Patents Examined by Maria Reardon Nguyen
  • Aromatic conversion reactions with zeolitic catalyst composition of improved shape selectivity
    Patent number: 4899007
    Abstract: There are provided aromatic conversion reactions for preparation of dialkyl benzenes, such as xylene and ethyltoluene, of enhanced para isomer content with a zeolitic catalyst composition of improved shape selectivity. The catalysts comprise certain zeolites which have been calcined at a high temperature of at least 649.degree. C. (i.e., 1200.degree. F.). These zeolites have a silica/alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12. Examples of such zeolites include ZSM-5 and ZSM-11.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: February 6, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Pochen Chu, Francis G. Dwyer, Albert B. Schwartz
  • Lubricant compositions containing arylsulfonic acids, and organo phosphites and reaction products thereof
    Patent number: 4897209
    Abstract: Disclosed are lubricant compositions containing a lubricant and:(a) the reaction product of a metal dihydrocarbylaromatic sulfonate and a dialkyl or trialkyl phosphite; or(b) the reaction product of a metal dialkylnaphthalene sulfonate and a dialkyl or trialkyl phosphite and further containing an acid or acid supplying component; or(c) an unreacted mixture of dialkylnaphthalene sulfonic acid and a dialkyl or trialkyl phosphite.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: January 30, 1990
    Assignee: Mobil Oil Corp.
    Inventors: Derek A. Law, Shi-Ming Wu
  • Reaction products of alkenylsuccinic compounds with aromatic amines and hindered alcohols and lubricant and fuel compositions thereof
    Patent number: 4895579
    Abstract: Products made by reacting an alkenylsuccinic compound with an arylamine and a hindered alcohol provide superior dispersant and antioxidant activity to lubricant compositions when incorporated therein.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: January 23, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Harry J. Andress, Henry Ashjian