Home Product Batch Type Edible Oil Refinery RBD palm oil refining process

RBD palm oil refining process

Batch Type Edible Oil Refinery / Chat on line / Give me a price / Date:Nov 07, 2017

Palm oil refining machine

RBD palm oil refining process means Refined Bleached Deodorised Palm Oil (RBD Palm Oil) process.
In the past three decades the chemical refining process scheme has gradually been superceded by the more cost-effective and more environmentally-friendly Physical refining processing scheme. In physical refining the process of caustic refining is eliminated, and the vacuum deodorization has been replaced by a higher temperature Steam stripping and deodorization processes that enables the Free Fatty Acids and other impurities to be removed without the use of caustic soda. The term in the Physical Refining indicates that chemicals have not be used to remove the fatty acids. Although caustic soda is no longer utilized in Physical refining, the term RBD is still in use to describe the fully-refined palm oil.

Flow chart of palm oil refining process

In order to increase the oxidative stability and improve the nutritional properties of crude palm oil it is necessary to treat the oil by a series of processes, that are collectively known as refining. The first stage of the palm oil refining is primarily to remove the gums and pro-oxidative trace metals, and is called the degumming stage. Historically, the next stage of the process involved neutralization of the Free Fatty Acids by caustic soda, to remove them in the form of soaps. This palm oil refining process was known as Caustic Refining (and represents the “R” in “RBD”). The next stage utilized bleaching earth to remove pigments, oxidation products, soaps and traces of gums and heavy metals. This is called the Bleaching stage, and is represented by the “B” in “RBD”.
The final stage being a high-temperature vacuum deodorization mainly to remove residual pigments, and oxidation products etc, which would otherwise adversely affect the flavour, odour and rate at which the oil would turn rancid. The Deodorization stage represents the “D” in “RBD”. The fully refined oil was then termed Refined, Bleached and Deodorized Oil, or more commonly as RBD palm oil.

The RBD palm oil refining process consists of 3 major steps :
Degumming : To condition gums (phosphatides) and oxidative trace metals ( such as copper and iron ) with food grade phosphoric acid, citric acid, EDTA etc, for later removal with the spent earth after the bleaching stage
Bleaching : To remove pigments, oxidation products, residual trace metals and phosphatides, and soaps
Steam refining/deodorization : To remove fatty acids, pigments (e.g. carotenoids)

Prev:Degumming and deacidification in oil refining process

Next:Edible oil refining production line

RBD palm oil refining process

contact us

DOING online service