Our Refinery Services business is a leading producer of Sodium Hydrosulfide (NaHS) and is an established marketer / logistics manager of Caustic Soda (NaOH) and Sulfidic Caustic.

We supply the foundation for many finished products used everyday throughout the world by managing sodium (Na) and sulfur (S) processes in the petrochemical, pulp and paper, mining, tanning, water treatment, specialty chemicals and environmental industries.

Genesis Energy Refinery Services’ technical expertise allows the company to formulate products to your specifications.

Sodium Hydrosulfide

NaHS is a unique alkaline product, playing a vital role in many industrial processes. Solutions of NaHS are available and shipped in concentrations of 20 – 47 percent. Shipments are expedited to our customers around the globe by tank truck, railcar, barge and ship.

Manufacturing Process

NaHS is primarily produced by scrubbing a H2S stream with NaOH, as shown in the following reaction:


Sodium Hydrosulfide Markets & Applications

NaHS is a key component in many industrial processes involving sulfur requirements.

NaHS is an effective means of sulfidizing oxide ores and is used most commonly to separate Copper (Cu) from Molybdenum (Mo). NaHS does this by depressing the Cu from the Cu-Mo concentrate, allowing for conventional floatation metal separation.

NaHS is used in the Kraft pulping process to prepare synthetic cooking liquor (white liquor) during pulp mill outages and as a make-up chemical to replace lost sulfur values. It may also be used as a scrubbing media for residual chlorine dioxide generated and consumed in mill bleach plants.

NaHS is used in various industries for applications including, but not limited to, agricultural, dyes, and other chemical processing.

NaHS is used for removing hair from hides at the beginning of the tannery process.

NaHS is an effective tool in waste treatment programs requiring stabilization and reduction of heavy and toxic metals through precipitation.

NaHS is used for deoxygenation of injection water to reduce subsurface arsenic mobilization.

Caustic Soda

NaOH is a key element in many processes and products. It is typically produced as a 50 percent solution, which is the most convenient and economical form for transporting and handling. Solutions are strongly alkaline and have a high pH. Caustic soda is not combustible, has no flash point, no auto ignition temperature and no explosive limits.

NaOH is manufactured from sodium chloride (salt), typically mined from underground deposits. Water is pumped into a salt vein, and the dissolved salt solution (brine) is pumped out through an adjacent well, piped to the plant, heated, purified and treated for contaminants. This ultra-pure salt solution is then pumped into an electrolytic cell, where it is electrified by direct current as follows:

Casutic Soda Chemical Makeup

Caustic Soda Markets & Applications

NaOH is one of the basic building blocks in many industrial operations and has a wide range of applications.

Common Uses:

  • Aluminum production
  • Bleach cellophane
  • Detergents
  • Drain pipe cleaners
  • Drilling fluids
  • Dyes
  • Food processing
  • Fruit and vegetable peeling
  • Leather manufacturing
  • Metal cleaning soap
  • Ore processing
  • Paint removers
  • Paper pulp, petroleum gas sweetening
  • Pharmaceutical, plastics
  • Rayon sodium oxide source
  • Water treatment

Sulfidic Caustic

Genesis Energy Refinery Services offers sulfidic caustic solutions as an additional source of sodium and sulfur. Sulfidic caustics are typically high alkaline sodium and sulfur solutions. Diesel or kerosene fuels, as an example, are treated or scrubbed with caustic soda to extract residual acidic impurities such as hydrogen sulfide (H2S), mercaptans and organic acids. Sulfidic caustic may be used as supplement to pulping liquor for sodium and/or sulfur additions.