PetroChina's first ionic liquid alkylation unit

China Petroleum Network News (Reporter Ma Yidong correspondent Zhu Liqun) - As a key project of China Petroleum Refining and Transformation Transformation and 2018 Quality Upgrade, Harbin Petrochemical's 150,000 tons/year alkylation unit produces high-quality isobutylene. The alkane product raises octane value for cleaner driving. This product provides strong support to improve vehicle fuel standards, improve urban air quality, and implement the strategic deployment of Heilongjiang Province's "oil head"

The Harbin Petrochemical Alkylation Unit is the first ionic liquid alkylation unit of China National Petroleum Corporation. The project uses ionic liquid alkylation technology to produce alkylated fluid from C4 liquefied gas. The ionic liquid process has the advantages of less wastes and low equipment corrosion, compared to other alkylation processes. Harbin Petrochemical cooperates with Northeast Refining & Chemical Engineering Co., Ltd. and China University of Petroleum (Beijing) to implement 56 technological innovations and improvements.

Driven by the increased environmental management and the accelerated upgrading of refined oil products, alkylated gasoline has begun to attract attention in the market. Alkylation gasoline has the advantages of high octane number, low sulfur content, olefin-free aromatics, high yield, and good economic efficiency. It has become the first choice for high-grade gasoline and quickly occupied the domestic refining deep processing market.

During the construction and start-up of the alkylation project, relevant departments of Harbin Petrochemical Co., Ltd. coordinated scientifically, closely cooperated, and overcome difficulties. From the aspects of pre-design, material implementation and construction organization, they were deeply involved in the whole process of project construction and accelerated project design, procurement, and construction planning.

Construction targets included: strengthen construction site management, strictly control the quality of project construction, and ensure that the unit will be handed over on the agreed data to operations. Note fluids in the alkylation unit are flammable hydrocarbons. During the start of the plant, how the company's technicians work  will ensure that the equipment starts and operates without leakage or condensation is the key and difficult point of the startup. The company's leaders and installation staff adhere to their positions, focus their work on the implementation of the start-up plan, strictly control the safety, implement responsibility at all levels, and achieve safety, environmental protection, stability and control throughout the entire process.

Construction and commissioning of the 150,000-ton/year alkylation unit of Harbin Petrochemical Co., Ltd. are of great significance to the company's implementation of high-quality development, adjustment and optimization of product structure, and improvement of core competitiveness. The company passed the preliminary feasibility study and demonstration, and in November 2017, the feasibility study was approved and officially approved. In January 2018, the basic design approval was approved, and the design work was fully launched. In February 2018, the EPC contract was signed with the general contractor; the alkylation unit was 9 months in construction. On November 4th, the path to cleaner driving was successful.

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