The dependence on imported technology has exceeded 90%. How can polyethylene break through the bottleneck?

High-end polyolefin, one of the eight new chemical materials, is a polyolefin product with high technical content, high application performance and high market value
.

Through the polymerization of ethylene and propylene under the action of metallocene catalyst, mPE and mPP can be generated.
Ethylene is copolymerized with 1-butene, 1-hexene and 1-octene to form various ethylene α-olefin copolymers.
The higher the carbon number, the more difficult it is The larger the size, the copolymerization of ethylene and vinyl acetate to form EVA, and the copolymerization of ethylene and acrylic acid of the C3 industrial chain to form EAA
.

China's polyolefin products are mainly medium and low-end general-purpose materials.
At present, there are existing situations such as overcapacity and serious product homogeneity competition in China
.
The reason why the self-sufficiency rate of domestic high-end polyolefin products is so low is largely due to technical barriers
.

In 2020, China's polyethylene production capacity has exceeded 28 million tons, but the dependence of its production process on imported technology has exceeded 90%
.
More than 46% of the capacity is using Univation's Unipol gas phase process, and more than 17% is using LyondellBasell's slurry process
.

From the perspective of global production layout, high-end polyolefin production is mainly concentrated in Western Europe, Southeast Asia and North America, and the Middle East is dominated by bulk general materials, of which Japan is the main producer of high-end polyolefin in Southeast Asia
.
Related companies include ExxonMobil, Dow Chemical, BASF, LyondellBasell, Total, Mitsui Chemicals, Sumitomo Chemical, Asahi Kasei,
etc.
Taking mPE as an example, the global mPE production capacity is about 15 million tons, and the market size exceeds 200 billion yuan.
Among them, there are 5 enterprises with a production capacity of 500,000 tons per year or above, mainly in the United States, with a CR5 of about 40%, all of which have their own The mPE grades are technically blocked
.

Polyolefin waterproofing membrane

At present, although China's high-end polyolefin production technology is still immature, the product self-sufficiency rate is low, and the import dependence is high, but with the continuous increase of high-end polyolefin application demand, the industry has a good development prospect, which determines that China's polyolefin industry continues to be high-end.
, the strong trend of differentiation and other directions of development
.

China's high-end polyolefin industry has a lot of room for improvement.
PetroChina, Sinopec, Yantai Wanhua and others have begun to lay out the technical accumulation and hardware and software conditions for metallocene polyolefin industrialization, and are accelerating the high-end development of China's polyolefin industry.
process
.

Policy support also provides an opportunity for the development of high-end polyolefins.
During the "14th Five-Year Plan" period, the upgrading of China's polyolefin industry needs to focus on technological innovation in the development of high-end, differentiated and diversified products
.

Increase the development and market promotion of metallocene polyolefin elastomers, bimodal polyolefins, ultra-high molecular weight polyethylene and other high-end polyolefin products, and improve the special materials for polypropylene pipes, capacitor films, polyethylene automotive fuel tanks, The production ratio of high-end materials and special materials such as special materials for gas pipelines and automobile bumpers, so as to enhance the competitiveness of China's polyolefin industry
.
Therefore, high-end polyolefin products will be one of the key directions for the future development of the industry
.