Solvent containing pyridine

May be useful if amino acid separations are also performed. / F values tend to be low, and glucose and galactose are not resolved. Use second after solvents containing pyridine to remove it (C)... 

For modest size recovery operation therefore it is worth considering treating a solvent containing pyridine with an acidic ion exchange resin. When... 

In solution, either 2 1 (Co 02)/i-peroxo complexes or 1 1 (Co 02) superoxo complexes have been formed from I or its derivatives. The product which was obtained was dependent on the temperature, solvent, chelating ligand or base which was used [40-42]. A similar complex, [4,4 -ethylenedinitrilo-2-pentanonato] cobalt(II), Co(acacen), II, forms a 1 1 superoxo complex in non-aqueous solvents containing pyridine, equation (8), at temperatures below 0 C [44]. 

This concept was examined by thermally processing Illinois 6 Burning Star SCT-SRC in 5 minute batch autoclave runs (2). A synthetic solvent containing about 40% tetralin was used under a H2 pressure of about 10343 kPa. It was found that temperatures of at least 480°C were required to produce SRCs containing less than 1% sulfur from SCT-SRCs containing 1.3 to 2% sulfur. Pyridine-insol-... 

Pyridine-Methanol 1 1 mix equal volumes of reagent quality of each solvent containing less than 0.10% water. This must be maintained in a protected system... 

Anthracene is obtained from coal lai in the fraction distilling between 300° and 400°C. This fraction contains 5-10% anthracene, from which, by fractional crystallization followed by crystallization from solvents, such as oleic acid, and washing with such solvents as pyridine, relatively pure anthracene is obtained. It may be detected by the formation of a blue-violet coloration on fusion with mellitic add. Anthracene derivatives, espedally anthraquinone, are important in dye chemistry. 

Baglioni et al. [72] showed that poly (y - methyl L - glutamate) may form a monolayer in the a helice or (3 sheet conformation according to whether the spreading solvent did or did not contain pyridine. 

The reaction of these cations with active methylene compounds is often performed in acetic acid containing pyridine.24, 25,29,35-37 Sometimes pyridine 35 or ethanol38,30 has been used as solvent (Eq. 12). In this reaction, pyridine acts as a basic catalyst, but it may also... 

Compounds that contain bonds between lead (II) and transition metals are rare. Dimeric group 14 bridged complexes [R2EM(C0)4]2 (M = Mn and Fe) were obtained from the reaction of [M(CO)4] 2Na+ with R2PbX2 in THF. In the presence of donor solvents like pyridine, THF, DMF,... 

Cleaning Up Combine all aqueous and organic layers from the reaction, add sodium carbonate to make the aqueous layer neutral, and shake the mixture gently to extract pyridine into the organic layer. Place the organic layer in the organic solvents container. Remove any solid (copper salts) from the aqueous layer by filtration. The solid can be placed in the nonhazardous solid waste container and the aqueous layer diluted with water and flushed down the drain. 

Cleaning Up To the filtrate add sodium bisulfite (until a negative test with starch-iodide paper is observed) to destroy any remaining perbromide, neutralize with sodium carbonate, extract the pyridine released with ether, which goes in the organic solvents container. The aqueous layer can then be diluted with water and flushed down the drain. 

Cleaning Up The catalyst removed by filtration should be placed in the nonhazardous solid waste container. The combined aqueous layers from all parts of the experiment containing quinoline and pyridine should be treated with a small quantity of bisulfite to destroy any bromine, neutralized with sodium carbonate, the quinoline and pyridine released extracted into ligroin, and the ligroin solution placed in the organic solvents container. The aqueous layer should be diluted with water and flushed down the drain. After ether is allowed to evaporate from the sodium sulfate in the hood, it can be placed in the nonhazardous solid waste container. Methanol from the crystallization goes in the organic solvents container. 

Oxidations by chlorine are limited to only few types of compounds. In organic solvents and pyridine [681] or hexamethylphosphoramide (HMPA) [682] as cosolvents, primary alcohols are oxidized to aldehydes and secondary alcohols to ketones [681, 682]. Secondary alcohols are oxidized in preference to primary alcohols [681]. Many oxidations with chlorine are carried out in aqueous media and involve sulfur-containing compounds. Mercaptans [683], alkyl thiolcarboxylates [683], thiocyanates [684], isothioureas [684], disulfides [655], and sulfinic acids [656] are transformed into sulfonyl chlorides. The chlorination of dimethyl disulfide in acetic anhydride yields methanesulfinyl chloride [657]. 

Many aromatic compounds yield carbocations on oxidation at a platinum electrode in a nonaqueous solvent like acetonitrile. 2,4,6-Tri-/-butylaniline yields, on anodic oxidation in acetonitrile containing pyridine, the following compounds [140] ... 

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. 

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