초록 ▼

Heavy hydrocarbon oils of high paraffin content are catalytically cracked using zeolite beta. The paraffin content of the oil is at least 20 weight percent or higher. The gasoline cracking products have a high octane rating and the higher boiling products a decreased pour point resulting from the de

Heavy hydrocarbon oils of high paraffin content are catalytically cracked using zeolite beta. The paraffin content of the oil is at least 20 weight percent or higher. The gasoline cracking products have a high octane rating and the higher boiling products a decreased pour point resulting from the dewaxing activity of the zeolite beta. The use of cracking temperatures above 500°C., preferably above 550°C., also improves iso-butene production.

대표청구항 ▼

A process for improving the gasoline yield and octane rating of the gasoline boiling range (C5-330°F.) product produced by the catalytic cracking of a highly paraffinic feedstock and alkylation of the iso-butene fraction produced in the cracking to produce an improved quantity of gasoline boiling ra

A process for improving the gasoline yield and octane rating of the gasoline boiling range (C5-330°F.) product produced by the catalytic cracking of a highly paraffinic feedstock and alkylation of the iso-butene fraction produced in the cracking to produce an improved quantity of gasoline boiling range hydrocarbons comprising catalytically cracked gasoline and alkylate, which comprises: (i) contacting a feedstock having an initial boiling point above about 345°C. and comprising at least 40 weight percent paraffins with a circulating cracking catalyst comprising zeolite beta which includes no metal components in excess of 1000 ppmw at a temperature over 500°C. and in the absence of added hydrogen at a pressure of not more than 1000 kPa and a catalyst:oil ratio of 0.1:1-10:1 by weight to produce cracking products at conversion to lower boiling product of at least 50 weight percent, the cracking products including gasoline, butene and iso-butene; (ii) separating the cracking products; (iii) continuously regenerating the catalyst on a cyclic basis by oxidative removal of the carbon deposited on the cracking catalyst during the cracking; (iv) separating the cracking products to form a fraction containing an enhanced quantity of iso-butene, a gasoline boiling range fraction and a low pour point fraction boiling above the gasoline fraction; (v) producing alkylate from the iso-butene fraction to form an improved yield of a high octane rating alkylate fraction.