摘要:
Material composed of a polyazacycloalkane grafted on polypropylene fibres.Process for the preparation of this material.Process for removing metal cations present in a liquid by bringing this liquid into contact with the said material.
摘要:
Material composed of a polyazacycloalkane grafted on polypropylene fibres.Process for the preparation of this material.Process for removing metal cations present in a liquid by bringing this liquid into contact with the said material.
摘要:
The present invention relates to a material notably adapted for the extraction of metal cations in an aqueous medium, comprising a solid support on which are attached polyazacycloalkane compounds having a ring including at least 4 nitrogen atoms, and wherein the nitrogen atoms of the ring are substituted with coordinating groups, which each are independently: a coordinating group of formula: —(CH2)n—C(═O)—NR1R2 or else a both coordinating and binding group, fitting the formula: —(CH2)p—C(═O)—NR3-(A)-[support]. The invention also relates to methods for preparing the aforementioned materials and to different uses thereof, notably for the extraction of Pb2+ cations in an aqueous medium.
摘要:
The present invention relates to a material notably adapted for the extraction of metal cations in an aqueous medium, comprising a solid support on which are attached polyazacycloalkane compounds having a ring including at least 4 nitrogen atoms, and wherein the nitrogen atoms of the ring are substituted with coordinating groups, which each are independently: a coordinating group of formula: —(CH2)n—C(═O)—NR1R2 or else a both coordinating and binding group, fitting the formula: —(CH2)p—C(═O)—NR3-(A)-[support]. The invention also relates to methods for preparing the aforementioned materials and to different uses thereof, notably for the extraction of Pb2+ cations in an aqueous medium.
摘要:
The strip casting plant has a casting nozzle (10) displaceable in the direction of flow (F) of the liquid metal and adjustable perpendicular to this, to supply liquid metal to the adjustable roller gap (30) between rotating dies (26, 28). The casting nozzle (10) consists of an upper and a lower nozzle element (14, 16) and in vertical strip casting plants a left and a right nozzle element (14, 16) mounted on a melt distribution trough, and two side limiters which form a slot-like outlet opening (20) for the liquid metal. One or both of the nozzle elements (14, 16) is adjustable at least in the area of the outlet opening (20). On operation of the strip casting plant, the casting nozzle (10) is advanced at the start with outlet opening (20) in start position (S) and then withdrawn to work position (W), where the outlet opening (20) is expanded under adaptation to the casting rollers (26, 28).
摘要:
A roll support for use in transporting a support beam along a track having two opposed surfaces. Such roll support is particularly useful for transporting a support beam in a continuous block caster for casting metal. The invention can include mechanisms for adjusting the support beam on the roll support, devices for driving the support beam along the track and apparatus for meshing the roll support with the devices for driving.
摘要:
The present invention provides novel methods and apparatus for continuously casting molten metal in a block caster. In accordance with the present invention, novel track and drive systems are provided for reducing imperfections that can be created in a cast by movement of a beam chain through a casting cycle.
摘要:
The present invention provides novel methods and apparatus for continuously casting molten metal in a block caster. In accordance with the present invention, novel track and drive systems are provided for reducing imperfections that can be created in a cast by movement of a beam chain through a casting cycle.
摘要:
The present invention provides novel methods and apparatus for continuously casting molten metal in a block caster. In accordance with the present invention, novel track and drive systems are provided for reducing imperfections that can be created in a cast by movement of a beam chain through a casting cycle.
摘要:
The present invention provides novel apparatus for continuously casting molten metal in a block caster. In accordance with the present invention, a prestressed beam chain is provided for reducing imperfections that can be created in a cast.