Technical Information

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��������� ��UCARSOL™ AP 804 and UCARSOL AP 806 solvents are two additions to a series ofadvanced-performance gas treating solvents from The Dow Chemical Company.Specifically designed for bulk carbon dioxide (CO2) removal in gas processing to meetpipeline specifications, UCARSOL AP 804 and AP 806 solvents are effective in bothsweet and sour gas streams.

Low heats of reaction combined with the ability to remove both CO2 and H2S allow thegas processor to meet tight sulfur specifications while meeting product gas BTU and CO2

specifications. UCARSOL AP 804 and 806 solvents also provide significant operatingsavings compared to other commonly used solvents.

UCARSOL AP 806 solvent is designed to handle lower pressure gas streams (<300 psia or2.1 MPa) requiring a high degree of CO2 removal whereas UCARSOL AP 804 solvent isdesigned to treat higher pressure gas streams containing moderate levels of CO2. Bothsolvents have better high temperature performance than other commonly availablesolvents.

�!�� ����� �� "��The UCARSOL AP line of solvents offer these important special advantages to gasprocessors:

• Low circulation rates and low energy requirements translate into a lower capitalcost for grass-roots units.

• Significant energy savings — through reduced reboiler duties and lowercirculation rates — minimize operational costs.

• A low foaming tendency coupled with a low solvent vapor pressure minimizesolvent make-up requirements and further reduce operational costs.

• High solvent stability, eliminating the need for reclaiming.• Increased acid gas processing ability within existing facilities — increased unit

capacity without the need to modify process equipment.• Experience from over 50 plants around the world utilizing UCARSOL AP solvent

technology.• Technical support and complete solvent services available to assure on-going

trouble-free operation.• Fully supported by The Dow Chemical Company (Dow), the global leader in

providing gas treating processors with specialized technologies and services.

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������ ���#$$����The results of actual field experience in numerous operating units indicate that solutions ofUCARSOL AP solvents, maintained properly and used as specified, exhibit very lowcorrosion rates

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AP 804 AP 806Average Weight per Gallon at 20°C, lb 8.70 8.70Average Weight per Liter at 20°C, Kg 1.04 1.04 lb per Gallon/t at 20°C 0.00613 0.00626 Kg per Liter/t at 20°C 0.00074 0.00075Coefficient of Thermal Expansion per °C (est) at 20°C 0.00070 0.00071 at 55°C 0.00073 0.00079Boiling Point, °C (°F) at 760 mm Hg 149 (300) 149 (300) at 50 mm Hg 75 (167) 89 (192) at 10 mm Hg 45 (113) 40 (104)Pour Point, °C (°F) -51 (-60) -51 (-60)pH 11.0 11.0Specific Gravity, 20/20°C 1.045 1.045Solubility in Water at 20°C, weight percent 100 100 of Water in at 20°C, weight percent 100 100Flash Point, °C (°F) Pensky-Martens Closed Cup (ASTM D93) None None Cleveland Open Cup (ASTM D92) 132 (270) 132 (270)

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AP 804 AP 806Boiling Point, °C (°F) at 760 mm Hg 103 (218) 103 (218) at 50 mm Hg 42 (107) 42 (107) at 10 mm Hg 15 (60) 15 (60)Freezing Point, °C (°F) -15 (5) -15 (5)pH 10.9 10.9Specific Gravity, 20/20°C 1.0328 1.0367Solubility in Water at 20°C Complete Complete of Water in at 20°C Complete Complete

. ��'�� � �"����� ���Dow is the worldwide leader in providing gas treating processors with specializedtechnologies and services. To aid in both plant design and operation, UCARSOL solventsare supported by advanced computer capabilities, state-of-the-art laboratories and pilotplants, field test equipment, analytical procedures, and an ongoing optimization program.The services Dow provides encompass preliminary assessments, start-up services,continual monitoring, and follow-up services. Included in this total support program aretraining for your people in the field, regular sample testing, and performance evaluation.Because complete customer protection and satisfaction is very important to us, Dow isthere every step of the way — before, during, and after installation.

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Computer CapabilitiesWith information drawn from the actual operating conditions of over 500 plants, Dow hasthe largest formulated solvents database in the industry. Dow’s sophisticated computerprograms provide a powerful tool for process analysis and design, including tray-by-traycalculations. Hydraulic evaluations can be made of existing trayed or packed towers,facilitating a troublefree conversion to UCARSOL solvents.

Field representatives have laptop computers that can be taken into a customer’s plant,making it possible to predict the performance of UCARSOL solvents under actual plantconditions. In addition to its use as an in-field preliminary design tool, the laptop computeris extremely valuable after conversion to make any adjustments necessary to optimize theprocess.

Laboratory and Field TestingDow’s Analytical Services Laboratory performs regular service analyses of customersolvents to ensure good performance of the amine unit, as well as specialized analyses toassist in troublefree operation. Among the routine analyses performed are ionchromatography, atomic absorption, and solution alkalinity. Specialized analyses includegas chromatography/mass spectroscopy, FTIR (Fourier Transform Infra Red), ICP(Inductively Coupled Plasma Spectroscopy), NMR (Nuclear Magnetic ResonanceSpectroscopy), and x-ray fluorescence. Analyses are normally completed and reported tothe customer within a few days. Dow’s written report usually includes a technical serviceinterpretation of the analytical results and their impact on the customer’s operation.

Sample KitsDow offers a unique sample kit. Completely self-contained, the kit provides everythingnecessary — from containers to labels — to obtain lean amine samples, seal them, andsafely ship them for routine analysis.

Other ServicesDow’s engineering expertise is also available to provide information on process andequipment requirements, and Dow’s corrosion group can assist in field inspections or setup corrosion-monitoring programs for customers. Also, Dow trains customer personnelprior to and during conversion and works with them to attain optimum performance.

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*Trademark of The Dow Chemical Company Form No. 170-01394-0704

����������5 ���% !When considering the use of any Dow products in a particular application, you shouldreview Dow’s latest Material Safety Data Sheets and ensure that the use you intend can beaccomplished safely. For Material Safety Data Sheets and other product safetyinformation, contact Dow at the numbers listed below. Before handling any otherproducts mentioned in the text, you should obtain available product safety information andtake necessary steps to ensure safety of use.

No chemical should be used as or in a food, drug, medical device or cosmetic,or in a product or process in which it may contact a food, drug, medical device orcosmetic until the user has determined the suitability and legality of the use. Sincegovernment regulations and use conditions are subject to change, it is the user’sresponsibility to determine that this information is appropriate and suitable under current,applicable laws and regulations.

Dow requests that the customer read, understand, and comply with the informationcontained in this publication and the current Material Safety Data Sheet(s).The customer should furnish the information in this publication to its employees,contractors and customers, or any other users of the product(s), and request that theydo the same.

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����6������$��� � ��In the United States: call toll-free 1-800-447-4369 or 1-800-UCARSOL ����������������

In Canada: call toll-free 1-800-447-4369 �������������� ��� ���������������� In Northern Europe and Scandinavia: call +32 89 51 1022 ���������� �����In Southern and Eastern Europe, Russia, Middle East, Africa, India and Pakistan:

call +49 7227 91 3814 ������������������In the Pacific (except China): call toll-free +800 7776-7776 �����������������������������

In China: call toll-free +10 800 600-0015 �������������������������������In Singapore: call (65) 6830-4651 ������� ��������In Japan: call +81-3-5460-2193 ���������� �������

In South and Latin America: call 55 11 5188 9555 ����� ���� ��������In Mexico: call 01 52 55 5201 4700 �������� � ������

In Other Global Areas: call 1-989-832-1560 ���������������� ���������� � ����� ��5558��5" ���� � �"8���

NOTICE: No freedom from any patent owned by Seller or others is to be inferred. Because use conditions and applicable laws may differ from one location to another andmay change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer’s use and for ensuringthat Customer’s workplace and disposal practices are in compliance with applicable laws and other governmental enactments. Seller assumes no obligation or liability forthe information in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSEARE EXPRESSLY EXCLUDED.

Published July 2004.