1318-23-6

Basic information

• Product Name: BOEHMITE
• Synonyms: BOEHMITE;ALPHA-ALUMINA MONOHYDRATE;Boehmite (Al(OH)O)
• CAS NO: 1318-23-6
• Molecular Formula: AlHO2
• Molecular Weight: 59.99
• EINECS: 215-284-3
• Mol File: 1318-23-6.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 100°C at 760 mmHg
• Appearance: /
• Density: 3.070
• Vapor Pressure: 24.5mmHg at 25°C
• Water Solubility: insoluble H2O; soluble hot acids, hot alkalies [CRC10]
• CAS DataBase Reference: BOEHMITE(CAS DataBase Reference)
• NIST Chemistry Reference: BOEHMITE(1318-23-6)
• EPA Substance Registry System: BOEHMITE(1318-23-6)

Safety Data

• Hazardous Substances Data: 1318-23-6(Hazardous Substances Data)

Usage

Description

Boehmite (γ-AlOOH), one of the two polymorphs of aluminum oxyhydroxide (the other one is diaspore, α-AlOOH), is a material useful in several commercial applications, for example, ceramics, abrasive materials, fire-retardants, adsorbents, catalysts and fillers for polymeric composites. It can also be used as raw material for producing transition aluminas (mainly γ -Al2 O3 ) with a large range of applications in catalysis and adsorption, and α-Al2 O3 for the production of ceramic materials (used in a broad range of applications, for instance mechanical parts, refractory materials and electric insulators) .Synthesis and Characterization of Boehmites Obtained from Gibbsite in Presence of Different Environments

Chemical Properties

white; ortho-rhomb; a=0.286 nm, b=1.2227nm, c=0.380nm; hardness is 3.5–4 Mohs; obtained by hydrothermal reaction of hydroxide slurries at 200°C–250°C [KIR78] [ROB67]; solubility data are in [BOU93] and [PHI93]Boehmite is an aluminium oxide hydroxide (γ-AlO(OH)) mineral, a component of the aluminium ore bauxite. It belongs to the orthorhombic system and has a layered structure. In each single structural layer, oxygen ions are arranged in cubic close-packed at the vertices of the octahedron, and aluminum ions are located in the center of the octahedron to form a double-layer structure. , the hydroxide radicals are located on the surface of the layered structure, and the layers are connected by hydrogen bonds.Crystal structure of boehmite

Physical properties

The most important aluminous minerals in bauxite are gibbsite (Al(OH)3), boehmite (AlO(OH)) and diaspore (AlO(OH)), however gibbsite requires lower digestion temperature to be dissolved (typically ~145oC) as compared to boehmite and diaspore (typically >240 oC), Equation (1 – 2). Accordingly, alumina refineries are usually designed to specifically process one type of bauxite. While boehmitic bauxites are usually processed using ‘high temperature’ digestion conditions (to recover boehmite) in theory a boehmitic bauxite could be processed in a low temperature plant with no or minimal process impact if the boehmite levels were sufficiently low, even though this boehmite content is not dissolved, increasing residue amount to clarification.Al(OH)3 (s) + NaOH (aq) <=>NaAl(OH)4 (aq) (1)AlOOH (s) + H2O (l) + NaOH (aq) <=> NaAl(OH)4 (aq) (2)

Uses

Boehmite is a high-temperature resistant aluminum oxide-hydroxide. The functional filler is used as a carrier material for catalytic converters or as a flame retardant in printed circuit boards. In the growing market of electromobility, boehmite is also finding increasing use.the minerals boehmite (aluminum oxyhydroxide, γ-AlOOH) and gibbsite (aluminum hydroxide, α-Al(OH)3) are abundant natural ores of aluminum, as well as being important raw materials in industrial applications as adsorbents, fire retardants , coatings , catalysts, polishing agents, fillers, and fuel cells. They are important precursors for the synthesis of different alumina products, such as γ-/δ-Al2O3, chiAl2O3, and α-Al2O3, which are widely used in specialized industries including filler, catalysis, glass, ceramics, purification, paint, coating, and metallurgy. Boehmite and gibbsite are also used in sensitive or specialized applications. For example, gibbsite is used as a substrate for treatment of stomach diseases and also serve as a vaccine adjuvant, and boehmite is used as a host material for the light-emitting diodes (LEDs) .

Definition

boehmite: A mineral form of amixed aluminium oxide and hydroxide,AlO.OH. It is named after theGerman scientist J. B?hm.

InChI:InChI=1/Al.H2O.O/h;1H2;/q+3;;-2/p-1

Upstream product

• 1344-28-1 alumina 
• 7446-70-0 aluminium trichloride 
• 1310-73-2 sodium hydroxide 

Downstream Products

• 107984-01-0 mer-tris(quinolin-8-olato)aluminum 
• 107984-01-0 δ-tris(8-hydroxyquinoline)aluminium 

Related news

In situ synthesis of hierarchical cobalt-aluminum layered double hydroxide on BOEHMITE (cas 1318-23-6) surface for efficient removal of arsenate from aqueous solutions: Effects of solution chemistry factors and sorption mechanism08/24/2019

A facile route is reported for the in situ formation of three-dimensionally structured hierarchical Co-Al layered double hydroxide (CoAl-LDH) crystals on a boehmite surface ([email protected]) via the dissolution of boehmite followed by the coprecipitation of Co and Al ions on the boehmite surfa...detailed

Direct conversion of cellulose to 5-hydroxymethylfurfural (HMF) using an efficient and inexpensive BOEHMITE (cas 1318-23-6) catalyst08/23/2019

High efficiency conversion of cellulose to 5-hydroxymethylfurfural (HMF) remains a challenge today. A simple solid acid catalyst Boehmite (γ-AlOOH) with high hydrothermal stability was prepared and used as sole catalyst for the direct conversion of cellulose into HMF in mixed reaction solvents ...detailed

Full paper/MémoireTribromide ion supported on BOEHMITE (cas 1318-23-6) nanoparticles as a reusable catalyst for organic reactions08/22/2019

Boehmite nanoparticles are not air or moisture sensitive; therefore, they were prepared in water at room temperature using inexpensive materials, without inert atmosphere, by a very simple and inexpensive procedure. When the surface of boehmite nanoparticles was modified by N,N,N′,N′-tetraethy...detailed

Modification of BOEHMITE (cas 1318-23-6) nanoparticles with Adenine for the immobilization of Cu(II) as organic–inorganic hybrid nanocatalyst in organic reactions08/21/2019

Boehmite nanoparticles are aluminum oxide hydroxide (γ‐AlOOH) particles, which has large specific surface area (>120 m2 g−1) and can be prepared using an inexpensive procedure in water. Herein, we present an economical, simple, and environmentally friendly route for the preparation of a copper...detailed

Heat capacity and thermodynamic functions of BOEHMITE (cas 1318-23-6) (AlOOH) and silica-doped BOEHMITE (cas 1318-23-6)08/20/2019

Alumina has a variety of technological uses and has been utilized in many fields due to its versatility and abundance. The properties of aluminas, such as pore size, acid site concentration, and the amount of adsorbed water, can be tailored for a specific application using a variety of synthetic...detailed

Transformation behavior of gibbsite to BOEHMITE (cas 1318-23-6) by steam-assisted synthesis08/19/2019

Conversion of gibbsite to boehmite as a precursor for many aluminum oxide materials was widely concerned. Herein, the steam-assisted crystallization (SAC) method was conducted to synthesis the boehmite from gibbsite. The transformation behavior of gibbsite to boehmite treated at 155, 165, 175, a...detailed

Research PaperDevelopment of a stable BOEHMITE (cas 1318-23-6) layer on aluminum surfaces for improved pool boiling heat transfer in water08/18/2019

Oxidation layers that develop on an aluminum surface can cause changes in the surface wettability. When the aluminum surface is used as a heating surface, these changes result in inconsistencies in the nucleate boiling heat transfer performance and critical heat flux (CHF). Data is presented in ...detailed

Nanocrystalline BOEHMITE (cas 1318-23-6) obtained at room temperature08/17/2019

The single phase nanocrystalline boehmite is obtained for the first time at room temperature by a facile hydrolysis of Bayer liquor. Mesoporosity in boehmite powders was constructed using the glucose as a template. As-synthesized boehmite powders have high surface area (above 350 m2/g) and the a...detailed

Original research articleProperties of BOEHMITE (cas 1318-23-6) (γ-AlOOH) and Eu3+-doped BOEHMITE (cas 1318-23-6) synthesized by hydrothermal method08/16/2019

Boehmite nanoplates and Eu3+-doped boehmite nanoplates were synthesized by a facile hydrothermal reaction. And the boehmite nanoparticles behave as plate-like in morphology and have a small size about 59 nm. Those nanoplates could be effectively excited by near-UV light in the range of 360 nm to...detailed

Effect of BOEHMITE (cas 1318-23-6) sol on the performance of alumina microfiltration membranes08/15/2019

Precursor film method was used to prepare highly permeable ceramic microfiltration membranes in this work. The performance of alumina microfiltration membranes was improved by adding boehmite sol in the membrane precursor film. With increasing the boehmite sol content, the effective average pore...detailed

Relevant articles and documents

Studies on the reactions of aluminium oxides and hydroxides

The hydrothermal and decomposition reactions of differently ground gibbsite and its reaction products were studied. The samples were treated isothermally under hydrothermal conditions or in air, and the products were characterized by thermogravimetry and