Solid acids and their use as environmentally

Essay specific features

 

Issue:

Science

 

Written by:

Melissa R

 

Date added:

July 11, 2014

 

Level:

University

 

Grade:

A

 

No of pages / words:

10 / 2651

 

Was viewed:

2451 times

 

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Essay content:

While heterogeneously catalyzed processes are widely used within the petrochemical industry, many fine and specialty chemicals manufacturers rely on homogeneously catalyzed liquid-phase reactions. Many of these processes were developed at the turn of the century, and focused on product yield, disregarding the environmental impact of inorganic waste and toxic by-products formed during the reaction...
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While many of these processes are catalytic, some require (e.g., acylation using AlCl3) stoichiometric amounts of acid. Final isolation of the product necessitates aqueous quenching and neutralization steps to remove the acid, resulting in enormous quantities of hazardous waste, with the cost of disposal of this waste often outweighing the value of the product...
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