After-treatment technology of Beckmann gas-phase rearrangement S-1 full-silica molecular sieve based catalyst

The invention discloses an after-treatment technology of a Beckmann gas-phase rearrangement S-1 full-silica molecular sieve based catalyst, which comprises the following steps of: preparing a mixed solution of strong acid with a certain concentration and hydrofluoric acid in proportion, weighing a certain mass of S-1 full-silica molecular sieve based catalyst and putting into a reactor, measuringout the prepared mixed solution of strong acid and hydrofluoric acid based on the mass of the catalyst and pouring into the reactor, starting stirring, maintaining a certain rotation speed, stopping stirring after reacting for a period of time at room temperature, and washing by using de-ionized water to be neutral. According to the invention, By changing the formula of an S-1 full-silica molecular sieve after-treatment solution and using the mixed solution of strong acid and hydrofluoric acid as an after-treatment solution, the after treatment is carried out at room temperature dropping fromabout 100 DEG C in conventional processes, the problem that the material of a heat exchanger must be made of an expensive Monel metal due to strong corrosivity of the hydrofluoric acid in the conventional after-treatment process is solved, and equipment cost is substantially saved.