Bangladesh corn embryo oil crude oil refinery plant company

Corn embryo crude oil refinery plant 

Corn oil plant under construction

 Corn oil milling process

Shelled corn enters the system through cleaning machines,which remove foreign material. Cleaned corn then goes to a steep tank holding up to 25,000 bushels, where it soaks in circulating water, maintained at 125 and slightly acidified with 0.1 to 0.2 percent of sulfur dioxide. Steeping the corn for 24 to 48 hours softens the kernel, loosens the hull and germ and swells the endosperm. Steeping takes place in a series of tanks, which are operated in a continuous batch process. 

The water circulates counter currently through the tanks, so when it is finally with drawn from the newest batch, it has a relatively high concentration of soluble. The steeping process facilitates separation of the components of the kerneland loosens the gluten bonds to release the starch.  Discharged steep water, rich in protein at 35 to 45 percent of total solids, is concentrated in vacuum evaporators to a solids content of 35 to 55 percent.  Steep water concentrate is utilized in feed products or in industrial fermentation media.

Softened corn from the steep tanks is coarsely ground with water in an attrition mill to free the hull, the germ and a large portion of the floury endosperm starch and gluten. The slurry of coarsely ground corn is forced under pressure into hydro cyclone, which centrifugally separate the lighter corn germ, which is then carried off to washing screens. Washed germ is conveyed to a dryer and from there to oil recovery facilities.  Washings from the germ are piped to the starch centrifuges.  Heavy fractions from the coarse grinding mills and germ separators are passed through fine grinding mills and washing screensfor fiber separation. Finally, the slurry is sent to centrifuges for separation of gluten (light phase) from starch (heavy phase).

The gluten fraction passes to a centrifugal concentrator and is filtered and dried.  The starch stream goes to washing cyclones fed with fresh water; overflow, containing residual gluten from the ¡°mill starch, is recycled to the starch centrifuge; underflow from the washing cyclones, a suspension of starch containing only about 0.3 percent protein, is passed through a concentrator and dryer, from which the finished starch product emerges.

Corn Germ Oil Refining Process  

Degumming removes phosphatides and other materials that may be precipitated or dissolved from the crude oil by hot water. This step is usually omitted in refineries that process only corn oil, but is used in refineries that are set up to refine soybean oil as well as corn oil. Degumming is accomplished by introducing hot water at a level of 1 to 3 percent of oil volume, or by injecting an equivalent amount of steam to hydrate the phosphatides. The phosphatides, together with certain other materials, absorb water and precipitate from the oil as a heavier phase, which is removed by centrifugation.When degumming is omitted, the refiner depends on an alkali refining step, which uses roughly the same temperature as a degumming operation, to take out the phosphatides along with the free fatty acids (in the form of soapstock) and to reduce color.  Phospholipids, corn lecithin, can be recovered from both degumming and alkali refining residues.

 In the alkali refining step, free fatty acids are neutralized by treatment at 82-100 degree with a small amount of concentrated sodium hydroxide solution.  Alkali refining reduces color and also removes other nontriglyceride substances, which are separated along with the neutralized free fatty acids and hydrated phosphatides, by centrifugation. The alkali treated oil is usually washed with a small quantity of hot water to remove residual soap formed by the alkali treatment.  The separated residues from alkali treatment are sold as soapstock or acidulated soapstock, which contains about 95 percent free fatty acids.

 Bleaching The oil is then decolorized by treatment with acidactivated clays that bleach by adsorbing color bodies, residual soaps and metal complexes from the oil.  In plants producing partially hydrogenated oil along with regular corn oil, bleached oil coming from the filter is piped to the hydrogenation vessel.  When that process is completed, the partially hydrogenated oil is passed through a filter to remove catalyst particles and other extraneous material. Further bleaching, deodorization and filtration yield a clear, pale yellow oil.

Refining of the unmodified oil continues with winterization. Waxes, present in the oil in small amounts characteristically have high melting points and are readily crystallized by chilling in refrigerated vessels. They are then removed by filtration.  This produces a haze-free finished oil when refrigerated.

Finally, deodorization is accomplished by a continuous steam distillation under high vacuum at high temperature 232-260 degree Oil is fed into the top of the distillation tower, while a jet of steam entering at the base carries the volatile odorants with it as it passes upwards and exits near the top.  Condensed exhaust steam contains odor, color, flavor components and the remaining traces of free fatty acids.  The deodorized oil is drawn off at the bottom of the tower, then dried and passed through a polish filter to become the final product, refined corn oil.

Henan Institute Of Grain Machinery Manufacturing Co., Ltd. is established driven by the academy of Henan University of Technology. As a large joint-stock enterprise integrating technology, manufacturer and sales, our company is specializing in the production of grain and oil machinery, agricultural and sideline machinery. 

•10-500T/H oil material first cleaning,drying and storage section turn-key project.

• 100-3000 T/D oil pretreatment, shelling and pre-press workshop turnkey project (soybean hot peeling, bean skin crushing; the soybean extrusion, high oil contained pre-press cake extrusion, and high oil contained embryos puffed; of direct puffed). Rice bran production line turn-key project.
• Leaching workshop turnkey project (Towline extractor, Rotocel extractor, loop type extractor, DTDC separated machine, the full negative pressure evaporation, paraffin wax recovery, leaching workshop degum, phospholipid concentrate).
• 30-1000T/D oil continuous grade two or one physical (chemical) refining production line.
• 10-600T/D sunflower oil, rice bran oil, corn germ oil dewaxing turn-key project
• 10-200T/D Fatty acid esterification production cooking oil production line.  

1.    How can I get your quotation or project?

Please tell me your flowing information:

   What is your raw material?Sunflower,soybean,coconut,peanut,rapeseed or other?

   How much raw material do you want to process per day or per hour?

   Do you need crude oil or refined oil?

2.    How can I believe in your company?

We have more than 30years in all kinds of vegetable oil material machine production,and we have all kinds of production certificates,such CE,BV,ISO9001 and more,please visit our web:, and you will know more of us.

3.    What is your sales-after services?

Please don’t worry,dear,if we have chance to cooperate with each other,once we signed the contract,we will build special project service team for you,from the drawing to the production,we will have special workers for all process tracking.And we will arrange our special engineers to go your project site for installation and guidance.

4.    What is your MOQ?

At the moment,about the quantity,we have no special requirements,even if you just order one sets,we will do our best for you.

5.    What is material of your machine?

Usually,the parts which contact with oil directly and the important are stainless steel,other part is carbon steel or Si-Mn steel and other.And we can design it according to your requirements.

Such Our machine is of high quality, such as valves from Siemens, bearings from SKF,gear box from SEW, etc.. Automatic welding machine, X-ray test machine, steel rolling machine and others are equipped completely, which won customers’ trust from Europe, America, Mideast, Romania, etc.