Senegal Sulfuric Acid Plant Equipment Guide (2026)

Senegal’s sulphuric acid equipment demand runs through one buyer and one project. Industries Chimiques du Sénégal (ICS) is adding a 700 tonnes per day plant at Darou inside a $210 million fertiliser modernisation running to 2028. For an OEM, that is a single sulphur-burning, double-absorption line to quote, and it breaks into a handful of procurement islands with very different metallurgy and lead times.

The acid unit is not the product. It is the front of the phosphate chain. The 700 t/d of acid feeds the phosphoric acid plant at Darou, which climbs to 660,000 tonnes per year under the same programme, per the scope reported by Hydrocarbon Processing. Sulphuric acid is the reagent that digests phosphate rock into the merchant-grade acid that then becomes DAP, NPK, and SSP. The buyer is filling a gap in a running fertiliser complex, so every equipment decision on the acid line traces back to phosphoric acid throughput downstream. For the wider fertiliser package around this unit, see our Senegal fertiliser plant equipment suppliers guide, and for the country-level FX and procurement picture, the Senegal industrial and procurement guide.

The Equipment Scope, Island by Island

A 700 t/d sulphur-burning double-contact double-absorption (DCDA) plant is a well-defined machine. ICS burns elemental sulphur rather than roasting metallurgical gas, which means the gas train is dry and there is no wet gas-cleaning section to quote. That simplifies the scope and shifts the cost weight onto the converter, the absorption circuit, and heat recovery. The islands a supplier bids into:

• Sulphur handling and melting. Molten sulphur pits, steam-jacketed melters, filtration, and alloy sulphur pumps and spray guns feeding the furnace. Carbon steel and 316L dominate here, so this is the lowest-metallurgy, most commoditised island.
• Furnace and waste-heat boiler. A refractory-lined sulphur furnace and a fire-tube or water-tube waste-heat boiler that drops the combustion gas from around 1,000 degrees C and raises high-pressure steam. This is a heavy, long-lead item and one of the two steam sources on the plant.
• Catalytic converter and gas-to-gas exchangers. A four- or five-pass converter charged with vanadium-pentoxide catalyst (Topsoe VK-series, BASF, or equivalent), plus the shell-and-tube gas-to-gas heat exchangers that manage bed temperatures. The double-contact configuration means an intermediate absorption pass, which is what lifts conversion above 99.7 percent and keeps stack SO2 low.
• Absorption towers and acid coolers. Brick-lined interpass and final absorption towers with alloy acid distributors, plus anodically protected shell-and-tube or plate acid coolers. This island lives in the most punishing duty on the plant, so the metallurgy matters more than the price. Acid-wetted parts run in proprietary alloys such as Sandvik SX, Elessent ZeCor, or Saramet, and the tower brick and membrane lining is a specialist package in its own right.
• Acid circulation and pumping. Vertical alloy pump tanks, acid circulation pumps, and the acid-proof piping loop. Alloy selection and gasketing decide the maintenance interval, and this is where a documented service history wins over a low bid.
• Heat recovery and cogeneration. Beyond the waste-heat boiler, a heat-recovery system on the absorption circuit captures low- and medium-grade heat that would otherwise go to the acid coolers. On a plant this size that steam is worth real money. It runs the phosphoric acid concentration downstream and can drive a small turbogenerator, which is why the buyer will weigh a heat-recovery package on total steam export, not just on capital cost.

The practical read for a supplier: quote to the island, not to the plant. A pump OEM, a heat-exchanger house, a brick-lining specialist, and a catalyst vendor are all bidding different tenders on the same unit, usually through the process licensor rather than direct to ICS.

Who Buys, and How the Acid Deal Gets Paid

ICS is the buyer, full stop. It runs the phosphate mine at Taiba, the acid and phosphoric plants at Darou, and the granulation plant at Mbao, and it is the largest industrial procurement counterparty in Senegal outside oil and gas. One structural note for 2026: ICS moved back under Senegalese state stewardship in early 2026, ending a decade-long private management mandate held by the Indorama group. Treat that as a factual ownership transition, not a story. The acid unit’s scope, capacity, and 2028 timeline are unchanged, and a state-stewarded strategic asset tends to run capital procurement through more formal, documented tender channels, which suits a foreign OEM with a clean paper trail.

Payment is where Senegal beats most of its neighbours. With nominal GDP near $33 billion and growth above 9 percent in 2025, per the World Bank country data, the buyer side has hard-currency capacity. The West African CFA franc (XOF) is hard-pegged to the euro at 655.957 per euro through the BCEAO, with full convertibility, so a European supplier quoting an acid-plant package in euros carries no devaluation risk. Documentary credits clear through Société Générale Sénégal, CBAO (Attijariwafa), Ecobank, Bank of Africa, and UBA, with confirmation by a European correspondent bank standard above roughly $20 million.

Two things are specific to a sulphuric acid line. First, the sulphur feedstock is priced and invoiced in US dollars, so an ICS package can mix a euro-denominated equipment scope against a dollar-linked consumables clause. Quote the equipment in euros to remove your own FX exposure and be explicit about which currency each milestone settles in. Second, export-credit cover decides more of these deals than price does. Chinese kit comes wrapped in Sinosure cover; Western kit leans on Bpifrance Assurance Export, SACE, or Euler Hermes. Import data from the ANSD 2024 trade note shows China as Senegal’s top import origin by value and France second, so a bid without a financing wrap usually sits across the table from one that has it.

The Licensor and EPC Route

Nobody sells a converter or an acid cooler straight into ICS off a cold call. Sulphuric acid technology runs through a short list of licensors, and a component supplier gets specified by being on their approved vendor lists before the tender opens. The recognised names on sulphur-burning DCDA are Elessent Clean Technologies (the former DuPont MECS), Metso, and Worley Chemetics, with Topsoe on catalyst. These houses either supply the core proprietary equipment directly or nominate the sub-tier pump, exchanger, and brick-lining vendors they will accept.

For a pump, valve, heat-exchanger, or instrumentation supplier, the entry point is twofold. Get onto the licensor and EPC approved-vendor lists that will frame the ICS tender, and hold a direct line into ICS engineering at Darou for the aftermarket and spares that never route through an EPC at all. Chinese EPC groups bid the full acid-to-fertiliser package aggressively, usually paired with Sinosure financing, while European and Indian contractors compete harder on unit-replacement and revamp scopes. The acid coolers, catalyst reloads, and brick relining in particular are recurring spend that the plant tends to contract directly once the unit is running.

Tender Entry Points

Three doors matter. APIX is the investment and major-works agency, and it administers the customs and tax exemptions on imported capital goods that materially change the delivered cost of an acid-plant package. Public and parastatal works publish through DCMP and the SYGMAP national portal under the ARCOP regulator, in French. And direct engagement with ICS engineering at Darou and Mbao remains the route for revamp and spares.

The language point is not optional. Senegal is francophone, and parastatal tender documents are issued in French. English travels fine at the international-licensor and EPC layer, but a proposal pack with a French version is the working standard for anything touching APIX, ARCOP, or a state-stewarded buyer. Budget for the translation on day one, not after the shortlist.

The Conventional Channels Losing Ground

The traditional routes into a project this specific are getting more expensive and less productive.

Sulphur and acid conferences are thinning as a lead source. The Argus and CRU sulphur and sulphuric acid events and the IFA annual conference still matter for technology intelligence, but the cost per qualified lead has climbed past $300 to $900 once you count booth, freight, and staff travel, and senior ICS buyers increasingly send junior engineers while the decisions stay in Dakar. The Foire Internationale de Dakar (FIDAK) reaches a general trade audience, not an acid-plant engineering desk.

Expat field reps do not pencil out. A technical sales rep based in Dakar runs $120,000 to $180,000 fully loaded for perhaps six to twelve closed deals a year, which puts cost per qualified lead at $500 to $1,200. That math collapses against a market with essentially one anchor acid plant to cover.

Distributor and legacy-channel lock-in is fragmenting. A large share of industrial supply into Senegal still routes through established Dakar importer-distributors and through Chinese and French supply channels tied to specific EPC contractors. That works for commodity spares. It leaves the specialist acid-plant OEMs, the alloy pump and cooler houses, under-connected to the ICS engineering desk where the revamp and reload decisions actually get made.

None of these channels is dead. They just scale linearly or worse, and every one costs more per lead as you push for volume. A country-specific outbound engine runs at $150 to $300 per qualified lead at the start and gets cheaper as it learns the buyer map, because it targets named ICS engineering and procurement contacts directly, in French and English, every working day of the year.

FAQ

Who buys sulphuric acid plant equipment in Senegal?

Industries Chimiques du Sénégal (ICS) is the single buyer. It is adding a 700 tonnes per day sulphuric acid unit at Darou inside a $210 million modernisation to 2028. The acid feeds the phosphoric acid plant on the same site, so specification decisions trace to downstream fertiliser throughput.

What equipment does a 700 t/d acid plant actually need?

A sulphur-burning double-absorption line: molten-sulphur handling, a furnace and waste-heat boiler, a catalytic converter with vanadium catalyst, gas-to-gas exchangers, brick-lined absorption towers, alloy acid coolers and circulation pumps, and a heat-recovery package for steam export. The gas train is dry, so there is no wet gas-cleaning scope.

How do acid-plant equipment deals get paid in Senegal?

The XOF is pegged to the euro at 655.957 via the BCEAO, so euro-denominated contracts carry no devaluation risk. Deals settle through documentary credits with local banks, confirmed by a European correspondent bank above roughly $20 million, and are often decided by Sinosure or Western export-credit cover.

Do I need to bid in French for the ICS acid tender?

English works at the international licensor and EPC level. But parastatal tenders publish in French through SYGMAP, and ICS under state stewardship is formalising procurement, so a bilingual proposal pack is the safe working standard for anything touching APIX or ARCOP. Plan the translation upfront.

Is this a greenfield build or a revamp?

The 700 t/d unit is a new plant inside a running complex, so it sells like a greenfield line for the core islands but with revamp discipline: short tie-in windows, existing utilities, and an operator who values suppliers who can commission without stalling the fertiliser chain. Spares and catalyst reloads are recurring aftermarket on top.

Send Us Your Spec

If you supply converters, acid coolers, alloy pumps, brick-lined towers, catalyst, or heat-recovery packages and want the ICS acid line on your radar, we map the named engineering and procurement contacts at ICS and the licensors framing the tender, then run a continuous, bilingual pipeline into them. Send your spec, drawings, capacity range, and metallurgy and we will route it to the right buyers. Contact us or reach Burak directly at burak@papaverai.com to scope a Senegal-focused approach. For the full fertiliser package around this unit, start with our Senegal fertiliser plant equipment suppliers guide.