The issue of adding acid in lubricant regeneration technology
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After vacuum distillation of used lubricating oil, a large amount of black substance appears during acid washing, and the oil turns black. What exactly are these substances?
There are many reasons. Could you tell me if it’s a single vaporization or a gradual one? My QQ is 1308926778
One-time gasification or gradual gasification? I don’t understand. What we’re doing in the laboratory right now is to carry out vacuum distillation, and it’s the uncut fractions that are obtained
Those black substances are resins, asphaltenes, various additives, and the substances formed as a result of reactions with sulfuric acid
What is stated on the 2nd floor is whether you use batch heating and distillation in a kettle type setup, or distillation with one-time feeding in a column type setup~
I understand a bit more now; when I first started working with this, I knew nothing at all, haha
It must be impurities and iron or something like that, right?
By oil turning black, do you mean the oil that has been washed turning black? If so, it means you haven’t processed it properly; if it’s processed correctly, it won’t change color. The oil we produce doesn’t change color even after being stored for a year
Compounds resulting from various strong acid reactions. There are many reasons why oil turns black: 1) The concentration and amount of acid used are incorrect; 2) The oil contains water. It is recommended to dehydrate the oil after distillation. Use fuming sulfuric acid with a concentration of over 95%, and determine the appropriate amount by conducting experiments based on the properties of the oil. In general, the amount of acid should not exceed 5% – more acid is not necessarily better