Pseudomonas putida 39/D oxidized p-xylene to cis-3,6-dimethyl-3,5-cyclohexadiene-1,2-diol (cis-p-xylene dihydrodiol). The latter compound was isolated in crystalline form and its physical properties were determined. The cis configuration of the hydroxyl groups in the oxidation product was inferred from its ability to form an isopropylidene derivative with 2,2-dimethoxypropane. Acid treatment of...

Ogata, M., Takatsuka, Y., and Tomokuni, K. (1971). Brit. J. industr. Med., 28, 382-385. Excretion of hippuric acid and mor p-methylhippuric acid in the urine of persons exposed to vapours of toluene and mor p-xylene in an exposure chamber and in workshops, with specific reference to repeated exposures. Four male volunteers were exposed to 200 p.p.m. of toluene for five one-hour periods separate...

High-efficiency production of xylene/trimethylbenzene from benzene/toluene with methanol is a potential way to promote the implementation on coupled cycle development strategy petrochemical and coal chemical industry optimize resource structure. At same time, relying innovation catalytic new materials, physical chemistry, intelligent capture technology, process engineering, other principles met...

The profiles of major volatile organic compound (VOC) sources in petrochemical industry of the Yangtze river delta, China, were experimentally determined. Source samples were taken using summa canister near the petrochemical units. The concentrations of 72 VOC species were quantified using canister sampling and a gas chromatography–mass spectrometry system, and VOC source profiles were develope...

A novel Raman sensor using a liquid-core optical waveguide is reported, implementing a Teflon-AF 2400 tube filled with water. An aqueous analyte mixture of benzene, toluene and p-xylene was introduced using a 1000 microl sample loop to the liquid-core waveguide (LCW) sensor and the analytes were preconcentrated on the inside surface of the waveguide tubing. The analytes were then eluted from th...

The urinary excretion of hippuric acid and methylhippuric acid was studied in workers (233 subjects; 122 men and 111 women) exposed to toluene and xylenes in combination and in non-exposed controls (281 subjects; 141 men and 140 women) recruited from the same factories or factories of the same regions. Smoking and drinking habits of the subjects were obtained by medical interviews. From each wo...

In this work, the mutual solubilities of sets of ionic liquids ([CnMIM] [TF2N] (n = 4, 8, 12), [C4PY] [TF2N], [C8MIM] [OTF]) and organic compounds (heptane, o-xylene, toluene, or water) are investigated. The experimental data measured for these systems were used to adjust the binary interaction parameters between their components for the Non-Random Two Liquid (NRTL) model. The results showed th...

In 108 workers occupationally exposed to benzene, toluene and xylene the numbers of lymphocytes containing intact lysosomes having cytochemically determined activity of N-acetyl-beta-D-glucosaminidase (NAG) were calculated in the peripheral blood. The benzene, toluene and xylene concentration in the air of at work places were 0-370, 0-580 and 0-506 mg/cu. m, respectively. The phenol concentrati...