92results about How to "Good solubility and dispersibility" patented technology

The invention discloses a synthesis method of an MCM-22 family molecular sieve. The method is characterized by comprising the steps of: adding a dilute acid water solution into a hexamethyleneimine template agent; adding a silicon source, an aluminium source, an alkali source, water and an acidified template agent (R) in proportion so as to prepare gel; conducting hydrothermal crystallization, opening a valve under constant temperature, carrying out pressure reduced evaporation to the molecular sieve slurry, recovering the liquid mixture and the template agent; adding a cold dilute acid watersolution into the residual slurry, and opening the kettle when the temperature of the residual slurry drops below 50DEG C, performing filtration so as to obtain a solid product, thus obtaining a MCM-22 family molecular sieve finally. With the method provided in the invention, the template agent no longer volatizes, and damage to the human body can be avoided. Meanwhile, stability of the synthesisformula and quality of the molecular sieve is guaranteed. When the template agent is acidified into a salt, the dispersibility is greatly increased, and the obtained MCM-22 family molecular sieve hasa uniform crystal phase as well as a high degree of crystallization. After crystallization, the synthesis slurry is subjected pressure reduced evaporation and the template agent is recovered. After acidification, the recovered template agent can be used for MCM-22 family molecular sieve synthesis again.