| 摘要 |
PURPOSE: To produce fine particles uniform in particle size distribution by passing a soln. or a suspension and a soln. of a different nature through respective pipelines and colliding the solns. with each other in a collision chamber. CONSTITUTION: The respective aq. soln. and org. solvent soln. in a feed tanks 2 with a jacket kept at a constant temp. by a heating and cooling device 1 are mixed by pumps 3 through a pneumatic three-way valve 4 and a check valve 5. At this time, the excess solns. are returned to the feed tanks 2 through a circulating line 6, and the solns. are stably supplied. The liq. mixture is sent to a high-pressure pump 10 after adjusting the supply amount by a needle valve 9. The liq. mixture pressurized by the pump 10 is sent to a collision chamber 12 through a filter 11 and separated into two liqs. in the chamber 12. The two liqs. are collided with a flat part in a flow passage or with each other at a mutual pressure of >=300kg/cm<2> , and a fine particle is produced. The obtained particle-contg. liq. is cooled by a cooler 13 and recovered. |
