Abstract:
SULFURIZED TRIISOBUTYLENE, LUBRICATING OIL COMPOSITIONS THEREOF HAVING IMPROVED EXTREME PRESSURE PROPERTIES AND REDUCED COPPER CORROSIVITY, AND METHOD OF MANUFACTURE OF SAID SULFURIZED TRIISOBUTYLENE COMPRISING THE SEQUENTIAL STEPS: (1) FORMING A MIXTURE OF TRIISOBUTYLENE AND SULFUR UTILIZING A MOLE RATIO OF TRIISOBUTYLENE TO SULFUR OF BETWEEN ABOUT 1:2.5 AND 1:5 AT BETWEEN ABOUT 50 AND 100* 100*F., (2) CONTINUOUSLY BLOWING THE RESULTANT MIXTURE WITH AN INERT GAS AT A RATE OF BETWEEN ABOUT 0.1 AND 1 S.C.F.G./GALLON MIXTURE AT A TEMPERATURE BETWEEN ABOUT 375 AND 465*F. UNDER A CONTINUOUS PRESSURE OF BETWEEN ABOUT 20 AND 100 P.S.I.G. UNTIL THE FREE SULFUR CONTENT IN SAID RESULTANT REACTION MIXTURE IS LESS THAN 0.3 WT. PERCENT; (3) STRIPPING THE BLOWN MIXTURE WITH INERT GAS AT A RATE OF BETWEEN ABOUT 0.1 AND 1 S.C.F.G./GALLON AT A TEMPERATURE OF BETWEEN ABOUT 320 AND 360*F. AT SUBATMOSPHERIC PRESSURE; AND (4) FILTERING THE STRIPPED PRODUCT.
Abstract:
A hydrocracking process for the conversion of heavy hydrocarbon oils using a catalyst containing a hydrogenating component and a cracking component which latter is composed of a modified crystalline zeolite and at least one amorphous inorganic oxide. The process is particularly adapted to hydrocrack charge stocks which are traditionally difficult to hydrocrack such as those having a high nitrogen content, a high polycyclic aromatic content or a Conradson Carbon Residue of at least 1 percent.
Abstract:
The strength of acid in an alkylation unit is controlled by a system using a signal corresponding to the anticipated demand on the acid by the reaction of olefin and isoparaffin in the presence of the acid. The reaction weakens the acid so that it is necessary to replace some of the weakened acid with fresh acid to maintain a desired acid strength. The control system includes apparatus sampling the olefin and isoparaffin entering the alkylation unit which provides a signal corresponding to the percent volume of acid degrading constituents formed during alkylation. A water analyzer samples the olefin and isoparaffin and provides a signal corresponding to their water content. Signals corresponding to sensed flow rates of fresh and discharged acid entering and leaving, respectively, the alkylation unit and of the olefin and isoparaffin are provided by sensors. A control circuit using analog computers develop the control signal in accordance with the signals from the sensors, the volume signal and the signal from the analyzer and equations hereinafter disclosed. The control signal is applied to a flow recorder controller which controls the flow rate of the fresh acid entering the alkylation unit so as to maintain the desired acid strength.