Showing papers on "Hexane published in 1970"
69 citations
65 citations
TL;DR: The enthalpy of mixing of n -hexane + o -xylene has been measured at 25, 35, and 50 °C as mentioned in this paper, and the experimental results have been fitted to smooth curves.
50 citations
43 citations
TL;DR: In this paper, the excess Gibbs energy per unit volume was found to be a symmetrical function of the volume fraction for the benzene + alkane systems, which is the case for all the systems.
42 citations
39 citations
TL;DR: In this paper, a bimolecular mechanism was proposed to explain both the observed products from the isomerization and hydrocracking reactions as well as the presence of heptanes in the product.
32 citations
TL;DR: Tetrabenzyltitane is prepared by reaction of TiCl4 on dibenzylmagnesium in pentane or hexane at − 20° in the presence of a small amount of ether.
Abstract: Tetrabenzyltitane is prepared by reaction of TiCl4 on dibenzylmagnesium in pentane or hexane at – 20° in the presence of a small amount of ether.
27 citations
TL;DR: In this paper, the authors reported densities and excess volumes at 25°C for the systems of benzene + chlorobenzene, benzene+ cyclohexene, cyclo-hexane, n -hexane and n -heptane.
26 citations
TL;DR: In this article, irradiation in hexane with a low-pressure mercury lamp gives 4 photoproducts in an overall yield of 24% and three of these products were identified as 4, 4, 6, 6-tetramethyl-benzobicyclo [3.1.0] hex-2-ene (5, main product, 14%), 1.1-dimethyl-2, 2.
Abstract: o-Di-isobutenyl-benzene (4) on irradiation in hexane with a low-pressure mercury lamp gives 4 photoproducts in an overall yield of 24%. Three of these products were identified as 4, 4, 6, 6-tetramethyl-benzobicyclo [3.1.0] hex-2-ene (5, main product, 14%), 1.1-dimethyl-2-isopropenyl-indane (6, 8%) and 1-isopropenyl-2, 2-dimethyl-indane (10, 2%). 6 is also formed by irradiation of 5 in hexane.
17 citations
TL;DR: The first three solvents extracted 6% more neutral oil and over 100% more lipophilic phosphorus than the latter three as mentioned in this paper, each of which showed similar rates of extraction, each removed over 70% of extractables with the first of four passes.
Abstract: Flaked cottonseed was extracted with chloroform-methanol-water, chloroform-methanol, hexane-acetone-water, hexane-acetone, hexane and acetone. Amounts of total material in the miscellae were greatest with chloroform-methanol-water and decreased to acetone in the order given above. The first three solvents extracted 6% more neutral oil and over 100% more lipophilic phosphorus than the latter three solvents. All solvents showed similar rates of extraction, each removed over 70% of extractables with the first of four passes.
Patent•
01 Jul 1970
TL;DR: In this paper, a process for producing gasoline from a HEXANE-RICH HYDROCARBON FEED is described, in which a large portion of the N-Pentane produced by the Hexane-Rich HYDROBS is considered to be an Isopentane.
Abstract: A PROCESS FOR PRODUCING GASOLINE FROM A HEXANE-RICH HYDROCARBON FEED WHICH COMPRISES AVERAGING HEXANE WITH ONE OR MORE ALKANES SELECTED FROM THE GROUP CONSISTING OF PROPANE OR BUTANES OR C10+HYDROCARBONS OR MIXTURES OF THE FOREGOING HYDROCARBONS TO OBTAIN AT LEAST C7+HYDROCARBONS, AND CATALYTICALLY REFORMING THE C7+HYDROCARBONS TO OBTAIN REFORMATE. PREFERABLY AT LEAST A PORTION OF THE HYDROCARBONS AVERAGED WITH THE HEXANE IS RAFFINATE DERIVED FROM EXTRACTION FOLLOWING THE CATALYTIC REFORMING STEP. PREFERABLY, A PORTION OF THE N-PENTANE PRODUCED IN HEXANE AVERAGING IS ISOMERIZED TO ISOPENTANE.
TL;DR: In this article, the γ-radiolyses of liquid n - pentane and n -hexane have been thoroughly investigated by means of gas-chromatographic analysis of all the products.
Patent•
23 Nov 1970
TL;DR: In this article, the authors describe a procedure for obtaining relative high yields of isopentane from an ALKANE feed stock, which is used to control the feed stock at an ELEVATED TEMPERATURE in a reaction zone with a catalytic mass.
Abstract: A PROCESS FOR OBTAINING RELATIVELY HIGH YIELDS OF ISOPENTANE FROM AN ALKANE FEEDSTOCK WHICH COMPRISES CONTACTING THE FEEDSTOCK AT AN ELEVATED TEMPERATURE IN A REACTION ZONE WITH A CATALYTIC MASS HAVING (1) AN ALKANE DEHYDROGENATION COMPONENT; (2) AN OLEFIN DISPROPORTIONATION COMPONENT; AND (3) AN ALKANE ISOMERIZATION COMPONENT. THE THREE COMPONENTS ARE SEPARATE AND DISTINCT CATALYST COMPONENTS. PREFERABLY, THE ALKANE ISOMERIZATION COMPONENT CONTAINS A LAYERED CRYSTALLINE ALUMINOSILICATE.
TL;DR: In this article, the activity coefficients for solutions of the isotopie dimethylamines (CHz)ìNH, (CHs)ÐND, (CD3)zNH and (CDs)2ND in w-hexane were calculated from the activity coefficient coefficients for the corresponding values in those cases in which associated amino groups are deuterated.
Abstract: The association constants, the association energies, the heats of evaporation, the solvation energies and the excess functions are calculated from the activity coefficients for solutions of the isotopie dimethylamines (CHz)ìNH, (CHs)ìND, (CD3)zNH and (CDs)2ND in w-hexane. In so far as the accuracy permits a judgement, we have found an increase in the corresponding values in those cases in which associated amino groups are deuterated. However, a reduction is observed for the deuteration of the monomeric amino groups and the deuteration of the groups not involved in association. The increase and the decrease
TL;DR: In this article, electron injection characteristics for different grades of liquid hexane are compared with impurity content for each particular sample; the impurities identified by chromatographic techniques do not appreciably affect the emission and conduction properties.
Abstract: Electron injection characteristics for different grades of liquid hexane are compared with impurity content for each particular sample; the impurities identified by chromatographic techniques. Hexane isomers and other impurities in low concentration (∼ 0.5%) do not appreciably affect the emission and conduction properties. For high current injection the charge carriers are believed to be predominantly formed by electron attachment to molecules of water; a concentration of as low as ∼ 100 ppm having a marked effect on the magnitude of emission.
TL;DR: In this article, α-Tropolone photoisomerises in hexane via 5-hydroxybicyclo[3,2,0]hepta-2,6-dien-4-one (III) to a mixture of bicyclo[ 3, 2, 0]hept-2-ene-4, 6-dione and bicyclo]-3, 2.7dione; the hydroxy-ketone is also formed when α-tropolone is irradiated in water and in methanol.
Abstract: α-Tropolone photoisomerises in hexane via 5-hydroxybicyclo[3,2,0]hepta-2,6-dien-4-one (III) to a mixture of bicyclo[3,2,0]hept-2-ene-4,6-dione and bicyclo-[3,2,0]hept-2-ene-4,7-dione; the hydroxy-ketone (III) is also formed when α-tropolone is irradiated in water and in methanol.
TL;DR: In this paper, the fluorescence spectra of radicals from xylenes have been examined at 88°K and the radical are trapped in crystalline matrixes already used for the benzyl radical.
TL;DR: In this paper, the far infrared absorption spectra of methanol in n -hexane have been measured as a function of concentration (methanol concentration varied from 0.015 to 1.98 mole/litre).
Patent•
28 Oct 1970
TL;DR: In this paper, a crystalline synthetic aluminosilicate zeolite having the X-ray powder diffraction pattern of Table 1 of Specification 1,117,568 is used for isomerizing aliphatic hydrocarbons.
Abstract: 1,210,335. Isomerizing aliphatic hydrocarbons. MOBIL OIL CORP. 24 Jan., 1969 [18 April, 1968], No. 4098/69. Addition to 1,117,568. Heading C5E. Aliphatic hydrocarbons are isomerized using a catalyst comprising a crystalline synthetic aluminosilicate zeolite having the X-ray powder diffraction pattern of Table 1 of Specification 1,117,568. The zeolite may be a ZSM-4 which has the composition where M is cation which may be H, a metal (e.g. Al or rare earth) or both and n is the valence of M. The feedstock may be acyclic or cyclic alkanes or olefins, particularly a butane, pentane or hexane. The isomerization may be carried out at 350-900‹ F., 0-3000 p.s.i.g. continuously or batchwise.
Patent•
13 Apr 1970
TL;DR: In this article, the extraction of oil from seeds and other oil-bearing materials was studied, where the oilbearing material was first treated with a polar solvent such as isopropyl alcohol in aqueous solution and then a second solvent which has a lower polarity and which may be hexane is passed through the once-treated material.
Abstract: The invention relates to the extraction of oil from seeds and other oil-bearing materials. The oil-bearing material is first treated with a polar solvent such as isopropyl alcohol in aqueous solution and then a second solvent which has a lower polarity and which may be hexane is passed through the once-treated material. The treatment with the first solvent facilitates the passage of the second solvent through the material and hence the extraction of the oil from the material. Water may be added to the extract recovered from the treatment with the second solvent, to aid separation of the oil from other constituents of the material.
TL;DR: The complex hydrides, NaR2BeH (R = Prn, Pri, and Bui) are described, together with Li(OEt2)Bui 2BeH, LiBui2-BeH and Na(OMe2)Et2Bui6Be3H2 as discussed by the authors.
Abstract: The complex hydrides, NaR2BeH (R = Prn, Pri, and Bui) are described, together with Li(OEt2)Bui2BeH, LiBui2-BeH, Na(OEt2)4But4Be2H, and Na(OMe2)Et2BeH. Pyrolysis of the isopropyl and of the butyl salts in the range 60–200° results in elimination of olefin and of some dialkyl, R2Be, to leave a residue of sodium beryllium hydrides the composition of which depends on the pyrolysis conditions.Sodium di-isobutylberyllium hydride, which is insoluble in hydrocarbons, dissolves in solutions of di-isobutylberyllium in hexane up to a limit corresponding to the composition Na2Bui6Be3H2. Sodium diethylberyllium hydride combines with diethylberyllium to give a product, NaEt6Be3H, which is insoluble in hexane. Pyrolysis of this salt gives NaEt2BeH.Di-isobutylberyllium may conveniently be characterized as its bispyridine adduct.
Patent•
15 Oct 1970TL;DR: In this article, a process for converting butane and hexane into isopentane is proposed, which comprises (a) isomerizing a C6 rich effluent stream in an isomerization zone by contacting the C6 and butane hydrocarbons with an averaging catalyst having a component which has catalytic activity for alkane dehydrogenation and a component having catalytic active for olefin averaging to obtain an iC5 rich stream.
Abstract: A process for converting butane and hexane into isopentane which comprises (a) isomerizing a C6 rich hydrocarbon stream in an isomerization zone by contacting the C6 rich hydrocarbon stream with an isomerization catalyst at a hydrogen partial pressure between 10 psig and 3,000 psig and a temperature between 100* and 900* F. to obtain a C6 rich effluent stream of increased isohexane content, and (b) averaging at least a portion of the C6 rich effluent stream with butane in an averaging zone by contacting the C6 and butane hydrocarbons with an averaging catalyst having a component which has catalytic activity for alkane dehydrogenation and a component which has catalytic activity for olefin averaging to obtain an iC5 rich stream. Preferably the isomerization step is utilized to simultaneously purify a sulfur contaminated feedstock and isomerize the feedstock before it is fed to the averaging step.
Patent•
15 Oct 1970TL;DR: In this paper, infrared speotroscopy has been used to determine the equilibrium constants at 25, 35 and 45° for hydrogen bond formation in dilute solutions of 2,4,6-trimethylbenzoic acid in cylco hexane, carbon tetrachloride, and benzene.