A kind of preparation method of solid powdery potassium oleate

Abstract

The invention discloses a solid powdery potassium oleate preparation method. The preparation method comprises the steps: reacting pasty oleic acid and potassium hydroxide in a water phase to prepare out a potassium oleate solution and concentrating under condition of 70 to 80 DEG C to prepare out flowable thick potassium oleate; mixing urea with an alcohol solution, stirring under condition of 70 to 90 DEG C and forming a thermal saturated urea-alcohol solution after the urea is completely dissolved; adding the thick potassium oleate into the urea-alcohol solution under a thermal-insulation state, fully stirring to form an even transparent solution, keeping stirring, cooling to -5 to 0 DEG C, keeping low temperature for 1 to 3h to separate the potassium oleate out, filtering the separated-out hard potassium oleate powder and blowing solid part by dry and cold air to obtain finished product of solid powdery potassium oleate. According to the preparation method disclosed by the invention, high-purity solid powdery potassium oleate hardly containing any moisture is prepared by a urea adduction method, excellent water solubility of the urea and the alcohol and effumability of the alcohol are utilized, the saturated urea-alcohol solution is utilized to absorb moisture in the potassium oleate, and finally the solid loose powdery potassium oleate is obtained.

Description

Technical field [0001] The invention belongs to the technical field of preparation of potassium oleate, and specifically relates to a preparation method of solid powdered potassium oleate. Background technique [0002] Potassium oleate is usually prepared in the water phase by saponification reaction using animal oil or vegetable oil containing oleic acid. Due to the different quality of potassium oleate products, potassium oleate solution (potassium oleate content is less than 30%) is a colorless to light yellow viscous liquid, and pasty potassium oleate (potassium oleate content is 50%) is light yellow to light brown viscous silk liquid, paste potassium oleate (potassium oleate content is 70%-92%) is light yellow soft paste solid and potassium oleate particles (potassium oleate content is higher than 95%) are light yellow powder particles. Potassium oleate is a potassium catalyst and a trimerization catalyst for polyurethane rigid polyisocyanurate. It is widely used in polyur...

AI Technical Summary

Problems solved by technology

However, at present, the refining and purification of solid potassium oleate often requires the use of low temperature and reduced pressure to remove water. This method has a long production cycle, high energy consumption, high cost, and great difficulty in preparation.