The process of molecular sieves is something we need to know. Introduce the production process of carbon molecular sieve. Carbon molecular sieve raw material powder is the main raw material for the production of molecular sieve active powder. The raw material powder of molecular sieve has the skeleton characteristics of molecular sieve, but its pore is filled with a lot of water molecules, so it can be used directly. Only most of the water in the channel is activated by high temperature. After drainage, it can be used to adsorb other molecules.
The production process of raw powder mainly includes five stages: preparation of sodium aluminate, synthesis, aging crystallization, separation washing of mother liquor, drying packaging. Add sodium hydroxide to the temperature of aluminum hydroxide, then heat the solution to prepare aluminum hydroxide at the reaction temperature. Aluminum hydroxide solution was prepared under the condition of preparing sodium aluminate. After the preparation, the mother liquor was added to adjust the concentration of sodium aluminate solution to meet the raw material requirements for the synthesis of molecular sieve raw material powder. The sodium aluminate solution filtered by two steps is used to synthesize the raw material powder of molecular sieve.
Synthesis: there are six substances in the synthesis part, which are alkali liquor, sodium aluminate, mother liquor, sodium silicate, water directing agent. Six kinds of materials were added to the synthesis tank according to the production process proportion, the reaction was stirred for about 1 hour.
Aging crystallization: after the slurry is stirred in the synthesis tank, it is pumped into the crystallization tank, heated by steam under stirring, the heating temperature, aging crystallization time are controlled according to the process requirements. The discharge is mixed into the buffer tank.
Separation washing of mother liquor: the solid-liquid slurry is separated through a filter to collect filtrate. When the water reaches 30-32% of the attached water, the air pressure stops the filter cake enters the filter cake turnover box.