Mineral Oil Refining Process (Patent No: 421573)

Inventor: Huggett, Jack L. (assignor)

Location: Calgary

Comments: N/A

Description: 1. Process for the production of high quality motor fuels of increased stability from petroleum oil fractions boiling in the range below about 420°F., said petroleum oil fractions having a relatively low sulfur content and being of the character that they would not be subjected to treatment with sulfuric acid for the reduction of sulfur comprising segregating said petroleum oil into a relatively high boiling fraction and into a relatively low boiling fraction, subjecting said relatively high boiling fraction to treatment with sodium carbonate solution and subjecting said low boiling fraction to treatment with a stronger solution of sodium hydroxide, separating the treated oils from the respective treating agents and blending the same for the production of said high quality motor fuel.

2. Process in accordance with claim 1 in which the sulfur content of said feed oil is in the range below about 0.1%.

3. Process for the production of high quality motor fuels of increased stability from petroleum oils boiling in the range below about 420°F. and containing naturally occurring inhibitors, comprising segregating said petroleum oils into a fraction polling in the range from about 100°F. to 225°F. and into a fraction boiling in the range from about 225°F. to 420°F., treating said relatively low, boiling fraction with an alkali metal hydroxide solution under conditions to remove objectionable mercaptan compounds, treating said relatively high boiling fraction with a weaker solution of an alkali metal carbonate under conditions to remove objectionable sulfur compounds without materially affecting said naturally occurring inhibitors, combining the treated fractions whereby a motor fuel of relatively low sulfur content and increased stability is secured.

4. Process in accordance with claim 3 in which said alkali metal is sodium.

5. A process for producing stable hydrocarbon oils boiling within the motor fuel boiling range which comprises separating a hydrocarbon oil into a relatively high boiling fraction and a relatively low boiling fraction, treating the relatively low boiling fraction with a sodium hydroxide solution of about 20° to 30°Be. concentration, treating the relatively high boiling fraction , with a sodium carbonate solution of about 10° to 20° Be., concentration and blending the treated fractions to obtain a motor fuel of relatively low sulfur content and increased stability.

6. Process for the production of improved petroleum oils boiling in the motor fuel range from hydrocarbon oils of low sulfur content containing natural inhibitors and requiring no treatment with sulfuric acid for the reduction of the sulfur content, comprising segregating a relatively low boiling fraction and a relatively high boiling fraction, subjecting said low boiling fraction to treatment with a relatively strong alkali metal hydroxide solution, treating said relatively high boiling fraction with a weaker alkali metal carbonate solution and blending the treated fractions.

7. Process according to claim 6, in which said relatively low boiling fraction boils in the range below about 250°F. and in which said relatively high boiling fraction boils in the range above about 250°F.

8. Process for the production of hydrocarbon oils of increased stability from hydrocarbon oils of low sulfur content boiling in the range from about 225 to 400°F., containing natural inhibitors and requiring no treatment with sulfuric acid for the reduction of the sulfur content, comprising treating said oil with an aqueous 10 to 20°Be. solution of sodium carbonate.