction temperature was adjusted to 7 and the reaction temperature was maintained at 45 to 50 ° C. in the same manner as in Example 1. After the addition of the sulfonating agent was completed, the mixture was aged while maintaining the same temperature. After removing the waste acid, the acidic oil was diluted with an aqueous propanol solution, adjusted to pH 8 to 9 with an aqueous sodium hydroxide solution, and allowed to stand for separation. Table 2 shows the results of the reaction generation rate and the hue of petroleum sulfonic acid sodium salt. Compared with the conventional method, the yield of petroleum sulfonic acid sodium salt is improved, and the hue of petroleum sulfonic acid sodium salt is improved.

Example 4 900 ml of lubricating oil B having a high content of aromatic components and 100 ml of process oil B were used, and after completion of sulfonation as in Example 3, aging was performed while maintaining the same temperature. After removing the waste acid, the acidic oil was diluted with an aqueous ethanol solution, adjusted to pH 8 to 9 with an aqueous sodium hydroxide solution, and allowed to stand for separation. The lower layer was purified as usual to obtain petroleum sulfonic acid sodium salt. Upper 10
0 ml was circulated to the reaction tank and mixed with 900 ml of lubricating oil B to continue the sulfonation reaction. The remaining upper layer was purified as usual to obtain liquid paraffin. Table 2 shows the results of the reaction generation rate and the hue of petroleum sulfonic acid sodium salt. Compared with the conventional method, the yield of petroleum sulfonic acid sodium salt is improved, and the hue of petroleum sulfonic acid sodium salt is improved.

[0011]

[Table 2] * 1 Content 64% * 2 (ASTM dil) * 3 Lubricant B converted to 1000 ml

[0012]

According to the present invention, the yield of liquid paraffin and petroleum sulfonate can be reduced by mixing a lubricating oil containing a large amount of aromatic components with a process oil, diluting the lubricating oil equivalent to the lubricating oil contained in the aromatic components, and performing a sulfonation reaction. To improve the hue of the petroleum sulfonate. According to the present invention, a lubricating oil having a high aromatic component, which is difficult to treat by the conventional method, can be treated, and the range of choice of the feedstock oil has been widened. Furthermore, in the conventional method, the production ratio of liquid paraffin and petroleum sulfonate to the feedstock was constant, but it was possible to adjust the production ratio corresponding to the sales ratio by selecting the feedstock and adjusting the circulation amount of neutral oil. became.

Claims (3)

[Claims] 1. A high yield of petroleum sulfonate having improved liquid paraffin and hue by mixing a lubricating oil having a high aromatic component content with a process oil having a low aromatic component content and sulfonating the mixture. A process for producing liquid paraffin and petroleum sulfonic acid salt, characterized by being obtained by: 2. A neutral oil obtained by neutralizing an acidic oil obtained after sulfonating a mixture of a lubricating oil and a process oil having a high aromatic component content with an aqueous solution of an alkali lower alcohol to extract a sulfonate. The method for producing liquid paraffin and petroleum sulfonate according to claim 1, wherein a part of the liquid paraffin and petroleum sulfonate are circulated to a reaction tank, mixed with a feedstock oil having a high aromatic component content, and sulfonated. 3. The method according to claim 2, wherein the circulating mixing ratio of the neutral oil is 10 to 300 parts by weight based on 100 parts by weight of the base oil.