Methanol Weekly Topic: What are the requirements for water solubility parameters of pure methanol? 2015.01.04--2016.01.11
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Methanol Weekly Topic: What are the requirements for water solubility parameters of pure methanol? What happens when water solubility fails to meet the requirements? 2015.01.04--2016.01.11 ⑴ The quality specifications for pure methanol require that it remain clear when mixed with water in any proportion ； ⑵If the water solubility is not satisfactory, adding water to pure methanol causes the organic impurities that are insoluble or poorly soluble in water to precipitate as gel-like particles, resulting in turbidity.
The water solubility of methanol is also referred to as its turbidity. According to international standards for methanol quality, pure methanol can be mixed with water in any proportion without causing turbidity; a clear and transparent color indicates that the water solubility meets the requirements. If refined methanol contains trace amounts of insoluble or poorly soluble impurities such as alkanes, olefins, higher alcohols, and aromatics, these impurities precipitate as gel-like particles upon addition of water, resulting in turbidity.
What are the requirements for water solubility parameters of pure methanol? What happens when water solubility fails to meet the requirements? ⑴The quality requirements for pure methanol are that it remains clear when mixed with water in any proportion; (2) it is not water-soluble.
What are the requirements for water solubility parameters of pure methanol? What happens when water solubility fails to meet the requirements? ⑴The quality requirements for pure methanol are such that it remains clear when mixed with water in any proportion ； ⑵If the water solubility is not satisfactory, adding water to pure methanol causes the organic impurities that are insoluble or poorly soluble in water to precipitate as gel-like particles, resulting in turbidity.
For the methanol produced by synthetic distillation, the reason for the unsatisfactory water solubility is the higher hydrocarbons; these are removed in the pre-condenser reflux tank, where, upon addition of water, the hydrocarbons separate as an oil layer and are discharged to the fusel oils tank.