Effective non-polymeric and non-fouling additives for inhibiting high temperature naphthenic acid corrosion and methods of use thereof
A non-polymer, corrosion-inhibiting technology, applied in the composition of drilling holes, corrosion/fouling inhibition of treatment equipment, separation methods, etc., can solve problems such as side-stream contamination of distillates
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Embodiment 1
[0066] To a clean four necked round bottom flask kept in a 30°C oil bath was added 733.4 gm of 2-ethyl-hexanol and a nitrogen purge was initiated. A total of 266.5 gm of phosphorus pentoxide was added to the flask in six portions. After adding phosphorus pentoxide to the flask, an exotherm was observed. After the phosphorus pentoxide addition was complete, the temperature of the reaction mixture was raised to 99°C and maintained at this temperature for 4 hours.
[0067] The reaction mixture was cooled to 30°C-35°C, filtered, and analyzed for acid number and phosphorus content by inductively coupled plasma (ICP) method.
[0068] The acid number was found to be in the range of 280 to 330 mg KOH / gm. Typical acid value is 308mgKOH / gm. Phosphorus content is in the range of 10 to 12%. A typical phosphorus content value is 11.65%. The reaction mixture obtained in Example 1 is a prior art naphthenic acid corrosion inhibiting additive. The test results of Example 1 are given in T...
Embodiment 2
[0070] Into a clean four necked round bottom flask kept in an oil bath at 30°C was added 200 gm of the reaction mixture of Example 1. 150 gm of butylene oxide was slowly added to the reaction mixture. An exotherm was observed and the temperature was maintained below 40°C until a total of 150 gm of butylene oxide addition was complete. Samples of the resulting chemical mixture were taken intermittently and analyzed for acid value. The reaction was continued until the acid number was 10 mgKOH / gm.
[0071] The resulting reaction mixture was then heated to a temperature of 60° C. and kept at this temperature for 2 hours.
[0072] The resulting reaction mixture was cooled to 30°C-35°C, filtered, and analyzed by ICP method for acid value and phosphorus content.
[0073] The acid number was found to be less than 10 mg KOH / gm. A typical acid number is 1 mg KOH / gm. Phosphorus content is in the range of 5 to 7%. A typical phosphorus content value is 6.53%. The reaction mixture ob...
Embodiment 3
[0075] To a clean four necked round bottom flask kept in a 30°C oil bath was added 486 gm of 2-ethyl-hexanol and a nitrogen purge was initiated. A total of 265 gm of phosphorus pentoxide was added to the flask in six portions. After adding phosphorus pentoxide to the flask, an exotherm was observed. After the phosphorus pentoxide addition was complete, the temperature of the reaction mixture was raised to 99°C and maintained at this temperature for 4 hours.
[0076] The reaction mixture was cooled to room temperature of 30°C, filtered, and analyzed by ICP method for acid value and phosphorus content.
[0077] The acid number was found to be in the range of 320 to 350 mg KOH / gm. Typical acid value is 331mgKOH / gm. Phosphorus content is in the range of 14 to 16%. A typical phosphorus content value is 15.408%. The reaction mixture obtained in Example 3 is a prior art naphthenic acid corrosion inhibiting additive. The test results of Example 3 are given in Table 1.
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