The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2002
Filed:
May. 31, 2001
Hae-Soo Kwak, Seoul, KR;
Kyung-Mi Yang, Suncheon, KR;
Other;
Abstract
Disclosed is a method for preparing a water soluble iron-containing microcapsule by use of fatty acid ester, which is advantageous in terms of shortened preparation process of emulsion and microcapsule, the use of tasteless and odorless fatty acid ester as emulsifier, and increased preparation yield of 95% or more while the microcapsule has the size of 2-5 &mgr;m. The method comprises preparing a mixture of a coating agent and iron by mixing polyglycerin stearate with ferric ammonium sulfate in the ratio of 5:1-25:1 and stirring at 500-1200×g for 30 seconds to 2 minutes, said polyglycerin stearate having been mixed with a predetermined amount of water and allowed to stand at 45-60° C. for 5-20 minutes, said polyglycerin stearate and ferric ammonium sulfate serving as the coating agent and iron, respectively; spraying said mixture to a dispersion of 0.01-0.1% surfactant in purified water of 5-10° C. using a sprayer; centrifuging the mixture-sprayed dispersion at 10,000-30,000×g for 5-20 minutes for phase separation; and mixing the lower phase with an equal volume of the dispersion and centrifuging this mixture once or twice.