A kind of preparation method of alkane adsorption separation material
An adsorption separation material and adsorption material technology, which is applied in the field of preparation of alkane adsorption and separation materials in light oil products, can solve the problem of unseparated naphtha rich in alkane components, rich in non-alkane components reported in literature, normal structure The ratio of alkanes to non-normal hydrocarbons cannot be well adapted to the requirements of the amount of raw materials, etc.
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[0035] The invention provides a preparation method of the above-mentioned adsorption material.
[0036] The preparation method of the present invention may include a step of synthesizing an adsorption material: providing a mixture containing an aluminum source solution, a silicon source solution and a template, and then forming an adsorption material after gelling, aging, crystallization, washing and activation ; Wherein, the ratio of silicon to aluminum in the aluminum source solution and the silicon source solution is 40-200.
[0037] Before the step of synthesizing the adsorption material, a compounding step may also be included: providing an aluminum source solution and a silicon source solution respectively.
[0038] The aging may be aging the previously treated mixture at a certain temperature (such as about 25°C) for a certain period of time (such as 24-48h).
[0039] The crystallization can be performed by moving the previously treated mixture into a crystallization t...
Embodiment 1
[0082] Using silica sol as the silicon source, prepare a silicon source aqueous solution with a mass concentration of 30%, aluminum sulfate as the aluminum source, prepare an aluminum source aqueous solution with a concentration of 0.03mol / L, the silicon-aluminum ratio is 60, and the pH is 10. The synthesized template The agent is tetrapropylammonium hydroxide, and the dosage is 5%. The aging time of molecular sieve synthesis is 24h, the crystallization time is 30h, and the crystallization temperature is 120°C. Cool naturally, filter with suction, wash until neutral, and activate at 550°C for 4 to 6 hours after drying to obtain a molecular sieve sample.
[0083] The binder for forming the molecular sieve is an aqueous solution of silica sol (concentration is 30%), the forming auxiliary is scallop powder, and the adhesive is nitric acid. The amount of binder is 5%, the amount of molding aid is 3%, and the concentration of adhesive is 3%. After extrusion molding, a bar-shaped ...
Embodiment 2
[0088] Using sodium silicate as the silicon source, prepare a silicon source aqueous solution with a mass concentration of 30%, sodium metaaluminate as the aluminum source, prepare an aluminum source aqueous solution with a concentration of 0.03mol / L, the silicon-aluminum ratio is 200, and the pH is 11. The templating agent is a mixture of organosilane and ethanolamine (mass ratio 1:1), and the dosage is 10%. The aging time of molecular sieve synthesis is 48h, the crystallization time is 60h, and the crystallization temperature is 200°C. Cool naturally, filter with suction, wash until neutral, and activate at 550°C for 4 to 6 hours after drying to obtain a molecular sieve sample.
[0089] The binder for molecular sieve molding is a mixture of sodium silicate aqueous solution and pseudo-boehmite (the concentration of sodium silicate aqueous solution is 30%; the mass ratio of sodium silicate aqueous solution and pseudo-boehmite is 1:1), and the forming aid The agent is a mixtur...
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