초록 ▼

Dewaxed lube base stock oil which forms a wax haze on storage at a temperature above its cloud point is treated by contacting the oil and hydrogen with a zeolite catalyst such as ZSM-5 to eliminate the wax-haze formation. The method may be used to reclaim wax-contaminated lube base stock oils and ot

Dewaxed lube base stock oil which forms a wax haze on storage at a temperature above its cloud point is treated by contacting the oil and hydrogen with a zeolite catalyst such as ZSM-5 to eliminate the wax-haze formation. The method may be used to reclaim wax-contaminated lube base stock oils and other wax-contaminated hydrocarbon oils.

대표청구항 ▼

A method for reclaiming a contaminated dewaxed lube base stock oil with an excessive tendency to form particulate wax when kept at a predetermined storage temperature, which method consists of: contacting said dewaxed oil and hydrogen in a single reaction zone at a temperature of 500°to 675°F., a hy

A method for reclaiming a contaminated dewaxed lube base stock oil with an excessive tendency to form particulate wax when kept at a predetermined storage temperature, which method consists of: contacting said dewaxed oil and hydrogen in a single reaction zone at a temperature of 500°to 675°F., a hydrogen partial pressure of about 100 to 1500 psia, and at a space velocity higher than 2 up to about 10 LHSV with a catalyst comprising a crystalline aluminosilicate zeolite having a silica/alumina ratio of at least 12 and a Constraint Index of about 1 to about 12; and recovering at least 95 wt.% of a reclaimed lube base stock oil having a pour point not more than 20°F. lower than said contaminated oil, and which forms substantially no particulate wax at said storage temperature.