{"product_id":"eypesrmss","title":"ECS-Y Polyester Synthesis Reactor (Max. 300°C, 3 MPa) with Mechanical Shaft Stirring, EYPESRMSS","description":"\u003cp data-path-to-node=\"0\"\u003eFor polyester synthesis—specifically via polycondensation—the reactor design must handle a significant transition in physical properties, as the reaction mixture moves from a low-viscosity monomer melt to a high-viscosity polymer. Unlike the fixed-bed reactors used for gas-phase catalysis, polyester synthesis requires a Stirred Tank Reactor (STR) designed for intensive mass transfer and heat management.\u003c\/p\u003e\n\u003cp\u003eBecause the viscosity of the melt increases exponentially as the degree of polymerization (DP) rises, the mechanical stirring system is the most critical component. (1) \u003cstrong\u003eImpeller\u003c\/strong\u003e \u003cstrong\u003eTypes\u003c\/strong\u003e: In early phase, standard turbines or anchors are sufficient for mixing low-viscosity monomers. Later on, the High-viscosity \"Helical Ribbon\" or \"Anchor\" impellers are required to ensure axial flow and prevent stagnant \"dead zones\" near the reactor walls. (2) \u003cstrong\u003eMechanical Seal\u003c\/strong\u003e: A double-mechanical seal with a pressurized barrier fluid is standard. This prevents air ingress (which causes oxidative yellowing of the polyester) and ensures the system can maintain the deep vacuum required in the final stages of the reaction. (3) \u003cstrong\u003eTorque Monitoring\u003c\/strong\u003e: The motor is often equipped with a torque sensor. Since viscosity is proportional to torque, this serves as a real-time proxy for the molecular weight of the polymer.\u003c\/p\u003e\n\u003cp\u003ePolyesterification is typically an endothermic process initially, requiring significant heat, but temperature control is vital to prevent thermal degradation. (1) \u003cstrong\u003eHeating Method\u003c\/strong\u003e: A jacketed vessel using high-temperature thermal oil (e.g., Dowtherm) is preferred over direct electric heating for better temperature uniformity. (2) \u003cstrong\u003eReflux \u0026amp; Condensing\u003c\/strong\u003e: The reactor must be equipped with a distillation column. In the first stage (esterification), water or methanol (the by-products) must be removed to drive the equilibrium forward:\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"height: 201.2px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 35.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eEYPESRMSS (EY-PESRMSS)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.9856%;\"\u003e\u003cem\u003ePower\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%;\"\u003e\n\u003cul\u003e\n\u003cli\u003eAC110-220V±10%, single phase, 50\/60Hz, 2000 W \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 35.6px;\"\u003e\u003cem\u003eKey Features for Polyester Synthesis Reactor\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 35.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003e7\" HMI touch screen for monitoring (PID), RS485 communication port for computer connection. \u003c\/li\u003e\n\u003cli\u003eReactor Material: SS316L (other materials, such as Ti, Hastelloy can be supplied upon request)\u003c\/li\u003e\n\u003cli\u003eReactor Volume Options: 250mL, 500mL, 1L, 2L, and 5L\u003c\/li\u003e\n\u003cli\u003eOperation Temperature: ≤300 °C, adjustable, over-temperature alarm. Hybrid heating mechanism of electric and hot oil circulation\u003c\/li\u003e\n\u003cli\u003eHigh Pressure: ≤3 MPa (higher pressure up to 20 MPa can be customized and supplied upon request.)\u003c\/li\u003e\n\u003cli\u003eMechanical Stirring: 50-300 rpm \u003c\/li\u003e\n\u003cli\u003eThe SS316L impeller shapes (eg: spiral, frame) can be customized\u003c\/li\u003e\n\u003cli\u003eThe in-line reactant addition system provides accurate material feeding for polyester synthesis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 17.9856%;\"\u003e\u003cem\u003eCertification\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%;\"\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cul\u003e\n\u003cli\u003eCE certified\u003c\/li\u003e\n\u003cli\u003eUL and CSA certification is available upon request at extra cost\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acs.iecr.6b03260\"\u003eM. Lomelí-Rodríguez, et al., Optimum Batch-Reactor Operation for the Synthesis of Biomass-Derived Renewable Polyesters,  Ind. Eng. Chem. Res. 2017, 56, 2, 549–559\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.nature.com\/articles\/s41467-022-31352-x\"\u003eA. Gaikwad, et al., Kinetics and Dynamics of Enzymatic Degradation of Synthetic Polyester (PET) in Batch and Continuous Reactors, Ind. Eng. Chem. Res. 2026, 65, 11, 5913–5926\u003c\/a\u003e.\u003c\/p\u003e","brand":"YZYQ","offers":[{"title":"250 mL","offer_id":47633125081318,"sku":"EYPESRMSS250","price":8888888.0,"currency_code":"USD","in_stock":true},{"title":"500 mL","offer_id":47633125114086,"sku":"EYPESRMSS500","price":8888888.0,"currency_code":"USD","in_stock":true},{"title":"1 L","offer_id":47633125146854,"sku":"EYPESRMSS1000","price":8888888.0,"currency_code":"USD","in_stock":true},{"title":"2 L","offer_id":47633125179622,"sku":"EYPESRMSS2000","price":8888888.0,"currency_code":"USD","in_stock":true},{"title":"5 L","offer_id":47633125212390,"sku":"EYPESRMSS5000","price":8888888.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/EYPESRMSS_main.png?v=1778093739","url":"https:\/\/echemsupplies.com\/products\/eypesrmss","provider":"EChem Supplies","version":"1.0","type":"link"}