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Wanhua Chemicals Group Co., Ltd. (P.R. China), a leading supplier in chemical products in China, has awarded to CONSER S.p.A. a contract for the production of Maleic Anhydride (MAN). The new plant will have a nominal production capacity of 200’000 tons per year of MAN, allowing Wanhua to own one of the largest MAN Plants in the world.

The Maleic Anhydride will be used to produce PBAT (Poly-Butylene-Adipate-Terephthalate), one of the main components of bio-degradable plastics, which decomposes thanks to the action of natural micro-organisms. Wanhua’s target is to increase the manufacturing of environmental-sustainable packaging. In fact, China’s demand for maleic anhydride and its derivatives is expected to grow really fast in the next years, driven by the industry’s focus on bio-degradable materials.

The overall capacity of 200’000 tons per year will be reached through the use of three reaction lines – 67’000 tons per year the capacity of each reactor system – manufactured by DWE (MAN Energy Solutions): thus this plant will be the first in the world with such a large capacity reached with only three reactor system.

Wanhua has chosen the Italian CONSER, leading Licensor of MAN worldwide, due to its extensive experience in the field of maleic anhydride and its derivatives, which allows CONSER to provide reliable plant design, with lower production costs, higher product quality and reduced environmental impact.



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- Published on 12th October 2021




Here below, the video about the construction progress of SIBUR MAN Plant dated last winter (English subtitles)


Plenipotentiary Representative of the President of Russia in the Urals Federal District, Vladimir Yakushev, and Governor of the Tyumen Region, Alexander Moor, have recently visited the Tobolsk site of Sibur - the ZapSibNeftekhim plant.

More than 70% of the equipment has already been installed at the construction site of a plant for the production of maleic anhydride (MAN) with a capacity of 45 thousand tons of products per year, the company's press service reported.

The construction will be completed within the end of 2021.

"The pandemic did not stop construction. All measures are being taken at the construction site to ensure the safety and health of employees in the context of the global COVID-19 pandemic," the words of Igor Klimov, General Director of ZapSibNeftekhim.


The MAN will be produced using CONSER technology, which was chosen by SIBUR as the most advanced and environmentally friendly, having at the same time the lowest production cost.

One of the last installed equipment is a compressor unit for supplying atmospheric air to the MAN synthesis unit. In addition to the compressor unit and the reaction unit, the MAN plant under construction will include: an absorption unit, a regeneration unit, a desorption unit, a steam generation unit, a storage unit for solid MAN, as well as its own substation, control room and a cooling tower.


The production of a high-margin product using its own raw materials (butane) will allow Sibur to increase the depth of hydrocarbon processing in Russia, completely cover the import of MAN and establish its export supplies to the markets of Europe and the Middle East, the company said.

The construction of a modern MAN production facility will also create additional opportunities for the development of domestic industries which will use MAN as raw material: construction, automotive, paints and varnishes and other industries.




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- Published on 13th April 2021




Here below, the video about SIBUR MAN Plant with a few words from Vladimir Mishin, Project Manager (Russian language only)


The erection of SIBUR maleic anhydride (MAN) production facility, licensed by CONSER, is progressing swiftly at the construction site of Tobolsk, Russia. The project execution begun at the end of 2018 under CONSER supervision, and, despite the slowdown due to the global pandemic of Covid-19, the start-up of the first MAN Plant in Russia is expected at the end of 2021. "Now all the main equipment: columns, tanks, pumps, heat exchangers and fans - is at the construction site and is being installed in accordance with the schedule" the press service of SIBUR's Tobolsk enterprises reported last November 2020.

Steel structures and up to 80% of equipment are Russian-made. Specific units and assemblies that are not yet produced domestically, including the main synthesis unit, have been ordered abroad.“You cannot buy specific equipment for MAN production in Russia,” says Vasily KAZAKOV, head of maleic anhydride production. “SIBUR is a pioneer in this topic, nobody produces MAN in Russia yet”. The key piece of the Plant – the MAN Reactor - arrived in Tobolsk last August 2020. The Synthesis Unit - 7.5 meters high, 9 meters in diameter and weighing 600 tons -, in which the main reaction of butane oxidation will take place, was assembled by MAN Energy Solutions in the German city of Deggendorf. From there, the equipment was delivered to Antwerp, then along the Northern Sea Route to the port of Sabetta, and the last segment of the route to the Tobolsk industrial port it covered along the Ob and Irtysh. Finally, the transportation of the oversized equipment from the industrial port to the construction site was managed by NIPIgaspererabotka – the leading Russian company engaged by SIBUR for the MAN Plant engineering services.In total, after travelling about 5000 kilometers, the process of delivering the oversized cargo to the construction site took about three months.

The MAN production capacity in Tobolsk will amount to 45 thousand tons per year. The finished product at the plant will be produced in two phases - liquid, which is then transported to tank containers, and solid, formed into briquettes or pastilles. 

Currently, maleic anhydride is not produced in Russia. The demand on the Russian market is 6 thousand tons per year, which is covered by imports. SIBUR expects to completely cover the import of maleic anhydride and to establish its export supplies to the markets of Europe and Turkey. Maleic Anhydride is widely used in various fields from automotive and shipbuilding to pharmaceuticals. It is used in the production of films, synthetic fibers, varnishes and paints, as well as in the food industry (malic acid is derived from maleic anhydride). 

The Italian process licensing company CONSER became the licensor of the MAN production technology, whose technical solutions, as a result of the analysis carried out by SIBUR, were selected as the most advanced and environmentally friendly, having at the same time the lowest production cost. In fact, CONSER technology features, such as the high efficiency of the absorption process and the off-gas recycle, allow to reduce the consumption of raw butane feedstock and to increase the production of maleic anhydride. Moreover, like other petrochemical plants of SIBUR in Tobolsk, the MAN plant will have a closed production cycle, and thus any possible negative impact of production on the environment and human health will be minimized.  



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- Published on 11th February 2021




CONSER на общественных слушаниях: «Татнефть» (Россия) развеяла опасения людей по поводу строительства нового завода по производству малеинового ангидрида (МАН) в Альметьевске


In the hall of the DC "ISKE Elmet" there were no empty seats last Friday 8th November 2019: about 200 people signed up for the Public Hearings on the Environmental Impact Assessment (EIA) of the maleic anhydride (MAN) production facility in Almetyevsk.

Representatives of TATNEFT, as well as the project developers, in particular ANTONIO IOSCO from the Italian company CONSER S.p.A., which is MAN process licensor, assured the residents of Almetyevsk about the safety of the future MAN installation. "This is the modernization of the Minnibaevsky Gas Processing Plant (MGPP), not the construction of a chemical plant," TATNEFT representatives explained while they were holding right in their own hands a piece of the same Maleic Anhydride around which passions had been simmering in Almetyevsk since the beginning of the summer. Opponents of the project did not have any strong arguments, and their leaders were disappointed in the protests.

Here below a video with an extract from the interview to Mr. Antonio Iosco from Italian Conser S.p.A. :



The audience was shown a film about the significant contribution of TATNEFT to environmental safety in the region over the past 30 years. More than 35 billion rubles have been invested in TATNEFT’s fourth large-scale environmental program. The ecological vector was attended also by the Director of the petrochemical complex of PJSC Tatneft, Syren Sakhapov, who himself grew up in the village of Nadyrovo-10 km from the MGPP. “Instead of explosive and fire-hazardous gas, we will get a non-explosive solid, a non-volatile substance in the form of scales” he said. Sakhapov also assured the audience that the air condition in Maktama and Almetyevsk will be monitored online, and the results will be available to everyone: by the spring in the city there will be automatic eco-monitors.

ANTONIO IOSCO, a representative of the Italian company-licensor CONSER, came to the microphone and said that a lot of household goods are made of maleic anhydride, but that Russia is now forced to import those goods due to lack of MAN. According to him, in the production process there will be no liquid effluents or solid waste, and the air that will be used, before returning to the atmosphere, will be purified in a thermal oxidizer, where all organic substances are burned.

"I can say for sure that the technology that Tatneft will use is the most advanced in the world, with the lowest environmental impact. I want to draw your attention to this: Russia is a country rich in natural resources, and n-butane is usually burned for heating. When we burn a ton of butane, we get 3 tons of CO2 in return. And from the same ton of butane we can get a ton of MAN and only a ton of CO2. At the same time, the molecules of anhydride are preserved, and products from them can be recycled, which, in our opinion, is a much more rational use of natural resources, " IOSCO said.

In addition, he explained that the production of maleic anhydride is much safer if compared to current MGPP complex, since gas, gasoline and kerosene have a much lower ignition point than maleic anhydride, so there are less risks. Then IOSCO showed maps of different cities in the world, and it turned out that MAN plants operate few kilometers from city centers. The licensor assured that since this plant will be the first in Russia, CONSER will make every effort to make it work properly and safely: create a 3D model of production, at least twice check the progress of construction, train operators and provide technical support services after launch.

Now the EIA and project documentation will have to pass the state environmental examination, and only then Glavgosekspertiza, where the papers will be checked for compliance with all standards. Commissioning of the MAN plant is expected in 2023. And Tatneft does not plan to close its information center at least until the New year — so that no one has any questions left.


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- Published on 13th November 2019

CONSER Team participated as Platinum Sponsor at Clariant Maleic Anhydride (MA) Conference, held in Munich from 14th to 17th October 2019.

The 3-days conference was a great opportunity for meeting clients and experts from all over the world to be informed about the latest #innovations in the production of MA, in an amazing and friendly atmosphere.

Different fields were covered by the network of participants, who were Process Licensors, #Catalyst Suppliers, Equipment Manufacturers, including Compressors and Reactors, and actual and future MA producers.

As leading process licensor, CONSER presented its unique and top features for the MA Technology, including the Off-Gas Recycle Concept and the Environmental Management System (EMS). In addition, various MA Derivatives of the rich CONSER Petrochemicals Portfolio were showed as valuable downstream products.

A special thank to all the Clariant Team for the hospitality and for the extraordinary organization!





- Published on 24th October 2019



PJSC Tatneft, one of Russia’s largest oil and petrochemicals producers, has announced plans to establish a new EUR 1.5 billion integrated chemicals and composites production cluster in the Tatarstan Republic, reports Eugene Gerden.

The new AlmA cluster will be established within the Almetyevsk Special Economic Zone (SEZ) and span the production of maleic anhydride (MAN), polypropylene, acrylonitrile, carbon fibres and composites.

According to Tatneft spokesman Siren Sakhapov, the production of maleic anhydride is particularly important as the basis for binder resins and production will be established with the world’s first three-reactor propane dehydrogenation system.

Future composites output will be supplied for the needs of various domestic industries, primarily wind generation and shipbuilding, as well as materials for the MS-21 medium-range aircraft, which has suffered from trade embargoes on the carbon composites it has in the past acquired from overseas suppliers.

The Italian technologies Licensor CONSER has been awarded the maleic anhydride (MAN) contract for the capacity of 50 ktons/year by TATNEFT in 2018.

Tatneft stresses that output from the new cluster will comply with all existing international standards and environmentally conscious technologies will be installed, including those from Italy’s Conser, with the emphasis on reliability, energy efficiency and the absence of emissions into the atmosphere and water.

The Tatarstan government has already promised to provide all necessary support for the implementation of the project and the new cluster is scheduled to be officially commissioned by 2025.


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- Published on 22nd October 2019


SIBUR has launched the construction of a maleic anhydride (MAN) production facility at SIBUR Tobolsk.

With a planned capacity is 45 ktpa, the facility is scheduled to go online in 2021, bringing new high-tech jobs to the market.

MAN is currently not produced in Russia and domestic demand is covered by imports. Launching the high-margin MAN will enable SIBUR to monetise its own feedstock (butane), improve the hydrocarbon processing rate in Russia, fully substitute MAN imports, and start MAN exports to Western and Eastern Europe and Turkey. In addition, a state-of-the-art Russian MAN production facility will provide new development opportunities for many domestic industries. As part of the Tobolsk production site, the new facility will enjoy ease of access to its infrastructure and feedstock flows, gaining more competitive power.

MAN Project Manager Vladimir Mishin commented: “We chose CONSER as the licensor for the project thanks to its cutting-edge MAN production technology. State-of-the-art technology and unique equipment prevent negative impact on the environment. The secured approval of the design documents by the state expert review board and the results of the public discussions confirm that the project fully complies with environmental laws and regulations.”

SIBUR has engaged NIPIgaspererabotka, a leading Russian centre for facility design, supply, logistics and construction, to develop the project engineering solutions. Russian contractors, including those based in the Tyumen Region, will be selected for construction and installation.

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- Published on 14th December 2018

Thursday, 22 February 2018 10:34


Butanediol (BDO)




1,4 Butanediol (BDO) is a low viscosity glycol used as intermediate for the synthesis of other chemicals and polymers.
Thanks to the high reactivity of the two bi-functional OH groups, Butanediol is used in a wide variety of applications, including: Tetrahydrofuran (THF) and Gamma-Butyrolactone (GBL) co-production in integrated plants, Polyurethanes, Elastic Fibres, Thermoplastic Elastomers, Spandex, Polybutylene-Terephthalate (PBT), Homopolymers and Copolymers Plastics and others.


CONSER technology is based on the esterification of Maleic Anhydride with methanol, followed by hydrogenation of the resulting ester, and the consequent co-production of BDO, Tetrahydrofuran (THF) and Gamma-Butyrolactone (GBL). The process allows very high flexibility in the final products distribution, with the highest purity standards, and it can be well integrated with the upstream Maleic Anhydride technology.


CONSER is able to provide the technical design also for emerging Butanediol biological route from bio-based Succinic Acid (BIO-BDO). For additional information on the latter, see ‘Bio-Butanediol (BIO-BDO)’ page. 


Dowload the Technical Document Download the Technical Brochure      



Published in C4 Cut Derivates