The present disclosure includes compositions and methods for filtering a liquid, e.g., water. The compositions herein may include a filter aid comprising a filter medium and packaging having at least one water-soluble portion. When the filter aid is introduced into the liquid to be filtered, the water-soluble portion(s) may dissolve or otherwise degrade in order to expose the filter medium to the liquid.

The present disclosure includes compositions and methods for filtering a liquid, e.g., water. The compositions herein may include a filter aid comprising a filter medium and packaging having at least one water-soluble portion. When the filter aid is introduced into the liquid to be filtered, the water-soluble portion(s) may dissolve or otherwise degrade in order to expose the filter medium to the liquid.

A filter for producing a water composition containing silicic acid and hydrogen gas includes a carrier material and a silicon material supported on the carrier material. The filter has a diameter ranging from 50 m to 10 mm. A filter assembly, a filter device, and a water purification system containing the filter are also provided.

A method for treating an aqueous fluid resulting from a fluorine-containing polymer production step, the method comprising: separating the aqueous fluid into a solid component and a filtrate using a filter aid.

A method for treating an aqueous fluid resulting from a fluorine-containing polymer production step, the method comprising: separating the aqueous fluid into a solid component and a filtrate using a filter aid.

The invention relates to a method for regenerating the extractive potential of an organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which a solid hydroxylamine is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The method of the invention is suitable for treatment of degraded oxime metal extractants in various process organic solutions both in aldehyde and ketoxime extractant solutions. The method can also be used to treat a mixture of degraded oxime extractants.

The invention relates to a method for regenerating the extractive potential of an organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which a solid hydroxylamine is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The method of the invention is suitable for treatment of degraded oxime metal extractants in various process organic solutions both in aldehyde and ketoxime extractant solutions. The method can also be used to treat a mixture of degraded oxime extractants.

A production system for manufacturing composite porous solid articles is provided wherein the color of such articles is monitored to confirm that the articles, which are produced by heating and compressing mixtures of poly(vinylidene fluoride) binder powder (such as Kyblock resin from Arkema) and activated carbon powder, are fully cured. Adjustments to the processing conditions are made when a region of the article appears blue (indicative of incomplete curing).

A production system for manufacturing composite porous solid articles is provided wherein the color of such articles is monitored to confirm that the articles, which are produced by heating and compressing mixtures of poly(vinylidene fluoride) binder powder (such as Kyblock resin from Arkema) and activated carbon powder, are fully cured. Adjustments to the processing conditions are made when a region of the article appears blue (indicative of incomplete curing).

An oil absorbent product and a method of removing oil contaminants from a water flow are disclosed, in which the product according to the invention is placed in a filter composition and the saturated product can be regenerated for further use. Uses of the method and the product for the removal of oil contamination from water and for the absorption of oil spills, are also mentioned.