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Formaldehyde Molecular States in the Gas Phase.

PB89131205

Publication Date	1987
Personal Author	Utterback, D. F.
Page Count	6
Abstract	The gas phase reaction of N,O-bis-(trimethylsilyl)trifluoroacetamide (BSTFA) with polar organics was validated. Quantitative yields were obtained for alcohols, glycols, glycol ethers and amines using the gas phase derivatization method. These values were then compared with the expected yields from vapor pressure tables. For the formation of methylene-glycol from the reaction of formaldehyde (50000) with water, equilibrium constants were estimated at temperatures ranging from 20 to 40 degrees C. Gas streams of formaldehyde in air were produced by a gas phase monomeric formaldehyde generator based on acid catalyzed depolymerization of s-trioxane. The formaldehyde was subsequently reacted with water vapor in the air. The chromotropic-acid method was used to determine the concentration of formaldehyde equivalents and BSTFA derivatization method to determine the concentration of methylene-glycol. Temperature dependency of the equilibrium constant is graphed.
Keywords	Formaldehyde Gases Glycols Chemical equilibrium Water vapor Quantitative analysis Molecular structure CAS 50-00-0
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	99D - Basic & Synthetic Chemistry 99A - Analytical Chemistry
Corporate Authors	South Carolina Univ., Columbia. Dept. of Environmental Health Sciences.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
Title Note	Final rept.,
NTIS Issue Number	198906

Formaldehyde Molecular States in the Gas Phase.

Formaldehyde Molecular States in the Gas Phase.
PB89131205

Publication Date	1987
Personal Author	Utterback, D. F.
Page Count	6
Abstract	The gas phase reaction of N,O-bis-(trimethylsilyl)trifluoroacetamide (BSTFA) with polar organics was validated. Quantitative yields were obtained for alcohols, glycols, glycol ethers and amines using the gas phase derivatization method. These values were then compared with the expected yields from vapor pressure tables. For the formation of methylene-glycol from the reaction of formaldehyde (50000) with water, equilibrium constants were estimated at temperatures ranging from 20 to 40 degrees C. Gas streams of formaldehyde in air were produced by a gas phase monomeric formaldehyde generator based on acid catalyzed depolymerization of s-trioxane. The formaldehyde was subsequently reacted with water vapor in the air. The chromotropic-acid method was used to determine the concentration of formaldehyde equivalents and BSTFA derivatization method to determine the concentration of methylene-glycol. Temperature dependency of the equilibrium constant is graphed.
Keywords	Formaldehyde Gases Glycols Chemical equilibrium Water vapor Quantitative analysis Molecular structure CAS 50-00-0
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	99D - Basic & Synthetic Chemistry 99A - Analytical Chemistry
Corporate Authors	South Carolina Univ., Columbia. Dept. of Environmental Health Sciences.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
Title Note	Final rept.,
NTIS Issue Number	198906