Methane-soluble extracts

C. (E)- -Iodo-4 -phenyl-2-butene. In a 20-ml., round-bottomed flask are placed 2.0 g. (0.008 mole) of 2-(4/-phenyl-l -buten-3 -yl)thio-2-thiazoline, 5 ml. of methyl iodide [Methane, iodo-], and 2 ml. of di-methylformamidc. The resulting solution is heated at 75-80° for 2.5 hours under a nitrogen atmosphere (Note 13), cooled, and poured into 10 ml. of water. Extraction with three 12-ml. portions of ether separates the product from water-soluble by-products. The extracts are combined, washed with 8 ml. of 1% aqueous sodium thiosulfate and two 8-ml. portions of water, dried over anhydrous magnesium sulfate, and filtered to remove the drying agent. Removal of ether by distillation at 30° (100 mm.) leaves 1.5-1.7g. (74-82%) of ( )-l-iodo-4-phenyl-2-butene (Notes 14 and 15). 

It is prepared by dropwise addition of 70% H202 to a solution of benzoic acid dissolved in methane solphonic acid and keeping the temperature around 25-30°. After the addition the solution is cooled to 15°, diluted with ice and cold saturated (NH4)2S04 solution to decrease the solubility. It is finally extracted with benzene. The solution is directly used for epoxidation and other reactions. 

Properties and extraction processes Aquifer gas, also referred to as geo-pressured gas or brine gas, is natural gas found dissolved in aquifers, primarily in the form of methane. The solubility of natural gas, and thus the methane content of the water, can vary significantly, and depend on factors, such as the total pressure, temperature, salt content of the water and amount of other gases dissolved. The amount of gas dissolved in underground liquids increases substantially with depth. A general rule is that the deeper the aquifers and the higher the pressure, the higher the gas content. At depths down to 5 km, up to 5 m3 of methane can be dissolved per m3 of water in aquifers under normal hydrostatic pressure (load of water) under lithostatic pressure (load of water and rocks), this factor may increase to more than... 

This is an example of an acid-base extraction. The solid mixture (e.g. 4.0 g for the solvent volumes used below) of benzoic- acid and naphthalene is soluble in dichloro-methane but benzoic acid will dissolve in dilute aqueous sodium hydroxide (2IV ) by forming the sodium salt (sodium benzoate). Naphthalene is insoluble in water. 

Mercury bis-a-acetyl-a-isopropyl or Mercury-bis-aceto-di-methyl-methane, [CHgCO.CMeg—JgHg.—Mercuric dimethyl aceto-acetate is heated in a vacuum at 90 C., when it is found to lose two molecular equivalents of carbon dioxide, which is shown by the loss in weight. The resulting mass is extracted with acetone, and the solvent removed m vacuo, the product isolated melting at 120 C. It is soluble in acetone, alcohol, toluene, or xylene, but only slightly soluble in ether. Mercuric sulphide is split off from it by the action of ammonium sulphide, but no mercuric oxide is formed when sodium hydroxide is added. The compound soon decomposes with the deposition of metallic mercury. 

Irradiation of the lipid (fet soluble) phase of a meat extract does not produce the characteristic off-odor while irradiation of the aqueous (water soluble) portion of die meat extract results in a typical irradiation odor (20). 3) Irradiation of sulfur-containing amino acids or polypeptides produced a similar off-odor as the irradiation odor (21). 4) The amount of VSCs increased with radiation dose while volatiles from lipids were not always correlated with radiation dose (19). Several earlier researchers suggested that hydrogen sulfide (H2S) and methanethiol (MT) were important for the development of the off-odor (12, 20, 22). Patterson and Stevenson (23), using GC-olfactory analysis, showed that dimethyl trisulfide (DMTS) was the most potent off-odor compound in irradiated raw chicken meats followed by cis-3- and trans-6-nonenals, oct-l-en-3-one and bis(methylthio-)methane. Aim and his colleagues have published extensively on irradiation-induced volatile compounds in raw meats (11). They have identified MT, dimethyl sulfide (DMS), dimethyl disulfide (DMDS) and DMTS in different types of irradiated raw meats using GC-FID and GC-MS. 

Demeon D Dimethyl ether DME Dymel A EINECS 204-065-8 Ether, dimethyl Ether, methyl HSDB 354 Methane, oxybis- Methoxymethane Methyl ether Methyl oxide Oxybismethane UN1033 Wood ether. Used as a solvent, motor fuel and Aerosol propellant, in refrigerants, as an extraction agent, a catalyst and stabilizer in polymerization. Gas mp = -141.5° bp = -24,8° Xm = 163,184 nm (s = 3981, 2512, gas) slightly soluble in CeHe, soluble in H20, EtOH, Et20, Me2CO. 

Dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methan-one. Benzophenone, 2,3, 4,4, pentahydroxy- C.l. 75240 C.l. Natural Yellow 11 (3,4-Dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methanone EINECS 208-268-2 Fustic extract Kino-yellow Laguncurin Maclurin Maklurin Methanone, (3.4-dihydroxyphenyl)(2,4,6-trihydroxy-phenyl)- Morintannic acid Moritannic acid NSC 83240 Patent Fustin 2,3, 4,4,6-Pentahydroxybenzophenone. Used to dye fabrics. Crystals mp = 222-223° soluble in H2O (0.48 gtlOO ml), more soluble in organic solvents. 

The extraction of uranl jm by hexone Is facilitated by the presence of substituted ammonium nitrates which are sufficiently soluble in the organic solvent. A number of these salts and their effect on the extraction of uranium are listed In Table XV.— Trl-n-butylamlne, 2-hexyl pyridine, and dlbenzoyl methane Increase the extraction of fission products.-22 . Maeck, et al. have Investigated the extraction of uranitim by hexone from an aqueous solution containing alumlnxim nitrate and tetrapropylammonlum nitrate. 

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