METHOD FOR THE DEHYDRATION OF DICHLORMETHANE, DIETHYL ETHER, ACETONE AND TETRAHYDROFURAN

摘要

The dichlormethane, diethyl ether, acetone and terahydrofuran are used in the pharmaceutical and chemical industries in different syntheses as reagents and solvents for laboratory purposes and in production. The method is carried out by absorption with thermal pretreated zeolite molecular screen where the capacity of the activity of the adsorbent is increased both under static and under dynamic conditions. Dehydration is carried out in two stages at room temperature and atomspheric pressure. In the first stage partially dehydrated solvent is fed with 0.1-5% water content from the preceding dehydration cycle, and in the subsequent stage technical solvent or a solvent produced during recycling with volume speed of 0.1-1.5 h-1 is fed. The zeolite regeneration occurs by washing with water and the supply of saturated steam. The water content in the dehydrated solvents is 0.005-0.2%. 1 claim