System for preparing 3-hydroxy-4-methoxycinnamaldehyde based on mother liquor

By combining a system of a freeze crystallizer, centrifuge, mother liquor collection tank, distillation water recovery tank and condenser, the problem of low yield of 3-hydroxy-4-methoxycinnamate was solved, achieving efficient recovery and improved purity, and reducing production costs and environmental pollution.

CN224628457UActive Publication Date: 2026-08-14NINGXIA WANXIANGYUAN BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521537870.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-22
Publication Date
2026-08-14
Estimated Expiration
2035-07-22

AI Technical Summary

Technical Problem

In existing technologies, the yield of 3-hydroxy-4-methoxycinnamicaldehyde is low, and about 3%-5% of the product in the mother liquor cannot be fully crystallized or completely separated, resulting in a decrease in product yield and an increase in wastewater treatment load and cost.

Method used

A system for preparing 3-hydroxy-4-methoxycinnamicaldehyde based on mother liquor is adopted, including a freeze crystallization kettle, a centrifuge, a mother liquor collection tank, a water distillation recovery kettle, and a condenser. The system achieves efficient recovery of 3-hydroxy-4-methoxycinnamicaldehyde from the mother liquor through freeze crystallization, centrifugal separation, vacuum distillation, and condensation.

Benefits of technology

It significantly improved the purity and yield of 3-hydroxy-4-methoxycinnamaldehyde crystals, reduced mother liquor residue, lowered wastewater treatment load and costs, and improved production efficiency.

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Abstract

This utility model relates to the field of compound preparation technology, specifically to a system for preparing 3-hydroxy-4-methoxycinnamicaldehyde based on mother liquor. The apparatus includes: a cryo-crystallization vessel, a centrifuge, a mother liquor collection tank, a water recovery vessel, a condenser, and a mother liquor water collection tank. The cryo-crystallization vessel freezes and crystallizes a reaction mixture containing 3-hydroxy-4-methoxycinnamicaldehyde, then centrifuges it to obtain mother liquor and 3-hydroxy-4-methoxycinnamicaldehyde crystals. The mother liquor is collected and then passed into the water recovery vessel for vacuum distillation. The distillate from the water recovery vessel is condensed by the condenser and sent to the mother liquor water collection tank. The second outlet of the water recovery vessel is connected to the inlet of the cryo-crystallization vessel to transfer the residual liquid from the water recovery vessel to the cryo-crystallization vessel for further cryo-crystallization, followed by centrifugation to obtain 3-hydroxy-4-methoxycinnamicaldehyde crystals.
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