Introduction to Methyl Isobutyl Carbinol

Methyl Isobutyl Carbinol (MIBC), with the CAS Number 108-11-2, is a versatile organic compound widely used as a frothing agent in mineral flotation and as a solvent in various industrial applications. Known chemically as 4-methyl-2-pentanol, MIBC is valued for its ability to enhance flotation processes and its solvent properties.

Chemical Properties

Methyl Isobutyl Carbinol is a clear, colorless liquid with a mild, pleasant odor. Its key chemical properties include:

  • CAS Number: 108-11-2

  • Molecular Formula: C6H14O

  • Molecular Weight: 102.17 g/mol

  • Boiling Point: Approximately 131–133°C

  • Density: 0.805 g/cm³ at 20°C

  • Solubility: Moderately soluble in water (15 g/L at 20°C), highly soluble in organic solvents like ethanol, ether, and acetone

  • Flash Point: 41°C (closed cup)

  • Appearance: Clear, colorless liquid

    Application

    1. Frothing Agent in Mineral Flotation

    MIBC is widely used as a frother in the froth flotation process for separating valuable minerals, such as copper, lead, zinc, and gold, from ore. Its ability to produce stable, fine bubbles enhances the efficiency of mineral recovery in mining operations.

    2. Solvent in Coatings and Inks

    MIBC serves as a solvent in the formulation of paints, coatings, and printing inks. Its moderate evaporation rate and solvency power make it ideal for achieving uniform finishes and improving coating performance.

    3. Chemical Intermediate

    In chemical synthesis, MIBC is used as an intermediate for producing lubricants, plasticizers, and other specialty chemicals. Its hydroxyl group enables versatile reactions for creating derivatives.

    4. Other Industrial Uses

    MIBC is employed as a solvent in the production of adhesives, hydraulic fluids, and cleaners. It is also used in the extraction of essential oils and as a component in brake fluids.

    Safety and Handling

    Proper handling of Methyl Isobutyl Carbinol (CAS No. 108-11-2) is essential due to its flammability and potential health hazards:

    • Hazards: Flammable liquid (H226) that may cause skin and eye irritation (H315, H319) and respiratory irritation (H335). Harmful if inhaled (H332).

    • Protective Measures: Use personal protective equipment (PPE), including chemical-resistant gloves, safety goggles, and respiratory protection. Handle in a well-ventilated area, away from heat, sparks, and open flames.

    • Storage: Store in a cool, dry, well-ventilated area in tightly sealed containers, away from oxidizing agents and ignition sources. Use explosion-proof equipment.

    • Disposal: Dispose of according to local regulations for hazardous chemicals to prevent environmental contamination.

    Always consult the Material Safety Data Sheet (MSDS) for detailed safety information before handling.

Frequently Asked Questions (FAQs)

What is the primary use of Methyl isobutyl carbinol?

It is mainly used as a frother in mineral flotation processes, optimizing foam stability for efficient ore separation in mining operations.

Is Methyl isobutyl carbinol safe for industrial applications?

It is flammable and irritating, requiring PPE and ventilation, but low in chronic toxicity; safe in controlled environments with adherence to handling protocols.

What is the shelf life of Methyl isobutyl carbinol?

Stored in sealed containers below 25°C away from light and contaminants, it maintains stability for 12-24 months without significant oxidation.

Can Methyl isobutyl carbinol be shipped internationally?

Yes, it is shipped worldwide under UN 1993 regulations, in drums or tankers for quantities from 200 L to bulk, with proper flammability labeling.

How does Methyl isobutyl carbinol compare to pine oil as a frother?

MIBC provides more selective and persistent froth with lower dosage requirements than pine oil, resulting in better mineral recovery and reduced reagent costs.

Is Methyl isobutyl carbinol soluble in water?

It has limited water solubility (16 g/L), making it effective for biphasic systems while fully miscible with alcohols and hydrocarbons.

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