Introduction to delta-valerolactone 542-28-9 and its polymerization

  Delta-valerolactone is an important intermediate in organic synthesis, ‌ is widely used in pharmaceutical research and development, ‌ organic research and development process and chemical production. ‌ its chemical name is 1, 5-pentolactone, ‌ is also known as tetrahydro2h-2-pyranone or tetrahydroo-pyranone, ‌ is Delta-Valerolactone, ‌ is shortened to delta-vL or DVL. ‌ Its molecular formula is C5H8O2, ‌ at room temperature appears colorless transparent to light yellow liquid.

  Delta-valerolactone has good application flexibility, ‌ low biotoxicity, ‌ and easy polymerization, ‌ these properties make it widely used in polyester, ‌ polyurethane, ‌ special solvent, ‌ coatings and other fields. ‌ In addition, due to the property of ‌, which is easy to form low molecular polymer, the ‌ liquid may appear reddish due to polymerization when ‌ is left at rest for a long time. ‌

  In the polymerization reaction, ‌ delta-valerolactone can participate in the polymerization process as a reactant. ‌The polymerization reaction usually involves ‌ under specific conditions, such as the control of a certain reaction ratio, ‌ reaction temperature and pressure, ‌ under the action of composite catalyst, ‌ by 1, 5-pentanediol dehydrogenation reaction to produce delta-valerolactone stock solution. ‌ Subsequently, ‌ can be obtained with high purity δ-valerolactone products by the treatment of ‌ by the lightening column and the rectification column. ‌ The process involves not only chemical synthesis techniques, ‌ but also the precise control and optimization of reaction conditions, ‌ to ensure the quality and yield of the product. ‌ ‌

  In China, the production of ‌ delta-valerolactone is still in its infancy, ‌ there is no industrial manufacturer at present. ‌ The domestic market demand is large, ‌ the annual demand is about 1500 tons, ‌ and the consumption is growing at a rate of about 15% per year. ‌ At present, the domestic market of ‌ is mainly monopolized by BASF of Germany, and the price of ‌ is high. ‌, therefore, ‌ domestic research and development and production of key technologies for the industrialization of delta-valerolactone synthesis process is of great significance, ‌ can not only fill the domestic gap, ‌ can also promote the further development of the industry, ‌ improve the product quality and market competitiveness of the industry.