Like organic raw materials that can easily be found in the environment
Festus
You can prepare them starting from ethylene. First you oxidize ethylene to ethylene oxide. Reaction of ethylene oxide with NH3 provides triethanolamine. For the 1st step see
---Carlin, D. A. et al Chemical Communications (Cambridge, United Kingdom), 51(12), 2283-2285; 2015
---Kwong, Hoi-Ki et al Chemical Communications (Cambridge, United Kingdom), 47(14), 4273-42
---Gao, Shuang et al Faming Zhuanli Shenqing, 104693147, 10 Jun 2015
For the 2nd step see
---Kassovitz, Toma and Ciomag, Maria Rom., 114610, 30 Jun 1999
---Morishita, Fumiaki et al Eur. Pat. Appl., 1443036, 04 Aug 2004
---Mauvezin, Mathias et al Fr. Demande, 2856399, 24 Dec 2004
Ehylene->Triethanolamine Commercial Source Information
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Good luck