Spent caustic - Wikipedia
Spent caustic is a waste industrial caustic solution that has become exhausted and is no longer useful (or spent). Spent caustics are made of sodium hydroxide or potassium hydroxide, water, and contaminants.
Spent Caustic Handling | Recycle and Reuse - Merichem
Merichem ® is the leader in spent caustic management via recycling and beneficial reuse. With deep expertise and proven end-to-end solutions, we can reduce waste disposal and reporting, remove spent caustics reliably and reuse them to improve environmental sustainability.
What is the Spent Caustic? Spent caustic is a waste product generated by chemical and petroleum sweetening processes. Spent caustic is produced during the production of high quality: Ethylene. LPG. Gasoline. Diesel. Kerosene. Natural Gas. Typical Spent Caustic Constituents. Classification. Hazards. Why is spent caustic difficult to dispose of?
Spent caustic treatment and reuse - DigitalRefining
Spent caustics. In refinery and midstream processes, caustic, an aqueous sodium hydroxide solution, removes impurities such as environmentally undesirable sulphur compounds and carbon dioxide (CO₂) from various liquid streams.
(PDF) An Extensive Review On Spent Caustic Treatment Methods In …
Jun 25, 2018 · Spent caustic is considered to be one of the liquid industrial wastes that are not easy to handle and to dispose of, due to its high content of pollutants, alkalinity (pH > 12), high salinity...
COD removal from industrial spent caustic wastewater: A review
Jun 1, 2020 · Spent caustics contain compounds such as mercaptans, sulfides, and phenols. In addition, spent caustic solutions are highly alkaline and have high chemical oxygen demand. There are different ways to treat caustic waste.
Comparison of different strategies to treat challenging refinery spent ...
Dec 15, 2020 · Spent caustic is a very complex matrix of organic oxygenated contaminants and mercaptans. Phenolic derivatives, monoaromatic and polycyclic aromatic compounds, cycloalkanes, ethers, ketones and some esters are often found in caustic refinery effluents.
Spent Caustic Solution - an overview | ScienceDirect Topics
Jan 5, 2010 · There is a potential for exposure to hydrogen sulfide, caustic (sodium hydroxide), spent caustic, spent catalyst (Merox), catalyst dust, and sweetening agents (sodium carbonate and sodium bicarbonate).
Characteristics and Treatment of Wastewater from the Mercaptan …
Apr 3, 2020 · Spent caustic (SC) is the name of the solution obtained once the mercaptans react with NaOH. Without adequate treatment, SC can cause environmental problems. The main focus of this comprehensive review is to expose different techniques released and mentioned in the literature, to process the SC.
An Overview of Spent Caustic Treatment in a Refinery
Nov 3, 2022 · • Spent caustic refers to expended solutions of water and sodium hydro xide used to sweeten hydrocarbon products. • This is done by removing sour components such as...