Showing papers on "Aromatic hydrocarbon published in 1979"

Impregnated polymerization catalyst, process for preparing and use for ethylene copolymerization

Abstract: A catalyst formed from selected organo aluminum compounds and a precursor composition of the formula Mg.sub.m Ti.sub.l (OR).sub.n X.sub.p [ED].sub.q wherein ED is a selected electron donor compound m is ≧0.5 to ≦56 n is 0, 1 or 2 p is ≦2 to ≧116 q is ≧2 to ≦85 R is a C 1 to C 14 aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C 1 to C 14 aliphatic or aromatic hydrocarbon radical, and X is selected from the group consisting of Cl, Br, I or mixtures thereof, which catalyst is in particulate form and impregnated in a porous inert carrier material. A process for preparing such catalyst. A process for using said catalyst to readily prepare ethylene copolymers having a density of about ≧0.91 to ≦0.94 and a melt flow ratio of ≧22 to ≦32 in a low pressure gas phase process at a productivity of ≧50,000 pounds of polymer per pound of Ti. Novel polymers and molded articles are prepared.

Preparation of ethylene copolymers in fluid bed reactor

Abstract: Ethylene copolymers having a density of ≧0.91 to ≦0.96 and a melt flow ratio of ≧22 to ≦32 are readily produced in a low pressure gas phase process at a productivity of ≧50,000 pounds of polymer per pound of Ti with a particulate catalyst diluted with an inert carrier material and formed from selected organo aluminum compounds and a precursor composition of the formula: Mg.sub.m Ti.sub.1 (OR).sub.n X.sub.p [ED].sub.q wherein ED is a selected electron donor compound. m is ≧0.5 to ≦56 n is 0 or 1 p is ≧6 to ≦116 q is ≧2 to ≦85 R is a C 1 to C 14 aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C 1 to C 14 aliphatic or aromatic hydrocarbon radical, and X is selected from the group consisting of Cl, Br, I, or mixtures thereof.

Emulsifier of Arthrobacter RAG-1: specificity of hydrocarbon substrate.

Abstract: The purified extracellular emulsifying factor produced by Arthrobacter RAG-1 (EF-RAG) emulsified light petroleum oil, diesel oil, and a variety of crude oils and gas oils. Although kerosine and gasoline were emulsified poorly by EF-RAG, they were converted into good substrates for emulsification by addition of aromatic compounds, such as 2-methylnaphthalene. Neither aromatic nor aliphatic fractions of crude oil were emulsified by EF-RAG; however, mixtures containing both fractions were emulsified. Pure aliphatic or aromatic hydrocarbons were emulsified poorly by EF-RAG. Binary mixtures containing an aliphatic and an aromatic hydrocarbon, however, were excellent substrates for EF-RAG-induced emulsification. Of a variety of alkylcyclohexane and alkylbenzene derivatives tested, only hexyl- or heptylbenzene and octyl- or decylcyclohexane were effectively emulsified by EF-RAG. These data indicate that for EF-RAG to induce emulsification of hydrocarbons in water, the hydrocarbon substrate must contain both aliphatic and cyclic components. With binary mixtures of methylnaphthalene and hexadecane, maximum emulsion was obtained with 25% hexadecane.

Process for the preparation of high density ethylene polymers in fluid bed reactor

Abstract: A catalytic process for preparing ethylene polymers having a density of ≧9.94 to ≦0.97 and a melt flow ratio of about ≧22 to ≦32 in a low pressure gas phase process at a productivity of ≧50,000 pounds of polymer per pound of Ti with a cytalyst formed from selected organoaluminum compounds, as activator and a precursor composition of the formula wherein ED is a selected electron donor compound m is≧0.5 to ≦56 n is 0, 1 or 2 p is ≧2 to ≦116 q is>1.5m+2 R is a C1 to C14 aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C, to C14 aliphatic or aromatic hydrocarbon radical, and X is selected from the group consisting of Cl, Br, I or mixtures thereof, which catalyst is in particulate form and impregnated in a porous inert carrier material. The precursor is partially activated prior to the introduction thereof to the polymerization reactor.

Flameeretardant polyamide resin composition

Abstract: PURPOSE:To obtain a flame-retardant polyamide resin composition having good molding properties, free from corrosive gases emission in injection molding or in combustion and mold staining, by blending polyamide resin with a polymer having urea bonds in a main chain as a flame-retardant. CONSTITUTION:100 parts by wt. of polyamide resin is blended with preferably 5-30 parts by wt. of a high polymer having urea bonds in a main chain by melt blending. A polyureylene shown by the formula I: (R is 1-20C bifunctional aliphatic, aromatic, or alicyclic hydrocarbon residue; n is a positive integral number), a polyacylsemicarbazide shown by the formula II: (R' is 1-20C aliphatic or aromatic hydrocarbon residue), a polysemicarbazide shown by the formula III: (R'' is R' or carbonyl; R1 and R2 are H, or 1-10C aliphatic, aromatic hydrocarbon residue), and a polyurea shown by the formula IV may be cited as the high polymer.

Alkylation of aromatic hydrocarbons in the presence of coated zeolite catalysts

Abstract: Aromatic hydrocarbons, e.g., benzene and analogs thereof, are converted by alkylation to the corresponding alkyl aromatics by contacting the mononuclear aromatic hydrocarbon with an alkylating agent in the presence of a coated zeolite catalyst. This coated catalyst consists of an essentially inert base support having a strongly adherent outer coating containing an active catalytic zeolite material.

Excess volumes of mixing of aniline + aromatic hydrocarbons

Abstract: The excess volumes of mixing, VE, of aniline with benzene, toluene, o-xylene, m-xylene and p-xylene have been measured at temperatures 293.15, 298.15, 303.15 and 308.15 K over the whole composition range. The results indicate very weak electron donor–acceptor type interactions in these binary liquid mixtures. The shape and size of the aromatic hydrocarbon are responsible for stretching or breaking of hydrogen bonding in aniline.

Aromatic hydrocarbon resins

Abstract: A method of producing a condensation product by reacting together an aromatic hydrocarbon with a carbonyl compound having more than one carbon atom (therefore excluding formaldehyde) in the presence of aluminium chloride or bromide, at a temperature of from 5° to 90° C. The aluminium chloride or bromide should be substantially anhydrous. The aromatic hydrocarbon should be mono- or bi-nuclear and may be alkylated. The carbonyl compound may be an aldehyde or a betone and may be albyl or aryl.

Process for the production of alkylbenzenes

Abstract: This invention relates to a process for the production of alkylbenzenes, which comprises reacting benzene with at least one aromatic hydrocarbon substituted by alkyl groups and containing 9 or more carbon atoms, in the presence of an acid leached hydrogen form mordenite catalyst having a silica (SiO 2 )/alumina (Al 2 O 3 ) molar ratio of 15 to 21 and a sodium content of 0.05 weight % or less as Na 2 O.

Adsorbent for artificial organs

Abstract: An absorbant for use in artificial organs which is obtained by mixing and dissolving pitch with an aromatic compound and a polymer or copolymer of a chain hydrocarbon, dispersing the resultant mixture in water giving rise to beads and subjecting these beads to a series of treatments of removing of the aromatic hydrocarbon, infusibilizing, carbonizing and activating.

Olefin polymerisation catalyst support - obtd. from a di:alkyl magnesium, alkyl aluminium halide, electron donor and hydrocarbon solvent

Abstract: A catalyst support is prepd. under an inert atmosphere by (1) dissolving R2Mg, where R is 2-20C alkyl, in a hydrocarbon solvent and opt. an electron donor; (2) dissolving Rn' ALX3-n, where R' is 1-20C alkyl, X is CL or Br and n is 1 or 2, in a hydrocarbon solvent and opt. an electron donor; (3) contacting the solns. of (1) and (2) at -65 to 30 degrees C for 0.5-5 hrs.; (4) isolating the obtd. suspended Mg halide particles of size 0.05-80 microns; (5) washing the particles with a hydrocarbon solvent until free of halide and residual AL cpds., and (6) contacting them with an electron donor before and/or after the washing. Step (6) can be omitted when an electron donor is used in (1) or (2). The solvent is a 5-12C aliphatic, 5-12C monocyclic cycloaliphatic or 6-12C monocyclic aromatic hydrocarbon. The electron donor is a 4-24C aliphatic, 3.4C cyclic, or 7-15C aromatic ether, fatty acid 4-24C alkyl ester, aromatic acid 8-24C alkyl ester, 1-12 Caliphatic, 4-6C cyclic or 6-10C aromatic amine, 1-18C aliphatic or 7-15C aromatic alcohol, 6-10C phenol, 6-18C aliphatic or aromatic phosphine or 6-12C aliphatic sulphide. A Ti halide may be deposited on the support and the catalyst used for the polymerisation of 1-olefins, e.g. propylene, giving high rates and mileages and good stereospecificity.

Process for the preparation of an aromatic hydrocarbon mixture

Abstract: A B S T R A C T Process for the preparation of aromatic gasoline from natural gas. Natural gas is converted into synthesis gas. The synthesis gas is converted into an aromatic hydrocarbon mixture over a catalyst containing a crystalline iron silicate. From the aromatic hydrocarbon mixture a C2?fraction, an isobutane fraction and an aromatic liquid gasoline fraction are separated. The C2?fraction is converted into synthesis gas. The isobutane fraction is converted by alkylation into a product from which a gasoline fraction is separated. The two gasoline fractions are mixed.

Selective hydrogenation of polymer

Abstract: PURPOSE: The selective hydrogenation of a specific copolymer from a conjugate diene and a vinyl-substituted aromatic hydrocarbon is conducted in the pressure of a catalyst of metallic rhodium on a carrier to produce the titled polymer used as a rubber with high heat stability, high wethering resistance and ozone resistance. CONSTITUTION: After the polymerization of (A) a vinyl-substituted aromatic hydrocarbon such as styrene in a solvent such as cyclohexane in the presence of a catalyst such as n-butyl lithium, (B) a conjugate diene such as butadiene is added thereto and polymerization is effected to produce a block copolymer where a+b exceeds 30wt% of the total weight of the polymer, where a is defined as the block polymer content in the component A and b as the vinyl bond content in the component B. Then, the selective hydrogenation of the part of the component B is effected in the presence of a catalyst of metallic rhodium on a carrier such as carbon at a temperature lower than 120°C to produce the objective polymer. COPYRIGHT: (C)1981,JPO&Japio

Hydrocarbon soluble magnesium compositions of high magnesium content

Abstract: A composition of matter comprising di-n-butylmagnesium and dimethylmagnesium, to the exclusion of dialkylmagnesium compounds containing alkyl groups other than n-butyl or methyl, with an n-butyl:methyl alkyl group ratio of about 0.2:1 to about 5:1 which is soluble in aliphatic, cycloaliphatic, and aromatic hydrocarbon solvents is disclosed. The composition is prepared in the substantial absence of oxygen and moisture by the simultaneous or consecutive reactions of methyl and n-butyl halides with metallic magnesium in the presence of the hydrocarbon solvent, followed by separation of the insoluble magnesium chloride and any unreacted magnesium metal from the resulting solution.

Removal of organic chlorides from synthetic oils

Abstract: In producing synthetic hydrocarbon oils by polymerization of olefins using aluminum halide as the catalyst, organic halides are produced. These are corrosive to metal equipment and are poisonous to certain hydrogenation catalysts. This invention is concerned with reacting such organic halides with an aromatic hydrocarbon in a system also containing the polyolefins thus forming an alkylation product with both reactants prior to removal of the aluminum chloride catalyst.

Photoinitiation. IV. The effect of lewis acid on the vinyl monomer polymerization photoinitiated by aromatic hydrocarbons

Abstract: Polymerization of acrylonitrile photoinitiated by naphthalene, anthracene, phenanthrene, and pyrene is accelerated by an admixture of zinc (II) chloride, acetate, or nitrate. The effect of zinc (II) salts on the rate of pyrene-photoinitiated polymerization of acrylonitrile leads to an increase in this rate in the order Zn/OCOCH3/2 < ZnCl2 < Zn/NO3/2. The maximum polymerization rate is achieved at the molar ratio [ZnCl2]/([ZnCl2] + [pyrene]) approximately 0.7. In contrast to the photoinitiated polymerization of acrylonitrile, the methyl methacrylate admixture of zinc (II) chloride exerts a smaller effect on the polymerization rate. In the pyrene-photoinitiated polymerization of styrene an admixture of zinc (II) chloride retards the polymerization rate. Fluorescence of aromatic hydrocarbon in the system acrylonitrile–aromatic hydrocarbon is efficiently quenched by zinc (II) chloride. Stern–Volmer constants determined for pyrene (80 dm3 mole−1), phenanthrene (66 dm3 mole−1), and naphthalene (49 dm3 mole−1) are higher by about 2–3 orders of the Stern–Volmer constants for fluorescence quenching of aromatic hydrocarbons by acrylonitrile in the absence of ZnCl2. The fluorescence of anthracene in acrylonitrile is not quenched by ZnCl2. The acceleration effect of Zn (II) salts on the polymerization of acrylonitrile photoinitiated by aromatic hydrocarbons depends on two factors: an increase in the ratio of the rate constant of the growth and termination reactions, kp/kt, and an increase in the quenching constant of fluorescence of aromatic hydrocarbon, kq, by the complex {acrylonitrile…ZnCl2}. ZnCl2 thus influences both the growth and initiation reactions of the polymerization process.

Polysulfone having carbon-carbon double bond on its side chain and its manufacture

Abstract: PURPOSE: To obtain a polysulfone having carbon-carbon double bonds on its side chains, which is excellent in heat resistance and is useful as a resist agent in electric and electronic fields, by the reaction of a specific amino group-containing polysolufone with a carboxylic acid or its active derivative. CONSTITUTION: A polysulfone having carbon-carbon double bonds on its side chains, represented by the formula III (R 11 and R 12 are each H or methyl group, R 21 and R 22 are each H or phenyl group, r 11 and r 12 are each 1W2), is obtained by the reaction of an amino group-containing polysulfone, represented by the formula I [Ar 1 is a 6W10C (2+p) valent aromatic hydrocarbon group, Ar 2 is a 6W 10C (2+q) valent aromatic hydrocarbon group, Ar 3 is a 6W15C divalent aromatic group, X 11 and X 12 are each a bond such as O, etc., p and q are each 0W2, and p+q is 1W4], with a carboxylic acid or its active derivative of the formula II (where R 10 is H or methyl group, R 20 is H or phenyl group, and r 10 is 1W2). COPYRIGHT: (C)1981,JPO&Japio

Di:aryl ketone cpds. prodn. - by reacting aromatic hydrocarbon(s) with aromatic amide cpds. in liquid hydrogen fluoride

Abstract: In a row process for the prodn. of diaryl ketones of the formula Ar-CO-Ar' (I) (where Ar and Ar' are aromatic hydrocarbon residues opt. substd. by gps. inert under the reaction conditions) by reacting of aromatic carboxylic acid derivs. with aromatic hydrocarbons Ar'H in >=90 wt.% HF at elevated temp., there are used as aromatic carboxylic acid derivs. amides of the formula Ar-CO-NH2 (II) and the reaction is carried out at ca 70-150 degrees C pref. ca 100-130 degrees C. (I) are useful e.g. as intermediates for dyestuffs, pharmaceuticals and plant protection agents. (I) are also directly useful as e.g. plastics additives as UV absorbers etc. Practically no catalyst loss occurs in the process, and pollution problems are minimised. The amides. (II) are cheap and simple to produce.

Preparation of 1*44dihydroo9*100dihydroxyanthracene

Abstract: PURPOSE:To prepare the title compound useful as industrial chemicals such as pesticides, easily, in high purity and high rate of reaction, by the isomerization of 1,4,4a,9a-tetrahydroanthraquinone in an inert solvent in the presence of an aromatic sulfonic acid. CONSTITUTION:The compound IV (1,4-dihydro-9,10-dihydroxyanthraquinone) is prepared by the isomerization of the compound III (1,4,4a,9a-tetrahydroanthraquinone) in the presence of 0.02-1 wt.% of an aromatic sulfonic acid, at 50- 150 deg.C. The compound III is prepared by the Diels-Alder reaction of the compound I (1,4-naphthoquinone) with the compound II (butadiene) in an inert solvent (pref. aromatic hydrocarbons such as benzene, alkylbenzene, etc.). The compound I is pref. obtained by the successive and selective extraction of gas obtained by the catalytic gas phase oxidation of naphthalene, first with an aqueous solvent and then with an aromatic hydrocarbon. USE:Accelerator for the digestion of pulp; antioxidant of rubber, raw material of anthrone, etc.

Prodn. of alkyl-aromatic hydrocarbon lubricants - by two=stage reaction of higher olefin with aromatic hydrocarbon

Abstract: Prodn. of long-chain alkylaromatic hydrocarbons is carried out by (a) contacting an 8-18C alpha-olefin (I) with 0.1-1 mole of aromatic hydrocarbon (II) per mole of (I) in the presence of a Friedel-Crafts catalyst at 20-70 degrees C; (b) increasing the temp. to 80-110 degrees C; (c) adding 0.1-1 mole of (II) per mole of (I) over a period of 0.5-10 min.; and (d) isolating the product. The products are useful as high-temp. lubricants. They have a low residual unsatn. (bromine no. 0.5, pref. 0.1-0.2), a low residual Cl content (100, pref. 10ppm), a high 100 degrees C viscosity (6-80, pref. 30-80 cS) and a high VI (e.g. 158).

Hydroalkylation catalyst composition comprising a rhenium, nickel, rare earth zeolite

Abstract: A reaction mixture comprising an aromatic hydrocarbon and hydrogen is contacted under hydroalkylation conditions with a composition comprising at least one rhenium compound supported on a calcined, acidic, nickel and rare earth-treated crystalline zeolite.