5 results about "Aluminum hydrate" patented technology

Processes for preparing high-purity aluminum oxide include providing an aluminum feedstock, reacting the aluminum feedstock with one or more acids to form a hydrated aluminum salt solution, and calcining the hydrated aluminum salt to form an aluminum oxide powder. Other processes for preparing high-purity aluminum oxide include providing an aluminum feedstock and reacting it with one or more acids to form a first hydrated aluminum salt solution, precipitating hydrated aluminum salt from the first hydrated aluminum salt solution to produce a mixture of precipitated hydrated aluminum salt crystals and a mother liquor, separating precipitated hydrated aluminum salt crystals from the mother liquor, dissolving the hydrated aluminum salt crystals in a solvent to form a second hydrated aluminum salt solution, and calcining hydrated aluminum salt of the second hydrated aluminum salt solution to form an aluminum oxide powder. Also described herein are various furnaces for preparing high-purity aluminum oxide.

The present invention relates to a thermoplastic coating for medium-voltage cables, specifically designed to improve both their sliding properties and fire resistance. This innovative coating solution addresses the technical problem of fire spread in the event of ignition near or on the cable, while minimizing the time and effort required for cable installation. The invention utilizes a unique formulation of PVC compounds, incorporating non-halogenated alkyl aryl flame-retardant plasticizers, along with a combination of flame retardants such as magnesium hydroxide (MDH), aluminum trihydrate (ATH), and sepiolite-based flame retardants. Additionally, high-energy light stabilizers (HALS) are included to protect the cable from degradation over time. The overall result is a coating that provides effective fire resistance, reduces friction, and significantly simplifies installation. The system works by preventing the spread of fire and ensuring that cables can be easily inserted into electrical conduits, even in challenging environments.

The present invention relates to a thermoplastic coating for medium-voltage cables, specifically designed to improve both their sliding properties and fire resistance. This innovative coating solution addresses the technical problem of fire spread in the event of ignition near or on the cable, while minimizing the time and effort required for cable installation. The invention utilizes a unique formulation of PVC compounds, incorporating non-halogenated alkyl aryl flame-retardant plasticizers, along with a combination of flame retardants such as magnesium hydroxide (MDH), aluminum trihydrate (ATH), and sepiolite-based flame retardants. Additionally, high-energy light stabilizers (HALS) are included to protect the cable from degradation over time. The overall result is a coating that provides effective fire resistance, reduces friction, and significantly simplifies installation. The system works by preventing the spread of fire and ensuring that cables can be easily inserted into electrical conduits, even in challenging environments.

The present application relates to the field of catalyst, especially to a MOFs catalyst and its preparation method and application.The method comprises: taking an aluminum-based MOF as a carrier, loading noble metal through an impregnation reduction method, and then performing gas phase reduction; wherein the aluminum-based MOF is synthesized by a hydrothermal method with a precursor and an organic ligand as raw materials, the metal precursor is an aluminum salt or a hydrated aluminum salt, and the organic ligand is selected from one or more of square acid, terephthalic acid, 2-fluoroterephthalic acid, diphenic acid, bipyridine, bipyridine dicarboxylic acid, trimesic acid, pyromellitic acid, and mellitic acid; the noble metal includes a Pd salt.The present application can prepare stable aluminum-based MOFs, obtain a strong interaction catalyst of noble metal and aluminum-based MOFs, the MOFs catalyst has stable properties, excellent performance, good morphology, high activity, and good selectivity for double bonds, and the MOFs catalyst can be recovered by centrifugation and reused multiple times.

A method for producing alumina from bauxite pre-processed by a process including calcination (2020) and leaching (2030), wherein the pre-processed bauxite is characterized by a loss on ignition of less than 2.5% by mass, the method comprising the steps of: (a) processing the pre-processed bauxite with an aqueous sodium hydroxide solution at a temperature of at least 100°C (2120), wherein the concentration of the aqueous sodium hydroxide solution is between 100 g Na2O / L and 220 g Na2O / L, preferably between 140 g Na2O / L and 200 g Na2O / L, more preferably between 155 g Na2O / L and 190 g Na2O / L, and even more preferably between 160 g Na2O / L and 180 g Na2O / L. (a) Na2O / L; (b) Separating the solid residue from the liquid phase (2130); (c) Crystallizing aluminum trihydrate by adding seed crystals (2170) (2160); (d) Separating the crystallized aluminum trihydrate from the liquid phase (2180); (e) Calcincing the aluminum trihydrate obtained in step (d) (2194) to obtain alumina (2196).