Acetic acid

Guichon manufactures valves specially adapted to the production of Acetic acid :

Check valve & Sight glasses & Strainers, Ball and plug valve, Globe valve, Tank bottom valve, Gate valve, Butterfly valve

Swing check valve
Type : 902

DN 1/2" to 24" Class 150 to 2500 Lbs

– Stainless and duplex steels, nickel alloys, special alloys (titanium, zirconium)

Sight glass
Type : 803

DN 1/2" to 8" Class 150 to 300 Lbs
– End connections : solid or screwed-on flanges
– Stainless steels or alloys

Ball valve
Type : 302N

DN 3/4"/1"1/2 Class 300 Lbs
– Reduced bore
– Titanium T40


  • Construction materials: Carbon Steel (CS), Stainless Steel (SS), Duplex & Super Duplex, Titanium, Zirconium, Uranus® B6, Tantalum, Nickel, Hastelloy®, Monel
  • Construction methods: Fabricated (Welded), Cast, Solid


  • Service conditions: High pressure, High temperature, Low temperature, Abrasion, Corrosion, High viscosity, Vacuum, Reliability, Low acoustic signature, Dead space free
  • Types of fluids: Liquids, Liquids with solid particles, Gas, Powder and powdery media, High viscosity fluids

FAQ - Acetic acid

Acetic acid – Uses of Acetic acid :

– Manufacture of acetic anhydride, cellulose acetate, vinyl acetate monomer, other acetates, acetylsalicylic acid, chloroacetic acid …
– Manufacture of pharmaceuticals, dyes, insecticides, photographic, …
– Food industry (production of fruit vinegar …)
– Textile Industry,
– Component of cleaning agent in the manufacture of semiconductors,
– Coagulant Natural Latex,
– Bacteriostatic agent (medical applications of acetic acid solutions)

Posted in: FAQ - Acetic acid

Acetic acid – Manufacturing process for Acetic acid :

Acetic Acid is a largely used industrial product, with a world demand of about 6 million tons per year. Most of the production processes are based on the carbonylation of methanol promoted by an iodine compound and catalysed by Rhodium catalyst (Monsanto process) or Iridium catalyst (Cativa process). Monsanto method was used intensively until 1996 when BP Chemicals introduced the Cativa process, which is a more efficient technology that significantly reduces the cost and produces a high quality acetic acid with very low impurity content.

Iridium-based catalyst is responsible for a series of major improvements on the carbonylation of methanol process. Being more stable allows to extend the previously limited operating conditions. For instance a highly concentrated methanol feed can be used (0.5% water) instead of a 10% water content in Monsanto. This greatly reduces the impact of the side reaction between water and carbon monoxide and consequently improves the selectivity. The overall impact is a less expensive downstream purification process of the acetic acid compared to the technology used in Monsanto process. To be more specific, the new configuration uses a compact two distillation columns configuration.The major units of a commercial scale Cativa methanol carbonylation plant are shown in the following figure.

Figure 1. Simplified process flowsheet for a Cativa-based acetic acid plant

Posted in: FAQ - Acetic acid

Acetic acid – Recommended valves :

the valves involved in the acetic acid manufacturing process have to resist to severe corrosion

Posted in: FAQ - Acetic acid