[Ocean Chemical News] China Tianchen and others won the bid for the Tianjin Bohua Propylene Oxide/Styrene Project
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On October 9, China National Chemical Corporation, China Tianchen, Sinochem Second Construction (the main body of the consortium), and No. 13 Chemical Construction won the bid in the form of a consortium for the "two industrialization" relocation and transformation project of Tianjin Bohua Chemical Development Co., Ltd. - 200,000 tons of propylene oxide co-production of 450,000 tons of styrene monomer (co-oxidation method) EPC general contracting project Section I, with a construction scale of 25,689 square meters and a winning bid amount of 1.843 billion yuan. The "two industrialization" relocation and renovation project of Tianjin Bohua Chemical Development Co., Ltd. was registered on February 3, 2016, and the environmental impact assessment was approved in July 2016. The total investment is 29.4 billion yuan, and it is expected to be completed and put into operation in 2020. The project focuses on the development of two product chains: methanol to olefins and ethane cracking to ethylene, and build a modern high-end industrial cluster. The project is located south of Xigang Pool and east of Nangang Sixth Street, Nangang Industrial Zone, Tianjin Economic and Technological Development Zone. On July 18, the groundbreaking ceremony for the "two industrialization" relocation and renovation projects of Tianjin Bohua Chemical Development Co., Ltd. was held in Tianjin Nangang Industrial Park. Sinopec Luoyang Research Institute is the EPC general contractor for the methanol-to-olefins unit of the project, and Tianchen Engineering Co., Ltd. is the EPC general contractor for the 300,000 tons/year polypropylene unit of the project. Tianjin Bohua's "two industrialization" relocation and reconstruction projects include the construction of a new 2×1.8 million tons/year methanol-to-olefins (MTO) unit, a 300,000 tons/year polyethylene (PE) unit, a 2×300,000 tons/year polypropylene (PP) unit, a 600,000 tons/year ion membrane caustic soda, an 800,000 tons/year polyvinyl chloride (PVC) unit, and a 60,000 tons/year ethylene oxide unit. Alkane (EO), 40,000 tons/year surfactant (EO, AEO) and water reducing agent (PEG) devices, 200,000 tons/year propylene oxide co-production 450,000 tons/year styrene (PO/SM) device, 100,000 tons/year polyether PPG), 30,000 tons/year polymer polyol (POP) device, 100,000 tons/year hydrogen peroxide device, etc.
Don’t know what process propylene oxide uses?
2011* * It is clearly stated in the promulgated "Guidance Catalog for Industrial Structure Adjustment (2011 Edition)" * * New chlorohydrin propylene oxide plants will be restricted. It can be seen that HPPO, as a green and environmentally friendly process, has a promising future.
HPPO (Hydrogen Pero* de Propylene o * de) method, as the name suggests, uses hydrogen peroxide as raw material to directly oxidize propylene to produce propylene oxide. This process started relatively late in China, and there are currently two companies applying it. The process of this method is simple, the reaction does not produce toxic and harmful gases, there are very few by-products and it has high added value. The water produced in the reaction can be recycled as process water, which is clean and environmentally friendly. There are currently three problems: First, it is difficult to store and transport hydrogen peroxide. There must be relevant purchase channels or a hydrogen peroxide device must be built near the PO device. ； Second, the proprietary nature of the catalyst makes its cost higher. ； Third, domestic industrialization time is relatively short and the technology still needs to be improved. However, as domestic enterprises continue to research and innovate, in addition to Sinopec Changling's independently developed HPPO process, the PO device of Jiangsu Blue Planet Company that is about to go online also adopts domestically independently developed HPPO processes.
It seems that it should be the co-oxidation method. The co-oxidation method is also called the introduction oxidation method or the co-production method. At present, there are four domestic companies that use the co-oxidation method to produce PO (excluding Hongbaoli, which is still in trial operation). Two of them use PO/SM and the other two use PO/MTBE. Application of co-oxidation method * * The generation of waste residue and waste water is reduced, and the sale of co-products can reduce costs to a certain extent. However, it is worth noting that the process of co-oxidation method is usually complicated, the investment cost is high, and the profit is often restricted by the co-product market.
It is clearly written in the content, co-oxidation method;P