Batch Rectifiers & Strippers
Batch rectifier
A Batch Rectifier is a specialized distillation system designed to separate liquid mixtures into high-purity components in batch mode. It consists of a heated still (reboiler) at the bottom, a fractionation column with trays or packing, a condenser at the top, and receivers for collecting different fractions.The process begins by charging the entire batch of feed into the still. Heat is applied to generate vapor, which rises through the column. As the vapor travels upward, it repeatedly condenses and re-vaporizes on each stage, creating multiple vapor-liquid equilibrium stages. This allows lighter, more volatile components to enrich at the top, producing a high-purity distillate, while heavier components remain in the still.Batch rectifiers are highly flexible and ideal for producing multiple fractions from a single batch. They are widely used in pharmaceutical manufacturing, specialty chemicals, essential oils, solvent recovery, and research laboratories. Key advantages include excellent control over product purity, the ability to handle varying feed compositions, and suitability for small to medium production volumes. Modern systems often feature vacuum operation, automated controls, and heat integration to enhance efficiency and reduce energy consumption.
batch stripper
A Batch Stripper is a type of distillation column designed primarily to remove volatile components (lights) from a liquid mixture, producing a purified bottom product (residue). Unlike a batch rectifier, the feed is introduced at the top of the column, and steam or heat is applied from the bottom reboiler. As vapor rises, it strips out the more volatile impurities from the descending liquid.The process works by counter-current contact between rising vapor and falling liquid across trays or packing. Lighter components are carried upward with the vapor and collected as overhead distillate, while the heavier, less volatile components are concentrated in the bottoms. Batch strippers are especially effective when the goal is to purify the bottom product or remove small amounts of volatile impurities.They are commonly used in industries such as pharmaceuticals, specialty chemicals, wastewater treatment, and solvent recovery. Key advantages include simplicity of operation, suitability for heat-sensitive materials, and excellent performance when only a small fraction of volatiles needs removal. Batch strippers offer good flexibility for varying batch sizes and feed compositions. Modern systems often incorporate vacuum operation, advanced temperature control, and energy-efficient designs to minimize thermal degradation and operating costs.