Kaolin

Base Information

• Chemical Name: Kaolin
• CAS No.: 1332-58-7
• Molecular Formula: Al2O3.2SiO2.2H2O
• Molecular Weight: 258.16
• Hs Code.: 25070090
• Mol file: 1332-58-7.mol

Synonyms:Argilla;Kaoline;organically modified;Aluminum silicate hydroxide,Bolus,Hydrated aluminum si;CLAY;metahalloysite;Kaolin clay;Catalpo;Buca;Aluminum silicate hydroxide,Bolus,China clay;Kaolin(superfine);SP-33;BOLUS;REDCLAY;Kaowool;Aluminum silicate hydroxide,Bolus,Hydrated aluminum silicate;

Chemical Property of Kaolin

Chemical Property:

• Appearance/Colour: off-white powder
• Melting Point: 1750 °C
• Refractive Index: 1.6200
• PSA: 114.43000
• Density: 2.6 g/cm³
• LogP: -1.34560
• Storage Temp.: Storage temperature: no restrictions.
• Solubility.: Practically insoluble in diethyl ether, ethanol (95%), water, other organic solvents, cold dilute acids, and solutions of alkali hydroxides.
• Water Solubility.: insoluble H2O, dilute acids and alkali hydroxides [HAW93]

Purity/Quality:

99% ^*data from raw suppliers

Aluminum silicate dihydrate, 98% ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xn
• Hazard Codes: Xn
• Safety Statements: 22-24/25

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Overview: Referred to as the "White Gold" due to its white rock color.; Comprised predominantly of the mineral kaolinite, a hydrated aluminum silicate.; Used in various industrial applications due to its physical and chemical properties.
• Paper Industry: Important application in coating and filling paper to improve smoothness, brightness, glossiness, opacity, and printability.
• Paint Industry: Utilized as a significant pigment in paint formulations.
• Ceramics: Used in various ceramic products including dinnerware, sanitaryware, tile, electrical porcelain, pottery, and refractories.
• Rubber and Plastics: Acts as a reinforcing agent and filler in rubber and plastics, improving surface finish, reducing cracking and shrinkage, enhancing thermal stability, and controlling flow properties.
• Inks: Used to improve ink holdout and extend pigments in ink formulations.
• Catalysts: A major component in the manufacture of carriers for catalysts, particularly in catalytic cracking of petroleum.
• Fiberglass: An essential component in fiberglass production, with applications in insulation, reinforcement of plastics, textile yarn, electronic circuit board substrates, paper, cloth, and roofing shingles.
• Cement: Provides alumina and silica in cement production, contributing to whiteness and other properties.
• Geopolymers: Used in the manufacture of geopolymers, with calcined kaolin (metakaolin) being a thermally treated product suitable for this purpose.
• Acidity and Surface Characteristics: The Kaolin surface is acidic but becomes largely neutralized in the presence of water.
• Geological Significance: Kaolin and kaolinitic clays are indicative of near-surface continental environments. Found in various fluvial drainage systems, especially braided-stream systems.
• Portland Cement: Historically used in the production of Portland cement, with kaolin transformed into metakaolin through calcination.
• Synthesis of 纬-Alumina: Metakaolin derived from kaolin can be used to synthesize 纬-alumina powder through chemical processes.

Technology Process of Kaolin

There total 2 articles about Kaolin which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

→ kaolin (1332-58-7) + sodium lignosulphonate

Guidance literature:

Reference yield:

aluminium trichloride (7446-70-0) + phillipsite (K,Na,Ca)(Si,Al)8O16*6H2O#(K,Na,Ca)2(Si,Al)8O16*6H2O → kaolin (1332-58-7) + pyrophyllite

Guidance literature:

In water; High Pressure; phillipsite and an aq. soln. of AlCl3 is encapsulated in a gold bomb, heating to 300°C at a pressure of 30 MPa for 4 weeks, quenching to room temp.; XRD;

DOI:10.1016/0025-5408(87)90126-7

Reference yield:

kaolin (1332-58-7) → aluminum silicate + silica gel (112926-00-8,7631-86-9)

Guidance literature:

In neat (no solvent); byproducts: H2O; heating up to 1050°C; XRD;

upstream raw materials:

aluminium trichloride

Downstream raw materials:

Al0.2N1.8O1.2Si1.8, low temperature

silica gel

Refernces

• 1、 -. "N-Phenylcarbamoyl-pyridine compounds". . . Retrieved 2008/06/13.