Secco Petrochemical Complex, China


The Anglo-Chinese partnership between BP, Sinopec and Shangai Petrochemical Company (SPC) has commissioned its manufacturing site in Shanghai, China. A ceremony to mark the occasion was held on 29 June 2005.

The jv company, known as Secco, invested $2.7 billion to build its petrochemical complex which is centred around a 900,000t/yr cracker based on naphtha feedstock. Some 590,000t/yr of propylene will also be produced. Derivative output will include polyethylene (600,000t/yr), polypropylene (250,000t/yr), aromatics (500,000t/yr), styrene (500,000t/yr), polystyrene (300,000t/yr), acrylonitrile (260,000t/yr) and butadiene (150,000t/yr).

ANHYDROUS AMMONIA

A supply and purchase agreement between Secco and Yara will see the company supplying the complex with anhydrous ammonia. Yara, formerly part of Norsk Hydro, is a global supplier of fertilisers, industrial gases and chemicals.

LOGSTICS

Road transportation service contracts for solid products have been signed with Shanghai Ba-shi Yuexin Logistics Development Co, SCIP Logistics Co and Shanghai Port International container Forwarding Co.

NATURAL GAS SUPPLY

A long-term natural gas supply agreement was signed with Shanghai Natural Gas Pipeline Network Co.

BACKGROUND

A letter of intent to develop the complex was signed in 1996. Shanghai Secco Petrochemical Company Ltd was formed in 2001 and construction of the complex at the 220ha site began in 2002. Mechanical completion was achieved in December 2004.

ETHYLENE UNIT CONSTRUCTION

ABB Lummus Global, part of ABB Oil, Gas and Petrochemicals, in co-operation with Sinopec Engineering, was awarded a contract by Secco to provide engineering, procurement and the technology licence for the 900,000t/yr naphtha cracker. The contract is valued at a total of $385 million, of which ABB's portion is around $200 million. ABB's proprietary ethylene and olefins conversion technology is being used in the production units.

ETHYLENE PRODUCTION TECHNOLOGY

ABB's proprietary ethylene technology is based on the SRT pyrolysis furnace module which is designed for short residence time and low pressure drop. As well as high thermal efficiency and yields it has a long run time between coil decoking. At the same time online-decoking technology eliminates the need to mechanically decoke the furnace and transfer line exchangers.

OLEFINS CONVERSION TECHNOLOGY (OCT)

ABB's olefins conversion technology is used to combine n-butenes with ethylene to produce polymer-grade propylene. This technology can be used with a number of C4 streams including mixed C4s used in steam cracking, raffinate C4s from MTBE or butadiene extraction and C4s produced in fluid catalytic cracking units.

BUTADIENE EXTRACTION PLANT

At the beginning of 2003 ABB announced that it had been awarded a contract by Secco to provide technology for the 90,000t/yr butadiene unit. The butadiene extraction unit is based on proprietary technology provided by ABB Lummus Global/BASF, which uses n-methlpyrrolidone (NMP) as a solvent. This solvent is said to be less toxic and more stable compared with other solvents.

LINEAR LOW DENSITY POLYETHYLENE PLANT (lldPE) CONSTRUCTION

Design and construction of two linear low density polyethylene (lldPE) plants is being carried out by France-based Technip-Coflexip, in association with Sinopec Shanghai Engineering Company (SSEC). The lumpsum turnkey contract is valued at around $205 million. Each plant produces 300,000t/yr of lldPE and uses BP's gas phase Innovene technology. Technip-Coflexip performed front end engineering and design. Detailed engineering, equipment supply, construction and pre-commissioning were carried out with SSEC.

PROJECT MANAGEMENT TEAM

UK-based Amec was selected as support contractor to work as part of an integrated project management team (IPMT). The team monitored and controlled a number of the prime contractors involved in the construction of the production plants. Amec was also involved in providing the project management procedures and systems to ensure the necessary management control, safety and conformity across the project. Amec utilises its Convero and 'Amec Total Risk Management' programmes on the project.

PETROCHEMICAL COMPLEX AUTOMATION

Shanghai Secco Petrochemicals Company awarded Emerson Process Management a contract valued at $30 million to serve as the main instrument vendor for the integrated petrochemical complex. Emerson integrated its PlantWeb digital architecture, 'Asset Optimisation' technologies and services for the complex. PlantWeb provides a platform for collecting, analysing and sharing operations and diagnostics information for the personnel operating the complex.

More than 23,000 foundation fieldbus devices and ten DeltaV digital automation systems control the cracker and downstream derivative plants.

SUPPLY OF NITROGEN AND HYDROGEN

During May 2003 Shanghai Chemical Industry Park Industrial Gas Company (SCIPIG) signed an industrial gases supply contract with Shanghai Secco Petrochemical Company. Under the contract SCIPIG will supply nitrogen to the 900,000t/yr ethylene cracker and downstream derivative plants.

SCIPIG has built two gas plants including an air separation plant for the supply of nitrogen, oxygen and compressed air and another to supply hydrogen and carbon monoxide. SCIPIG is a joint venture between Praxair and Air Liquide.