Dipentaerythritol

Packing:25kg or 50kg or ton bag into pallets.

Specification:  CAS NO.:126-58-9

Appearance:white crystal powder Assay： 99.00 min. by HPLC IR Identity: conform to standard HNMR： conform to standard carbon spectrum: conform to standard Water by K. F.:0.5% max or as per the customer’s request Loss on drying:0.5% max. or as per the customer’s request

Used mainly in

Production of polyethers, polyesters, and polyurethanes: used as multifunctional monomers for synthesizing high-performance polymers.

High end paint industry: Improve paint film hardness, durability, and environmental resistance.

Plastic plasticizers and stabilizers: improve the flexibility, strength, and thermal stability of plastics.

Pharmaceutical intermediates and fine chemicals: used for synthesizing active pharmaceutical ingredients (APIs) and other specialty chemicals

producing alkyd resin and photosensitive resin films: as key components in coatings, inks, and photosensitive materials.

Synthesis lines:

According to authoritative patent literature, the typical synthesis method of dipentaerythritol is as follows:

Raw material: Pentaerythritol  is the main raw material.

First stage reaction:

Add ethylene carbonate and tetra-n-butoxytitanium (Organics TA-25) as catalysts.

React for 11 hours at 140-170 ℃and 0.055-0.0001 MPa to remove the generated ethylene glycol and unreacted ethylene carbonate.

Second stage reaction:

Supplement with pentaerythritol and add boron trioxide and sodium formate as co catalysts.

Heat up to 190 ℃and continue the reaction for 3 hours at 0.097 MPa.

Product separation: Obtaining high-purity dipentaerythritol through crystallization or distillation.

This method has high selectivity and yield, and is suitable for industrial production