Abstract: Monochloro-substituted saturated compounds may be prepared by condensing a saturated compound such as cycloalkyl hydrocarbon with a chloromonoolefin possessing not more than 4 carbon atoms and having the chlorine atom attached to one of the doubly-bonded carbon atoms in the presence of a free radical-generating catalyst and a promoter comprising a hydrogen chloride compound.
Abstract: In the process for preparing alkenylbenzene by the catalytic reaction of alkylbenzenes and 1,3-butadiene in the presence of an alkali metal catalyst, the improvement which comprises effecting the preliminary contact of the freshly fed alkylbenzene with the reaction product of said catalyst reaction and thereafter catalytically reacting said alkylbenzene with said 1,3-butadiene.
Abstract: A stable 1,1,1-trichloroethane composition containing 1,1,1-trichloroethane and, as the essential acid acceptor, 0.25 to 1 weight percent of a C.sub.4-8 monoepoxide, epichlorohydrin or a mixture of such epoxides and, as the essential stabilizer against metal-induced decomposition, 3.5 to 4.5 weight percent of a three-component system selected from the group consisting of:Dioxane,Trioxane,Dioxolane,T. butyl alcohol, andA C.sub.1-3 nitroalkane or mixtures of nitroalkanes, in a proportion one to the other within the shaded areas of FIGS. 1-9, provided that when a nitroalkane is not present as a member of the three-component mixture, it is added in an amount to provide from about 0.25 to 1 percent by weight of said nitromethane.The composition set forth balances inhibitor content to obtain protection in both the liquid and vapor without excessive losses or concentrations disproportionate with solvent losses through vapor escape or liquid dragout.
Type:
Grant
Filed:
November 25, 1974
Date of Patent:
April 19, 1977
Assignee:
The Dow Chemical Company
Inventors:
Wesley L. Archer, Elbert L. Simpson, Raymond R. Gerard
Abstract: A process for the liquid phase nuclear chlorination of benzenes which uses a novel manganese chloride catalyst in an iron-free reaction environment. The manganese chloride catalyst provides a dichlorobenzene product having a higher ratio of orthodichlorobenzene to paradichlorobenzene than is obtained with conventional commercial liquid phase chlorination catalysts.
Abstract: 1,1,1-TRICHLOROETHANE IS STABILIZED AGAINST DECOMPOSITION INITIATED BY CONTACT WITH IRON BY THE USE OF A COMBINATION OF STYRENE OXIDE, PHENYL GLYCIDYL ETHER OR MIXTURES THEREOF WITH A SECOND CONVENTIONAL STABILIZER OF AN ALCOHOL, A NITRO COMPOUND OR A CYCLIC ETHER.
Abstract: A process for making branched, internally-unsaturated liquid perfluoroolefins that are oligomers of tetrafluoroethylene and have an empirical formula (C.sub.2 F.sub.4).sub.n where n is an integer of 4 to 7, comprising contacting tetrafluoroethylene under anhydrous conditions with at least one fluoride which is a source of fluoride ions, said fluoride being selected from the group consisting of the normal fluorides, acid fluorides and fluorosulphinates of the metals potassium, rubidium and caesium and normal fluorides of a tetraalkylammonium ion, at a temperature of 20.degree. C to 170.degree. C in the presence of an inert solvent selected from the group consisting of dimethylformamide, dimethyl sulphoxide, N-methyl pyrrolidone and hexamethylphosphoramide, and recovering said branched, internally-unsaturated liquid perfluoroolefins from the reaction medium.
Type:
Grant
Filed:
April 25, 1975
Date of Patent:
April 5, 1977
Assignee:
Imperial Chemical Industries Limited
Inventors:
Harold Crosbie Fielding, Alfred John Rudge
Abstract: A process for the chlorination of toluene comprises reacting toluene with chlorine in the presence of a catalyst system comprising a Lewis acid catalyst and a co-catalyst selected from the group consisting of diphenyl selenide and aluminum selenide. The monochlorotoluene product obtained is characterized by a substantially reduced ratio of orthochlorotoluene to parachlorotoluene.
Abstract: Chlorofluorinated aromatic hydrocarbons may be effectively produced by an oxychlorofluorination process by reacting a gaseous mixture of a starting material selected from an aromatic hydrocarbon and an aromatic hydrohalocarbon in which the halo atoms are selected from chloro and fluoro, or mixtures thereof, an oxygen-containing gas, a chlorinating agent selected from the group consisting of HCl and Cl.sub.2 and mixtures thereof, and HF, in the presence of a Deacon catalyst supported by a stable, inert metal salt carrier.
Type:
Grant
Filed:
December 22, 1975
Date of Patent:
March 15, 1977
Assignee:
Allied Chemical Corporation
Inventors:
Henry R. Nychka, Morris B. Berenbaum, Martin A. Robinson, Richard E. Eibeck
Abstract: A combination operation is described and method for upgrading C.sub.2 -C.sub.5 olefin rich streams with selective crystalline zeolite compositions in a fluidized catalyst system at relatively low pressures by reaction with hydrogen or a carbon-hydrogen fragment contributor, such as methanol, to form gasoline and light fuel oil boiling range products.
Abstract: Disclosed is a composition of matter characterized by the structural formula: ##STR1## wherein R.sub.1 is hydrogen or methyl and R.sub.2, R.sub.3 and R.sub.4 are hydrogen, halogen substituted or unsubstituted alkyl groups containing 1 to 4 carbon atoms. Also disclosed are vinyl polymers of the above compounds.
Abstract: Conversion of synthesis gas (a mixture of carbon monoxide and hydrogen) having a smaller hydrogen to carbon monoxide ratio than that required for methanol stoichiometry, i.e. 2 to 1, by passing such over a zinc-chromium-acid or copper-zinc alumina-acid modified methanol synthesis catalyst under conditions conducive to converting the synthesis gas to a mixture of methanol and dimethyl ether as the desirable organic products.
Abstract: A process for the conversion of olefinic hydrocarbons according to the olefin reaction (e.g., the olefin disproportionation reaction) by contacting the olefinic hydrocarbon with a catalyst comprising a coordination compound of molybdenum or tungsten complexed with NO, together with an organoaluminum adjuvant.
Abstract: A process for the preparation of 2,5-dichloro-p-xylene comprises reacting p-xylene with chlorine in the presence of a catalyst system comprising a catalyst selected from the group consisting of halides of iron, halides of antimony and mixtures thereof and a co-catalyst selected from the group consisting of organic sulfur compounds characterized by the presence of divalent sulfur.
Abstract: Hydrogen chloride gas, containing hydrogen fluoride and/or silicon tetrafluoride, is contacted with calcium chloride supported on activated alumina, to separate the hydrogen fluoride and/or silicon tetrafluoride therefrom.
Abstract: In the preparation of isopropyl chloride wherein propylene and hydrogen chloride are reacted at elevated temperature in the gaseous phase in the presence of aluminum oxide as catalyst, the improvement which comprises effecting the reaction at a pressure of about 3 to 8 atm, at a temperature of about 50.degree. to 200.degree. C and in the presence of aluminum oxide having an internal surface area of about 200 to 500 m.sup.2 /g.
Type:
Grant
Filed:
April 16, 1975
Date of Patent:
February 22, 1977
Assignee:
Bayer Aktiengesellschaft
Inventors:
Johann Grolig, Manfred Martin, Gerhard Scharfe
Abstract: Preparation of CCl.sub.3 F and CCl.sub.2 F.sub.2 by countercurrently contacting CaF.sub.2 and CCl.sub.4 under reaction conditions to provide high conversion both of CCl.sub.4 to fluorine-containing products and CaF.sub.2 to CaCl.sub.2.
Type:
Grant
Filed:
March 16, 1976
Date of Patent:
February 22, 1977
Inventors:
Edmund Odon Banas, Wesley Gerald Schindel
Abstract: A more economical method of removing materials adsorbed on solid adsorbents used to treat hydrocarbon streams is presented. The method comprises removing a liquid hydrocarbon stream from a distillation column, vaporizing the liquid stream and superheating the vapors which are formed, passing the superheated vapor through the adsorbent and effecting the removal of the adsorbed material, and then returning the vapor to the fractionation column and utilizing the vapor as stripping media within the column. In the preferred embodiment, water is removed from alumina.
Abstract: Metals are removed from metal- and asphaltene-containing petroleum oils by contacting the oil with pellets of sorptive type attapulgus clay which has been extruded and then dried at a temperature between about 100.degree. and 650.degree. C. to a volatile content of less than 20 weight %.
Type:
Grant
Filed:
May 16, 1975
Date of Patent:
February 1, 1977
Assignee:
Deutsche Texaco Aktiengesellschaft
Inventors:
Hans-Georg Wegner, Wolfgang Kruger, Gunter Sochtig, Gunter Brandes
Abstract: An improved process for the catalytic production of dichlorotoluenes, especially 2,4-dichlorotoluene, formed by reacting para-chlorotoluene with chlorine in the presence of a catalyst to form a mixture of chlorinated toluenes and thereafter separating from said mixture a dichlorotoluene fraction containing 2,4-dichlorotoluene, the improvement comprising reacting para-chlorotoluene in the liquid phase with chlorine gas in the presence of antimony trichloride catalyst. The mixed chlorotoluene product obtained contains in excess of 85% 2,4-dichlorotoluene, which mixture is then treated with a base, catalyst is removed by separation or filtration and the remaining product is distilled to yield a substantially pure 2,4-dichlorotoluene product.