|
| Effect of refining process on the color reversion of soybean oil |
| |
| DOI： |
| KeyWord:soybean oil γ-tocopherol phosphorus metal ion color reversion refining process |
| FundProject: |
|
| Hits: 1221 |
| Download times: 551 |
| Abstract: |
| ：From the refining process of soybean oil, the content changes of trace components affecting the color reversion of soybean oil,such as γ-tocopherol, phosphorus and metal ions during the refining process, and their influence on the colour reversion of finished soybean oil in the storage period together with the addition of auxiliary materials and deodorization conditions were investigated.The results showed that γ-tocopherol lost the most in the deodorization process. It was recommended that the deodorization temperature should be below 250 ℃, and the fine-tuning of the auxiliary materials and the stripping steam pressure had little effect on γ-tocopherol; the hydrated phospholipids could basically be completely removed in the degumming process, and the acid degumming was mainly to remove non-hydrated phospholipids, it was recommended to set the key link of phosphorus content control in the degumming section to reduce the pressure and production cost of the bleaching section of the clay to adsorb and remove phosphorus; metal ions could basically be removed by adsorption of soap stock in deacidification and adsorbents in bleaching. The loss rate of γ-tocopherol and phosphorus content in deodorized oil were positively correlated with the color reversion phenomenon of finished soybean oil during storage, while metal ions had no correlation with color reversion; the dosage of adsorbents and mixed ratio of compound adsorbents had no correlation with the color reversion of soybean oil from different regions. The high citric acid addition inhibited the color reversion of soybean oil stored for one month, but this inhibition was less pronounced as the storage period was extended. The deodorization temperature and stripping steam pressure had no significant correlation with the color reversion of American soybean oil, but it had a significant impact on the color reversion of Brazilian soybean oil. |
| View full text View/Add Comment Download reader |
| Close |
|
|
|
