Production of vinylidene chloride from the thermal decomposition of methyl chloroform.

Details

• Personal Author:
  Craft BF ; Glisson BT ; Meuzelaar HL ; Nelson, James H.
• Description:
  The thermal breakdown of methyl-chloroform (71556) (MC) to form vinylidene-chloride (75354) (VC) was investigated under laboratory conditions that approximate those found in industrial environments. Thermal degradation tests were carried out in the presence of air at temperatures of 206 to 605 degrees-C; a flow technique was used and the initial concentration of MC vapors was about 1900 milligrams per cubic meter. The effect of copper or glass beads was also tested. Gas chromatography and mass spectrometry analysis revealed that both VC and MC were present in samples obtained at 500 to 625 degrees-C; chloroethylene (75014) was detected at 575 degrees or more, while trichloroethylene (79016) was found in all samples. In the presence of glass beads decomposition began at 350 degrees and ended at 605 degrees; VC was obtained in almost stoichiometric amounts; with copper, the reaction started at 180 degrees and it ended at 442 degrees when MC was no longer found. The authors conclude that VC is formed in significant amounts when MC is decomposed thermally, information which has important implications for the field of industrial hygiene, considering the great toxicity of VC; further research is needed to evaluate the extent to which VC is formed from the breakdown of MC in the work environment. [Description provided by NIOSH]
• Subjects:
  Chlorine Compounds Hydrocarbons Mass Spectrometry Occupational Health Safety Solvents Temperature
• Keywords:
  Chlorinated-ethylenes Chlorinated-hydrocarbons Equipment-design Gas-chromatography Mass-spectrometry NIOSH-Grant NIOSH-Publication Organic-solvents Thermal-decomposition Thermal-reactions
• ISSN:
  0002-8894
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 8 ; Utah
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  427-435
• Volume:
  47
• Issue:
  7
• NIOSHTIC Number:
  nn:00163710
• Citation:
  Am Ind Hyg Assoc J 1986 Jul; 47(7):427-435
• CAS Registry Number:
  1,1,1-Trichloroethane (CAS RN 71-55-6) ; Trichloroethylene (CAS RN 79-01-6) ; Vinyl chloride (CAS RN 75-01-4) ; Vinylidene chloride (CAS RN 75-35-4)
• Federal Fiscal Year:
  1986
• Performing Organization:
  Rocky Mountain Center for Occupational and Environmental Health, University of Utah D F C M, Room BC 106 Salt Lake City, Utah 84132
• Peer Reviewed:
  True
• Start Date:
  19780901
• Source Full Name:
  American Industrial Hygiene Association Journal
• End Date:
  19940630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3067555f959c7cfecf0584768f33cba55a9e2adcf10a4c37f451bc91e93de980f109c6a1b52cf6a478c9f12fb612bb1b4ce5e2f756a212c065896658b0cce8ba
• Download URL:
  https://stacks.cdc.gov/view/cdc/185007/cdc_185007_DS1.pdf
• File Type:
  [PDF - 909.16 KB ]