Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.

Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.

Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.

Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.

Abstract: A module insert includes at least one water level sensor, at least one valve and at least one flow channel for the water. The module insert has at least one container having sorbent mechanism for collecting contaminants from the separated water. A pressure-resistant housing is configured to protect an interior of the module insert from the pressure of the fuel.

Abstract: A urea filter material may have a base layer, a cover layer and a filter layer arranged between the base layer and the cover layer, wherein all of the layers are formed from polypropylene non-woven fabric.

Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.

Abstract: A fuel filter having a filter housing including at least one filter element. A water collection chamber configured to collect water separated out of the fuel. An active carbon filter is disposed downstream of the water collection chamber and a water-soluble dividing device is disposed between the water collection chamber and the active carbon filter and is impermeable or insoluble to fuel.

Abstract: A module insert includes at least one water level sensor, at least one valve, at least one flow channel for water, and at least one reservoir with a sorbent mechanism. The sorbent mechanism is configured to absorb impurities from the separated water and is disposed in the reservoir. The sorbent mechanism is further configured to extend a dwell time of the separated water in the module insert.

Abstract: A fuel filter having a filter housing including at least one filter element. A water collection chamber configured to collect water separated out of the fuel. An active carbon filter is disposed downstream of the water collection chamber and a water-soluble dividing device is disposed between the water collection chamber and the active carbon filter and is impermeable or insoluble to fuel.

Abstract: A filter device having a liquid inlet, a liquid outlet, a filter housing, and at least one filter element. At least one water collection chamber is configured to collect water separated out of the fuel. A mechanism for suppressing biological activity is disposed in at least the water collection chamber.

Abstract: The invention relates to a fuel filter (1) with a filter element (2) for separating particles and water out of a fuel flow flowing through the fuel filter (1), a collecting space (6) for collecting the separated water (7), and a dewatering device (3) for discharging the separated water (7) out of the fuel filter (1). Here, it is essential to the invention that the dewatering device (3) has a hydrocarbon adsorber (9) for adsorbing hydrocarbon components which are entrained in the separated water (7).

Abstract: The invention relates to a method for producing a filter medium for technical applications. According to said method, a bellows made of a filter paper is impregnated with a resin, and the resin-impregnated bellows is then radiation-cured. The invention also relates to a filter medium for technical applications, which is provided with a radiation-cured resin layer.

Abstract: A process for producing a pulp from cellulose-containing material, wherein the material is reacted with formic acid as the solvent, and cooked at approximately the boiling temperature of the solvent, whereby return condensation is used. Annual plants, deciduous or coniferous wood can be used as the cellulose-containing material. In one variant of the process, the cellulose-containing material is only slightly warmed, whereby backflow cooling is used, and then a precisely predetermined quantity of hydrogen peroxide is slowly added to the liquid at a constant rate. This process variant can be repeated at a lower cooking temperature. The pulp thus obtained is preferably utilized in the production of cellulose, and in particular in the production of paper or cardboard. It is proposed that the lignin, which is isolated from the cellulose-containing material, have further applications, whereby such lignin is, after the pulp has been separated from the solvent, itself precipitated out in water.