A 2008 study reported a way to make primary amines directly from alcohols and ammonia using a ruthenium catalyst. The reaction was described as operating under relatively mild conditions and eliminating water. Those features motivated the researchers’ “greener” framing, but the report does not establish a quantified environmental advantage or industrial adoption.
What the reaction does
The method joins an alcohol with ammonia to form a primary amine, a class of compounds used in chemical synthesis. The catalyst is a ruthenium(II) complex supported by a tridentate pincer ligand. Water is identified as the eliminated byproduct.
As an Amazon Associate I earn from qualifying purchases.
The selectivity matters because alcohols and ammonia can undergo further alkylation, producing secondary or tertiary amines as well as the desired primary amine. Chemistry World’s 2008 account described this as a challenge in conventional industrial reactions at that time; it is not a survey of current industrial practice. Chemistry World, 22 October 2008.
How the authors proposed it works
The mechanism was not fully clear in the report. The researchers proposed a sequence in which the alcohol is oxidized to an aldehyde, which reacts with ammonia to form a hemiaminal. Loss of water could then produce an imine, followed by catalyst-mediated reduction to the primary amine. This is the authors’ proposed pathway, not a mechanism established conclusively by the cited account.
#1 Best Overall
- High Purity Amine: Alliance Chemical provides Monoethanolamine (MEA) with consistent purity, ideal for demanding industrial solvent applications.
- Gas Treatment Essential: A primary liquid absorbent for acidic gases, MEA is a standard for scrubbing operations in gas refineries and laboratories.
- PH Regulation: Often utilized alongside caustic soda for water treatment and industrial processes requiring precise pH control and buffering.
- Versatile Manufacturing: MEA is a key intermediate for producing detergents, emulsifiers, and polishes, similar to high-grade industrial ammonia.
- Quality Packaging: Our 32 fl oz quart bottle is designed for safety and durability, ensuring secure transport for professionals and industries.
Why the researchers called it greener
David Milstein described selective formation of primary amines from alcohols and ammonia, with water elimination and relatively mild conditions, as desirable for economic and environmental reasons. That is the researcher’s assessment of the reaction’s potential. The available report gives no comparative lifecycle assessment, quantified waste or energy measure, or evidence that the process has been adopted industrially. Water as the reported byproduct and relatively mild conditions are relevant process features, but they do not by themselves demonstrate an overall environmental benefit.
What was published
Chidambaram Gunanathan and David Milstein’s paper, “Selective Synthesis of Primary Amines Directly from Alcohols and Ammonia,” appeared in Angewandte Chemie International Edition in 2008, volume 47, pages 8661–8664. The group bibliography also lists patent records WO 2010/018570 A1 and US 8586742 B2 concerning ruthenium pincer catalysts for preparing amines from alcohols and ammonia. Those listings do not establish the patents’ current status, commercial availability, or industrial use. Organometallics and Catalysis Group, NISER publications bibliography.
Rank #2
- Triethanolamine (TEA) is used primarily in making surfactants, such as emulsifiers. It is a common ingredient in formulations used for both industrial and personal care products.
- Triethanolamine (TEA) is used in many cosmetic products to help balance pH levels, as well as to act as a cleansing base.
- Triethanolamine (TEA) is an organic compound composed of a tri-alcohol & and an amine.
- Triethanolamine Balances pH and can neutralize formulations.
- As an emulsifier or stabilizer, Triethanolamine helps emulsions, such as creams and lotions.
What the report does not establish
- A numerical environmental advantage over other amination methods.
- Comparative conversion, isolated yield, catalyst loading or recovery, metal residue, or scale-up performance.
- Current commercial production or availability of the catalyst or process.
These are important measures for deciding whether a promising laboratory reaction is practical at scale. The cited report does not provide enough comparative data to rank this route against alternatives.
Quick Recap
Best Value
- Triethanolamine (TEA) is used primarily in making surfactants, such as emulsifiers. It is a common ingredient in formulations used for both industrial and personal care products.
- Triethanolamine (TEA) is used in many cosmetic products to help balance pH levels, as well as to act as a cleansing base.
- Triethanolamine is an organic compound composed of a tri-alcohol & and an amine.
- Triethanolamine Balances pH and can neutralize formulations.
- As an emulsifier or stabilizer, Triethanolamine helps emulsions, such as creams and lotions.
Rank #3
- High purity Monoethanolamine (MEA) provides consistent results for technical applications, industrial processes, and use as research chemicals.
- Essential for gas treatment and refinery scrubbing operations, MEA effectively acts as an absorbent for acidic components in industrial systems.
- Versatile for soap making and manufacturing detergents, emulsifiers, and polishes, serving as a reliable industrial degreaser component.
- Ideal for use as lab chemicals and chemical reagents in controlled environments, supporting complex chemical synthesis and resin production.
- Alliance Chemical ensures secure shipping of this 1 gallon (4 quarts) quantity in durable, leak-proof containers for professional handling.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
