Ozone Application for the Bleaching of Unsaturated Coloring Material

오존을 이용한 불포화 색소물질의 탈색반응

  • Choi, Hyeong-Ki (Department of Industrial Chemistry, College of Engineering, Hayang University) ;
  • Chung, Chang-Nam (Department of Polymer Engineering, College of Engineering, Suncheon University) ;
  • Kim, Jum-Sik (Department of Industrial Chemistry, College of Engineering, Hayang University)
  • 최형기 (한양대학교 공과대학 공업화학과) ;
  • 정창남 (순천대학교 공과대학 고분자공학과) ;
  • 김점식 (한양대학교 공과대학 공업화학과)
  • Received : 1991.06.13
  • Published : 1991.09.30

Abstract

Bleaching effect of ozone on unsaturated coloring material was compared quantitatively with the change of composition of reactants through the ozone oxidation of ${\beta}$-carotene. Beeswax colorized by carotenoids was reacted with ozone in water, 0.5 % and 1.0 % sodium hydroxide solution, and 20 % and 95 % acetic acid solution and bleaching effect of each reaction condition was compared with each other. And then the additive effect of hydrogen peroxide was investigated. Decrease of unsaturated double bond of ${\beta}$-carotene was proportioned quantitatively to the bleaching effect of ozone on ${\beta}$-carotene and was in accordance with the bleaching effect on beeswax. The bleaching effect of ozone on coloring material in 1.0 % sodium hydroxide solution was better than any other condition and the absorbance of beeswax at 390 nm was improved to 0.045 with the addition of hydrogen peroxide(2 % of wax). For the bleaching of beeswax, it was concluded that the ozone oxidation was more effective than physical adsorption.

${\beta}$-carotene의 오존산화반응을 통하여 불포화 색소물질에 대한 오존의 탈색효과와 반응성분의 변화를 정량적으로 비교하였으며, 카로티노이드계 색소가 주요 발색원인물질인 beeswax 에 대한 오존의 산화반응을 물, 0.5%와 1.0% 수산화나트륨수용액, 20% 와 95% 초산수용액에서 실시하여 각 반응계에 따른 탈색효과를 비교검토하였고, 과산화수소의 첨가효과도 검토하였다. ${\beta}$-carotene의 불포화이중결합의 감소와 탈색효과는 정량적으로 비례하였으며 beeswax의 탈색효과도 잘 일치하는 결과를 얻었다. Beeswax의 탈색효과는 1.0 % 수산화나트륨수용액에서 반응한 것이 가장 우수하였으며. 과산화수소의 첨가(왁스의 2%)시 390 nm 에서의 흡광도가 0.045 로 좋은 탈색효과를 얻을 수 있었다. Beeswax의 탈색에 있어 오존산화반응이 물리흡착보다 효과적이라는 결론을 얻을 수 있었다.

Keywords