93983-16-5

Usage

Appearance

Clear, colorless liquid

Odor

Mild, pleasant

Solubility

Soluble in water and most organic solvents

Usage in industries

Commonly used in cosmetic and personal care industries

Functions

Solvent, emulsifier, and stabilizer

Applications

Skincare, haircare products, and some pharmaceutical formulations

Benefits

Improves texture and spreadability, enhances penetration of active ingredients, maintains product stability

Safety

Relatively safe for use in cosmetics and personal care products at low concentrations

Precaution

High concentrations may cause skin irritation, use with caution

Upstream product

• 50-00-0 formaldehyd 
• 123-72-8 butyraldehyde 
• 922-63-4 ethylacrolein 

Relevant academic research and scientific papers

METHOD FOR PRODUCING DITRIMETHYLOLPROPANE

The present invention provides a method for producing ditrimethylolpropane which is characterized by the following (1) and (2): (1) a distillation still residue separated from purified trimethylolpropane is subjected to re-distillation under specific conditions to obtain a ditrimethylolpropane-containing solution having given contents of bis-TMP and tri-TMP; and (2) when subjecting the ditrimethylolpropane-containing solution to crystallization with an organic solvent, the crystallization is initiated under pressure at a temperature exceeding a boiling point of the organic solvent as measured under normal pressures, and the resulting crystallization product solution is cooled at a temperature drop rate of 2° C./min or less. According to the above method, it is possible to produce a high-purity ditrimethylolpropane from a distillation still residue obtained upon production of trimethylolpropane in a simple, industrially useful manner.

Method for producing ditrimethylolpropane

In the method of producing ditrimethylolpropane of the present invention, the distillation still residue obtained in the production of trimethylolpropane is subjected to crystallizing treatment while strictly regulating the amount of organic solvent to be used, the crystallization temperature and the crystallization time within the specific ranges. With the method of the present invention, a highly pure di-TMP is obtained only by a single operation of the crystallization.

Process for recovering ditrimethylolpropane

The present invention provides processes for recovering ditrimethylolpropane from a still residue obtained by extracting and then distilling off trimethylolpropane from a reaction solution obtained by reacting n-butyraldehyde with formaldehyde in the presence of a basic catalyst.One process comprises acid decomposition of formals in the still residue.A second process comprises removal from the still residue of components having a higher boiling point than that of ditrimethylolpropane followed by crystallization of the resultant product.