Abstract: The present invention relates to the use of phenylenediamines, preferably para-phenylenediamines, in combination with hindered phenols, to reduce polymer formation during the manufacture of acrylonitrile.

Abstract: The present invention relates to the use of phenylenediamines, preferably para-phenylenediamines, in combination with hindered phenols, to reduce polymer formation during the manufacture of acrylonitrile.

Abstract: The present invention relates to the use of phenylenediamines, preferably para-phenylenediamines, in combination with hindered phenols, to reduce polymer formation during the manufacture of acrylonitrile.

Abstract: Methods and compositions are provided for inhibiting the formation and deposition of pyrolytic coke on metal surfaces in contact with a hydrocarbon feedstock undergoing pyrolytic processing. Coke inhibition is achieved by adding a coke inhibiting amount of a combination of a boron compound and a dihydroxybenzene compound.

Abstract: The present invention pertains to methods and compositions for inhibiting polymerization of hydrocarbons during processing and storage. The methods comprise adding an effective amount of a hydroxyalkylhydroxylamine compound to the hydrocarbon sought to be treated.

Abstract: The present disclosure is directed to methods for controlling undesirable coke formation and deposition on structural surfaces which is commonly encountered during the high temperature processing of hydrocarbons. Coke formation can be inhibited by adding an effective amount of a dihydroxybenzene to the system suffering from coke formation.

Abstract: A method for inhibiting fouling during the elevated temperature processing of hydrocarbon comprising adding to the hydrocarbon a composition comprising a catechol having the structure: ##STR1## wherein R is H or C.sub.1 -C.sub.10 alkyl and, an organic acid.

Abstract: Methods and compositions are provided for inhibiting the polymerization of a vinyl monomer during elevated processing thereof or during storage or shipment of the monomer containing product. The compositions comprise a combination of a dihydroxybenzene compound and an organic amine compound.

Abstract: This invention relates to methods and compositions for color stabilized distillate fuel oils which comprise adding an effective stabilizing amount of a combination of (a) a boron hydride-amine compound and (b) an organic silicon compound.

Abstract: This invention relates to processes for inhibiting fouling in fluid catalytic cracking units. The processes comprise adding to the hydrocarbon being processed a polymer formation inhibiting amount of aminoethyl piperazine.

Abstract: The present invention is directed to an antioxidant material and its use in petroleum and petrochemical processes to reduce and/or control fouling problems specifically as regards hydrocarbons having a bromine number of 10 or less and containing oxygen. The inventive antioxidant material is 1-(2-aminoethyl) piperazine.

Abstract: Gum and sediment formation in liquid hydrocarbon mediums are inhibited by adding to the medium a branched or straight chain C.sub.1 -C.sub.8 aminoalcohol. The invention is particularly well-suited for use in hydrodesulfurizer processes wherein the hydrocarbon medium is typically a naphtha, diesel, kerosene, light gas and or residual fuel charge and the charge or medium is subjected to high temperature and pressure treatment in the presence of a catalyst. The invention also shows particular advantage in distillate fuels, such as in blended diesel fuels, both before and during heat treatment processing thereof.

Abstract: Methods and compositions are provided for inhibiting the formation and deposition of pyrolytic coke on metal surfaces in contact with a hydrocarbon feedstock undergoing pyrolytic processing. Coke inhibition is achieved by adding a coke inhibiting amount of a combination of a boron compound and a dihydroxybenzene compound.

Abstract: Methods and compositions are provided for inhibiting the formation of polymers in petroleum or petrochemical processes that subsequently foul heat transfer surfaces. The compositions comprise a combination of N-Phenyl-N'-(1,3-dimethylbutyl)-p-phenylenediamine (PDA) and an organic acid. The methods comprise adding from 1 to 2500 ppm PDA and 1 to 3500 ppm organic acid to the system experiencing the fouling problem.

Abstract: This invention relates to processes and compositions for stabilizing distillate fuel oil which comprises adding to the distillate fuel oil an effective stabilizing amount of a mixture of (a) a phosphite compound having the formula ##STR1## wherein R, R' and R" are the same or different and are alkyl, aryl, alkaryl or aralkyl groups, and (b) an effective carboxylic acid having from 2 to about 20 carbon atoms, wherein the weight ratio of (a):(b) is from about 1:5 to aboug 1000:1.

Abstract: The present disclosure is directed to a composition and methods for controlling undesirable coke formation and deposition commonly encountered during the high temperature processing of hydrocarbons. Coke formation can be inhibited by adding a sufficient amount of a combination of a boron compound and a dihydroxybenzene.

Abstract: The present disclosure is directed to a composition and methods for controlling undesirable coke formation and deposition commonly encountered during the high temperature processing of hydrocarbons. Coke formation can be inhibited by adding a sufficient amount of a combination of a boron compound and a dihydroxyphenol.

Abstract: Oxidative stability of gasoline mixtures is improved by adding to the gasoline an alkyl 1,2-dihydroquinoline compound, dimer, trimer or polymer thereof. Optionally, a hindered phenol may be conjointly used with the quinoline compound.

Abstract: Gum and sediment formation in liquid hydrocarbon mediums are inhibited by adding to the medium an alkyl 1,2-dihydroquinoline compound, dimer, trimer or polymer thereof. The invention is particularly well-suited for use in hydrodesulfurizer processes wherein the hydrocarbon medium is typically a naphtha, diesel, kerosene, light gas and or residual fuel charge and the charge or medium is subjected to high temperature and pressure treatment in the presence of a catalyst.

Abstract: An apparatus designed to house and secure a video cassette recorder wherein said apparatus can be accessed completely through only one major entrance which can be protected by operable doors, which can be secured by locking mechanisms and thereby prohibit any undesirable entry. The apparatus is used to house and secure any VCR such that once a video cassette recorder is placed inside said apparatus, the doors closed and locked, access to the video recorder becomes prohibited. The apparatus allows for normal usage of a VCR while at the same time prevents unwanted tampering to the video recorder.