Tag: Sulphuric Acid

Global sulphur benchmarks rallied at the end of February, underpinned by strong demand in Indonesia and stock drawdowns in China as fresh European sanctions on Russia targeted the port of Ust-Luga. Chinese buyers paid up to $225t/t c.fr for a cargo, with unconfirmed rumours of business at even higher levels. However, delivered prices still lag domestic port spot prices in China, which are now assessed at a delivered-price equivalent of around $242/t c.fr. China’s delivered sulphur price jumped significantly as port inventories declined, and new arrivals were limited. Only two new cargoes were reported in the last week of February, one from a mainstream source into southern China at $205/t c.fr, and the second at $225/t c.fr by a phosphate producer for the Yangtze River. The sulphur port spot transaction price is reported at around 2,0402,050 yuan/t FCA ($281-283/t), with the low-end up $26/t and high-end up $25/t compared with previous settlements. That port price indicates delivered values at around $242/t c.fr, which is $17/t higher than the import price on the Yangtze. Phosphate producers need to purchase more sulphur to meet the increased buying activity in northeastern market and the improving spring application season demand in northern China. Still, market sales availability is limited, as most port tonnes are held by traders instead of end-users, while traders are selling limited quantities now to push prices higher. Chinese total port inventory dropped to 1.89 million tonnes by 26 February 2025. The quantity at Yangtze river ports declined 59,000 tonnes to 633,000 tonnes, while Dafeng port inventory decreased 20,000 tonnes to 450,000 tonnes.

Rapidly increasing lithium production is projected to require several million t/a of sulphuric acid in the next few years, with China, the USA and Australia the main consumers.

The first installed combination of a regenerative SO2 scrubbing system with a sulphuric acid plant using Worley Chemetics’ CORE™ reactor technology started up in November 2022. The combination of these technologies allows production of high-grade sulphuric acid from gases with low and/or fluctuating SO2 concentrations. C. Trujillo Sanchez and R. Dijkstra of Worley Chemetics report on the design concepts of this integrated process, highlight where it is most effective and report on the start-up and first years of operation of the plant.

Apart from having a good plant design, good maintenance practices and good operational discipline are key to optimise the performance of an acid plant and to protect it from corrosion and achieve a long life. B. Mumba, T. Mwanza and P. Ng’ambi of Kansanshi Mining PLC explore the Kansanshi sulphuric acid plant operations and the key parameters monitored and practices adopted that have helped to extend the catalyst campaigns from two years to four years.

Fertilizer International interviews Graeme Cousland, Managing Director, and Martyn Dean, Sales Director, Begg Cousland Envirotec Limited.

Global sulphur prices were mostly assessed flat in mid-January, with only slight changes for China, Indonesia and India, while the first quarter contracts for the Middle East, North Africa and Tampa increased from the previous quarter. Overall, the number of transactions taking place globally has declined as subdued demand has limited trading activity in most delivered markets. The current sulphur price environment has been shaped by the combination of rising Chinese demand and higher Middle East f.o.b. prices in the second half of last year. As a result, some consumer markets such as Indonesia and India have been subject to upward pressure in order to remain attractive destinations. But demand remained lacklustre across delivered markets, leaving prices relatively stable.

New concepts focused on the transfer and combination of existing sulphur and sulphuric acid technologies to support decarbonisation of the sulphuric acid industry are being investigated. In this article three research projects are discussed: sulphur dioxide depolarised electrolysis for green regeneration of spent acid, use of renewable heat and catalyst to the splitting process from sulphuric acid to SO2 for reduction of fossil fuel consumption, and sulphur as an energy vector.

Nickel sulphate is an intermediate step in the production of materials for batteries, and is seeing rapid demand growth as the auto industry moves towards electric power trains.

Chile’s environmental regulator SMA has filed a charge against state-owned Codelco, alleging emission violations at its Potrerillos copper smelter in the Atacama region of northern Chile. An audit showed the company had not implemented a monitoring system for sulphur dioxide emissions and other procedures in accordance with environmental standards for the plant, Reuters news agency reported. The SMA labelled the charge as serious, which could lead to a fine of around $4.1 million, and possible revocation of the environmental permit or closure. Codelco had ten days to submit a compliance plan, and 15 days to present a defence.

A complete listing of all articles and news items that appeared in Sulphur magazine during 2024.