QUALITY CONTROL METHODS FOR SCU PRODUCTION

A method is described for determining total coating weight and dissolution rate which are basic quality control indicators. The Method can be completed in one-half hour or less. The utilization of a microwave oven to dry the filter and residue from a slurried, weighed sulfur-coated (SCU) sample is described as well as the development of an evaluation procedure that involves continuous agitation of slurries of SCU samples in a mist-action shaker for hours. Another test that was developed was the "dip" method in which samples of SCU were placed in wire bags and dipped in warm water a few times a minute. The procedure developed at TVA involves the use of ultrasonic energy to decrease the time required for the controlled release of urea from the coated granules.

• Corporate Authors:

  Sulphur Institute

  1725 K Street, NW
  Washington, DC  United States  20006
• Authors:
  • Scheilo, R M
  • McClellan, G H
• Publication Date: 1976-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 5-7
• Serial:
  • Sulphur Institute Journal
  • Volume: 12
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Coatings; Manufacturing; Quality control; Sulfur; Urea
• Subject Areas: Design; Environment; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00145051
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 1977 12:00AM