Solvent xylene

Use as Solvent. Toluene is more important as a solvent than either benzene or xylene. Solvent use accounts for ca 14% of the total U.S. toluene demand for chemicals. About two-thirds of the solvent use is in paints and coatings the remainder is in adhesives, inks, pharmaceuticals, and other formulated products utilizing a solvent carrier. Use of toluene as solvent in surface coatings has been declining, primarily because of various environmental and health regulations. It is being replaced by other solvents, such as esters and ketones, and by changing the product formulation to use either fully soHd systems or water-based emulsion systems. 

Xylene Solvent, dyes, insecticides, polyester fibres, adhesives, wallpaper, varnish, carpeting, wet-process photocopying, pressed-wood products, gypsum board, water-based adhesives, grease solvents, paints, carpet adhesives. 2.9 3... 

To a flask containing 20 gm (0.08 mole) of methylenebis(4-phenyl isocyanate) in 150 ml of xylene is added 0.03 gm of l-ethyl-3-methyl-3-phospholine-l-oxide catalyst. The solution is refluxed for 4 hr, during which time carbon dioxide is being evolved. The xylene solvent is removed under reduced pressure to afford a nearly quantitative yield of the solid polycarbodiimide. The latter polymer was pressed at 250°C to afford a clear, crystalline, orientable film with a tenacity of about 50,000 psi, an initial modulus of 410,000 psi, and a 20 % elongation at 25°C. 

The chemical composition of the soluble fraction of the first polymer was SiC1.96B0.54H5.i4 and that of the second polymer was SiC3.26Bo.93H7.o3. Oxygen contents were 3-4 wt%. Some of the xylene solvent appears to be incorporated in the polymers as evidenced by the presence of aromatic peaks in the proton NMRs. TGA of the first polymer... 

Fig. 5.4 depicts some results obtained in the first stages (high nuclearity complexes formation) of the synthesis in xylene solvent which leads to the formation of nanostructured powders, RuxSey, from tris-ruthenium dodeca-carbonyl (Ru3(CO)i2) and elemental selenium dissolved in an organic solvent (xylene). After 40 minutes of reaction, l3C-NMR spectrum (Fig. 5.4 (c)) puts in evidence the formation of a new polynuclear chemical precursor with a chemical shift 8 of 198.89 ppm (i.e., Ru4Se2(CO)n)- Selenium takes part in the coordination sphere. The peak intensity with the chemical shift of 199.67 ppm, corresponds to the initial chemical precursor which decreases as a function of the synthesis reaction time (Fig. 5.4(a)). Other chemical shifts (with minor peak intensities) on both sides of the 13C-NMR spectrum, which put in evidence the complex interplay of the reaction, are also observed. 

Polyphenylene oxide Methanol Solvent degrease. Plastic is soluble in xylene and may be primed with adhesive in xylene solvent... 

At 138°C., 3% dicumyl peroxide, monomer mixture B, and xylene solvent. 

Summary TATB is easily prepared by ammoniating trichlorotrinitrobenzene in xylene solvent. The product TATB immediately precipitates upon the addition of the ammonia gas, and continues through out the ammonia addition. After the addition is complete, the product is then filtered-off, washed and dried. Commercial Industrial note For related, or similar information, see Serial No. 813,039, May 13th, 1959, by The United States Navy, to Lloyd A. Kaplan, Adelphi, MD, and 162... 

The ratio of aliphatic protons to aromatic protons for the heavy oil was 4.01/1 and of methylene to methyl 1/1.75. For the asphaltenes, the ratio of aliphatic protons to aromatic protons was 3.49/1 and of methylene to methyl 1/1.1. The asphaltenes were observed to melt at HG C. Molecular weights obtained by vapor phase osmometry (o-xylene solvent) were 407 for the heavy oil and 638 for the asphaltenes. There appears to be little difference in the relative yield of heavy oils and asphaltenes from depolymerized coal as compared with the "as received" coals. Acknowledgements... 

Light and heavy coal tar oil were applied dermally for the lifespan of mice or until persistent papillomas developed at the application site. Test solutions were applied three times weekly in male and female mice. Both produced skin tumors the light coal tar oil contained benzene, toluene, xylene, solvent naphtha, and was the residual oil drained from a naphthalene recovery operation the heavy coal tar oil was a mixture of creosote, anthracene oils, and the oil drained from the naphthalene recovery operation. The heavy oil was less potent compared to the effects observed in the BaP group of the study. 

Comprehensive data for the distribution of actinides, fission products, and inert constituents of ICPP Zr-Al high-level waste into 30 volume % DHDECMP-xylene solvent have been previously reported (10). We have focused our attention recently on a more efficient use of DHDECMP where the diluent is a mixture (2 1) of decalin and DIPB. 

A three-neck round-bottom flask, equipped with a mechanical stirrer, an addition funnel, and a thermometer, was charged with 110 ml of water, 0.11 g of polyvinyl alcohol (surfactant), and 0.02 g of CaC03. This solution was heated to 50°C with stirring. The addition funnel was charged with 16 ml of xylene solvent,... 

Less frequently used than these are hydrochloric acid, carbon disulphide, acetone, chloroform, ethyl acetate, methyl alcohol, amyl alcohol, toluene, xylene, solvent naphtha, etc. 

Refluxing Ru3(CO)12 with the tetramethyldisilylene compound shown below in xylene solvent gives several products. The most interesting of these has the following characteristics ... 

A stirred solution of bicyclo[2.2.1]hept-5-en-2-one (9.85 g, 0.113 mol), morpholine (20.0 g, 0.213 mol), a catalytic amount of TsOH, and xylene (200 mL) was refluxed under an Nj atmosphere for 24 h, using a Dean-Stark trap to remove H2O. The xylene solvent was removed and the residual oil was distilled to give the product yield 6.80 g (23%) bp 170°C/1.4 Torr. On standing the viscous liquid product changed into a crystalline solid which was further purified by sublimation mp 79-80°C. 

The Bureau of Mines is a source of many chemical statistics. The monthly Coke and Coal Chemicals report, part of the bureau s Mineral Industry Surveys, contains, in addition to data on oven and beehive coke production, figures on production of ammonium sulfate, ammonia liquor, naphthalene, benzene, toluene, xylene, solvent naphtha, pyridine, crude coal tar, and cresote oil. Sales and end-of-month stock figures are also shown in the report. A useful feature of the report is the year-end supplement which gives year s totals by months. 

Effect of Functionalization on the Backbone Polymer Molecular Weight. It is important that the functionalization of PS s in the experimental section be demonstrated to have no substantial effect on backbone polymer molecular weight in order for the comparisons that follow to have the desired significance. The PS used in these studies has an intrinsic viscosity of about 0.7 in xylene solvent or in xylene/methanol mixed solvent systems. It is a basic assumption of these studies that if... 

DEMETON or DEMETON O + DEMETON S (8065-48-3) Forms explosive mixture with air (flash point 90-113°F/32-45°C in xylene solvent). Incompatible with strong oxidizers, caustics. 

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