Oil & gas sector chemicals – downstream

Refinechem Products for oil & gas sector

This range of products for the oil & gas sector have been developed using our extensive experience in chemical formulations which and is fully supported by our dedicated technical support team. These chemicals offer a broad range of solutions to our customers in the downstream sector of the oil and gas industry.

To help you identify exactly which product meets your specific requirements we have categorised products according to three specific applications:-

1. process refinery applications

2. gas sweetening amine plant applications

3. finished products applications

However, we do recognise that these divisions are to some degree arbitrary and that many of the products are applicable to more than one of the sectors.


oil & gas sector

Emulsion breakers

Emulsion breakers (or demulsifiers) are frequently used to break down oil-water emulsions allowing the dehydration of crude oil, together with the removal of salts from crude oil. The use of these specific chemicals plays a significant part in reducing the salt concentration of crude oil to <1ptb. The composition of crude oil varies widely from one oilfield to another and low dosage rate SUEZ products can be optimised to suit the specific site conditions

Anti foulants (anti-oxidants) 

The fouling of process equipment in oil refineries is a significant problem resulting in inefficient operation often seen as reduced flow rates and increased energy consumption. Anti-foulant products are typically used with feedstock containing olefins in distillation towers to prevent the formation of “gums” which can result from free radical polymerisation, initiated or accelerated by low concentrations of oxygen.  Anti-oxidants can both stop the initiation of polymerisation by oxygen and terminate the free radical chain reactions involved in the polymerisation process.  SUEZ have various anti-oxidant products.

Amine plant applications

Amine plants use aqueous solutions of amines to remove hydrogen sulphide and carbon dioxide from gases.  Amine plants can also remove acid gases from liquid hydrocarbons such as Liquefied Petroleum Gas (LPG).  SUEZ have products specifically formulated for this application.

Oxygen scavengers

Oxygen contamination in the amine plant can lead to degradation of MDEA to products including bicine which has been linked to corrosion. SUEZ  have products comprising oxygen scavengers to combat this issue. Oxygen scavengers may also promote the reduction of Fe(OH)2 or Fe2O3 to the more corrosion resistant magnetite Fe3O4.  

Neutralising corrosion inhibitors 

Neutralisers are used to control the pH in amine plants; they neutralise the pH drop caused by hydrogen sulphide and carbon dioxide. We have products based on blends of neutralising amines which work at low dosage, with optimum basic strength and minimum salt formation.

Film forming corrosion inhibitors

Amine absorption towers are at risk from carbon dioxide and hydrogen sulphide corrosion. We have a number of film forming corrosion inhibitors which are effective at low doses and over a wide pH range.

Finished products applications

The main end products from oil refineries include diesel, heating oil, jet fuel, gasoline, lubes, gasoline, Kerosene, LPG, etc. Additives are often required to; give storage stability, for corrosion inhibition and to improve the lubricity and cold flow properties. These properties are enhanced by varying chemical means using different types of additives, many of which are outlined below.

H2S Scavengers

Hydrogen sulphide is a serious concern due to its toxic and corrosive nature.  Various formulations to scavenge hydrogen sulphide from refinery finished products are available from SUEZ.

Mercaptan Removers

Although not as acidic and reactive as hydrogen sulphide, mercaptans will still cause problems if not removed. Typical hydrogen sulphide scavengers are not particularly effective at removing mercaptans from hydrocarbons. SUEZ have products which are formulated specifically for mercaptan removal.

Lubricity Improver  

Lubricity improvers for diesel and other refinery finished products are often required as low fuel lubricity can lead to pump wear.  Their use is particularly important with the move to low sulphur diesel.  SUEZ have products designed to improve the lubricity of diesel and other refinery finished products which are effective at low doses.

CFPP (Cold Flow Plug Point) Improver    

The cold flow plug point (a test giving the lowest temperature at which a given volume of fuel passes through a filter in a certain time) can be improved by the use of additives which improve the performance of diesel at low temperatures.  SUEZ have products (mainly polymeric) designed to improve the CFPP of diesel which are effective at low doses and with minimum side effects.

Pour Point Depressants    

The pour point of a liquid is a test that provides the lowest temperature at which the liquid will pour (under set conditions). It is often indicative of the amount of wax in oil as wax tends to separate out at low temperatures thereby inhibiting the flow. Pour point depressants are used in low temperatures to prevent the agglomeration of wax crystals thereby improving the flow characteristics at low temperatures indicated by both a decrease in pour point and improved cold flow plug point.  SUEZ have products based on a family of polymers developed to decrease the pour point of diesel and lubricants and improve cold flow plug point which are effective at low dosage rates.

Wax Dispersant   

Wax dispersants reduce the amount of wax deposits by either altering the surface chemistry of the pipeline or of the wax thereby reducing the tendency of the wax crystals to agglomerate and/ or adhere to the pipeline surface. This results in better process efficiencies with improved flow characteristics and pump-ability.

Antistatic products  

The viscosity of distillate fuels tends to increase during hydro-processing resulting in greater friction and consequently the tendency for static to build up, a potential flammability/explosive risk. SUEZ have antistatic products which are designed to lessen this risk. They reduce the accumulation of electrostatic charges generated during mixing, transfer and shipment of all types of fuels. They are used to increase the conductivity of fuels/reduces the accumulation of electrostatic charges generated during mixing, transfer and shipment of all types of fuels. They are used to increase the conductivity of fuels.


Anti-oxidant products inhibit the free radical polymerisation which can lead to gum formation. Specific anti-oxidant products are available which have been formulated to inhibit oxidation and gum formation in diesel, gasoline and bio-blends. In all cases the products are designed to work at low dosage, to be effective at high temperature and not to contaminate the final product.


Moisture in fuels will lead to the formation of an emulsion.  Dehazers are used to prevent the formation of emulsions in fuels whereas demulsifiers break down any emulsions which have formed. SUEZ have a range of products which are fuel specific.


Microbiological activity can quickly lead to significant problems including corrosion, blockages due to biofilm formation and fuel degradation.  SUEZ have a wide range of fuel and water soluble biocides to meet specific requirements.

We offer one of the largest ranges of products, custom engineered systems, chemicals, training and support services available from a single source.

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