Alkylation: Alkylphenols

 

Alkylphenols range generally from C1 to C16 alkyls. Typical alkylates are butylphenol, octylphenol, nonylphenol and dodecylphenol, but there are also a variety of smaller reactions catalysed with polymeric catalysts. The trend today is moving away from BF3 or AlCl3 towards heterogeneous systems. Alkylphenols are produced through a Friedel-Craft reaction.

Alkylphenols can be used as herbicides, lubricants, gasoline additives, antioxidants and non ionic surfactants.

 

CHEMRA has developed a novel catalyst which can withstand temperatures of up to 190°C (375°F) as well as a variety of dry catalysts such as TREVER®|LYST CAT600, TREVER®|LYST CAT610 and TREVER®|LYST CAT630.

 

The choice of catalyst depends very much on the type of alkene. These catalysts can withstand typically temperatures of up to 150°C (300°F).

 

Reaction of olefin with phenol

 

reaction of olefin with phenol

 

The optimization of surface area, pore size, pore size distribution and a very low degree of moisture allows an excellent selectivity paired with a high conversion rate. The physical stability of TREVER®|LYST DRY catalysts allow their usage in stirred tank reactors and a good separation from the reactants.

 

Typical process conditons

 

Influent

Phenol and olefin (alkene)

Temperature

90°C (195°F) – 130°C (265°F)

Conversion per path

can be >99%

Lifetime

depends on the reaction and impurities

Selectivity

depend on the reaction and reaction conditions

 

 

Recommended catalysts1

 

 

1 All catalysts have a very low moisture and excellent mechanical stability

2 For more information about these new catalysts, please contact your CHEMRA sales representative.