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

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Sulphuric Acid Plant Specifications

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Acid Plant Database December 6, 2011

Owner El Dorado Chemical Company
Background Part of the chemical manufacturing division of LSB Industries www.lsb-okc.com

Initial facility built by U.S. Army Corps of Engineers and operated by Lion Oil Company
1949 - Acid plant installed
19?? - Monsanto Company acquires facility
1983 - El Dorado Chemical, Inc. puchases facility from Monsanto Company

Location 4500 North West Avenue
El Dorado, Arkansas
USA  71730
Website www.eldoradochemical.com
Plant -
Coordinates* 33° 15' 59" N, 92° 41' 24" W
Type of Plant Sulphur Burning
Gas Source Elemental Sulphur
Plant Capacity 300 STPD (voluntary limit)
360 STPD allowed if CEM installed - 360 STPD is the original capacity of the plant
(< 131,400 STPA per rolling 12 month total)
Emissions SO2: 600 lb/h, 2520 ton/a
Acid Mist: < 0.5 lb/ton, 7.5 lb/h, 32.9 ton/a
Opacity: 15%

The plant is not subject to 40 CFR 60 Subpart H because it has not been modified after the effective date of the Subpart (August 17, 1971)

SO2: 4.0 lb/ton per ADEQ Consent Administrative Order, LIS 03-175, dated December 31, 2003.  Emission to be achieved by February 10, 2010.

Status Operating
Year Built 1949
Technology Chemico
Contractor -
Remarks El Dorado produces a high purity, virgin sulfuric acid manufactured through the precise burning of premium quality sulfur.  El Dorado offer 3 grades of sulfuric acid: 98%, 66° Baumé (93%), and 93% Low Iron. All grades are certified to NSF® International Standard 60 for controlled use in potable water.  Products are used in pulp digestion, bleaching, water treating, or metal etching, our NSF® certified products are the benchmark of quality for the sulfuric acid industry.
Permits Arkansas Department of Environmental Quality www.adeq.state.ar.us
Facility ID: 70-00040
Permit No. Issue Date Expiry Date Details
0573-A August 8, 1979 - For installation of mist eliminator to reduce acid mist below 0.5 lb/ton
0573-AR-1 September 23, 1983 - All previous permits rescinded
0573-AOP-R4 October 19, 1999 October 18, 2004 -
0573-AOP-R5 April 12, 2005 - -
0573-AOP-R6 April 12, 2005

April 11, 2010


Pictures El Dorado Chemical 1.jpg (174483 bytes)
General -
References -

November 30, 2011 - Jacobs Engineering Group Inc. (NYSE:JEC) announced today its Chemetics® unit in Pickering, Ontario, Canada has been awarded a design and fabrication contract by El Dorado Chemical Company for three proprietary designed sulfuric acid coolers to be installed in the company's acid plant in El Dorado, Ark.  Officials estimate the construction cost to El Dorado to be $700,000, with a Chemetics® contract value estimated at $500,000.  Under the terms of the contract, the scope of work involves the design and fabrication of drying, interpass and final anodically protected sulfuric acid coolers. The coolers are replacing two of the original Chemetics® coolers supplied in 1975 and one from another vendor supplied in 2008, when the plant was upgraded to double absorption. The contract was awarded after close cooperation with the client to custom design the coolers and the associated water piping to meet the present and future process and operational requirements of the plant.  This project is in addition to two other proprietary SARAMET® equipment and piping projects of value estimated at $300,000, signed earlier this year, for the nitric acid portion of the El Dorado facility.  Jacobs Group Vice President Andy Kremer stated, "This project is an excellent example of Jacobs' unique ability to collaborate with our clients to provide high value solutions, and it reinforces us as a leader in design and supply of proprietary equipment for the sulfuric acid production industry."  El Dorado Chemical produces concentrated nitric acid (CNA), sulfuric acid and weak nitric acid at its facility in El Dorado.

MTPD - Metric Tonne per Day           STPD - Short Ton per Day
MTPA - Metric Tonne per Annum      STPA - Short Ton per Annum
SA - Single Absorption
DA - Double Absorption

* Coordinates can be used to locate plant on Google Earth