Clariant

Contact Section - Catalysts - Clariant
December 21, 2023

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The SULFOMAX® series are high performance catalysts for the production of sulfuric acid. They feature different formulations and innovative shapes, covering all operating conditions in the sulfuric acid process. SulfoMax has a proven track record in sulphuric acid plants. Whether the preferred outcome is to reduce emissions, increase productivity, maximise energy recovery, decrease pressure drop or extend catalyst lifetime, SulfoMax is the product of choice for sulphuric acid production.

Catalyst Types

The physical properties of the catalyst are provided in the following table and a brief description of each catalyst is given below.

	SulfoMax® RR	SulfoMax® HV	SulfoMax® CS	SulfoMax® CV
Characteristics	Wide Range of SO₂ Concentrations and Temperature	High Vanadium	Cesium Promoted	High Vanadium and High Cesium
Shapes	Ribbed Ring	Ribbed Ring	Ribbed Ring	Ribbed Ring
Operating Temperature	420 to 630°C	420 to 600°C	380 to 450°C	370 to 450°C
Use	All Beds	High SO₃ Environments Beds before Intermediate Absorption	Top Layer of Bed 1 or Final Bed	Bed After Interpass Absorber

	SulfoMax® EV	SulfoMax® WRR	SulfoMax® WCV	SulfoMax® G-WRR
Characteristics	Operates at Much Lower Temperatures than Current Catalyst	Wide Range of SO₂ Concentrations and Temperature in wet gas application	Bed After Interpass Absorber in wet gas application	Used as a Dust/Mist guard in wet gas application
Shapes	Ribbed Ring	Ribbed Ring	Ribbed Ring	Ribbed Ring
Operating Temperature	360 to 450°C	420 to 630°C	370 to 450°C	420 to 630°C
Use	Bed After Interpass Absorber	All Beds	Bed After Interpass Absorber/Final Bed	Top Layer of Bed 1

	SulfoMax® GRR
Characteristics	Dust Guard catalyst with low pressure drop
Shapes	Ribbed Ring Plain Rings
Operating Temperature	420 to 630°C
Use	Top Layer of Bed 1


Sulphuric Acid on the Web^TM	Technical Manual	DKL Engineering, Inc.