Plastic recycling ,plastic and the uses of it in recent years has caused major concerns for environmentalists and the inhabitants of the earth, have led to a widespread demand for recycling used plastic products into new, usable consumer goods.
Plastics and petroleum product
Plastics are a petroleum product, and concerns about oil conservation have also led to a While there are few industry standards.
Plastic recycling step
A typical recycling business collects used plastic products, and then sorts them according to the type and color of the plastic.
The sorted plastics are then shredded by some means into small plastic chips or flakes. These chips must then be cleaned to remove any dirt, oil, food particles, labels, glue, or other contaminants which may be present. The clean chips are then usually pelletized, or somehow organized in a usable form for a plastic manufacturer. demand to recycle post-consumer plastic rather than meeting demand with new plastic products.
Why used caustic soda in recycling plastic?
A typical cleaning solution includes a surfactant suitable for cleaning plastic such as caustic soda which raises the alkalinity of the solution and aids in the removal of any labels and glue which may have been attached to the plastic.
Streams of liquid surfactant and liquid caustic soda are added separately to the wash water of a recycling system. The desired concentrations of surfactant and caustic are determined experimentally, and the flow rates of the two streams are set to maintain those concentrations in the wash water.
The wash water is periodically monitored to determine the alkalinity and the concentration of surfactant. If necessary, the flow rates of either the liquid surfactant or liquid caustic can be adjusted to change the concentration of either component.