Trimethylolpropane,CAS 77-99-6

Trimethylolpropane is a Colorless, hygroscopic crystals. Soluble in water and alcohol. Combustible.The three primary hydroxyl groups undergo the normal OH group reactions.

DryPowder; Liquid; OtherSolid; PelletsLargeCrystals; PelletsLargeCrystals, Liquid|COLOURLESS-TO-WHITE HYGROSCOPIC CRYSTALS OR PELLETS.

Trimethylolpropane Use and Manufacturing
Methods of Manufacturing
N-butyraldehyde and formaldehyde in alkaline conditions for aldol condensation reaction, the reaction solution by concentration and desalination, and then ion exchange resin decolorization, purification, and finally evaporate with a thin film evaporator, cooling, rolling, the finished product. Raw material consumption quota: n-butyraldehyde (≥ 95%) 950kg / t, formaldehyde (37%) 3400kg / t. Refining method: General distillation with vacuum distillation. As the production of sodium formate mixed with easy pyrolysis, the need to use ion exchange resin to remove, and in the distillation by adding ammonium salt, hydroquinone or α-naphthol as a stabilizer. For further refinement, available ether ether acetone (1 : 1) to recrystallize. The triadimine as the catalyst of the condensation disproportionation method is n-butyraldehyde and formaldehyde as raw materials to triethylamine as a catalyst for aldol condensation reaction to produce 2, 2 - dimethylol butyraldehyde, and then with excess formaldehyde And alkali reaction occurs in the formation of trimethoprim propane, trimethylol propane, amine salt decomposition recovery catalyst triethylamine, and then in the distillation column to be trimethylol propane. The reaction is as follows: Condensation Hydrogenation With n-butyraldehyde and formaldehyde as raw materials, trihydroxyethylaldehyde is synthesized by using triethylamine as the catalyst to form 2, 2-dimethylolbutylaldehyde, and then catalyzed hydrogenation to produce trimethylolpropane , And the reaction solution after hydrogenation was distilled under reduced pressure to give trimethylolpropane. Hydrogenation catalyst is generally divided into two categories: one is palladium carbon catalyst, the reaction conditions are mild, the general reaction temperature is 140 ℃, the reaction pressure is 0.98MPa, but the price is more expensive; the other is copper catalyst, carrier γ  aluminum oxide, the operating conditions for the reaction temperature of 130 ℃, pressure 3.0MPa.

Uses
Conditioning agent, manufacture of varnishes, alkylated resins, synthetic drying oils, urethane foams & coatings, silicone lube oils, lactone plasticizers, textile finishes, surfactants, epoxidation products.

Adhesives and sealant chemicals

Adhesives and sealants