SELF-BALANCED HIGH-PRESSURE AND HIGH-SHEAR AUTOCLAVE AND THE APPLICATION IN THE PREPARATION OF LAYERED DOUBLE HYDROXIDES

摘要

The present invention belongs to the synthesis technology field of inorganic functional materials, and particularly provides a self-balanced high-pressure and high-shear autoclave and its application in the preparation of layered double hydroxides (LDHs). In this invention, by imbedding the handpiece of emulsification mill into the autoclave, and by taking the motor driving system outside of the autoclave, the pressure of the autoclave can be highly stable by the use of self-balanced seal gland. These characters solve the problem that the typical emulsification mill cannot be used in high-pressure system, and ensure the crystallization under the high-pressure and high-shear conditions. Such autoclave takes the advantages of additional equipment, and eliminates the volume effect in the amplification process. By the use of this new autoclave, the reaction time can be shorten from 24 hours to 2-6 hours, the reaction temperature can be reduced from 180° C. to 140° C. The LDHs products with small particle size and narrow size distribution are obtained. These results are better than those prepared at the laboratory level.

主权项

1. A self-balanced high-pressure and high-shear autoclave, wherein: the handpiece of emulsification mill is placed into the autoclave; the top of the autoclave is self-balanced seal gland, which is composed by the self-propelled surge tank with a isolation-type piston and sealing layer; the coupling shaft of the high-shear emulsification mill can get into the autoclave through seal gland; the bottom of the coupling shaft connect the handpiece, which is away from the bottom of the autoclave with ⅕-½ of the whole height; the top of the coupling shaft connect the motor driving system, which is located outside of the autoclave; the coupling shaft is based on sleeve, the outer shaft is based on the connection of dead axis and stator in handpiece, and the inner shaft is based on the connection of rotation axis and rotor in handpiece.