Abstract:
THE RESISTANCE TO CREEP IS SUBSTANTIALLY IMPROVED IN BLOCK COPOLYMERS WHICH ARE SELECTIVELY HYDROGENATED AND HAVE WITHIN THE SAME BLOCK COPOLYMERIC MOLECULES NONELASTOMERIC BLOCKS A AND C AND ELASTOMERIC BLOCKS B WHEREIN, PRIOR TO HYDROGENATION, BLOCKS A ARE HOMOPOLYSTYRENE BLOCKS, BLOCKS B ARE CONJUGATED DIENE POLYMER BLOCKS AND BLOCKS C ARE HOMOPOLYMER BLOCKS OF ALPHA METHYL STYRENE; AND DUE TO HYDROGENATION, NO MORE THAN ABOUT 25% OF THE DOUBLE BONDS IN BLOCKS A AND C ARE REDUCED AND AT LEAST 90% OF THE ALIPHATIC DOUBLE BONDS OF BLOCKS B ARE REDUCED.
Abstract:
A CATALYST FOR INCREASING THE RATE OF HYDROGENATION REACTIONS INCLUDING A COMPLEX SALT OF THE CHLORIDE, BROMIDE OR IODINE OF ZINC, TIN, ANTIMONY, BISMUTH, CADMIUM, GALLIUM, MERCURY OR ARSENIC, AND THE CORRESPONDING AMMONIUM HALIDE.
Abstract:
Very high-boiling hydrocarbon, such as petroleum residue, is converted to low-boiling liquid products by passing it through a continuous phase of a catalyst system selected from antimony trichloride, tribromide or triiodide; bismuth trichloride or tribromide; or arsenic triiodide; maintained at a temperature between 200* and 550* C. and under hydrogen partial pressure of at least 250 p.s.i. whereby the catalyst system performs the functions of acting as a hydrogenation catalyst, acting as a cracking catalyst, and providing a medium for maintaining the reactants in suitable relation to one another to promote reactions and obtain beneficial product distribution.
Abstract:
BLOCK COPOLYMERS HAVING LOW MELT VISCOSITY AND IMPROVED PROCESSABILITY COMPRISE SELECTIVELY HYDROGENATED BLOCK COPOLYMERS COMPRISING A AND B, NON-ELASTOMERIC BLOCK A BEING SUBSTANTIALLY NON-HYDROGENATED HOMOPOLYMER BLOCKS OF MONO ALPHA ALKENYL ARENES AND ELASTOMERIC BLOCKS B BEING RANDOM COPOLYMER BLOCKS OF MONO ALPHA ALKENYL ARENES AND CONJUGATED DIENES WHEREIN AT LEAST 90% OF THE ALIPHATIC DOUBLE BONDS ARE HYDROGENATED.
Abstract:
A process for hydroconversion or organic materials, particularly solid or very high boiling organic materials, by contacting such materials under hydrogen pressure and at elevated temperature with a continuous liquid phase catalyst containing gallium trichloride, gallium tribromide, gallium triiodide, mercuric bromide, mercuric iodide, stannic bromide, stannic iodide, stannous chloride, stannous bromide, stannous iodide, zirconium tetrachloride, zirconium tetrabromide, zirconium tetraiodide, titanium tetrabromide, titanium tetraiodide, titanium triiodide, cuprous chloride, cuprous bromide, cuprous iodide, hafnium tetrachloride, hafnium tetrabromide, or hafnium tetraiodide.