METHOD AND DEVICE FOR EXTRACTING OIL FROM SEEDS

Description

[0001] The invention relates to a process for extracting oil from oil-containing seeds by pressing, wherein, optionally, in addition to mechanically pressing the oil, the yield of the extraction process is improved by the addition of carbon dioxide as an extraction agent.

[0002] Furthermore, the invention relates to a device for extracting oil from oil-containing seeds in the sense of an oil press, wherein, optionally, in addition to the mechanical pressing of the oil, the yield of the extraction process is improved by the addition of carbon dioxide as an extraction agent.

[0003] Such methods and devices are used to press oil from oil-bearing seeds. For this purpose, the pressed material is fed into a pressing device, for example, a screw press, in which the oil is extracted from the pressed material by mechanical pressing, thus separating the solid and liquid components of the pressed material.

[0004] To support the pressing process and to increase the oil yield, it is already known to mix the pressed material with an extraction agent. By dissolving the extraction agent in the extract (oil), a significant reduction in viscosity (flowability) can be achieved, so that the extract can flow off more easily.

[0005] One such extraction agent is carbon dioxide, for example, which is mixed with the pressed material in the form of supercritical carbon dioxide, and the oily extract is then dissolved in the supercritical carbon dioxide at very high pressures. In physical terms, the supercritical state describes a state of matter in the transition from the gaseous to the liquid phase of carbon dioxide. The extract dissolved in the supercritical carbon dioxide is extracted in its pure form by evaporating the carbon dioxide after it has been discharged from the press. The evaporated carbon dioxide is either released into the atmosphere or recompressed and reused.

[0006] The provision and handling of supercritical carbon dioxide and the necessary equipment design for handling this extraction agent in relatively small quantities are taught, for example, in EP1717014 B1.

[0007] DE 10 2007 014 775 A1 proposes methods and devices of the aforementioned type which enable an improvement in the product quality of the oil obtained, in particular for use in the production of edible oil, which is achieved in particular by limiting the temperature of the extract to a maximum of 60°C during the entire extraction process.

[0008] WO 2014 / 059273 A1 already discloses a device according to the preamble of claim 1 and a method for extracting oil from seed. The pressed material is first conditioned with respect to temperature and humidity and then pressed. The conditioning is recorded by a measuring device.

[0009] Another device and method for extracting oil from seeds are described in EP1717014 B1. Here, too, the seed is first conditioned and then pressed to extract the oil.

[0010] The oil yield of the entire extraction process depends, regardless of the addition of an extraction agent, also significantly on the moisture and fiber content of the pressed material.

[0011] To optimize oil yield, it is necessary to determine the moisture and fiber content of the pressed material and to adapt the extraction process accordingly.

[0012] The state of the art involves taking samples of the pressed material at defined intervals, which are then analyzed for moisture and fiber content in a stationary laboratory device. Based on the analysis results, appropriate control values, such as a new control value for the control valve, are then manually specified in the process control system.

[0013] According to the state of the art, with the above-mentioned methods and devices, oil yields of approximately between 52% and 55% during pre-pressing and approximately 84% + / - 8% during post-pressing are standard.

[0014] An object of the invention is to provide a device for extracting oil from seeds which enables an increased oil yield.

[0015] This object is achieved according to the invention by a device for extracting oil from seeds according to patent claim 1.

[0016] A further object of the invention is to provide a method for extracting oil from seeds which enables an increased oil yield.

[0017] This object is achieved according to the invention by a method according to claim 6.

[0018] A further object of the invention is to provide a device for extracting oil from seeds which enables improved energy efficiency.

[0019] This object is achieved according to the invention by a device for extracting oil from seeds according to patent claim 1.

[0020] A further object of the invention is to provide a process for extracting oil from seeds which enables improved energy efficiency.

[0021] This object is achieved according to the invention by a method according to claim 6.

[0022] The dependent claims disclose advantageous embodiments of the device and method according to the invention.

[0023] The features of a device according to the invention for extracting oil from seeds disclosed below are part of the invention both individually and in all possible combinations.

[0024] A device according to the invention for extracting oil from seed has at least one mechanical pressing unit into which seed can be fed, for example in flake form or already as a press cake during the subsequent pressing.

[0025] In a preferred embodiment of the invention, the mechanical pressing unit is designed as a screw press comprising a press basket in which a screw is rotatably mounted. The screw is driven by a press drive.

[0026] In a particularly preferred embodiment of the invention, the press drive is designed such that the speed can be changed during operation. If the press drive is designed as an electric motor, the speed of the press drive can be changed, for example, via a frequency converter.

[0027] The press basket is permeable to the pressed oil, allowing it to exit the press basket along its length, while the pressed material is conveyed through the entire press basket by the screw conveyor. At the end of the press basket, the mechanical pressing unit has an outlet for the press cake, which essentially consists of the solid components of the pressed material and the remaining oil content.

[0028] A device according to the invention for extracting oil from seeds can have several mechanical pressing units, which can be arranged one behind the other or working in parallel.

[0029] In one embodiment of the invention, a dosing device is arranged in front of the at least one mechanical pressing unit, which is designed, for example, as a dosing screw and with which the quantity of the material to be pressed fed into the associated mechanical pressing unit can be controlled.

[0030] To regulate the moisture content of the supplied pressed material, the device according to the invention for extracting oil from seed has at least one conditioner.

[0031] With the help of at least one conditioner, the material to be pressed can be heated to a predetermined temperature and moisture can be removed from the material to be pressed.

[0032] In a preferred embodiment of the invention, the at least one conditioner is designed as a tube bundle conditioner, as a drum conditioner or as a heating pan, with which the pressed material can be treated by supplying steam, hot water or condensate.

[0033] A drum conditioner is essentially a horizontally extending, cylindrical conditioner with a double jacket for indirect heating of the pressed material with saturated steam. Intensive mixing of the pressed material by the drum conditioner's agitator results in a highly homogeneous treatment, and the agitator is suitable for indirect heating with saturated steam. A very effective drying effect can be achieved through direct vapor removal.

[0034] A tube bundle conditioner is also a largely horizontally extending cylindrical conditioner with a centrally positioned steam-heated tube bundle. The entire drum is rotatable. For homogeneous treatment of the pressed material, the rotation and the heating tube bundle can be individually adjusted along the entire length of the tube bundle conditioner. A very good drying effect can be achieved through direct vapor removal.

[0035] In a preferred embodiment of the invention, the humidity and temperature of the pressed material, which can be controlled by means of the conditioner, can be adapted to the specific requirements of different types of pressed material, depending on which pressed material is to be processed.

[0036] In one embodiment of the invention, the humidity can be controlled in a range of approximately 1% to 5% and the temperature in a range of 85°C to 120°C.

[0037] In one embodiment of the invention, a moisture content of approximately 3% and a temperature of approximately 104°C can be achieved with the aid of the conditioner for a material to be pressed, for example, rapeseed.

[0038] In the area of ​​the at least one conditioner, at least one first measuring device for detecting the temperature and / or the humidity and / or the fiber content and / or the oil content of the pressed material is arranged.

[0039] In a particularly preferred embodiment of the invention, the first measuring device comprises at least one NIR (near-infrared)-based measuring device capable of emitting light in the near infrared (approximately 900 nm to 1700 nm wavelength). Furthermore, the NIR-based measuring device comprises a receiver unit capable of determining, among other things, the moisture content, oil, protein, and / or phosphatide content, and fiber content of the pressed material through spectroscopic analysis based on the absorption of the emitted infrared light by the pressed material.

[0040] In a further preferred embodiment of the invention, the NIR-based measuring device is designed using NIR online technology. NIR online technology, as defined in this document, is based on measuring the wavelength-dependent absorption in the measurement spectrum of the infrared light reflected by the pressed material. The use of reflected infrared light has the advantage that the NIR-based measuring device only needs to be arranged on one side of the process, thus enabling a compact design. This also enables measurements with large bed heights and opaque media.

[0041] Furthermore, in NIR online technology, the light reflected from the sample is first parallelized, thus eliminating any time loss during measurement. Compared to conventional NIR measuring devices, a sample can be measured using NIR online technology in approximately 20 ms instead of 20 to 30 s. An NIR-based measuring device using NIR online technology has at least one diode array and a large measurement window opening (in one embodiment with a diameter of approximately 4 cm), allowing the measurement to be performed over a relatively wide cross-section of the sample. This essentially eliminates outliers in the measured values, which are otherwise easily caused by individual seeds.

[0042] In one embodiment of the invention, the NIR-based measuring device can be integrated into the conveyor system that conveys the pressed material to the conditioner or from the conditioner to the mechanical pressing unit, or into a pipeline with a separate sight glass. Due to the close proximity of the NIR-based measuring device to the process, the immersion depth is approximately 5 mm, so that not only the shell or outer layer of the pressed material is detected, but also the inner layers, enabling precise analysis.

[0043] In one embodiment of the invention, at least the moisture, fiber content and oil content are detected using another non-NIR based technology.

[0044] In one embodiment of the invention, the first measuring device has at least one temperature sensor, which is designed, for example, as a PT 100 sensor.

[0045] In a preferred embodiment of the invention, the first measuring device comprises at least one NIR-based measuring device for detecting the moisture and / or oil and / or protein and / or phosphatide content and / or fiber content as well as at least one temperature sensor.

[0046] In a particularly preferred variant of the aforementioned embodiment, the NIR-based measuring device is designed using NIR online technology.

[0047] In one embodiment of the invention, the conditioner has at least one steam control valve with which the supply of hot steam to the conditioner can be regulated.

[0048] The steam control valve is advantageously equipped with an actuator and is designed, for example, as a rotary cone valve, a globe valve, a butterfly valve, a ball valve, a diaphragm valve or as a slide valve.

[0049] In a preferred embodiment of the invention, based on the measured values ​​recorded by the first measuring device, the amount of heat energy supplied to the material to be pressed in the conditioner can be adapted precisely to the actual requirements as a function of time, so that the supply of more heat energy than required is avoided, so that energy can be saved.

[0050] According to the invention, at least one feed device for an extraction agent is arranged in the region of at least one mechanical press of the device for extracting oil from seed, with which feed device an extraction agent can be introduced into the pressing chamber of the mechanical press.

[0051] In one embodiment of the invention, the supply device for an extractant has a flow control device for controlling the amount of the supplied extractant.

[0052] In one embodiment of the invention, the flow control device is designed as a control valve, which can be designed, for example, as a rotary plug valve, a globe valve, a butterfly valve, a ball valve, a diaphragm valve or a slide valve, and has a servo motor.

[0053] According to the invention, the supply device for an extraction agent is designed as a supply device for carbon dioxide, wherein the amount of carbon dioxide to be injected into the pressing chamber is preferably controllable via a flow control device designed as a gas control valve.

[0054] In a further embodiment of the invention, the device for extracting oil from seeds has at least one pressure sensor.

[0055] In a further embodiment of the invention, the device for extracting oil from seeds comprises at least one mass and / or volume flow measuring device.

[0056] In an advantageous embodiment of the invention, the at least one pressure sensor and / or the at least one mass and / or volume flow measuring device can be used to control the steam supply to the at least one conditioner and / or to control the supplied amount of extraction agent.

[0057] In one embodiment of the invention, the device for extracting oil from seed material has a second measuring device which is arranged downstream of the at least one mechanical pressing device in the conveying direction, so that at least the oil content of the pressed material can be detected after pressing with the aid of the at least one mechanical pressing device.

[0058] In an advantageous embodiment of the invention, the second measuring device comprises at least one NIR-based measuring device.

[0059] In a particularly preferred embodiment of the invention, the second measuring device comprises at least one NIR-based measuring device in NIR online technology.

[0060] A device according to the invention for extracting oil from seed has at least one evaluation and control device with which the measurement signals from the first and / or second measuring device can be evaluated. Based on the measurement data, the at least one evaluation and control device can be used to control the supply of heat to the at least one conditioner, for example by controlling at least one control valve, and / or the speed of the press drive of the at least one mechanical pressing device and / or the amount of extraction agent supplied by the at least one supply device for an extraction agent, for example by controlling at least one gas control valve.

[0061] According to the invention, the evaluation and control unit is designed to continuously record the measured values ​​of the first and / or second measuring device, thus enabling rapid and continuous control of the controlled variables. In an advantageous embodiment of a device according to the invention for extracting oil from seed, it is designed for pre-pressing and post-pressing, with pre-pressing achieving an oil yield of approximately 54% to 59% and post-pressing achieving an oil yield of approximately 87% + / - 3%.

[0062] In summary, a device according to the invention for extracting oil from seed comprises at least the following embodiments: A single-stage or at least a two-stage variant is included, wherein in each stage at least one conditioner and a downstream mechanical pressing device as well as at least one conveying device for conveying the pressed material from the conditioner to the mechanical pressing device are arranged.

[0063] In addition, a variant with moisture control of the pressed material in the conditioner and the associated components according to the above description is included.

[0064] According to the invention, carbon dioxide is used as an extraction agent.

[0065] In addition, all executable combinations resulting from these variants are included, in particular also a variant with two stages, a moisture control of the pressed material in at least one conditioner and a CO2-assisted pressing in at least one of the stages.

[0066] The features of a process according to the invention for obtaining oil from seed disclosed below are part of the invention both individually and in all executable combinations.

[0067] A method according to the invention for extracting oil from seed is characterized in particular in that a continuous measurement and evaluation of at least one of the parameters moisture, fiber content and oil content of the pressed material takes place and that, based thereon, at least the conditioning of the temperature and the moisture of the pressed material takes place continuously on the basis of predetermined target values, at least before the pressed material is fed into a mechanical pressing unit, or that the speed of the press drive is continuously regulated in relation to the fiber content of the pressed material or that the amount of an extraction agent supplied is continuously regulated on the basis of the oil content of the pressed material.

[0068] A process according to the invention for extracting oil from seeds comprises at least the following process steps: 1. Feeding the pressed material (seed or press cake from a previously carried out pressing process) into at least one conditioner 2. Conditioning the pressed material using the conditioner 3. Continuously measuring the moisture and / or fiber content and / or oil content of the pressed material after conditioning 4. Continuously evaluating the measured data using at least one evaluation and control unit 5. Continuously controlling the conditioning to regulate the moisture content of the pressed material to a predetermined target value and / or continuously controlling the speed of the press drive and / or continuously controlling the amount of an extractant added to the pressed material in the pressing chamber of a mechanical pressing device depending on the measured oil content of the pressed material 6. Conveying the conditioned pressed material to the mechanical pressing device 7.Pressing the pressed material using the mechanical pressing device to separate the oil contained from the solid components 8. Use of carbon dioxide as an extraction agent.

[0069] In a preferred embodiment of the method according to the invention, the moisture and / or fiber content and / or oil content of the pressed material is continuously measured using an NIR-based measuring device.

[0070] In a particularly preferred embodiment of the method according to the invention, the continuous measurement of the moisture and / or the fiber content and / or the oil content of the pressed material is carried out using an NIR-based measuring device in NIR online technology.

[0071] During conditioning, the material undergoes thermal treatment, which leads to spontaneous evaporation of the water in the cell structure of the seed, thus reducing surface moisture. Conditioning serves to regulate the material to a specified moisture and temperature. The optimal moisture content in the material ensures high efficiency during subsequent mechanical pressing.

[0072] In one embodiment of the process according to the invention, conditioning is carried out with heat (steam / hot water / condensate), for example in a tube bundle conditioner, a drum conditioner or a heat pan.

[0073] In one embodiment of the invention, the humidity is measured after the conditioner and the heat to be supplied to the conditioner is regulated based on a comparison of the measured values ​​with predetermined target values.

[0074] In two-stage mechanical pressing systems or in a two-stage process according to the invention, the press cake from the pre-press is conditioned again, since optimal moisture in the press cake leads to high efficiency in the second pressing process.

[0075] In one embodiment of the invention, the moisture content of the pressed material is controlled by the controlled supply of hot steam into the conditioner.

[0076] In one embodiment of the invention, the mechanical pressing of the material to be pressed is carried out with the assistance of an extraction agent. For this purpose, an extraction agent is injected into the pressing chamber of at least one pressing device.

[0077] According to the invention, carbon dioxide is used as an extraction agent.

[0078] According to the invention, the amount of extraction agent injected into the press chamber can be regulated using the evaluation and control unit. The oil quantity measured in the seed or press cake (two-stage process) before the press determines the pressure and / or the amount of supercritical carbon dioxide injected into the press as an extraction agent.

[0079] By measuring the oil content upstream of the pressing device (measured value), the flow and / or pressure of the carbon dioxide to be injected is adjusted via a control valve in a preferred embodiment of the method according to the invention.

[0080] In one embodiment of the invention, the NIR-based measuring device is used for continuously measuring the moisture content of the pressed material, for measuring the fiber content of the pressed material and for measuring the oil content of the pressed material.

[0081] In one embodiment of the method according to the invention, the speed of the press drive of the mechanical pressing device is controlled based on the evaluation of the measured values ​​of the fiber content of the pressed material.

[0082] Since the fiber content of the pressed material fluctuates and the fiber content has an influence on the mechanical pressing of the oil from the pressed material, in order to achieve high efficiency during pressing, in an advantageous embodiment of the invention the speed of the press drive is changed when the fiber content of the pressed material changes.

[0083] In one embodiment of the invention, the fiber content of the pressed material is determined before the pressing unit.

[0084] Such speed control is possible with a single-stage as well as with a two- or multi-stage process.

[0085] Continuous measurement of the fiber content and moisture content of the pressed material and the resulting control of the speed and / or moisture content offers the advantage that new control values ​​for the control valves and / or the press speed can be set within a short time interval, allowing increases in oil yield of up to 5%. Continuous control generally significantly reduces fluctuations, resulting in higher oil yields. Furthermore, moisture control leads to optimal use of heat (steam, hot water, condensate), thus enabling energy savings.

[0086] The continuous measurement of the oil content of the pressed material in a method according to the invention offers the advantage in an extraction agent-assisted (in particular carbon dioxide) pressing that new control values ​​for the control valves can be set in a short time interval, so that the amount of extraction agent supplied, in particular supercritical carbon dioxide, is always in an optimal ratio to the amount of oil, so that an increase in the oil yield, a reduction in the fluctuation range of the oil yield and / or a reduction in the extraction agent consumption can be realized.

[0087] With a process according to the invention for extracting oil from seeds, an oil yield of 54% to 59% can be achieved during pre-pressing and 87% + / - 3% during post-pressing.

[0088] In embodiments of the method according to the invention, the following process parameters are also used: A typical pressure range of the extraction agent is defined by the extraction agent being supplied to the material to be pressed in the pressing unit at a pressure of approximately 100 to 200 bar.

[0089] Due to the frictional energy generated by mechanical pressing, a temperature range is usually established such that the extract is pressed after the addition of the extraction agent at a temperature of approximately 40 to 45 degrees Celsius.

[0090] Regarding the pressing pressure, it is intended that a mechanical pressing pressure in the range of 250 bar is generated.

[0091] The use of NIR-based measurement of moisture and / or fiber content and / or oil content, especially NIR online technology, enables continuous monitoring of the aforementioned parameters and rapid adjustment of process parameters to continuously ensure only a small fluctuation range around the specified target values. The wet chemical analysis methods required in the state of the art for regularly recording the relevant measured values ​​are now only needed for calibrating the NIR system during commissioning and for recalibration during operation.

[0092] The figures schematically illustrate exemplary embodiments of the method and device according to the invention. They show: Figure 1: A schematic block diagram of an apparatus according to the invention for extracting oil from seed and Figure 2: A schematic diagram of a method according to the invention for extracting oil from seed.

[0093] Figure 1shows a schematic block diagram of an embodiment of a device according to the invention for extracting oil from seed (1). The device for extracting oil from seed (1) has a conditioner (2) with which the supplied seed or press cake can be conditioned with regard to the moisture content and temperature of the pressed material. For this purpose, the device for extracting oil from seed (1) has a steam control device (3) with which a controlled amount of superheated steam can be supplied to the conditioner (2). The temperature of the vapors escaping from the conditioner (2) can be measured using a temperature sensor (4). The measured data from the temperature sensor (4) can be transmitted to an evaluation and control unit (5) for analysis.

[0094] The conditioner (2) is followed by a conveyor (6) that transports the conditioned pressed material to a mechanical pressing device (11). A first measuring point (7) is located in the area of ​​the conveyor (6), which has measuring devices for measuring the moisture, fiber content, and oil content of the pressed material.

[0095] For this purpose, the first measuring point (7) preferably has at least one NIR-based measuring device, which is particularly preferably designed using NIR online technology.

[0096] In the illustrated embodiment of a device according to the invention for extracting oil from seed (1), a dosing device (10) is arranged in front of the mechanical pressing device (11), with which the amount of pressed material fed into the mechanical pressing device (11) can be regulated.

[0097] The device for extracting oil from seed (1) further comprises a feed device (12) for an extraction agent, with which an extraction agent can be introduced into the pressing chamber of the mechanical pressing device (11). A pressure sensor (8) and a flow sensor (9) for measuring the amount of extraction agent introduced into the pressing chamber are arranged in the area of ​​the feed line of the feed device (12), so that the amount of extraction agent introduced can be regulated with the aid of the evaluation and control unit (5).

[0098] A second measuring point (13) is arranged downstream of the mechanical pressing device (11) in the conveying direction, which has measuring means at least for determining the oil content of the press cake emerging from the mechanical pressing device (11).

[0099] In a preferred embodiment of the invention, the second measuring point (13) has at least one NIR-based measuring device, which is particularly preferably designed using NIR online technology.

[0100] Figure 2 shows a schematic representation of a flow diagram of an exemplary embodiment of a method according to the invention for extracting oil from seeds.

[0101] The seed is first conditioned with regard to temperature and moisture content using hot steam. The conditioned pressed material is conveyed past a first measuring point (7) to a mechanical pressing device (11). At the first measuring point (7), the moisture content, fiber content, and oil content of the pressed material are continuously measured using an NIR-based measuring device that uses NIR online technology. The pressed material is pressed using the mechanical pressing device (11) so that the oil content is separated from the solid components. The crude oil and the press cake emerge from the mechanical pressing device (11). In the area of ​​the emerging press cake, at least the oil content of the press cake is continuously measured using a second measuring point (13). Preferably, an NIR-based measuring device is used, particularly preferably using NIR online technology.

[0102] The continuously recorded measured values ​​regarding the moisture content of the pressed material after conditioning are evaluated and used to continuously control the steam regulation so that the moisture content and temperature of the pressed material after conditioning are as close as possible to the specified target values.

[0103] The continuously recorded measured values ​​regarding the fiber content of the pressed material are evaluated and used to continuously control the speed of the press drive, so that the speed of the press drive is always adjusted to the fiber content of the pressed material.

[0104] The continuously recorded measured values ​​regarding the oil content of the pressed material after conditioning are evaluated and used to continuously control the amount of extraction agent added during pressing, so that an amount of extraction agent adapted to the oil content of the pressed material is always added.

Claims

1. Device for obtaining oil from seeds (1), having at least one conditioner (2) for conditioning the temperature and the moisture of the pressed material, at least one mechanical pressing device (11) and at least one conveying device (6) for conveying the conditioned pressed material from the conditioner (2) to the mechanical pressing device (11), a first measuring device (7) being arranged in the region of the at least one conditioner (2), which is designed to continuously acquire at least one of the parameters moisture, fibre content and / or oil content of the pressed material, characterized in that carbon dioxide is used as the extraction agent and in that the device (1) has at least one evaluation and control unit (5), which is designed to evaluate the measured values acquired at least with the aid of the first measuring device (7), the device (1) having at least one feed device (12) for feeding an extraction agent into the pressing chamber of the at least one mechanical pressing device (11), wherein at least the oil content of the pressed material upstream of the mechanical pressing device (11) can be measured with the aid of the first measuring device (7) and wherein the at least one evaluation and control unit (5) is designed to control the feed device (12), so that the quantity of the extraction agent fed into the pressing chamber can be continuously regulated on the basis of the oil content of the pressed material.

2. Device for obtaining oil from seeds (1) according to claim 1, characterized in that the first measuring device (7) has at least one NIR-based measuring device for continuously measuring at least one of the parameters moisture, fibre content and / or oil content of the pressed material.

3. Device for obtaining oil from seeds (1) according to claim 2, characterized in that the NIR-based measuring device is designed in NIR online technology.

4. Device for obtaining oil from seeds (1) according to claim 1, characterized in that the at least one evaluation and control unit (5) is designed to control the at least one conditioner (2), so that the moisture and the temperature of the pressed material can be continuously regulated with the aid of the conditioner (2).

5. Device for obtaining oil from seeds (1) according to at least one of the preceding claims, characterized in that it has at least two stages for pressing the pressed material, each of the stages having at least one conditioner (2), at least one conveying device (6) and at least one mechanical pressing device (11), the stages being arranged in succession in the conveying direction of the pressed material.

6. Process for obtaining oil from seeds comprising at least the process steps: - Feeding the pressed material into at least one conditioner (2) - Conditioning the pressed material using the conditioner (2) - Continuous measurement of the oil content of the pressed material after conditioning - Continuous evaluation of the measurement data using at least one evaluation and control unit (5) - Continuous control of the quantity of an extraction agent supplied to the pressed material in the pressing chamber of a mechanical pressing device (11) as a function of the measured oil content of the pressed - Conveying the conditioned pressed material to the mechanical pressing device (11) - Pressing the pressed material using the mechanical pressing device (11) to separate the contained oil from the solid components - Use of carbon dioxide as an extraction agent7. Process for obtaining oil from seeds according to claim 6, characterized in that at least one NIR-based measurement is carried out for continuous measurement of the moisture and / or the fibre content and / or the oil content of the pressed material.

8. Process for obtaining oil from seeds according to claim 7, characterized in that an NIR-based measuring device in the NIR online technique is used to carry out the at least one NIR-based measurement.

9. Process for obtaining oil from seeds according to any one of claims 6 to 8, characterized in that the process is formed in at least two stages, wherein the pressed material is conditioned and pre-pressed in a first stage and conditioned and re-pressed in at least a second stage.

10. Process for obtaining oil from seed according to at least one of claims 6 to 8, characterized in that a device for obtaining oil from seed (1) according to one of claims 1 to 6 is used.