We are making Batch and Continuous process refineries for edible oils. Both types require mainly three steps of Unit Operation called Neutra-lization, Bleaching, and Deodorization. In addition to it, some oils like palm and rice bran oil requires additional step called Fractionation. Generally, selection of batch vs. continuous depends on refining capacity. Batch set-up is ideal for smaller refining capacities upto 30 Tons per day while larger refining capacities would efficiently operate under continuous process set up. We make wide range of refining capacity set-up from 10 Tons per day up to 1,000 Tons per day state of the art refinery complex.
The sequence of the refining processes is always be 1. Neutralization - 2. Bleaching - 3. Deodorization. Each step of refining removes undesira-ble substances from the oil. Neutralization process step removes Free Fatty Acids from the oils, Bleaching can reduce the oil color and remove any residual impurities from the neutral oil while Deodorization can remove low molecular weight substances which are responsible for undesirable flavor. The first step of refining, Neutralization, can be perform by two methods called Physical and Chemical process. As their names indicate, in chemical process, it requires alkali, sodium hydroxide, to remove Free Fatty Acids from the neutral oil while physical refining can distilled off low boiling point Free Fatty Acids from the neutral oils at high temperature under high vacuum. The chemical process generate soap/soap-stock as a by-product while physical process generate fatty acids with low boiling point substances as by-products.
The second step of refining, Bleaching, can be done under vacuum and requires bleaching earth and carbon as adsorbents to adsorb color bo-dies from the oils. Once the process done under these parameters, spent earth and carbon can be filtered off by means of Filter Press or Pressure Leaf Filter to obtain low color clear oil.
The third step of refining, Deodorization, can be done at high temper-ature around 250 degree celsius and high vacuum by constantly sparging steam through the oil to distilled off low molecular weight substances from the Deodorizer vessel. Then, the oil can be cool off by incoming cold oil followed by coiled cold water circulation into cooling vessel.
Palm and Rice bran oil requires one additional process step, Fractionation, due to both oil contains high percentages of saturated fatty acids. Fractionation can be done by controlled rate cooling of refined oil to form solid particles of saturated fatty acid triglycerides followed by filtering off such saturated triglycerides will produce two products - Saturated and Unsaturated fractions. Fractionation unit comprises of chiller, compressor, condenser and special polymer filter press.
We fabricate and set up refineries which can process any oil efficiently with low maintain costs. We not only manufacture and set up refineries but also provide support to existing refineries to modify their process equipments to run at better efficiencies.