PTQ Q3 2023 Issue

HP steam

Oxidation

O-gas

Spent caustic

Sulphuric acid

Gas/liquid separation

Air

Cooling water

Neutralisation

Steam, air, o-gas Caustic Oxidised caustic Acid Brine

Cooling water

Neutralised brine

Figure 2 Mericon II oxidises all sulphides and thiosulphates to sulphates and destroys phenolics, naphthenics, and mercaptides

disposal of materials as waste, but it also reduces the pro- ducer’s waste generation statistics or reporting. The lifecycle of the caustic is extended and creates an asset from what may otherwise be perceived as a liabil- ity. It prevents pollution by reducing the need to harvest new feedstock, which in turn saves money and reduces CO₂ emissions and carbon footprint, for some by more than 50% relative to the complete product life cycle. Beneficial reuse also fits within the Guiding Principles of the American Chemistry Council’s Responsible Care initiative. Reimagine waste The oil industry is being held accountable for its impact on the environment and safety more than ever, making envi- ronmental, social, and governance (ESG) initiatives far more than an ethical imperative. They are an absolute necessity. As oil companies examine and modify their environ - mental footprint, the social aspect of ESG cannot be

overlooked. To lift negative connotations, the industry must better articulate its concern for the environment and improve its communication regarding actions being taken, demonstrating its understanding of society’s expectations for the industry. Rather than centring decisions and actions solely around shareholders, companies should consider the needs and wants of employees, customers, suppliers, and the communities in which they operate. Those key stakeholders are considering a company’s stance on soci- oeconomic factors and its position on sustainability in their decision-making. By openly embracing social responsibilities and being willing to execute them, the industry will change how it connects and is perceived. By articulating its environmen- tal and social dimensions, momentum will gather over time, providing oil companies and the industry with a voice in the marketplace to aid an informed public debate in its favour.

Fuel gas

O-gas

Gas stripping

To ATM

Acidication

Phase separation

Sul ph uric acid

Neutralisation

Cooling water

Process water

Neutral brine

Gas, water Caustic Brine Sulphuric acid

Acid/skim oil

Spent caustic

Fresh caustic

Figure 3 Mericon III treats unregenerated sulphidic, mercaptide, and naphthenic spent caustics

PTQ Q3 2023