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Preparation method and device of molecular sieving membrane

A technology for preparing devices and molecular sieves, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The effect of improved performance, simple method and improved film uniformity

Active Publication Date: 2016-11-23
JIANGSU NINE HEAVEN HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the preparation process of the molecular sieve membrane in the prior art, the nutrient components of the membrane-forming solution are rapidly depleted and the membrane-forming solution will form a concentration gradient. Due to the problem of batch differences, the performance of the membrane is affected

Method used

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  • Preparation method and device of molecular sieving membrane
  • Preparation method and device of molecular sieving membrane
  • Preparation method and device of molecular sieving membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1: Preparation of seeded support

[0045] Such as figure 1 As shown, weigh 10 g of T-type molecular sieve seed crystals, disperse them in 990 g of deionized water, and place them in a seed crystal tank on a stirrer, stir and ultrasonically obtain molecular sieve seed crystal suspensions; fix them on the support The support body of the bracket is immersed in the seed crystal suspension for 5 seconds, and then the support body bracket is taken out, and the surface of the support body is coated with a seed crystal, and then put into an oven to dry, and set aside.

[0046] Step 2: Preparation of T-type molecular sieve membrane

[0047] Adding sodium metaaluminate to sodium hydroxide, potassium hydroxide and deionized water is fully stirred to form an aluminum solution, and after stirring, a membrane-making solution for preparing a T-type molecular sieve membrane is formed. The seeded support 12 is vertically fixed in the reactor 11, the membrane forming solution is a...

Embodiment 2

[0049] Step 1: Preparation of seeded support

[0050] Such as figure 1 As shown, weigh 10 g of T-type molecular sieve seed crystals, disperse them in 990 g of deionized water, and place them in a seed crystal tank on a stirrer, stir and ultrasonically obtain molecular sieve seed crystal suspensions; fix them on the support The support body of the bracket was immersed in the seed crystal suspension for 5 seconds, and then the support body bracket was taken out, and the inner film was used to form a seed crystal on the inner wall of the tubular support body, and then put into an oven to dry and set aside.

[0051] Step 2: Preparation of T-type molecular sieve membrane

[0052] Adding sodium metaaluminate to sodium hydroxide, potassium hydroxide and deionized water is fully stirred to form an aluminum solution, and after stirring, a membrane-making solution for preparing a T-type molecular sieve membrane is formed. The seeded support 12 is vertically fixed in the reactor 11, th...

Embodiment 3

[0054] The difference with embodiment 2 is: adopted such as figure 2 device shown.

[0055] Step 1: Preparation of seeded support

[0056] Such as figure 1 As shown, 10 g of T-type molecular sieve seed crystals were weighed, dispersed in 990 g of deionized water, and placed in a seed crystal tank on a stirrer, stirred and ultrasonicated to obtain a molecular sieve seed crystal suspension, and its seed crystal suspension The concentration is 10g / L; the support body fixed on the support body bracket is immersed in the seed crystal suspension for 5s, and then the support body bracket is taken out, and the inner film is used to form a seed crystal on the inner wall of the tubular support body, and then Place in the oven to dry and set aside.

[0057] Step 2: Preparation of T-type molecular sieve membrane

[0058] Adding sodium metaaluminate to sodium hydroxide, potassium hydroxide and deionized water is fully stirred to form an aluminum solution, and after strong stirring, a ...

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Abstract

The invention relates to a preparation method and device of a molecular sieving membrane and belongs to the technical field of preparation of molecular sieving membranes. The preparation method comprises the steps that S1, a seed crystal supporting body is prepared, molecular sieve seed crystals are evenly dispersed in deionized water to obtain molecular sieve seed crystal suspension liquid, the outer surface of the porous supporting body is coated with the molecular sieve seed crystals, and the supporting body is dried to obtain the seed crystal supporting body for standby application; S2, a molecular sieve membrane is prepared: the seed crystal supporting body obtained in the step is put in a molecular sieve membrane preparing solution environment for hydro-thermal synthesis, then a fresh membrane preparing solution is added to the membrane preparing solution periodically, parts of completely reacted membrane preparing solution are discharged, and the seed crystal supporting body is taken out after reaction is completed; water washing and drying are performed with deionized water to obtain the molecular sieving membrane. The problems of concentration gradient and nutrition exhausting of the membrane preparing solution caused by too long reaction time during molecular sieving membrane preparation are solved, and the molecular sieving membrane synthesized by the preparation method is high in repeatability and excellent in performance.

Description

technical field [0001] The invention relates to a preparation method and device of a molecular sieve membrane, belongs to the technical field of molecular sieve membrane preparation, and in particular relates to a method for replenishing a membrane-making solution in the process of preparing a molecular sieve membrane by long-term reaction. The invention is also applicable to the preparation of other molecular sieve membranes. Background technique [0002] Molecular sieve pervaporation membrane separation technology is a new type of separation technology, which has the advantages of high efficiency and energy saving, easy process control, convenient operation, easy scale-up and industrialization, etc. It plays an increasingly important role in new energy development, resource optimization utilization and environmental protection. It plays an important role and is one of the most promising high-tech in the 21st century. The research on using molecular sieve membranes for o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/02C01B39/30
CPCB01D67/0051B01D71/028C01B39/30C01P2004/03
Inventor 杨占照朱月馨纪祖焕庆珺
Owner JIANGSU NINE HEAVEN HIGH TECH
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