Tổng Hợp Thuốc Diệt Cỏ Glyphosate

Hoạt chất diệt cỏ được sử dụng rộng rãi nhất thế giới

Agriculture & Fertilizers Global Industrial Scale $6 billion

Tổng quan

Glyphosate (N-(phosphonomethyl)glycine) is the most widely used herbicide globally, originally developed and marketed by Monsanto as Roundup. It works by inhibiting the enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) in the shikimate pathway, which is essential for aromatic amino acid synthesis in plants but absent in animals. Glyphosate's use expanded dramatically with the introduction of genetically modified glyphosate-resistant crops (Roundup Ready) in 1996. The herbicide went off patent in 2000, and China now produces over 60% of global supply.

Quy trình hóa học

The predominant industrial route (IDA pathway) reacts iminodiacetic acid (IDA) with formaldehyde and phosphorous acid. IDA is produced from glycine and formaldehyde via a Strecker-like reaction, then phosphonomethylated. Alternatively, the glycine route (Monsanto process) uses DEPA (diethyl phosphite), formaldehyde, and glycine. The product is purified and formulated as the isopropylamine salt (IPA) for liquid products.

HN(CH2COOH)2 + HCHO + H3PO3 ->[catalyst] (HOOC-CH2)N(CH2PO(OH)2)(CH2COOH) -> HOOC-CH2-NH-CH2-PO(OH)2 + HCOOH (IDA route, oxidative decarboxylation)

Nguyên liệu thô

  • Iminodiacetic acid (IDA, HN(CH2COOH)2) — Reaction of glycine with formaldehyde and HCN (Amine backbone)
  • Phosphorous acid (H3PO3) — Hydrolysis of phosphorus trichloride (Phosphorus source)
  • Formaldehyde (HCHO) — Methanol oxidation (Methylenating agent)

Sản phẩm cuối

  • Glyphosate IPA salt (C3H8NO5P) — Non-selective systemic herbicide (Formulated as 360-480 g/L aqueous concentrate)
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Environmental Impact

Glyphosate degrades in soil with a half-life of 2-215 days (median ~47 days) primarily through microbial metabolism. AMPA (aminomethylphosphonic acid) is the primary degradation product. Glyphosate has been classified as 'probably carcinogenic' (IARC Group 2A) though regulatory agencies (EPA, EFSA) have generally concluded it is unlikely to be carcinogenic at typical exposure levels. The debate remains highly contentious.

Lưu ý an toàn

Đổi mới gần đây

Newer herbicide formulations replace POEA surfactant with less toxic alternatives.
Precision agriculture and robotic weed control reduce herbicide application volumes.
Gene-edited crops with novel herbicide tolerances may diversify weed management options.

Quy mô sản xuất

800000

tấn/năm

$6 billion

giá trị thị trường

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Frequently Asked Questions

What industry uses Tổng Hợp Thuốc Diệt Cỏ Glyphosate?
Tổng Hợp Thuốc Diệt Cỏ Glyphosate is used in the agriculture & fertilizers sector at global industrial scale scale.
What process is involved in Tổng Hợp Thuốc Diệt Cỏ Glyphosate?
The predominant industrial route (IDA pathway) reacts iminodiacetic acid (IDA) with formaldehyde and phosphorous acid. IDA is produced from glycine and formaldehyde via a Strecker-like reaction, then phosphonomethylated. Alternatively, the glycine route (Monsanto process) uses DEPA (diethyl phosphit
What is the economic significance of Tổng Hợp Thuốc Diệt Cỏ Glyphosate?
Tổng Hợp Thuốc Diệt Cỏ Glyphosate has a market value of $6 billion and annual production of 800,000 tons.
What is the environmental impact of Tổng Hợp Thuốc Diệt Cỏ Glyphosate?
Glyphosate degrades in soil with a half-life of 2-215 days (median ~47 days) primarily through microbial metabolism. AMPA (aminomethylphosphonic acid) is the primary degradation product. Glyphosate has been classified as 'probably carcinogenic' (IARC Group 2A) though regulatory agencies (EPA, EFSA)
What raw materials are used in Tổng Hợp Thuốc Diệt Cỏ Glyphosate?
The main raw materials include: Iminodiacetic acid (IDA, HN(CH2COOH)2), Phosphorous acid (H3PO3), Formaldehyde (HCHO).