TDS Ucarsol GT-10 Antifoam

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Technical Information

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The Dow Chemical Company has been at the forefront of gas treating technology for the

past 60 years, attaining a leading position in amines, UCARSOL™ solvents, and

specialized technologies, such as SELEXOL™ solvents and the UCARSEP™ amine

reclamation system. The development of new products, technologies, and services are part

of ongoing programs to provide for the current and future needs of the gas treating

industry.

One of the problems Dow has addressed is the foaming occasionally experienced in gastreating systems. These problems are usually the result of contaminants entering or

forming in the system. Improper operating conditions can also cause foaming. The best

cure is to find the cause and eliminate it. However, antifoams can be an effective interim,

or even long-term, cure if elimination of the cause is not possible.

Although antifoams have a wide range of applications in industry, many formulations are

not suitable for gas treating uses, and can actually aggravate the situation. Based on

extensive experience in commercial applications, Dow has developed a series of high-

performance antifoams specifically designed for gas treating uses. UCARSOL GT 10

antifoam, one of the specialized products in this series, provides foam control in amine

treating and glycol dehydration systems as well as in physical solvent applications.

UCARSOL GT 10 antifoam offers these important advantages:

• Provides foam control across a wider spectrum of contaminants

• Greater durability of foam resistance

• Improved foam control at low concentration

• Excellent mass transfer while controlling foam

• Ease of use

UCARSOL GT 10 antifoam is particularly useful in controlling foam conditions caused by

contamination from liquid hydrocarbons, particulates, or surfactants in general. Bothrefinery and natural gas processing facilities often encounter these types of contamination

and should consider the use of UCARSOL GT 10 antifoam in physical solvent

applications and in amine treating and glycol dehydration systems.

A versatile foam control agent, UCARSOL GT 10 antifoam provides these important

advantages:

• Excellent antifoam durability



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• Effective for a broad spectrum of contaminants

• Reduced addition levels for control of severe foaming situations

• Improved product quality and stability for superior foam control

• Quick foam knockdown and rapid restoration of system performance

• Ease of use; easy to disperse with good dilute stability

• Improved overall performance of the system in terms of gas liquid separation and

reduced solvent loss

• Requires only low concentrations for effective foam control (generally 2-20 ppm)

To illustrate how the performance of UCARSOL GT 10 antifoam compares with other

antifoam products, a comparison test was performed using MDEA solvent under

controlled conditions (see Table 1 and Figures 1-4). The MDEA was placed in a 50/50

solution with water and solvent was then added. The solution was placed in a graduated

cylinder equipped with a glass frit sparge tube at a 1085 ml/ml gas rate for 5 minutes.

Antifoam Rating Foam Volume (ml) Break Time1 (sec)

None Severe 195 134

Competitive silicone Moderate 70 15Competitive polyol Moderate 67 16

UCARSOL GT 10 Slight 20 <5

1. Time to open eye of fluid on sample surface after stopping gas flow.



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For answers to technical or support questions, contact your nearest Dow representative at

the numbers listed on the back of this brochure.

On-site plant assistance and quick responses are service benefits that come with the use of

UCARSOL GT-Series antifoams. An Engineering Consultant will provide technical

assistance as to the use level and application procedure.

Dow’s research and development laboratory facility has up-to-date equipment to provide

analytical and foam control troubleshooting capabilities for difficult-to-control systems.

UCARSOL GT 10 antifoam performance is dictated by the activity of the foamant and

system losses.

UCARSOL GT 10 antifoam can be added to the aqueous system before foaming occurs.

In the event of a foaming situation, UCARSOL GT 10 antifoam can be used at moderate

levels as a defoamer to quickly regain system control. It can be injected continuously or

batch-added. If a full-flow carbon filter is present, continuous addition is recommended.For slip stream or no carbon filtration, use either batch or continuous addition.

Generally, concentrations of 2 to 20 ppm UCARSOL GT 10 antifoam are adequate to

control foam in gas treating units. Typical concentrations are shown in Table 2 below.

However, we recommend that you contact Dow for specific recommendations or addition

amounts. With any foaming problem, an attempt should be made to identify and eliminate

the source of the foaming problem. Dow can provide assistance in identifying the cause.



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Concentration

Parts per Million

UCARSOL GT 10 Antifoam (as received)

4 pints in 5,000 gallons = 100


13 ounces in 10,000 gallons = 10


Specific Gravity at 20/20°C 1.00Weight per Gallon at 25°C, lb 8.3769

Flash Point, Pensky-Martens Closed Cup (ASTM D93), °C

(°F)

>101 (>214)

1. The physical property data listed are considered to be typical properties, not specifications.

UCARSOL GT 10 antifoam is stable in storage and has a shelf life of 18 months. It has a

minimum storage temperature of 10°C (50°F) and a maximum storage temperature of

50°C (122°F). To ensure that product quality is maintained, the containers should be kept

tightly sealed. Based on the toxicological, physical, and chemical properties of the

product, only normal precautions common to good manufacturing practice need befollowed in handling and storage.

Average Weight per Gallon at 25°C, lb 8.3769

Vapor Pressure at 20°C, mm Hg <1

Flash Point, Pensky-Martens Closed Cup (ASTM D93), °C (°F) >101 (>214)

Type of Containers and Net Contents, lb

5-gallon tight-head DOT 34, two-piece HDPE pail,

straight sides

44

55-gallon tight-head, DOT 17E steel drum, 22 1/2-

inch diameter

440

DOT Shipping Name None

DOT Hazard Classification NoneDOT Identification No. None

DOT Warning Label Required None

1. Determined on typical commercial material. Containers and net contents subject to changewithout notice.



*Trademark of The Dow Chemical Company Form No. 170-01399-0704

When considering the use of any Dow products in a particular application, you should

review Dow’s latest Material Safety Data Sheets and ensure that the use you intend can be

accomplished safely. For Material Safety Data Sheets and other product safety

information, contact Dow at the numbers listed below. Before handling any other

products mentioned in the text, you should obtain available product safety information and

take 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 or

cosmetic until the user has determined the suitability and legality of the use. Since

government regulations and use conditions are subject to change, it is the user ’s

responsibility 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 information

contained 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 they

do the same.

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

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.

TDS Ucarsol GT-10 Antifoam

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