Factors for Ensuring Proper Quality

Process and equipment designs should be such that there is minimum possibility of side reactions/formation of by-products (since these can spoil the quality) it shall be easy to separate out unreacted materials or the by-products. 

Use of oleums for sulphonation can produce spent sulphuric acid as by-product, 

There shall be no idle pockets/crevices in the equipment where material from previous batch can remain stagnant and contaminate next batch. 

Provide air filters at inlets of blowers to remove moisture and dust from air streams to be used for aeration process or for the reaction section where intermediates are being manufactured for supply to pharmaceutical industries. 

These filters minimise corrosion and erosion of impellers or other internals. The dust is also prevented from entering downstream units as it can spoil the products. 

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