3results about How to "Guaranteed recyclability" patented technology

The invention relates to the field of water treatment and environmental catalysis, in particular to a bimetallic MOF modified loofah sponge derived carbon catalyst and a preparation method thereof. The method comprises the following steps: 1) treating loofah sponge to obtain dried loofah sponge; 2) preparing a precursor solution from a metal salt and an organic ligand; (3) immersing the pretreated loofah sponge into the precursor solution, and carrying out heating reaction for in-situ growth; 4) washing and drying the reacted loofah sponge to obtain a precursor; and 5) performing high-temperature heat treatment on the precursor in a protective atmosphere to obtain the bimetallic MOF modified loofah sponge derived carbon catalyst. The efficient performance of the prepared catalyst is derived from the synergistic effect of multiple functions, the loofah sponge carrier provides structural support and a mass transfer channel, the bimetallic MOF provides an active site and an electron transfer path, and the carbonized shell layer provides stable protection and interface strengthening. Due to the multi-layer synergistic effect, the catalyst can still keep excellent performance under a wide application condition.

The application relates to a preparation method of a magnetic lithium ion sieve coated with Fe-doped ZrO2, and relates to a preparation method of a lithium ion sieve. 3+ The application creatively adopts Fe-doping and ZrO2 coating to prepare the magnetic lithium ion sieve, simultaneously reduces the dissolution loss of manganese and iron by means of metal cation ion doping and coating, realizes efficient solid-liquid separation, greatly increases the service life of the lithium ion sieve, and is applicable to lithium extraction from various lithium-containing solutions due to the acid and alkali resistance of ZrO2. The method comprises the following steps: 1, preparing FO; 2, preparing LMFO; 3, preparing ZrO2@LMFO; and 4, preparing ZrO2@HMFO. The process is simple in preparation, the dissolution loss of manganese and iron tends to be stable in multiple cycles, the magnetic separation performance is good, the process is applicable to mass production, and is helpful to the industrialization progress of lithium extraction from salt lake brine.

The utility model discloses a positioning control frame suitable for H-shaped steel, including longitudinal beam, two the longitudinal beam parallel interval arrangement, and the end part is fixed with a crossbeam respectively, and two longitudinal beams and the two crossbeams of end part constitute the main frame of rectangle together, the middle section fixed with two interval distribution crossbeams of two longitudinal beams, and the longitudinal beam of two adjacent crossbeams and its both sides constitutes the positioning frame of mouth character type together. The utility model connects the positioning frame of longitudinal beam and crossbeam composition integrative, and the construction is convenient, is applicable to general SMW method pile construction, and can be repeatedly used, and effectively guarantees the recycling of material. Can reduce H-shaped steel sinking positioning time, improves construction efficiency, reduces construction cost and shortens the period of construction, and social benefit and economic benefit are outstanding. Can accurately position the position of H-shaped steel quickly, improves the perpendicularity of SMW method, thereby can guarantee engineering construction quality.