Evaluating the Options: Recycling Hydrofluoric Acid

Details

• Personal Author:
  Kavanagh J ; Krageschmidt D
• Description:
  A substance commonly used in the semiconductor industry because of its unique abilities to etch silica is hydrofluoric acid (HF). Hydrofluoric acid, by volume, is one of the largest Resource Conservation and Recovery Act (RCRA) regulated hazardous waste streams generated by the semiconductor industry. To find out if a method exists today to reduce the amount of HF waste being disposed, a survey was conducted of the semiconductor industry to see what options currently exist for recycling HF. The goals of the survey were to uncover the current techniques used by the semiconductor industry to recycle HF, determine the most cost effective method for recycling HF, and also to learn the advantages and disadvantages of recycling HF. According to the results of the survey, the most common method of recycling HF for the semiconductor industry involves the precipitation and flocculation of calcium fluoride (CaF2). The CaF2 filter cake can be sold to another industry to be used in that industry s process. This method along with the crystallization method and the ion exchange method are discussed. [Description provided by NIOSH]
• Subjects:
  Acids Hazardous Substances Occupational Health Safety Semiconductors
• Keywords:
  Hazardous-materials Hazardous-waste-cleanup Hazards
• ISSN:
  1084-578X
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Minnesota ; OSHA Region 3 ; OSHA Region 5 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1
• Volume:
  1005
• Issue:
  1
• NIOSHTIC Number:
  nn:20029711
• Citation:
  SESHA J 2005 Jan; 1005(1):1
• CAS Registry Number:
  Hydrofluoric acid (CAS RN 7664-39-3)
• Federal Fiscal Year:
  2005
• Performing Organization:
  West Virginia University, School of Medicine, Institute of Occupational and Environmental Health, Morgantown, West Virginia
• Peer Reviewed:
  True
• Start Date:
  19970701
• Source Full Name:
  SESHA Journal
• End Date:
  20050630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ed3de9d70b1fd849bd428abd4f604746a9ea9fc9b17520c152b4012a96345f5ab481d202f2966f22b944d723e4f025ba0349038a96044590334d23b3f81f5780
• Download URL:
  https://stacks.cdc.gov/view/cdc/190636/cdc_190636_DS1.pdf
• File Type:
  [PDF - 106.55 KB ]