https://poeb.mpob.gov.my Malaysian Palm Oil Board (MPOB) Sun, 29 Mar 2020 17:14:05 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://poeb.mpob.gov.my/mongana-basics-part-19-plasticity/ Sun, 29 Mar 2020 17:13:58 +0000 https://poeb.mpob.gov.my/index.php/2020/03/29/mongana-basics-part-19-plasticity/ In order to satisfy the user’s oil of fairly constant plasticity, we have studied the relationship between the composition of the glycerides and the plasticity. At the same time, a survey was carried out on the plasticity of a few Congo oils.

]]> 1125 https://poeb.mpob.gov.my/mongana-basics-part-18-deperoxidation/ Sun, 29 Mar 2020 17:13:58 +0000 https://poeb.mpob.gov.my/index.php/2020/03/29/mongana-basics-part-18-deperoxidation/ As the increase in peroxide value is considered as a sign of deterioration in the quality of oil, possible ways of lowering this value were investigated.  The lowering of the peroxide value can be achieved through reduction, in the chemical sense of the word.  The laboratory results were very conclusive and the industrial implementation led to a marked decrease in peroxide value but it was not possible to reduce it to nil as in laboratory experiments.  The reason lies probably in the lack of intimate contact between the oil and the reducing agent.

]]> 1130 https://poeb.mpob.gov.my/mongana-basics-part-17-oxidation-of-oil/ Sun, 29 Mar 2020 17:13:58 +0000 https://poeb.mpob.gov.my/index.php/2020/03/29/mongana-basics-part-17-oxidation-of-oil/ Simplified Theory: Olefinic chains in contact with air undergo a slow oxidation process (becoming rancid). The primary degree of this deterioration is the formation of hydroperoxides which attach  themselves to the carbon atom adjacent to the double bond.

]]> 1135 https://poeb.mpob.gov.my/mongana-basics-part-16-study-of-the-quality-and-characteristics-of-oil/ Sun, 29 Mar 2020 17:14:05 +0000 https://poeb.mpob.gov.my/index.php/2020/03/29/mongana-basics-part-16-study-of-the-quality-and-characteristics-of-oil/ This has been studied on samples of oil stored in sealed tubes. It is virtually impossible in that case to determine the value of the reaction constant k because a plot of logarithm of acidity against time leads to curves having their concavity towards the t axis. The apparent rate of the reaction decreases very quickly as the reaction proceeds. Furthermore, aberrant results are recorded frequently owing to the very small amounts of moisture to be determined

]]> 1141 https://poeb.mpob.gov.my/mongana-basics-part-14-study-of-the-quality-and-characteristics-of-oil/ Sun, 29 Mar 2020 17:14:05 +0000 https://poeb.mpob.gov.my/index.php/2020/03/29/mongana-basics-part-14-study-of-the-quality-and-characteristics-of-oil/ In the preceding chapters, the conditions required to produce a pure oil, that is free impurities and moisture were examined. Other criteria make it possible to assess the quality of crude palm oil.

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