Turbine Mixer Principal of Turbine Mixer Construction Turbine Mixer Working of Turbine Mixer Uses/Applications of Turbine Mixer Advantage of Turbine Mixer Disadvantage of Turbine Mixer
Double cone Blender Principal of Double cone blender: It is an efficient design for mixing of powder of different densities. It is usually charged and discharged through the same port. These are used mostly for small amounts of powders. The rate of rotation should be optimum depending on the size and shape of the tumbler, … Read more
Mixing Agitation Factor influencing mixing process Mechanism of mixing in Solids In Solid-solid mixing operation four steps are involved Equipment used for solid Mixing- V cone blender, Double cone blender, Ribbon blender, sigma blade mixer etc. Mixing of Liquids Liquid-liquid mixing is considered as a simple operation compared to that of solid-liquid mixing. It involves … Read more
CYCLONE SEPARATOR Principal of Cyclone Separator Construction of Cyclone Separator Working of Cyclone Separator Advantages Disadvantages Low capital cost. High operating costs (due to pressure drop). Ability to operate at high temperatures. Low efficiencies (particularly for small particles). Can handle liquid mists or dry materials. Unable to process “sticky” materials. Uses of Cyclone Separator
Sieving/ SHIFTING Sieve for Pharmaceutical testing are constructed from wire cloth with square meshes woven from wire of brass, bronze, stainless steel or any other suitable material. The wire should be of uniform circular cross- section and should not be coated or plated these should not be any reaction between the material of the sieve … Read more
Definition of Size Separation Objectives of size separation Classification powder according to IP (Indian Pharmacopeia) S. No. Grade of Powder All Particles must pass through Sieve No./Nominal mesh aperture Sieve through which 40% of the particles pass/ Nominal mesh aperture Comparison of powder size 1 Coarse powder 10/(1.70mm) 44/(355µm) 1 2 Moderately coarse powder 22/(710µm) … Read more
Ball Mill Principal of Ball Mill It work on the principle impact and attrition. Construction of Ball Mill Working of Ball Mill In a ball mill, the material to be ground is placed inside a rotating cylinder along with grinding media (usually steel or ceramic balls). The efficiency of size reduction depends heavily on the rotational … Read more
Hammer Mill Principal of Hammer Mill It work on the principle of impact. Construction of Hammer Mill It consists of metal causing inclosing a control shaft to which four or more swinging hammer are attached the lower part of the mill, consists of a screen through which material can pass in a suitable receiver when … Read more
Size Reduction of Drugs Importance of size reduction Factor affecting size reduction Methods of Size Reduction:
Preservatives Definition of Preservatives Types of Preservatives On the basis of mechanism of action it is divided into three categories- Uses/Application of Preservatives