– High-Purity Phenol from Complex Streams
Our crude phenol purification technology efficiently processes phenol-rich streams from cumene-to-phenol or coal chemical routes. The technology removes key impurities including acetone, alpha-methylstyrene, hydroxyacetone, and various color-forming compounds to produce high-purity phenol.
We employ a combination of distillation sequences, extractive treatment, and ion exchange resin systems. Our process design includes light-ends removal, heavy-ends separation, and targeted impurity treatment steps. Advanced column internals and optimized reflux ratios ensure sharp separations with minimal phenol losses.
What distinguishes our technology is the ability to achieve phenol purity exceeding 99.9% and melting point above 40.5°C, meeting the most stringent specifications for polycarbonate, epoxy resin, and phenolic resin production. The system operates with high recovery yields, low energy consumption, and extended on-stream time between regenerations.
Whether you need to debottleneck an existing phenol plant or build a new purification unit, our proven technology delivers consistent product quality and operational reliability.
Phenols have a variety of compounds, with the most important ones incl. phenol(carbonic acid), and cresol(o-cresol, m-cresol and p-cresol); among them, phenol is mainly used as the feedstock for di-phenol A production and phenol formaldehyde production; o-cresol is widely used in the synthesis of resin, pesticide, medicine, perfume, dyes, antioxidant and etc.; m-cresol is an very important feedstock for the production of Vitamin E; p-cresol is widely applied in the synthesis of BHT, the most employed antioxidant in the world. SL TEC offers the technology of crude phenol purification with the phenol either from coking phenol, or gasified phenol or alkylation liquid. Based on the facts that the boiling points of the main product and the by-products are quite different @ certain condition and the boiling points will decrease with the reducing of the pressure, SL TEC's technology lowers the separation temperature by reducing the system system, distill, separate and purify to get high purity phenol separately.
In the traditional crude phenol purification process, usually water removing, residue removing, phenol purification units in batch are involved to separate and purify phenol, cresol and other products. In this batch production, the intermediate distillate between adjacent components requires repeated rectification to increase the yield, thereby the productivity is low, the energy consumption is low and only suitable for small production capacity; in addition, as the phenol products have certain heat sensitivity, the repeated heating not only decreases the total yield but also results in the unstable product quality. While SL TEC provides a technology based on the achievements by cooperation with Tianjin University. It is based on continuous vacuum distillation, uses DCS control system to optimize operation. Its advantages include the followings:
1. The yield and the product quality is obviously advanced.
2. Thks to the auto-protection and chain shutdown system, the production is very stable, the product quality is also stable and the production flexibility is big.
3. It successfully separates sulfuric acid and heavy components phenol to realize the 100% recovery of sulfuric acid, thereby the consumption is largely redyced; meanwhile graphite reactor and glamel reaction equipment are employed, which avoids the corrosion of sulfuric acid catalyst to the equipment and therefore decreases the equipment investment.
Room 908, Building 6, Jiaye Fortune Plaza, Jinrong 3rd Street, Binhu District, Wuxi 214000, Jiangsu, China.
