摘要:
A PROCESS FOR PRODUCING A SOLUBLE POLYIMIDE BY THE POLYCONDENSATION OF MELLOPHANIC AND PYROMELLITIC DIANHYDRIDE AND AN AROMATIC DIAMINE, FOLLOWED BY THE IMIDATION OF THE POLYCONDENSATION PRODUCT. A POLYIMIDE SOLUTION THUS PREPARED IS ALSO CLAIMED.
摘要:
TREATED WITH ORGANIC SULFUR COMPOUNDS, TO THEREBY IMPART THERMAL STABILITY TO THE OIL, THEN SUBJECTING THE RESULTING OIL TO A HYDROREFINING FOLLOWED BY REACTION WITH AN OLEFIN AND/OR A HYDROGENATION IS DISCLOSED.
A PROCESS FOR OBTAINING IMPROVED HYDROCARBON OIL PRODUCTS BY TREATING BY-PRODUCT HEAVY FRACTIONS, FORMED IN THE PRODUCTION OF OLEFINS AND HAVING INITIAL BOILING POINT OF ABOVE 160*C. AND A 75% DISTIL-OFF POINT OF BELOW 450*C., WITH HYDROGEN AT TEMPERATURE OF FROM 40 TO 200*C. AND A PRESSURE OF FROM 5 TO 300 KG./CM.2 G USING A NICKEL-CONTAINING CATALYST WHICH HAS BEEN PRE-
摘要:
A PROCESS FOR PRODUCING A POLYMER OF 4-AMINOMETHYLCYCLOHEXANE-1-CARBOXYLIC ACID, OR A COPOLYMER OF THE ACID WITH E-CAPROLACTAM INCLUDING CONDUCTING THE PLOLYMERIZATION IN THE PRESENCE OF FROM 20 TO 150% WATER, AND AT A TEMPERATURE OF FROM 180 TO 340*C.
摘要:
THIS INVENTION IS A PROCESS FOR PRODUCING 3-AZABICYCLO (3,2,2) NONANONE-2 BY REACTING NITROSYL SUFURIC ACID WITH BICYCLO (2,2,2) OCTANE-2 CARBOXYLIC ACID IN PRSENCE OF FUMING SULFURIC ACID, PROCESS FOR POLYMERIZING 3-AZABICYCLO (3,2,2) NONANONE-2 OR FOR COPOLYMERIZATION 3AZABICYCLO (3,2,2) NONANONE WITH E-CAPROLACTAM, AND POLYAMIDES AND COPOLYAMIDES OBTAINED THEREBY.
摘要:
THIS INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF HYDROGENATED ALKYL TARS COMPRISING THE STEPS OF DESULFURIZATION AND ALKYLATION WITH A LOWER OLEFIN IN THE PRESENCE OF A CATALYST, OF A TAR FRACTION OBTAINED BY THE THERMAL CRACKING OF PETROLEUM HYDROCARBON AT A TEMPERATURE BETWEEN 700*C. AND 2300*C., FOLLOWED BY HYDROGENATION OF THE RESULTING ALKYL TAR IN THE PRESENCE OF A SUITABLE HYDROGENATION CATALYST.
摘要:
An electric insulating oil having excellent electrical insulation properties is obtained by incorporating in silicone oil at least one member selected from the group consisting of alkyl fluoranthenes of the generic formula
AND ALKYL PYRENES OF THE GENERIC FORMULA
WHEREIN, R denotes an alkyl group having from one to four carbon atoms and x denotes an integer having a value of from 1 to 4, and when x is an integer of 2 or more, R may be the same or different.
摘要:
Polyolefin compositions having excellent dielectric properties comprising an alkylfluoranthene having the following formula (WHEREIN R represents an alkyl group containing from 1 to 4 carbon atoms, and x is an integer of from 1 to 4, and when x is an integer of 2 or greater, R may be different or the same) in an amount of at least 0.5 parts by weight per 100 parts by weight of a polyolefin.
摘要:
A PROCESS FOR THE PRODUCTION OF ALKYLATED TARS COMPRISING REACTING A LOWER OLEFIN, IN THE PRESENCE OF A SILICAALUMINA OF ZEOLITE TYPE CATALYST, WITH A TAR FRACTION OBTAINED BY THE THERMAL DECOMPOSITION OF A PETROLEUM HYDORCARBON AT 700-2300*C., AND IF DESIRED, FOLLOWING A DESULFURIZATION REACTION.
摘要:
Mellophanic dianhydride is prepared by the reaction of cyclohexane-1, 2, 3, 4-tetracarboxylic acid and bromine followed by the dehydration of the mellophanic acid thus prepared.