Petroleum Treating Processes in Oil Refineries

Petroleum Treating Processes in Oil Refineries

Petroleum treating processes are essential operations widely applied across oil refineries, gas processing plants, and petrochemical facilities to remove undesirable impurities from crude oil, natural gas, and intermediate refinery streams.

Petroleum treating processes are essential operations widely applied across oil refineries, gas processing plants, and petrochemical facilities to remove undesirable impurities from crude oil, natural gas, and intermediate refinery streams. The primary objective of petroleum treating is to eliminate contaminants such as sulfur compounds, nitrogen compounds, water, salts, metals, acids, and solid particles in order to protect downstream equipment, improve product quality, and ensure compliance with environmental and product specifications.

The primary objective
of petroleum treating

The primary objective of petroleum treating is to eliminate contaminants such as sulfur compounds, nitrogen compounds, water, salts, metals, acids, and solid particles in order to protect downstream equipment, improve product quality, and ensure compliance with environmental and product specifications.

Petroleum treating
processes

Petroleum treating processes are essential operations widely applied across oil refineries, gas processing plants, and petrochemical facilities to remove undesirable impurities from crude oil, natural gas, and intermediate refinery streams.

Compliance and
product quality

protect downstream equipment, improve product quality, and ensure compliance with environmental and product specifications.

Major Petroleum Treating Processes

Major Petroleum Treating Processes

Treating Process Portfolio

01
Desalting
02
Merox Treating
03
Amine Treating

01

Desalting

Crude oil desalting is one of the first treating steps in refineries, designed to remove inorganic salts, water, and suspended solids from crude oil before atmospheric distillation.

02

Merox Treating

Merox (Mercaptan Oxidation) processes are used to remove mercaptans from LPG, naphtha, and kerosene streams by converting them into disulfides.

03

Amine Treating

Amine treating is applied in both gas and liquid hydrocarbon streams to remove acidic gases.

Desalting
Desalting
Crude Oil Treating
01

Crude oil desalting is one of the first treating steps in refineries, designed to remove inorganic salts, water, and suspended solids from crude oil before atmospheric distillation. Key contaminants removed:

02

Key contaminants removed:

01Sodium, calcium, and magnesium chlorides
02Free and emulsified water
03Sand and rust particles

03

Desalting improves heat exchanger performance, reduces corrosion, and prevents fouling in downstream units.

Merox Treating
Merox
Treating
01

Merox (Mercaptan Oxidation) processes are used to remove mercaptans from LPG, naphtha, and kerosene streams by converting them into disulfides. Key benefits:

02

Key benefits:

01Odor removal
02Improved product stability
03Compliance with product specifications

Amine Treating
Amine
Treating

Amine treating is applied in both gas and liquid hydrocarbon streams to remove acidic gases. The process involves absorption, regeneration, and solvent circulation. Common licensors:

Common licensors:
UOP (Honeywell)
Axens
Shell Global Solutions

Chemicals
Treating
Chemicals
Treating Chemicals
Treating chemicals are applied across desalting, gas sweetening, hydrotreating, and liquid hydrocarbon treating units.
Common chemical categories
Demulsifiers, Corrosion Inhibitors, Antifoaming Agents, Oxygen and H₂S Scavengers, Caustic Soda (NaOH)
Full technical documentation
full technical documentation including MSDS, COA, and handling procedures.

Petroleum treating processes rely on a wide range of specialty and bulk chemicals to remove contaminants, enhance separation efficiency, and protect refinery and gas plant equipment. These chemicals are supplied in standardized industrial packaging formats to ensure safe handling, storage, and continuous plant operation.

Treating Chemicals

Treating chemicals are applied across desalting, gas sweetening, hydrotreating, and liquid hydrocarbon treating units. Common chemical categories include:

Demulsifiers – used in crude oil desalters to break water-in-oil emulsions
Corrosion Inhibitors – protect pipelines, vessels, and heat exchangers
Antifoaming Agents – control foaming in amine and treating columns
Oxygen and H₂S Scavengers – remove trace corrosive gases
Caustic Soda (NaOH) – used in caustic treating and mercaptan removal units

Typical Industrial Packaging

Typical Industrial Packaging including Bulk supply via road tanker or ISO tank, IBC (1,000 L) and Steel drums (200–220 L). OGSCM Group supplies refinery- and gas-plant-approved treating chemicals in all standard industrial packing formats, ensuring safe logistics, consistent quality, and full technical documentation including MSDS, COA, and handling procedures. Petroleum treating chemicals are typically sourced from internationally recognized manufacturers whose products meet refinery licensor and EPC specifications. Leading global brands include:

Leading global brands include:
BASF – amines, formulated solvents, specialty treating chemicals
Dow Chemical – treating chemicals, solvents, additives
Shell Chemicals – solvents and process chemicals
Clariant – demulsifiers, corrosion inhibitors, specialty chemicals
Arkema – amines and specialty solvents
LANXESS – sulfur removal and specialty chemical solutions
Innospec – fuel and refinery treating chemicals
Nalco Water (Ecolab) – corrosion inhibitors, demulsifiers, antifoams

OGSCM Group

OGSCM Group collaborates with approved manufacturers and international suppliers to deliver high-quality petroleum treating chemicals with reliable availability, competitive commercial terms, and full compliance with project and operational requirements.

Main Equipment
Main Equipment
Treating Equipment Systems
Main Equipment
01
Treating Vessels and Columns
02
Heat Exchangers
03
Instrumentation

Key equipment used in petroleum treating includes separators, absorbers, contactors, regenerators, and desalters.

Heat exchangers are used for temperature control, solvent regeneration, and energy recovery across treating units.

Instrumentation ensures precise control of treating processes and safe operation in hazardous environments.

Treating Vessels and Columns

Key equipment used in petroleum treating includes separators, absorbers, contactors, regenerators, and desalters. Well-known manufacturers and suppliers:

Well-known manufacturers and suppliers:
UOP (Honeywell)
Axens
L&T Heavy Engineering
Doosan Enerbility
Mitsubishi Heavy Industries (MHI)

OGSCM provides sourcing and supply services for treating vessels, internals, mist eliminators, distributors, and associated mechanical components.

Heat Exchangers
Heat
Exchangers

Heat exchangers are used for temperature control, solvent regeneration, and energy recovery across treating units. Commercial suppliers include:

Commercial suppliers include:
Alfa Laval
API Heat Transfer
Hisaka
Kelvion
Tranter

OGSCM Group supplies heat exchangers and spare parts such as gaskets, tube bundles, and expansion joints.

Instrumentation
Instrumentation
Hazardous Environment Control

Instrumentation ensures precise control of treating processes and safe operation in hazardous environments. Major brands:

Major brands:
Emerson
Yokogawa
Honeywell
Endress+Hauser
ABB

TagFull NameFunction
PTPressure TransmitterSends pressure signal to control system
PIPressure IndicatorLocal pressure reading
TTTemperature TransmitterMeasures process temperature
FTFlow TransmitterMeasures liquid or gas flow
ATAnalyzer TransmitterMonitors impurity levels

Valves
Valves
Flow Control and Safety

Valves are essential for flow control, isolation, and safety across all petroleum treating processes. Major manufacturers:

Major manufacturers:
Emerson (Fisher, Vanessa)
Cameron (SLB)
Flowserve
L&T Valves
Neway
Kitz

OGSCM Group offers comprehensive procurement solutions for industrial valves, including control, safety, ball, gate, globe, butterfly, and check valves, with full documentation and technical support.