Diethylamine vapor

Diethylalkylacetamide derivatives 45 Diethylamine vapor reagent 86 Diethylene glycol 426 Diethylstilbestrol 80,84,105,413,414,432,... 

Lynch DW, Moorman MJ, Stober P, et al Subchronic inhalation of diethylamine vapor in Fischer-344 rats organ system toxicity. Fundam Appl Toxicol 6 559-565, 1986... 

Lynch and associates (1986) investigated subchronic inhalation toxicity of diethylamine vapors in Fischer-344 rats. Rats exposed to 240 ppm for 6.5 h/day. 

Methyl and 2,4-dimethylthiazole were prepared by the vapor-phase reaction (450 to 500°C) of sulfur with diethylamine and diisopropylamine, respectively (816) yields were 66 and 59%. 

Processes rendered obsolete by the propylene ammoxidation process (51) include the ethylene cyanohydrin process (52—54) practiced commercially by American Cyanamid and Union Carbide in the United States and by I. G. Farben in Germany. The process involved the production of ethylene cyanohydrin by the base-cataly2ed addition of HCN to ethylene oxide in the liquid phase at about 60°C. A typical base catalyst used in this step was diethylamine. This was followed by liquid-phase or vapor-phase dehydration of the cyanohydrin. The Hquid-phase dehydration was performed at about 200°C using alkah metal or alkaline earth metal salts of organic acids, primarily formates and magnesium carbonate. Vapor-phase dehydration was accomphshed over alumina at about 250°C. 

Diethylamine, used in every LSD synthesis, has a very low flash point, and its vapor is irritating. The vapor of DMF is also irritating,... 

Resa, J.M., Gonzalez, C., de Eandaluce, S.O.,andLanz,J. Vapor-liquid equilibrium of binary mixtures containing diethylamine + diisopropylamine, diethylamine + dipropylamine, and chloroform + diisopropylamine at 101.3 kPa, and vapor pressures of dipropylamine, J. Chem. Eng. Data, 45(5) 867-871, 2000. 

TABLE 16.1.2.4.1 Reported vapor pressures Stull 1947 of diethylamine at various temperatures Bittrich Kauer 1962 Kilian Bittrich 1965 ... 

FIGURE 161 2 41 Logarithm of vapor pressure versus reciprocal temperature for diethylamine. 

VOCs are the most well-known air contaminants released by chemical, petrochemical, and other industries. Benzene, toluene, xylenes, hexane, cyclohexane, thiophene, diethylamine, acetone, and acetaldehyde are examples of VOCs [77,78], Possibly, presently the most relevant technology for VOC control is adsorption on activated carbon [135-145], It is a recognized technology, largely applied in industrial processes for the elimination and recovery of hydrocarbon vapors from gaseous streams [77,136], Additionally, it offers several benefits over the others, that is, the opportunity of pure product retrieval for reuse, high removal efficiency at low inlet concentrations, and low fuel/ energy costs [135],... 

Diethylamine will exist solely as a vapor in the ambient atmosphere, and will be degraded in the atmosphere by reaction with hydroxyl radicals the half-life for this reaction in air is estimated to be 5 h. In soil, diethylamine is expected to have high mobility. Volatilization from moist soil surfaces is not expected however, it may volatilize from dry soil surfaces. Biodegradation may be rapid in water. The... 

Reactions with Ammonia and Amines. Acetaldehyde readily adds ammonia to form acetaldehyde—ammonia. Diethylamine [109-87-7] is obtained when acetaldehyde is added to a saturated aqueous or alcoholic solution of ammonia and the mixture is heated to 50-75°C in the presence of a nickel catalyst and hydrogen at 1.2 MPa (12 atm). Pyridine [110-86-1] and pyridine derivatives are made from paraldehyde and aqueous ammonia in the presence of a catalyst at elevated temperatures (62) acetaldehyde may also be used but the yields of pyridine are generally lower than when paraldehyde is the starting material. The vapor-phase reaction of formaldehyde, acetaldehyde, and ammonia at 360°C over oxide catalyst was studied a 49% yield of pyridine and picolines was obtained using an activated silica—alumina catalyst (63). Brown polymers result when acetaldehyde reacts with ammonia or amines at a pH of 6—7 and temperature of 3—25°C (64). Primary amines and acetaldehyde condense to give Schiff bases CH3CH=NR. The Schiff base reverts to the starting materials in the presence of acids. 

Diethylamine 5 1.8 9.1 Dry chemical, carbon dioxide, or alcohol foam Data not available Vapors are heavier than air and may travel a considerable distance to a source of ignition and flash back. Fires are difficult to control because of re-ignition 594 No ... 

The methylamines and ethylamine have vapor pressures above atmospheric at ambient temperatures and are avaiable in the pure form only in pressurized containers. These amines ate also sold as aqueous solutions with vapor piessuies below atmospheric for ease of handling. Diethylamine, triethylamine, and all of the higher mol wt amines ate sold as the pure compounds. 

Diethylamine is a strong irritant to the eyes, skin, and mucous membranes. Contact of the pure liquid or its concentrated solutions with eyes can produce corneal damage. Skin contact can cause necrosis. Exposure to its vapors at 1000-ppm concentration produced lacrimation, muscle contraction, and cyanosis in mice. Repeated exposures at sublethal concentrations produced bronchitis, pneumonitis, and pulmonary edema in test animals. The acute oral toxicity was moderate. 

The vapors of diethylamine form flammable mixtures in air LEL and UEL values are 1.8% and 10.1% by volume in air, respectively. Its reactions with strong acids and oxidizers can be vigorous to violent. It may undergo violent reactions that are typical of lower aliphatic amines. 

Spin-coated films of MPcs show good sensitivity and selectivity toward tert-hu-tylamine, diethylamine, dibutylamine, 2-butanonea, and acetic acid vapors, which depend on both the central metal ion and the peripheral substitutes of the macrocycles [56,57]. 

In this reaction, the course of condensation and the type of products formed depend on several factors, such as the nature of hydroxyaromatic compounds, amines, aldehydes, and the actual ratio of the components in the reaction system. For examples, besides the initial ammonia, this reaction has been extended successfully to both primary amines and secondary amines and among the secondary amines, the reaction particularly works for dimethylamine, diethylamine, and piperidine. In addition, when one of the secondary amines exists in large excess or when dimethylamine or ammonia is removed from the reaction system via vaporization, good yields of pure products are often achievable. Besides the commonly used -naphthol, many other hydroxyaromatic compounds are suitable for this reaction as well, such as phenols, and quinolinols. " It is found that among kojic acid, 8-quinolinol, and 8-hydroxquinaldine, kojic acid is the most reactive compound for the Betti reaction, which reacts with benzylideneaniline in less than 1 day... 

A mixture of l,2-dimethyl-4-phenyl thiosemicarbazide and dimethylbis(diethyl-amino) silane stirred and heated 2 hrs. at 140° in a paraffin bath with distillation of the resulting diethylamine through a column heated by methanol vapor l,2,3,3-tetramethyl-4-phenyl-3-sila-l,2,4-triazolidine-5-thione. Y 85%. F. e. and methods s. K. Riihlmann and E. Ettenhuber, B. 98, 2855 (1965). 

Srivastava, R. Smith, B. D. Total pressure vapor-liquid equilibrium data for benzene + acetonitrile, diethylamine + ethyl acetate, and propylamine + diethylamine binary systems J. Chem. Eng. Data 1986,31, 94-99... 

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