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Method for preparing NaY zeolite

A technology of zeolite and zeolite directing agent, which is applied in the field of inorganic non-metal, can solve the problems of low zeolite output, high energy consumption, equipment corrosion, etc., and achieve the effects of high crystallinity, high whiteness and cost saving

Inactive Publication Date: 2012-12-26
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of high energy consumption, serious equipment corrosion and low zeolite yield in the prior art due to the high temperature calcination activation or pickling activation required in the process of synthesizing NaY zeolite with natural minerals as raw materials, and to provide a A kind of method for preparing NaY zeolite with simple process, easy to obtain raw materials and low cost

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  • Method for preparing NaY zeolite

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Effect test

Embodiment 1

[0032] Example 1: Using bentonite from Liaoning as raw material, its components and the contents of each component are: SiO 2 =71.96%; Al 2 o 3 = 15.04%; Fe 2 o 3 = 0.23%; TiO 2 =0.11%; CaO=1.02%; MgO=2.69%; Na 2 O = 1.14%; K 2 O = 0.86%; H 2 O = 5.52%.

[0033] First, add 680 grams of bentonite that has been prepared into the sodium hydroxide solution. The sodium hydroxide solution is made by dissolving 360 grams of sodium hydroxide in 2000 ml of water. After stirring evenly, place it in a high-pressure reactor. Stir for 5 hours under the condition of 150°C, then cool down to below 50°C, add 1500 ml of water, stir for 10 minutes, so that the molar ratio between the materials in the lye is: Na 2 O:Al 2 o 3 : SiO 2 :H 2O=4.5:1:8.1:200 to prepare NaY zeolite. Then add 350 ml of NaY zeolite structure-directing agent, stir for 30 minutes, stop stirring, let stand and age for 6 hours, then start stirring, raise the temperature to 100°C, crystallize for 12 hours, filter...

Embodiment 2

[0034] Embodiment 2: the bentonite raw material that adopts is the same as embodiment 1. The difference between this embodiment and embodiment 1 is that the temperature conditions of the high-temperature lye activation treatment are different, that is, the temperature conditions in the autoclave are different from those of embodiment 1.

[0035] First, add 680 grams of bentonite that has been prepared into the sodium hydroxide solution. The sodium hydroxide solution is made by dissolving 360 grams of sodium hydroxide in 2000 ml of water. After stirring evenly, place it in a high-pressure reactor. Stir for 5 hours at 200°C, then cool down to below 50°C, add 1500 milliliters of water (the molar ratio conditions are the same as in Example 1), and stir for 10 minutes; add 350 milliliters of directing agent, stop stirring after 30 minutes, and let Set aside to age for 6 hours, then start stirring, raise the temperature to 100°C, crystallize for 12 hours, filter after cooling, wash, ...

Embodiment 3

[0036] Embodiment 3: the bentonite raw material that adopts is the same as embodiment 1.

[0037] First, add 680 grams of bentonite that has been prepared into the sodium hydroxide solution. The sodium hydroxide solution is made by dissolving 400 grams of sodium hydroxide in 2000 ml of water. After stirring evenly, place it in a high-pressure reactor. Stir for 5 hours at 200°C, then cool down to below 50°C, add 2500 ml of water, stir for 10 minutes, so that the molar ratio between the materials in the lye is: Na 2 O:Al 2 o 3 : SiO 2 :H 2 O=5:1:8.1:250 to prepare NaY zeolite. Then add 500 ml of NaY zeolite structure directing agent, stir for 30 minutes, stop stirring, let stand and age for 6 hours, then start stirring, raise the temperature to 100°C, crystallize for 12 hours, filter and wash after cooling, and then After drying, the finished product of NaY zeolite is obtained. The product is detected by "X-ray diffraction analysis", and the crystallinity of the sample is ...

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Abstract

The invention discloses a method for preparing NaY zeolite, and solves the technical problems in the prior art that the energy consumption is high, equipment is severely corroded, the zeolite output is low, the environment is polluted, and the like, which are caused during NaY zeolite preparation. Therefore, the invention provides a novel method for preparing the NaY zeolite. The technical scheme of the novel method comprises the following steps: raw materials are prepared; bentonite is ground and processed to 200 meshes below; activating treatment is conducted by using high temperature lye; a die is adjusted; seed crystals or directing agents are added; standing and ageing are conducted; crystallization is conducted; and then filtration, washing and drying are conducted. Through the adoption of the technical scheme provided by the invention, the problems in the prior art are solved, and the technical effects that the energy consumption is low during preparation, the cost is low, the raw materials are easy to manufacture, no pollution is caused, instruments and the equipment cannot be damaged, and the like are achieved.

Description

technical field [0001] The invention relates to the field of inorganic nonmetal, in particular to a preparation method of zeolite. Background technique [0002] Y-type zeolite has an extremely important application in the field of petrochemical industry. The composition of NaY zeolite is Na 56 [Al 56 Si 136 o 384 ]·250H 2 O belongs to the cubic crystal system. Its structure is composed of a large nearly spherical cage structure with a pore diameter of 1.3nm. The cages are connected by twelve-membered rings to form an open channel system with a pore diameter of 0.74nm. Y-type zeolite has excellent thermal stability, acid and alkali corrosion resistance, and outstanding performance in adsorption, ion exchange, and catalysis. [0003] The method of synthesizing NaY zeolite is to adopt pure chemical raw material method to prepare NaY zeolite at present, and the product quality that obtains is good, but cost is high, is unfavorable for industrial large-scale production; It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08C01B39/24
Inventor 宋科何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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