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Technology Profile: Production Process for Neopentyl Glycol

By Intratec Solutions |

This column is based on “Neopentyl Glycol Production Process – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/neopentyl-glycol-production-cost. Neopentyl glycol (NPG; 2,2-dimethylpropane-1,3-diol) is an industrially important and versatile diol, mainly employed as a building block for polyesters and polyurethanes. NPG imparts desirable properties to its derivatives, including low color, good weathering and chemical resistance, and high thermal and hydrolytic stability. This glycol is a crystalline solid at room temperature that is highly reactive and colorless to white in color. It has good solubility in water, alcohols, ethers, ketones and toluene. As a typical glycol, it can undergo reactions such as esterification, etherification, condensation and oxidation. Figure 1. The diagram shows the production of neopentyl glycol via aldol addition and catalytic hydrogenation[/caption]   The process The process described here is an aldol reaction followed by hydrogenation (Figure 1). It comprises three major sections: (1) aldol condensation; (2) hydrogenation; and (3) purification. Aldol condensation. An aldol reactor is fed with an aqueous solution of formaldehyde, isobutyraldehyde…
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