Промышленный синтез витамина C (аскорбиновой кислоты)

От глюкозы до самого потребляемого витамина в мире

Food Processing & Preservation Global Industrial Scale $1.2 billion

Обзор

Vitamin C (L-ascorbic acid) is manufactured through the Reichstein process or its modern two-step fermentation variant, converting D-glucose into L-ascorbic acid via D-sorbitol. China produces over 80% of the world's supply. The original Reichstein process (1934) involves one fermentation step and multiple chemical steps, while the modern two-fermentation process replaces several chemical steps with a second microbial conversion, reducing waste and cost. Vitamin C is used as a food additive (antioxidant E300), dietary supplement, and pharmaceutical excipient.

Химический процесс

D-Glucose is catalytically hydrogenated to D-sorbitol using Raney nickel. D-Sorbitol is fermented by Gluconobacter oxydans to L-sorbose. In the Reichstein process, L-sorbose is converted to 2-keto-L-gulonic acid (2-KGA) via diacetone-sorbose protection and oxidation. In the modern process, a second fermentation with Ketogulonicigenium vulgare converts L-sorbose to 2-KGA directly. 2-KGA is lactonized with HCl to yield L-ascorbic acid.

D-Glucose + H₂ →[Ni] D-Sorbitol
D-Sorbitol →[G. oxydans] L-Sorbose
L-Sorbose →[K. vulgare] 2-Keto-L-gulonic acid
2-KGA →[HCl, heat] L-Ascorbic acid + H₂O

Сырьё

  • D-Glucose (C₆H₁₂O₆) — Corn starch hydrolysis (Starting material)
  • Hydrogen gas (H₂) — Steam methane reforming (Reducing agent (for sorbitol))
  • Gluconobacter oxydans — Culture collection (Fermentation organism (step 1))

Конечные продукты

  • L-Ascorbic acid (C₆H₈O₆) — Vitamin supplement, food antioxidant (E300), pharmaceutical (USP/EP/FCC grade, >99% purity)
<path stroke-linecap="round" stroke-linejoin="round" d="M12 9v3.75m-9.303 3.376c-.866 1.5.217 3.374 1.948 3.374h14.71c1.73 0 2.813-1.874 1.948-3.374L13.949 3.378c-.866-1.5-3.032-1.5-3.898 0L2.697 16.126zM12 15.75h.007v.008H12v-.008z" />

Environmental Impact

The Reichstein process uses acetone for protection steps, generating significant organic solvent waste. The two-fermentation route reduces chemical waste by approximately 40%. Raney nickel catalyst requires careful handling and regeneration. Chinese production dominance has raised concerns about environmental standards in manufacturing.

Соображения безопасности

Последние инновации

One-step fermentation processes using engineered microorganisms to convert glucose directly to 2-KGA or ascorbic acid are in development.
Electrochemical oxidation methods offer an alternative to biological oxidation steps with better controllability.

Масштаб производства

200000

тонн/год

$1.2 billion

Рыночная стоимость

Больше в Food Processing & Preservation

Производство глутамата натрия (MSG) методом ферментации

Global Industrial Scale

Производство лимонной кислоты ферментацией Aspergillus niger

Global Industrial Scale

Производство молочной кислоты для консервирования продуктов

Global Industrial Scale

Производство пищевой фосфорной кислоты

Global Industrial Scale

Рафинирование сахара и кристаллизация

Global Industrial Scale

Ферментативное производство кукурузного сиропа с высоким содержанием фруктозы (HFCS)

Global Industrial Scale

Ферментация этанола для напитков и промышленного использования

Global Industrial Scale

Frequently Asked Questions

What industry uses Промышленный синтез витамина C (аскорбиновой кислоты)?
Промышленный синтез витамина C (аскорбиновой кислоты) is used in the food processing & preservation sector at global industrial scale scale.
What process is involved in Промышленный синтез витамина C (аскорбиновой кислоты)?
D-Glucose is catalytically hydrogenated to D-sorbitol using Raney nickel. D-Sorbitol is fermented by Gluconobacter oxydans to L-sorbose. In the Reichstein process, L-sorbose is converted to 2-keto-L-gulonic acid (2-KGA) via diacetone-sorbose protection and oxidation. In the modern process, a second
What is the economic significance of Промышленный синтез витамина C (аскорбиновой кислоты)?
Промышленный синтез витамина C (аскорбиновой кислоты) has a market value of $1.2 billion and annual production of 200,000 tons.
What is the environmental impact of Промышленный синтез витамина C (аскорбиновой кислоты)?
The Reichstein process uses acetone for protection steps, generating significant organic solvent waste. The two-fermentation route reduces chemical waste by approximately 40%. Raney nickel catalyst requires careful handling and regeneration. Chinese production dominance has raised concerns about env
What raw materials are used in Промышленный синтез витамина C (аскорбиновой кислоты)?
The main raw materials include: D-Glucose (C₆H₁₂O₆), Hydrogen gas (H₂), Gluconobacter oxydans.