Abstract:
1. A PROCESS FOR PREPARING A SYNTHETIC PETROLATUM WHICH INVOLVES PASSING ALPHA OLEFINS HAVING 30 OR MORE CARBON ATOMS OVER SILICA ALUMINA AT A TEMPERATURE OF ABOUT 200* TO ABOUT 260*C.
Abstract:
A method for reactivating the catalyst used in the mild hydrotreating of petroleum crude scale wax comprises contacting the catalyst with the feedstream at a temperature in excess of the normal operating temperature for the particular feedstream for a time sufficient to reactivate the catalyst and produce effluent having satisfactory color and stability characteristics. Operation at a temperature in excess of the normal operating temperature may follow conventional air-stream catalyst regeneration.
Abstract:
A catalyst and process are described for hydrofining petroleum wax comprising contacting the wax with hydrogen in the presence of a catalyst comprising at least one metal hydrogenating component on a porous alumina/silica carrier containing from about 0.2 to 5 wt.% of an alkali metal component, the catalyst having a specific surface area of about 200 to 300 m.sup.2 /g and being further characterized in that (a) the volume of pores having a diameter in the range of 60 to 150 A is greater than 80% of the volume of pores having a diameter in the range of 0 to 150 A and (b) the volume of pores having a diameter in the range of 0 to 600 A is in the range of about 0.45 to 0.60 ml/g.
Abstract:
The molecular weight of a solid paraffin wax having an oil content of no more than about 2% by weight is increased by contacting the wax at elevated temperature with at least about 5% by weight of an organic peroxide.
Abstract:
Previously, waxy crude oils have been fractionated into a wax fraction and a liquid fraction; the wax fraction formed into particles and slurried into the liquid fraction for transportation in pipelines. Particle stability is enhanced by extruding molten wax without substantial crystalline structure into a hot wax immiscible fluid flowing cocurrent to the extruded wax and under conditions which will quickly form a smooth shell, and thereafter cooling to form hard, smooth spheres which resist mechanical degradation and which further approach a stabilized, or maximum, pressure drop at a slower rate than non-hardened particles. This treatment results in a particle which can be pumped in a pipeline at heavier particle loadings or with less pressure.
Abstract:
THIS INVENTION RELATES TO A PROCESS FOR PRODUCING POWDERED PARAFFIN WAX, CHARACTERIZED BY COMPRISING THE STEPS OF HEATING THE LIQUID PARAFFIN WAX TO A TEMPERATURE BETWEEN 50*C. AND 70*C., SPRAYING THE LIQUID PARAFFIN WAX INTO A HIGH VELOCITY FLOW OF COLD AIR, MAINTAINING THE MIXTURE UNTIL THE PARAFFIN WAX SOLIDIFIES, AND SEPARATING THE POWDERED PARAFFIN WAX FROM THE AIR, DISCHARGING THE PARAFFIN WAX FOR FURTHER OPERATIONS.
Abstract:
High melting, deoiled and mildly deasphalted tank bottoms wax is catalytically refined in two stages using a catalyst comprising nickel molybdate on alumina. The first stage is maintained at a temperature at least about 50.degree. F. higher than the second stage and the temperature in the second stage is allowed to go no higher than about 575.degree. F. Hydrofined wax product from the second stage is recycled back into same and the temperature in the first stage is periodically increased in order to counteract deactivation of the catalyst. By using a judicious combination of process conditions, unrefined high melting tank bottoms microwax stocks can be made into high quality, high melting point microwax having excellent color and meeting FDA purity requirements.
Abstract:
In the process of manufacturing a refrigeration oil where an oil stock is dewaxed by forming a complex with urea in the presence of an activator, the improvement of adding hot vacuum gas oil to the separated urea complex whereby the activator is flashed off and is recycled for reuse and the slurry of the urea complex in the gas oil is treated with hot water to break the adduct and separate a water-urea mixture and oil and paraffin. The improved method enables accurate and uniform temperature control and degradation of urea is suppressed.
Abstract:
Aromatic compounds can be separated from slack wax in a continuous cyclic process using a macroporous metal ion loaded cation exchange resin involving successive steps of adsorption, purge, desorption and purge.