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Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

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Sulphuric Acid on the Web

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Handbook of Sulphuric Acid Manufacturing
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Sulphuric Acid Decolourization
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Process Engineering Data Sheets - PEDS
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Bibliography of Sulphuric Acid Technology
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Sulphuric Acid Plant Specifications

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This page last updated March 25, 2024

Acid Concentration

Company General Description Website/e-mail
Institute of Nuclear Chemistry and Technology (Poland) Sulphuric acid concentration (MSK-6) www.ichtj.waw.pl/ichtj/market/
Anton Paar leads the way as the premier solution provider for both laboratory and inline measurements for the sulfuric acid industry. Covering the entire sulfuric acid concentration spectrum, from 0 to 100%, and oleum up to 65%, Anton Paar's comprehensive portfolio includes inline sensors for continuous process monitoring, handheld density meters for real-time measurements at the production line, as well as the most accurate density and sound velocity meters for laboratory use.

With more than 40 years of experience in process density measurement and more than 35 years of expertise in inline sound velocity measurement. Our own developed inline density meter L-Dens 7400, the durable and precise inline sound velocity meter L-Sonic 5100 as well as our unique density-sound velocity combined L-Com 5500 concentration meter allow a 24/7 inline monitoring of H2SO4 from 0% to 110%. Due to the genius combination of sound velocity and density, no reversal points for 90% to 110% H2SO4 occur which make it the best possible combination for sulfuric acid and oleum plants. All our sensors are maintenance free, come as a “plug and measure” system and measure with an outstanding accuracy up to ± 0.02 wt%.

With wetted parts such as Tantalum, Hastelloy, 24k Gold or Rhodium Anton Paar offers a well proven sulfuric acid concentration determination portfolio for inline and laboratory measurement. With subsidiaries on all continents and our own local sales and service specialists, Anton Paar is the leading expert in liquid analyzing.
Our laboratory solutions as well as inline H2SO4 meters are used in sulfuric acid plants all over the world. We can provide references in all major technology packages such as Elessent’s MECS®, DuPont Double Contact Double Absorption technology or Worley’s Chemetics® technology as well as many more.

The DSA 5000 lab density and sound velocity meter exemplify efficiency, offering the fastest method to measure sulfuric acid across the entire range without the need for reagents, providing a singular instrument for the entire production process.
Electron Machine Corporation The MPR E-Scan is well suited for measuring the strength of Sulphuric Acid. The sensing head is custom built for this application with either Hastelloy C or Alloy 20 wetted parts www.electronmachine.com
EMCO Controls Sulphuric acid concentration www.emcocontrols.com
Flexim Clamp-on ultrasonic instruments for flow and concentration measurement www.flexim.com

K-Patents is a global supplier of in-line process refractometers for concentration measurement of sulfuric acid (H2SO4). The measurement determines refractive index and temperature and provides temperature compensated sulfuric acid concentration as % or g/l.  We also provide oleum (SO3 in H2SO4) measurements for sulfuric acid plants and users. The process refractometer sensors are factory calibrated and can be used for measurement ranges of 0-85%, 85-100% sulfuric acid and oleum.

Mesa Labs Sound velocity meter for measuring sulphuric acid concentration www.mesalabs.com/nusonics/nusmain.shtml
Valmet Automation Sulphuric Acid Analyzer www.valmet.com/concentration
Inline determination of sulphuric acid and oleum concentrations, measuring both temperature and sonic velocity inline for precise concentration levels. With sonic velocity there is not an inflection point between 90-100 % concentration; and our LiquiSonic® sensors are plug and play, maintenenace free, without drift or adjustments needed, achieving accuracies of 0.05 %wt in concentration measurements.For 20 years SensoTech has been focused on the development, production, sales and support of high-performance inline analyzers for concentration, density, or the monitoring of complex chemical reactions in process liquids. During this time, SensoTech has an overall installation base of the LiquiSonic® analyzers worldwide, e.g. with DOW, BASF, Dupont, and Bayer, and has an office in the USA as well as sales representatives worlwide. SensoTech products offer optimized and cost saving solutions for virtually every kind of application and process in liquids. www.sensotech.com

Gas Analyzers

Company General Description Website/e-mail
ABB Automation GmbH ABB's capabilities embraces one of the largest laboratory, at-line and process analyzer portfolios in the world, performing real-time analysis of the chemical composition and/or physical properties of a process sample or stream.  ABB's advanced solutions combine analyzers, Advanced Process Control, process and application knowledge to improve process performance, productivity, capacity and safety of our customers processes. www.abb.com/analytical
AMETEK, Inc. Photometric analyzers for gas analysis in sulphur recovery unit operations. www.ametekpi.com
Baldwin Environmental, Inc.  Sample conditoners, stack analyzers, oxygen analyzers www.bei-reno.com
OPSIS (Sweden) Emission monitoring equipment for SO2, SO3, Hg and H2O, in the stack or environment www.opsis.se
Marathon Monitors Inc. Oxygen analyzers for acid regeneration applications www.marathonmonitors.com
SICK analyzers and analysis solutions monitor and check emission limit values, contaminant emissions and the release of other substances into the environment. Typical applications are power stations, waste incineration plants, pulp factories, cement plants, and the chemical industry.
Within sulfuric acid plants the analysis of SO2 and O2 at the inlet of the converter as well as SO2, SO3 or H2SO4 at the stack are common applications.

Dew Point

Company General Description Website/e-mail
Acid dew point meter www.BreenES.com
Land Ametek Acid dew point meter www.landinst.com


Company General Description Website/e-mail
Flexim Clamp-on ultrasonic instruments for flow and concentration measurement www.flexim.com
ge_logo.gif (2475 bytes) Coriolis and ultrasonic flowmeter for liquid or gas www.ge-mcs.com
Micro Motion  Coriolis flow meters www.frco.com/micromotion

Acid Mist/SO3

Company General Description Website/e-mail
Sigrist-Photometer AG  Scattering of light is by condensed acid mist is usd to measure acid mist content.  Sample is cooled to 120°C at which acid mist will condense by water will still be as a vapour. www.photometer.com/en/abc/abc_098.htm
Pentol-Enviro AG SO3 or H2SO4 is absorbed into a solution of propan-2-ol and reacts with barum chloranilate.  Chloranilate ions are measured to determine SO3 concentration www.pentol.net
Ankersmid B.V. The SO3 or H2SO4 in the gas sample is absorbed as sulphate ions (SO42-) in an aqueous solution of propan-2-ol in water. The solution is passed through a bed of barium chloranilate.
The acid chloranilate ions are measured in a continuous flow photometer. By maintaining a constant ratio of flow rates for the gas and the propan-2-ol absorbing solution, the concentration of acid chloranilate ions can be directly related to the sulphate ion concentration in the absorbing solution, and hence the SO3 concentration in the gas.