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Method for removing inorganic salts from petroleum sulfonates

A technology from sulfonate and inorganic salt, applied in sulfonate preparation, sulfonic acid preparation, chemical instruments and methods, etc., can solve the problems of sulfonate yield reduction, increase cost, difficulty, etc., and reduce energy consumption , The effect of saving production cost and simple process

Active Publication Date: 2018-09-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method needs to add a certain amount of adsorbent, which will increase the cost. At the same time, it will inevitably absorb a part of sulfonate during the adsorption process, resulting in a decrease in the yield of sulfonate.
Coupled with increasingly stringent environmental protection requirements, it is also a difficult task to deal with the waste adsorbent after use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Demineralization of paraffin-based sulfonate.

[0024] The paraffin-based reduced second-line feedstock oil is sulfonated with gas sulfur trioxide, and the sulfonated acid oil is naturally sedimented. The sedimentation time is 48 hours and the sedimentation temperature is normal temperature. After the acid residue has settled completely, the acid oil has a clear brown-red color. At this time, the spray process is used to blow off the residual SO in the acid oil with compressed air 3 The volume ratio of gas, compressed air and acid oil inlet is 5000:1, and the temperature is normal. When the gas outlet is detected to pH 6.5 with wet pH test paper, the ventilation is ended. After the above treatment, the acid oil is neutralized with 5% sodium hydroxide, and the solution is neutralized to a pH of 7. At this time, the sulfonate aqueous solution was analyzed for inorganic salt in accordance with the GB / T6366-92 standard, and the inorganic salt content was 0.47% by w...

Embodiment 2

[0025] Example 2 Demineralization of paraffin-based minus first-line sulfonate.

[0026] The paraffin-based minus first-line feedstock oil is sulfonated with gaseous sulfur trioxide, and the sulfonated acid oil undergoes natural sedimentation. The sedimentation time is 48 hours and the sedimentation temperature is 50°C. After the acid residue has settled completely, the acid oil has a clear brown-red color. At this time, the spray process is used to blow off the residual SO in the acid oil with compressed air 3 The volume ratio of gas, compressed air and acid oil inlet is 3000:1, and the temperature is 50°C. When the gas outlet is detected to pH 7 with wet pH test paper, the ventilation is terminated. The acid oil after the above treatment is neutralized with 15% sodium hydroxide, and the pH of the solution is 7.5. At this time, the sulfonate aqueous solution was analyzed for inorganic salt in accordance with the GB / T6366-92 standard, and the inorganic salt content was 0.41wt%....

Embodiment 3

[0027] Example 3 Demineralization of paraffin-based sulfonate.

[0028] The paraffin-based reduced second-line feedstock oil is sulfonated with gaseous sulfur trioxide, and the sulfonated acid oil undergoes natural sedimentation. The sedimentation time is 48 hours and the sedimentation temperature is 80°C. After the acid residue has settled completely, the acid oil has a clear brown-red color. At this time, the spray process is used to blow off the residual SO in the acid oil with compressed air 3 The volume ratio of gas, compressed air and acid oil inlet is 20:1, and the temperature is 80°C. When the gas outlet is detected to pH 7.5 with wet pH test paper, the ventilation is ended. The acid oil after the above treatment is neutralized with 25% sodium hydroxide, and the pH value of the solution is 8. At this time, the sulfonate aqueous solution was analyzed for inorganic salt in accordance with the GB / T6366-92 standard, and the inorganic salt content was 0.38 wt%.

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Abstract

The invention discloses a method for removing inorganic salts from mahogany petroleum sulfonate. The method comprises the following steps: sulfonating raw oil to obtain acidic oil, settling the acidic oil until the acidic oil is completely settled, introducing compressed air or vacuumizing to remove residual SO3 gas, then neutralizing until the pH value is 7 to 8, separating a sulfonate aqueous solution and residual oil, wherein the content of inorganic salts in the sulfonate aqueous solution is lower than 0.5%wt, and dehydrating the sulfonate aqueous solution to obtain a qualified product. According to the method, the generation of inorganic salts in the sulfonate is inhibited from the source, and a step of removing the inorganic salts in the subsequent process is avoided. No chemical reagent is added in the settling and degassing process, the energy consumption is reduced, the production cost is saved, the process is simple, and no additional influence is produced for the environment. The mahogany petroleum sulfonate produced by the method is transparent in appearance and shallow in color, and the content of the inorganic salts is decreased to 0.5 percent or less.

Description

Technical field [0001] The present invention relates to a method for refining petroleum sulfonate, in particular to a method for removing inorganic salt in sulfonate. Background technique [0002] Petroleum distillate oil after fuming sulfuric acid, sulfuric acid or SO 3 Sulfonation introduces sulfonic acid groups and is neutralized by alkali, namely petroleum sulfonate. In addition, petroleum sulfonate can also be prepared by sulfonation of heavy alkylbenzene, referred to as synthetic sulfonate. Among them, sodium sulfonate can be directly used as an anti-rust additive for oil products, and can also be made into neutral petroleum sulfonate calcium, magnesium, and barium salts through a double decomposition process, and can continue to be made into internal combustion engine oil detergent through carbonation reaction. With economic development, the machinery processing industry and the automobile industry are constantly developing. The amount of processing fluid in these indust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/62C07C303/32C07C303/44
CPCC07C303/06C07C303/32C07C303/44C07C309/62
Inventor 白云牛春革方新湘周华朱海霞
Owner PETROCHINA CO LTD
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