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US 4,062,762 AGranted
Process for desulfurizing and blending naphtha
OwnerKent A. Howard, William E. Winter, Jr. +2inventors
InventorsKent A. Howard, William E. Winter, Jr., Karsten H. Moritz, John D. Paynter
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Abstract
A sulfur-containing naphtha is separated into at least three fractions. Each fraction is desulfurized separately by a different desulfurization method. Subsequently, the desulfurized fractions are recombined. The intermediate boiling point naphtha fraction is desulfurized by an alkali metal desulfurization process, preferably in the presence of added hydrogen.
Claims14
A process for desulfurizing a sulfur-containing naphtha, which comprises the steps of:
- a. separating said naphtha into at least a lower boiling fraction, an intermediate boiling fraction and a higher boiling fraction;
- b. contacting said intermediate boiling fraction with an alkali metal to desulfurize said fraction;
- c. contacting said higher boiling fraction with hydrogen and a hydrodesulfurization catalyst to hydrodesulfurize said fraction;
- d. recovering desulfurized products from step (b) and step (c), and
- e. blending the desulfurized products recovered in step (d) and said lower boiling fraction to produce a low sulfur content naphtha.
2 more elements
A process for desulfurizing a sulfur-containing naphtha, which comprises the steps of:
- a. separating said naphtha into at least a lower boiling fraction, an intermediate fraction and a higher boiling fraction;
- b. desulfurizing said lower boiling fraction to reduce the mercaptan content thereof;
- c. contacting said intermediate fraction with an alkali metal to desulfurize said fraction, said alkali metal being present in an amount of less than 1 weight percent, based on said intermediate fraction, and with added hydrogen, the hydrogen partial pressure being maintained in the range from about 100 to about 200 psig, at a temperature ranging from about 450.degree. to 650.degree. F.;
- d. contacting said higher boiling fraction with hydrogen and a hydrodesulfurization catalyst to desulfurize said fraction;
- e. recovering desulfurized products from step (b), step (c) and step (d), and
- f. blending the desulfurized products recovered in step (e) to produce a low sulfur-content naphtha.
3 more elements
Dependencies are inferred from the claim text.