The invention refers to a novel man-made multicomponent filament of the polymer fiber with significantly reduced Global Warming Potential (GWP) value and to its manufacturing process. The filament is comprised of at least one core component comprised of a mechanically regenerated thermoplastic polymer waste material originating from post-industrial waste and/or post-consumer waste, and a of at least one sheath component comprised of a virgin or a virgin-equivalent chemically regenerated thermoplastic polymer material. The filament and fiber is produced by a standard bicomponent spinning technology. The GWP value of the core component is at least 30% lower than the GWP value of the sheath component and at least 30% lower than the GWP value of any other standard core component used in the filament or fiber produced from the corresponding materials presently on the market. The low GWP value of the core component used in the filament of the polymer fiber of the invention thus contributes to the low GWP value of the overall fiber. The filament/fiber of the invention is intended for use in apparel, flooring, air bag, parachute, tires, transport belts, medical, and other technical applications.
D01D 5/34 - Structure "âme-gaine"Ensembles de filage à cet effet
D01F 8/06 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins une polyoléfine comme constituant
D01F 8/12 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyamide comme constituant
D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
2.
Process for the purification of caprolactam from a solution of crude caprolactam without organic solvent extraction
The present invention relates to a process for purifying caprolactam from solutions of crude caprolactam by a direct treatment with one or more alkaline compounds of polyvalent metals, preferably bivalent and trivalent, without resorting to organic solvent extraction as used in the usual purification process.
A further subject of the present invention is a facility devoid of a unit for organic solvent extraction and designed to carry out the caprolactam purification process described herein.
C07D 201/06 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann à partir de cétones avec formation d'oxime et réarrangement simultanés
The present invention relates to a process for purifying caprolactam from solutions of crude caprolactam by a direct treatment with one or more alkaline compounds of polyvalent metals, preferably bivalent and trivalent, without resorting to organic solvent extraction as used in the usual purification process. A further subject of the present invention is a facility devoid of a unit for organic solvent extraction and designed to carry out the caprolactam purification process described herein.
C07D 201/06 - Préparation des lactames à partir d'oximes ou en passant par des oximes, par un réarrangement de Beckmann à partir de cétones avec formation d'oxime et réarrangement simultanés
8. This ash is then led to dissolution in the acidic medium and to further steps of the method. The proposed method of the invention improves the method for recycling waste nets, such that not only pure polyamide is obtained from the nets but also elementary copper, which has a double benefit: elementary copper in a sufficiently pure form is a useful raw material, moreover, the quantity of copper in final waste is reduced, consequently a negative impact on the environment is reduced and the cost of waste disposal of the method is reduced as well.
The present invention relates to a process for purifying caprolactam from solutions of crude caprolactam by a direct treatment with one or more alkaline compounds of polyvalent metals, preferably bivalent and trivalent, without resorting to organic solvent extraction as used in the usual purification process. A further subject of the present invention is a facility devoid of a unit for organic solvent extraction and designed to carry out the caprolactam purification process described herein.
An improved process and device for separation and recovery of waste carpet components, wherein waste carpets are predominantly composed of a face fiber material, a backing material and an adhesive coating which includes latex and filler, is disclosed. In the proposed process practically all of the filler, i.e. calcium carbonate, is removed prior to fine grinding and passing the mixture to a high speed centrifuge for separation of the face fiber material from the backing material. In the proposed process the fine grinding of the material to be recycled is done only once right before passing the mixture to the centrifuge by which the loss of the fiber material is highly reduced before its separation into nylon and polypropylene and also the life time of the fine grinder and the centrifuge is prolonged. The material which passes to the centrifuge contains in this step only minimal amounts of the filler. Inorganic filler is hard and abrasive and can, if present in higher amounts, cause faster wear of the fine granulator and the centrifuge. The use of only one centrifuge makes the proposed process also cost effective.
A process for separation and recovery of waste carpet components, wherein waste carpets are predominantly composed of a face fiber material, a backing material and an adhesive coating which includes latex and filler. Virtually all of the filler, i.e. calcium carbonate, is removed prior to fine grinding and passing the mixture to a high speed centrifuge for separation of the face fiber material from the backing material. A high friction washer is disclosed which separates the face giver material, the backing material and the adhesive coating. The fine grinding of the material to be recycled may be done only once before passing the mixture to the centrifuge by which the loss of the fiber material is highly reduced before its separation into face fiber and backing material and also the life time of the fine grinder and the centrifuge can be prolonged.
The invention refers to a method for recovering copper from waste fishing nets. The method of the invention includes washing of nets in a washing liquid, wherein an antifouling coating and other impurities are removed from the surface of the nets to a largest extent possible. The washing liquid is water; NaOH can also be added into the water in order to improve the efficiency of washing, such that the NaOH concentration in the water is up to 20 %. The suspension of the washing liquid, sludge and other impurities, resulting from the washing step, is led to a separation step. The sludge obtained in the separation step is led to the dissolution step in an acidic medium. A strong mineral acid is selected as the acidic medium, such as H2SO4, HNO3, HCl, a mixture of strong mineral acids or a mixture of one or several strong mineral acids with H2O2. Then, the non-dissolved sludge is separated from the solution of copper ions Cu2+ in the acidic medium, the solution of copper ions Cu2+ in the acidic medium is led to electrolysis, wherein elementary copper having a purity of more than 94 % is deposited on the cathode. The non-dissolved residual sludge can be optionally led to thermal treatment to the reactor, where the residual paraffins and co-polymers are removed at a temperature ranging from 500 °C to 900 °C. The remaining ash may contain up to 30 % by weight of copper compounds based on the weight of the ash, particularly in the form of copper(ll) oxide CuO, less in the form of copper(l) oxide Cu2O and copper phosphates Cu(H2PO4)2, Na6Cu9(PO4)8. This ash is then led to dissolution in the acidic medium and to further steps of the method. The proposed method of the invention improves the method for recycling waste nets, such that not only pure polyamide is obtained from the nets but also elementary copper, which has a double benefit: elementary copper in a sufficiently pure form is a useful raw material, moreover, the quantity of copper in final waste is reduced, consequently a negative impact on the environment is reduced and the cost of waste disposal of the method is reduced as well.
The invention refers to a method for recovering copper from waste fishing nets. The method of the invention includes washing of nets in a washing liquid, wherein an antifouling coating and other impurities are removed from the surface of the nets to a largest extent possible. The washing liquid is water; NaOH can also be added into the water in order to improve the efficiency of washing, such that the NaOH concentration in the water is up to 20 %. The suspension of the washing liquid, sludge and other impurities, resulting from the washing step, is led to a separation step. The sludge obtained in the separation step is led to the dissolution step in an acidic medium. A strong mineral acid is selected as the acidic medium, such as H2SO4, HNO3, HCl, a mixture of strong mineral acids or a mixture of one or several strong mineral acids with H2O2. Then, the non-dissolved sludge is separated from the solution of copper ions Cu2+ in the acidic medium, the solution of copper ions Cu2+ in the acidic medium is led to electrolysis, wherein elementary copper having a purity of more than 94 % is deposited on the cathode. The non-dissolved residual sludge can be optionally led to thermal treatment to the reactor, where the residual paraffins and co-polymers are removed at a temperature ranging from 500 °C to 900 °C. The remaining ash may contain up to 30 % by weight of copper compounds based on the weight of the ash, particularly in the form of copper(ll) oxide CuO, less in the form of copper(l) oxide Cu2O and copper phosphates Cu(H2PO4)2, Na6Cu9(PO4)8. This ash is then led to dissolution in the acidic medium and to further steps of the method. The proposed method of the invention improves the method for recycling waste nets, such that not only pure polyamide is obtained from the nets but also elementary copper, which has a double benefit: elementary copper in a sufficiently pure form is a useful raw material, moreover, the quantity of copper in final waste is reduced, consequently a negative impact on the environment is reduced and the cost of waste disposal of the method is reduced as well.
