Marvi Industries since 2007 is engaged in the processing, refining, merchandising and distribution of oil seeds products such as rapeseed oil and meal, sunflower seed oil and meal and canola oil and meal.

Marvi Solvent Extraction Plant is the most modern way of recovery of oil from oil bearing materials at very low temperature under vacuum to produce excellent quality of oil, compared to mechanical pressing which works under high temperatures and high pressure and causes oxidation of oil.

Recent developments of the Expander system with the squeezomatic attachment invariably ensures even direct extraction of high oil content material like sunflower, rapeseed, canola producing the best quality of crude oil and completely eliminates the pre-pressing operations of old technology expellers.

Marvi Industries Oil Extraction Solvent Plant

Preparation

An efficient Extraction would need that every oil bearing cell of the material is in contact with the solvent. In other words, the smooth preparation prior to main extraction is very vital to comply with this contact, smaller the material size, better the penetration of the solvent into the oil bearing cells, but too fine a size will prevent the solvent from percolation through the mass. Hence an optimum size is absolutely essential for efficient extraction.

The method of material preparation does vary from material to material depending upon its oil content and physical properties. We group them as follows:

• Oil Cakes
• Oil Bearing Seeds (Soybeans, Sunflower, Rape Seed, Canola)
• Floury Materials (Rice Bran)

In the case of oil cakes, being big pieces, has to be reduced to proper size and without fail, ensuring that there are no ‘fines’. OILTEK Cake Sizer and Cake Cracker are the finest to this process.

In case of high oil content seeds like sunflower, rapeseed, canola it passes through, the well proven OILTEK Expander after cracking, cooking & flaking. Seeds like sunflower, rapeseed, canola will pass through the squeezomatic attachment for squeezing the oil before the collects goes to extraction, passing through updated OILTEK Drier Cooler.

In case of Floury materials like rice bran, etc. any of the above equipment are not workable. Hence an OILTEK Pelletiser or Expander with conditioning arrangement has been used to form pellets before extraction.

The prepared material is transported to the Main Extraction Section via an OILTEK Conveyor.

Oil Milling

In former times, oil extraction was done exclusively with presses. In most oil mills, oil extraction is done with expellers as pre extraction before solvent extraction or as direct press extraction. Oil Mills are used for high oil content seeds like sunflower, rapeseed, canola & In smaller capacity plants, it is mostly used as direct extraction but as the capacity increases, oil mills are used for pre extraction.

In an OILTEK Oil mill, seeds are first fed into daybin from where it is uniformly discharged by a rotary valve controlled with MAC.

Seeds are fed into a seed cleaner where the impurities are separated by pneumatic system. After cleaning, the seeds are fed into expellers. An OILTEK Expeller comes with an individual kettle to heat and cook the seeds so that expelling can be done properly and maximum oil is squeezed to obtain high quality oil and cake.

The oil then passes through a screening tank which will remove foots from the oil which is again fed into the expeller. The oil is then pumped through a filter press to remove any fines and clean oil is collected in the tank below from where the oil is pumped to the storage tank.

If oil mill is used as pre extraction method, then the expelled cakes should be cooled in an OILTEK Cooler before entering the extraction section. Our clients avail from us oil expeller machineries. Our range of Oil mill machineries are made using high quality raw materials. Crushing plants can be fully utilized from the oil expellers. Canola Seed crushing plants, sunflower seed crushing plants and rape seed crushing plants can be best extracted through oil mill. Our clients avail from us oil expeller machineries. Our range of Oil mill machineries are made using high quality raw materials. Crushing plants can be fully utilized from the oil expellers. Canola seed crushing plants, sunflower seed crushing plants and rape seed crushing plants can be best extracted through oil mill. At Marvi, we are offering Sunflower Seed Crushing Plant, Rape Seed Crushing Plants, Crushing Plants, oil mill, oil mill machinery and canola oil mill.

Solvent Extraction Plant

The prepared material is received into the OILTEK Extractor by an OILTEK Conveyor via an OILTEK Air seal in the raw material receiver section, which has an arrangement for controlling the level of material received by the Extractor.

The design of OILTEK Extractor is such that its speed is adjusted automatically depending upon the capacity being processed by means of level controllers coupled with variable frequency drive to its motor.

The Extractor chamber consists of a number of solvent sprayers which in uniform, sprays the solvent over the entire bed of raw material. The length and breadth is designed to give sufficient time for intimate contact, penetration and percolation of solvent into raw material. The Extractor is also designed with light and sight viewing glasses to view the spray distribution.

The material coming out of the spraying chamber is de-oiled material with solvent which is to be recovered in the Desolventising section where it is transported by means of a special OILTEK Solvent Seal Conveyor . The mixture of the oil and solvent called “Miscella” is collected in the Miscella tank from where it is pumped to distillation section.

Bagging

The deoiled meal from the desolventiser toaster is transported to bagging section via OILTEK conveyors with cooling arrangements. In this section the meal is cooled in OILTEK Meal Cooler which comes with blowers for cooling and cyclone for arresting dust particles.

The cooled meal from outlet of the cooler is then screened in a Screener/Grader for separating any large particles which are reduced to smaller fines in OILTEK lump grinder. The meal is then bagged in OILTEK Automatic Bagging Machine.

Refining

Oil Refining means conversion of crude oil for direct human consumption, edible processing, and industrial purpose.

The crude oil obtained from expellers or solvent extraction, contains impurities. To make the oil edible, the impurities must be taken out; such a process is called “Refining”.

Marvi offers two types of refineries.

Batch Refinery
Refining This type of Refinery is used for low capacities from 10TPD to 30 TPD. The advantages are:

• Low Investment
• Easy operation and maintenance
• Effluent generated is less

Continuous Refinery
This type of refinery is used for higher capacities ranging from 30 TPD to 500 TPD and for oils containing high fatty acid (FFA) like Rice Bran Oil etc… The advantages are:

• Very Superior Quality Oil
• Low Processing Cost
• Oil Modification

Hydrogenation
Hydrogenation is an oils and fats modification process.It is mainly used on vegetable oils like rape or sunflower to increase their oxidative stability and to improve their melting properties by reducing their degree of unsaturation. As a result, these oils or fats reach a consistency that is ideal for use as margarine or shortening components

Hydrogenation is a reaction involving the use of a catalyst, most generally nickel, and is also an exothermic reaction.

Careful and precise hydrogenation requires that the constituents – oil, gaseous hydrogen and solid catalyst – should be mixed perfectly. This is done in a closed vessel, by agitation of the catalyst – fatty material suspension in contact with hydrogen.

The purpose of agitation is to promote hydrogen absorption and to maintain a permanent flow of fatty material through the pores of the catalyst. To do this, we use the Hydrogenator, in which hydrogen is forced into the oil and remains in it until the gas is fully consumed. The hydrogenator is batch type. It is equipped with several features to control and master reaction pressure, reaction temperature and the quantity and flow of hydrogen injected, all of which are essential to guarantee selective hydrogenation.

The feedstock used for hydrogenation is usually caustic refined and bleached oil. With the improvement of the degumming processes, there is a tendency to hydrogenate degummed oils. After hardening, those oils are bleached and physically refined.

Main Advantages of this process are:

• Improved gas dispersion;
• Low specific energy consumption;
• Steam production
• Fully automated plant and reliable controls;
• No venting required as hydrogen is entirely consumed at the end of the reaction

Fractionation
The process of fractionation consists of the separation of the liquid part (olein) from the solid part (stearin). In principle the process is very simple, involving:

• Keeping the fat at a controlled temperature to allow crystallization.
• Separate the formed crystals

Marvi has adopted the dry fractionation process operating batch wise, as opposed to centrifugal separation with the aid of detergents or solvent fractionation. With this process oil is kept at a controlled temperature in large tanks with slow stirrers. Crystals form and build into aggregates of several millimetres in diameter. The slurry is pumped through a membrane-filter press for separation of the olein and stearin fraction.

The stearin cake obtained from the membrane filter press is melted in the stearin-melting tank below the press, which also acts as a stearin intermediate tank, prior to storage or packaging.