Refined Glycerine 99.7% Min USP 43 (Flexi)

Brief Overview
Glycerine that has been refined, sometimes referred to as glycerol or glycerin, is a simple sugar alcohol that has three hydroxyl groups that contribute to its water solubility and hygroscopic properties. This substance highlights its inherent sweetness and low toxicity with its colorless, odorless, clear liquid appearance. It also has a high boiling point and viscosity. Its boiling point is 290°C, while its normal melting point is 17.8°C. The density of refined glycerine is 1.26 g/cm³. It is derived from petrochemical feedstock and finds application in a variety of sectors, including food, medicine, cosmetics, personal care, and biodiesel production.
Manufacturing Process
Threshing
In the initial stage of palm fruit processing, the primary stem and attached spikelets are meticulously removed through the threshing process, preparing the fruit for further treatment.

Sterilization
The palm fruit undergoes sterilization through steam application, ensuring a high-temperature treatment to prevent oil oxidation and hydrolysis of oil-splitting enzymes. This process also aids in separating the fruit's walls from the kernel, gum, and resin due to enhanced internal moisture from the steam.

Digestion
Mechanical mixing and smashing of sterilized palm fruits occur during digestion, facilitated by a rotating mechanism under elevated temperatures. This process breaks down the pulp and cells, releasing the necessary palm oil with the help of added heat, ensuring smooth mixing.

Pressing
Processed palm fruit undergoes pressing in a robust hydraulic machine, applying pressure in a sturdy metal cage. This method extracts palm oil from the pulp, which is then collected for subsequent processing.

Oil Clarification
Following extraction, additional processing involves oil purification. Hot water is introduced to the oil, addressing moisture, fibrous material, and cell debris. This initiates a separation process, filtering out particles and creating a clear distinction between water and oil layers for further processing and storage.

Deacidification
To eliminate free fatty acids and enhance the oil's shelf life, solvent extraction with methanol is employed. Stirring the combination results in the preferential dissolution of free fatty acids in methanol, a crucial step to prevent oxidation and unwanted odors.

Saponification and Transeferication
Hydrolysis under high pressure and temperature breaks down deacidified palm oil into fatty acid and glycerol/glycerine chains. While glycerine is now ready for extraction, further refinement is necessary before labeling it as refined glycerine.

Glycerin Pre-treatment
Various separation techniques are applied to purify the combination of glycerine and fatty acid chains. Distillation of the oil combination extracts glycerine, utilizing heat to encourage glycerol and fatty acid evaporation, with glycerine evaporating more readily due to its lower boiling point.

Evaporation
Complete refinement of the glycerine requires the elimination of residual methanol from the deacidification process. Evaporating the methanol from the glycerine ensures the production of a thoroughly refined glycerine.