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Showing papers on "Aromatic hydrocarbon published in 1970"


Patent
18 Sep 1970
TL;DR: In this article, a desorbent containing para-diethylbenzene was used to increase the selectivity of a crystalline aluminosilicate for a given feed aromatic and thereby allowing a more efficient separation with a higher purity extract stream recovered from the process.
Abstract: An improved adsorptive separation process for the separating of at least one C8 aromatic hydrocarbon from a hydrocarbon feed containing a mixture of C8 aromatic hydrocarbons which process employs a crystalline aluminosilicate adsorbent to selectively adsorb one C8 aromatic from the feed. The improvement basically comprises employing a desorbent containing para-diethylbenzene to increase the selectivity of crystalline aluminosilicate for a given feed aromatic and thereby allowing a more efficient separation with a higher purity extract stream recovered from the process.

140 citations


Patent
J Kirkland1, P Yates1
22 May 1970
TL;DR: In this paper, a process for making a chromatographic packing having a polymeric stationary phase is described, in which molecules having the formula where R3'' is a hydroxyl, or an aliphatic or aromatic hydrocarbon monovalent radical, and R4 is a monovalents aliphatically or aromatic radical, are partially prepolymerized, chemically bonded to a polyvalent metal-containing substrate, the metal having a valence of 3-5, and further polymerized.
Abstract: A process for making a chromatographic packing having a polymeric stationary phase in which molecules having the formula WHEREIN R3'' is a hydroxyl, or an aliphatic or aromatic hydrocarbon monovalent radical, and R4 is a monovalent aliphatic or aromatic hydrocarbon radical, are partially prepolymerized, chemically bonded to a polyvalent metal-containing substrate, the metal having a valence of 3-5, and futher polymerized. The polymeric stationary phase has a repeating unit of the formula WHEREIN A is -O- or a monovalent aliphatic or aromatic hydrocarbon radical, and is chemically bonded to the surface of the substrate by an LINKAGE, WHERE SILICON IS PART OF A REPEATING UNIT.

81 citations


Patent
09 Jun 1970
TL;DR: In this paper, the specification discloses that certain polychlorinated or polybrominated aromatic hydrocarbons compounds can be incorporated in thermosetting polymer compositions to make the thermometresetting compositions flame retardant without injuring the desirable physical and electrical properties of the thermoset compositions.
Abstract: This specification discloses that certain polychlorinated or polybrominated aromatic hydrocarbon compounds can be incorporated in thermosetting polymer compositions to make the thermosetting compositions flame retardant without injuring the desirable physical and electrical properties of the thermosetting compositions when in the thermoset state These polyhalogenated aromatic hydrocarbons are apparently caused to react into the thermosetting composition, provided there is a minimum of 1 mol of a polyunsaturated monomer containing carbon to carbon unsaturation for each 3 mols of polychlorinated aromatic hydrocarbons The thermosetting compositions generally contain a polyunsaturated monomer, a polyunsaturated polymer with carbon to carbon double bond unsaturation or a polyphenylene ether polymer which may be used in place of some or all of the polyunsaturated polymer, and a polyhalogenated aromatic hydrocarbon, containing at least 50% by weight combined chlorine or bromine and whose molecular weight is greater than 200 These thermosetting compositions can be heat cured or thermoset by a free radical initiator at a temperature of at least 130°C, and can contain pigments, reinforcing fibers, release agents, coupling agents, and other incidental amounts of additives commonly used in thermosetting resin compositions

67 citations


Journal ArticleDOI
TL;DR: The first example of such an amine elimination reaction involving an aromatic hydrocarbon was reported in this paper, where Me3SnNMe2 reacts with pentafluorobenzene in refluxing benzene to give trimethylamido trimethyltin.

57 citations


Journal ArticleDOI
TL;DR: In this paper, several strains were found to produce a large amount of cumic acid from p-cymene, including S449B1, B2, B3, B4 and B6.
Abstract: During the course of an investigation of the microbial assimilation of aromatic hydrocarbons, several strains were found to produce a large amount of cumic acid from p-cymene.Five strains, S449B1, B2, B3, B4 and B6, were isolated from soil with the aromatic hydrocarbon substrates. They all assimilated both p-cymene and cumene. The strain S449B3 grew also on p-xylene, and S449B6 on p-xylene, toluene, and ethylbenzene.They were all shown to be capable of producing an ultraviolet-absorbing substance from p-cymene. This substance was isolated in crystalline form and identified as cumic acid by infrared absorption spectrum and other observations.The superior strain, S449B6, produced the acid as much as 1000 mg/1 in shaking culture at 30°C after 24 hours. The yields were increased up to approximately 1700 mg/1 after further investigations. Addition of calcium carbonate and considerable agitation were favorable conditions for the acid production.The taxonomical studies of these strains were carried out, and they...

30 citations


Journal ArticleDOI
TL;DR: In this paper, potential-step methods are used to study the source of electrons transferred to radicals formed by protonation of the hydrocarbon radical anions (e.g., anthracene and naphthalene).
Abstract: Homogeneous electron exchange rates, determined by a modified e.s.r. method in both the slow and fast exchange limits, are compared with published heterogeneous rates at mercury for aromatic hydrocarbon reduction in dimethylformamide; the ratio is approximately constant. This constant can be derived from theories of Marcus and Hush on a model in which image forces are negligible in the electrode process and homogeneous exchange occurs only on contact. Potential-step methods are used to study the source of electrons transferred to radicals formed by protonation of the hydrocarbon radical anions (e.c.e. mechanism) : electron transfer occurs from other radical anions for anthracene and from the electrode for naphthalene. This result is interpreted in terms of relative rates of cross-exchange reactions as predicted by Marcus theory from the “isotopic” exchange rates and redox potentials of the systems. General considerations imply that cross-exchange reactions will predominate in many aromatic systems. Proton addition from phenol to the radical anions appears to involve direct contact of acid and base rather than the free (solvated) proton.

22 citations


Journal ArticleDOI
TL;DR: In this paper, the acetolyses of hexaaryldileads (XC6H4)6Pb2 were examined at 40° in 1 3 acetic acid/dioxane solution.

17 citations


Patent
02 Feb 1970
TL;DR: HALOGENATED PHOSPHATE POLYESTERS, useful as FLAME RETARDANTS for POLYURETHANE FOAM, are described in this paper.
Abstract: HALOGENATED PHOSPHATE POLYESTERS, USEFUL AS FLAME RETARDANTS FOR POLYURETHANE FOAM, ARE DISCLOSED WHICH HAVE THE FORMULA R-(X)A-(O-P(=O)(-O-R'')2)N WHEREIN R IS AN ALIPHATIC HYDROCARBON RADICAL OF 1-8 CARBONS OR AN AROMATIC HYDROCARBON RADICAL, X IS A HALOGEN, A IS AN INTEGER OF 0-4 N IS AN INTEGER OF 2-6, AND EACH R'' IS INDEPENDENTLY A HALOALKYL RADICAL. ACCORDING TO PREFERRED EMBODIMENTS OF THE INVENTION, THESE POLYESTERS ARE REPRESENTED BY THE FORMULA (R''-O-)2-P(=O)-O-R-O-P(=O)(-O-R'')2 WHEREIN R AND R'' ARE AS INDICATED ABOVE.

16 citations


Journal ArticleDOI
TL;DR: In this paper, the quenching of excited singlet (1 M 1 * ) and triplet (3 M 1* ) states of an aromatic hydrocarbon by 3 O 2 and 2 NO is discussed in terms of the formation of exchange complexes.

12 citations


Journal ArticleDOI
TL;DR: In this article, the preparation and properties of some members of a new group of heterocycles derived from acenaphthylene (ACENaphtho[5,6-de]triazines etc.) are described.
Abstract: The preparation and properties of some members of a new group of heterocycles derived from acenaphthylene (acenaphtho[5,6-de]triazines etc.) are described. Their electronic structure is compared with that of the non-benzenoid aromatic hydrocarbon cyclohept[fg]acenaphthylene (acepleiadylene). An attempt to generate 5,6-dehydroacenaphthylene is recorded.

11 citations


Patent
24 Feb 1970
TL;DR: In this article, the transalkylation of aromatic hydrocarbons of nine carbon atoms was studied in the presence of hydrogen gas with a catalyst selected from the group consisting of: DEALKALIZED MORDENITES, ALUMINUM FLUORIDE and at least one METAL selected from Group Ib or VIa of Mendelejeff's Periodic Table.
Abstract: A process for the transalkylation of aromatic hydrocarbons of nine carbon atoms which comprises heat contacting the starting feed containing at least one aromatic hydrocarbon of nine carbon atoms as a main component in the presence of hydrogen gas with a catalyst selected from the group consisting of: A. DEALKALIZED MORDENITES, B. COMPOSITIONS COMPOSED OF A DEALKALIZED MORDENITE AND AT LEAST ONE METAL SELECTED FROM METALS OF Group Ib or VIa of the Periodic Table, and C. COMPOSITIONS COMPOSED OF A DEALKALIZED MORDENITE, AN ALUMINUM FLUORIDE AND AT LEAST ONE METAL SELECTED FROM METALS OF Group Ib or VIa of Mendelejeff''s Periodic Table.


Patent
Donald G Stenmark1
12 Nov 1970
TL;DR: In this article, the authors describe the production of a SELECTED AROMATIC HYDROCARBON, which is a hybrid of a monocyclic AROATIC and a cycled UNISOMERIZED hybrid.
Abstract: IN THE LIQUID PHASE ISOMERIZATION OF A SELECTED MONOCYCLIC AROATIC HYDROCARBON, SUCH AS A XYLENE TO P-XYLENE, THE PRODUCTION OF THE SELECTED AROMATIC HYDROCARBON IS ENHANCED AND THE AMOUNT OF RECYCLED UNISOMERIZED HYDROCARBON IS REDUCED BY TRANSALKYLATION OF THE ISOMERIZATE PRIOR TO RECYCLE OF THE TRANSALKYLATE AND SEPARATION OF IT INTO ITS COMPONENT FRACTIONS.

Patent
08 Dec 1970
TL;DR: In this article, a process for alkylating an aromatic hydrocarbon wherein said hydrocarbon is reacted with a member of the group consisting of the olefines and the alkyls halides in the presence of a Lewis acid of the formula R M Xn 1, in which R is a monovalent organic radical having one - 20 carbon atoms, selected from the group of the alyl, cycloalkyl, aryl, aralkyl and alkoxy groups, X is a halogen atom or an electronegative group,
Abstract: Process for alkylating an aromatic hydrocarbon wherein said hydrocarbon is reacted with a member of the group consisting of the olefines and the alkyl halides in the presence of a Lewis acid of the formula R M Xn 1, in which R is a monovalent organic radical having one - 20 carbon atoms, selected from the group consisting of the alkyl, cycloalkyl, aryl, aralkyl and alkoxy groups, X is a halogen atom or an electronegative group, M is a metal from groups IIIb, IVb and Vb of the periodic classification of the elements and n is the highest valence of the metal, said process comprising using water in a molar proportion of from 0.01 to 5 times that of the Lewis acid.

Patent
28 Jan 1970
TL;DR: In this article, organics are reduced to ALDEHYDES by using SODIUM ALUMINUM HYDRIDES of the formulae NAA1HX (or 1)4-X at a low temperature, in an ETHER OR AROMATIC HYDROCARBON.
Abstract: ORGANIC ESTERS ARE REDUCED TO ALDEHYDES BY USING SODIUM ALUMINUM HYDRIDES OF THE FORMULA NAA1HX(OR1)4-X AT A LOW TEMPERATURE, PREFERABLY IN AN ETHER OR AROMATIC HYDROCARBON, R1 IS ETHER LOWER ALKOXY LOWER ALKYL, LOWER DIALKYLAMINO LOWER ALKYL, TETRAHYDROFURFURYL OR PYRANYLMETHYL. THE REACTION IS CARRIED OUT BELOW 0* C. PREFERABLY -40 TO -70* C.

Patent
03 Apr 1970
TL;DR: In this article, a mixture of a preheated mixture and a steamed mixture was used to simulate an ALKYLATED AROMATIC HYDROCARBON.
Abstract: METHOD OF CATALYTICALLY DEHYDROGENATING AN ALKYLATED AROMATIC HYDROCARBON HAVING AT LEAST TWO CARBON ATOMS IN A SIDE-CHAIN TO A VINYLAROMATIC HYDROCARBON BY RAPIDLY PASSING THROUGH A CATALYST ZONE A FEEDSTOCK WHICH HAS BEEN HEATED TO THE REACTION TEMPERATURE AND HAS BEEN OBTAINED BY MIXING A PREHEATED MIXTURE CONTAINING THE ALKYLATED AROMATIC HYDROCARBON AND OPTIONALLY STEAM AND OPTIONALLY THE VINYLAROMATIC HYDROCARBON WITH STEAM HEATED TO A TEMPERATURE ABOVE THE TEMPERATURE OF REACTION. THE PREHEATED MIXTURE HAS A TEMPERATURE OF FROM 400* TO 620* C. AND THE STEAM HEATED TO ABOVE THE REACTION TEMPERATURE HAS A TEMPERATURE OF FROM 820* TO 1,100* C. AND THE RESULTING FEEDSTOCK HAS A BLEND TEMPERATURE OF FROM 550* TO 700* C., THE TIME TAKEN FOR MIXING THE PREHEATED MIXTURE WITH THE HEATED STEAM BEING LESS THAN 0.1 SECOND WHILE THE RESIDENCE TIME OF THE RESULTING FEEDSTOCK BETWEEN THE MIXING POINT AND THE POINT OF ENTRY INTO THE CATALYST ZONE IS LESS THAN 0.2 SECOND. THE PRODUCTS ARE IMPORTANT MONOMERS AND COMONOMERS.

Patent
13 May 1970
TL;DR: In this article, a quinone is prepared by the oxidation of an aromatic hydrocarbon by contacting with an aqueous solution of a ceric compound in an electrolytic cell.
Abstract: 1,192,037. Preparation of quinones. IMPERIAL CHEMICAL INDUSTRIES Ltd. 9 Oct., 1968 [23 Oct., 1967], No. 48092/67. Heading C2C. Quinones are prepared by the oxidation of an aromatic hydrocarbon by contacting with an aqueous solution of a ceric compound. The cerous compound formed in the reaction is preferably oxidized back to ceric compound in an electrolytic cell. The aromatic hydrocarbon is preferably naphthalene, phenanthrene, anthracene, diphenyl or pyrene.

Patent
20 Apr 1970
TL;DR: GEM-DIARYLALKANES as mentioned in this paper react to an ARYLALKANE with an ALKYL-free AROMATIC HYDROCARBON in the presence of a CATALYST COMPRISING a FREIDEL-CRAFTS METAL HALIDE and a HIGHER VALence HALIDE of a METAL.
Abstract: GEM-DIARYLALKANES ARE PREPARED BY REACTING AN ARYLALKANE WITH AN ALKYL-FREE AROMATIC HYDROCARBON IN THE PRESENCE OF A CATALYST COMPRISING A FREIDEL-CRAFTS METAL HALIDE AND A HIGHER VALENCE HALIDE OF A METAL WHICH POSSESSES AT LEAST TWO VALENCES.

Patent
13 Jul 1970
TL;DR: In this article, the (CH3-O-)2-C(-R1)-R2 wherein R1 may be hydrogen and R2 may be HYDROGEN OR a METHYL RADICAL, and wherein r1 and r2 might be TAKEN TOGETHER and represented OXYGEN, the COMPOSITION is stable in COMBINATION with an AROMATIC HYDROCARBON SUCH AS TOLUENE, XYLENE, or NAPHTHALENES, when USED in
Abstract: METHYLENE CHLORIDE CONTAINING FROM 0.03 TO 10.0 WEIGHT PERCENT OF A COMPOUND HAVING THE FORMULA: (CH3-O-)2-C(-R1)-R2 WHEREIN R1 MAY BE HYDROGEN AND R2 MAY BE HYDROGEN OR A METHYL RADICAL, AND WHEREIN R1 AND R2 MAY BE TAKEN TOGETHER AND REPRESENT OXYGEN, THE COMPOSITION IS STABLE IN COMBINATION WITH AN AROMATIC HYDROCARBON SUCH AS TOLUENE, XYLENE OR NAPHTHALENES, WHEN USED IN COMBINATION WITH ALUMINUM TO PREPARE PAINTS AND LACQUERS.

Journal ArticleDOI
TL;DR: In this article, it was shown using simple perturbation theory that the intermolecular π-electron interaction leads to stabilisation of aromatic hydrocarbon dimers of certain tilted configuration with respect to two infinitely isolated monomers.

Patent
27 Mar 1970
TL;DR: Aromatic hydrocarbon compounds are selectively reduced electrochemically to their 1,4-dihydro derivatives in an ammoniated solvent-electrolyte system under conditions selected to effect oxidation of ammonia and improved long-term current efficiency as discussed by the authors.
Abstract: Aromatic hydrocarbon compounds are selectively reduced electrochemically to their 1,4-dihydro derivatives in an ammoniated solvent-electrolyte system under conditions selected to effect oxidation of ammonia and improved long-term current efficiency.

Patent
16 Sep 1970
TL;DR: In the process for providing an organic isocyanate by the reaction of an organic nitro compound with carbon monoxide in the presence of a noble metal-based catalyst, the improvement which comprises performing the reaction in the case of an unsaturated organic compound having at least one multiple bond conjugated to another multiple bond in selected aliphatic or cyclo-aliphatic systems or in the absence of a multiple bond to an aromatic hydrocarbon nucleus is described in this paper.
Abstract: In the process for providing an organic isocyanate by the reaction of an organic nitro compound with carbon monoxide in the presence of a noble metal based catalyst, the improvement which comprises performing the reaction in the presence of an unsaturated organic compound having at least one multiple bond conjugated to another multiple bond in selected aliphatic or cycloaliphatic systems or in the presence of an unsaturated organic compound having at least one multiple bond conjugated to an aromatic hydrocarbon nucleus.


Patent
Bills James L1
10 Feb 1970
TL;DR: In this paper, a CUPROUS SULFONATE SALT COMPLEX has been used for removing CARBON MONOXIDE IMPURITIES from Gaseous StREAMs.
Abstract: CUPROUS SULFONATE SALT COMPLEXES COMPRISE: (A) A CUPROUS SULFONATE SALT HAVING THE FORMULA RSO3CU WHEREIN R IS AN ORGANIC RADICAL CONTAINING 1 TO 20 CARBON ATOMS AND HAVING SUBSTITUENTS WHICH ARE HYDROGEN, CHLORINE, FLUORINE AND COMBINATIONS THERREOF; AND (B) AN ORGANIC COMPLEXING AGENT WHICH IS AN AROMATIC HYDROCARBON, AN OLEFIN HYDROCARBON, A NITRILE, A NITRO-ALKYL, A NITRO-ARYL, A SULFONE OR COMBINATION THEREOF. THESE CUPOROUS SULFONATE SALT COMPLEXES HAVE SURFACE ACTIVE PROPERTIES RENDERING THEM USEFUL AS SURFACE TENSION REDUCING AGENTS, WETTING AGENTS, DISPERSING AGENTS AND EMULSIFYING AGENTS. THESE COUPROUS SALT COMPLEXES ARE ALSO USEFUL FOR REMOVING CARBON MONOXIDE IMPURITIES FROM GASEOUS STREAMS.

Patent
05 Oct 1970
TL;DR: In this paper, a method of preparing hydrocarbon solvent solutions of organolithium compounds is presented, in which solutions such as benzene or heptane solutions of di-and poly-lithio adducts of polyisoprenes or polybutadienes containing strongly solvating ethers such as dimethyl ether or tetrahydrofuran are treated with weakly solving anisole, or weakly Solvating tertiary amines such as triethylamine, to effect displacement from said solutions of the dimethyl or tetrahed
Abstract: Method of preparing hydrocarbon solvent solutions of organolithium compounds in which solutions such as benzene or heptane solutions of di- and poly-lithio adducts of polyisoprenes or polybutadienes containing strongly solvating ethers such as dimethyl ether or tetrahydrofuran are treated with weakly solvating ethers such as anisole, or weakly solvating tertiary amines such as triethylamine, to effect displacement from said solutions of the dimethyl ether or tetrahydrofuran. The resulting solutions are useful as catalysts in the production of conjugated polyene hydrocarbon polymers or copolymers thereof with vinyl-substituted aromatic hydrocarbons, having high cis-1,4 contents, as well as vinyl-substituted aromatic hydrocarbon polymers.

Patent
16 Dec 1970
TL;DR: In this paper, a method of the production of DIHYDRO-AROMATIC HYDROCARBON is discussed, in which a CATHOLYTE COMPosed of a HETEROGENEOUS MIXTURE of an AROMATICA HYDRO and an EQUEOUS SOLUTION of one or more quaternary AMMONIUM SALTS to ELECTROLYSIS CARRIED out at a TEMPERATURE from 30* to 100*C.
Abstract: THIS INVENTION RELATES TO A METHOD OF THE PRODUCTION OF DIHYDROAROMATIC HYDROCARBONS WHICH COMPRISES SUBJECTING A CATHOLYTE COMPOSED OF A HETEROGENEOUS MIXTURE OF AN AROMATIC HYDROCARBON AND AN EQUEOUS SOLUTION OF ONE OR MORE QUATERNARY AMMONIUM SALTS TO ELECTROLYSIS CARRIED OUT AT A TEMPERATURE FROM 30* TO 100*C. AND SUBSEQUENTLY RECOVERING THE RESULTING DIHYDRO AROMATIC HYDROCARBON.

Patent
02 Nov 1970
TL;DR: In this article, a stable solution of basic leads SUITABLE for use as PAINT DRIERS is provided by using a solvent for the SOAPS WHICH COMPRISES an ETHER HAVING SATURATED ALIPHATIC AND/or AROMATIC HYDROCARBON GROUPS.
Abstract: STABLE SOLUTION OF BASIC LEAD SOAPS SUITABLE FOR USE AS PAINT DRIERS ARE OBTAINED BY USING A SOLVENT FOR THE SOAPS WHICH COMPRISES AN ETHER HAVING SATURATED ALIPHATIC AND/ OR AROMATIC HYDROCARBON GROUPS. THE MONOHYDROROXYULATED POLYETHERS ARE PREFERRED.

Journal ArticleDOI
TL;DR: In this paper, the authors discussed the little model for a macromolecular high temperature superconductor in terms of its component parts, and showed that polymeric metallocenes, in which planar aromatic hydrocarbon rings and meatal atmos alternate, may be suitable.
Abstract: The “Little” model for a macromolecular high temperature superconductor can be discussed in terms of its component parts. Studies on molecules designed to serve as the polyene and the polyene spine indicate that polymeric metallocenes, in which planar aromatic hydrocarbon rings and meatal atmos alternate, may be suitable. Toward this end the hydrocarbon dicyclopentanaphthalene, and various substituted derivatives were synthesized, and the polymerization of the corresponding dianions with ferrous chloride were investigated.

Patent
E Wilkus1, A Berger1
20 Jul 1970
TL;DR: One class of organosilicon materials are provided having chemically combined UNITS, where R'''' is a divalent hydrocarbon radical and 2 is a radical selected from aryloxyaryl, arylythioaryl and arylsulfonylaryl, and certain heteroaromatic radicals.
Abstract: One class of organosilicon materials are provided having chemically combined UNITS, WHERE R'''' is a divalent hydrocarbon radical and 2 is a radical selected from aryloxyaryl, arylthioaryl, arylsulfonylaryl, and certain heteroaromatic radicals. In addition, organosilicon polymers and copolymers are provided having chemically combined UNITS, WHERE 2'' IS A RADICAL SELECTED FROM 2 RADICALS, MONOVALENT AROMATIC HYDROCARBON RADICALS AND HALOGENATED MONOVALENT AROMATIC HYDROCARBON RADICALS. The monomers and polymers can be employed as perfume oil bases, in cosmetics and as fluids in the manufacture of elastomers and resins.

Patent
Emmett H. Burk1, Donald D Carlos1
06 May 1970
TL;DR: In this paper, wherein r is an aromatic hydrocarbon radical of 1 to 3 aromatic rings which can be substituted with halogen, nitro, or alkoxy, e.g., methoxy, groups.
Abstract: Compounds of the formula WHEREIN R is an aromatic hydrocarbon radical of 1 to 3 aromatic rings which can be substituted with, for instance, halogen, nitro, or alkoxy, e.g., methoxy, groups. The compounds can be made by reacting the corresponding hydroxamic acids and thionyl chloride. The compounds are useful as, inter alia, isocyanate generators and have the advantage over conventional aromatic isocyanates in that they can be easily handled and stored.