1-Heptene is one of the high-carbon α-olefin products. my country has industrial production capacity

1-Heptene, also known as n-heptene, is one of the high-carbon α-olefin products with the chemical formula C7H14. It is an organic compound that appears as a colorless and transparent liquid. It is insoluble in water and soluble in ethanol, ether, acetone, etc. A variety of organic solvents are flammable and may burn and explode when exposed to open flames, high heat, or oxidants, and may decompose into carbon monoxide, carbon dioxide and other gases.

The preparation methods of 1-heptene mainly include: using petroleum fractions as raw materials, obtained by separation and extraction; using heptanol as raw materials, obtained by dehydration and other processes; in the presence of catalysts, ethylene and internal olefins undergo a cross-metathesis reaction; using propylene , butene is used as raw material, copolymerized under the action of catalyst and then separated. Among them, the olefin cross-metathesis method has the advantages of simple process flow, easy control of reaction conditions, and low energy consumption. However, the catalyst has high development barriers, which has a great impact on the yield of 1-heptene and the performance of the final product.

According to the “China 1-Heptene Industry Market In-depth Research and Development Prospects Forecast Report 2023-2028” released by the Industrial Research Center , 1-Heptene can be used as an organic synthesis intermediate, organic synthesis raw material, used to prepare isooctyl alcohol, plasticizer and other products, and can also be used as a solvent. 1-Heptene can be produced through oxo-synthesis to isooctyl alcohol, which is esterified with phthalic acid to produce diisooctyl phthalate (DEHP), which is used in polyvinyl chloride (PVC). Plasticizer. Plasticizers can improve the flexibility, fluidity, plasticity and other properties of plastics. my country is the world’s largest plastic producer. As the most common general plastic, polyvinyl chloride has a huge output. In 2022, the output will be close to 23.8 million tons. In theory, , 1-heptene has large development space.

DEHP and DOP (dioctyl phthalate) are commonly used plasticizers for polyvinyl chloride. In practical applications, the preparation of isooctyl alcohol usually directly uses propylene and butene as raw materials, catalytic copolymerization to obtain mixed heptene containing 1-heptene, and then obtains it through carbonyl reaction, using 1-heptene as raw material to prepare isooctyl alcohol. Octanol is expensive. In the early days, due to the narrow application field and difficult production, my country did not realize the industrial production of 1-heptene. Globally, the U.S. petrochemical industry has advanced technology and began exporting 1-heptene products at the end of the 20th century.

Industry analysts said that 1-heptene is a high-carbon α-olefin. With the increasing accumulation of technology and experience, my country’s chemical industry The industry structure is constantly upgrading, and high-carbon α-olefins have become one of the focuses of attention; my country’s new material R&D and production capabilities continue to improve, the demand for fine chemicals continues to grow, and the application scope of high-carbon α-olefins is constantly expanding, driving its demand to continue to rise. . In this context, 1-heptene production has received attention. In July 2023, Inner Mongolia Yitai Group’s 1,000-ton Fischer-Tropsch synthesis α-olefin separation and purification demonstration unit was successfully launched. It can produce high-purity single-carbon α-olefin products, including 1-heptene, filling a domestic gap.