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Synthesis method of Y type molecular sieve

A synthesis method and molecular sieve technology, which are applied in the directions of fajhedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of high production cost of molecular sieve, non-conformity, pollution discharge, etc.

Active Publication Date: 2013-04-17
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0013] Previously reported techniques for preparing Y-type molecular sieves using natural kaolin minerals as raw materials also need to add additional silicon or aluminum sources in the form of inorganic chemical products, which makes the production cost of molecular sieves relatively high.
In addition, these inorganic chemical products used as synthetic raw materials for molecular sieves are mostly produced from natural minerals through complicated reaction and separation processes. The production process has long process lines, high energy and material consumption, and most processes have serious pollution emissions, which do not conform to modern green Chemical concept

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preparation example Construction

[0019] Specifically, the synthetic method of Y-type molecular sieve of the present invention comprises the following steps:

[0020] (1) Mineral activation, uniformly mix low-silicon-aluminum ratio minerals and high-silicon mineral powders in proportion, the mixed minerals and sodium hydroxide solids are mixed and ground according to the mass ratio of 1:1 to 2.5:1, and then heated at 550°C to Roasting at 900°C to become synthetic raw materials; or mixing and grinding high-silicon minerals and low-silicon-aluminum ratio minerals with sodium hydroxide solid at a mass ratio of 1:1 to 2.5:1, and then roasting at 550°C to 900°C before mixing, As a synthetic raw material; or mix and grind low-silicon-aluminum ratio minerals and sodium hydroxide solids in a mass ratio of 1:1 to 1:2, then roast at 550 to 900°C, and then mix with high The silicon mineral is mixed as a synthetic raw material. After mixing, the mass ratio of the mineral mixture to the sodium hydroxide solid is 1:1 to 2.5...

Embodiment 1

[0034] Dissolve 27.2 grams (g) of sodium hydroxide solid (produced by Beijing Chemical Plant, with a purity of 99%) in 38 g of water, cool to room temperature, and set aside. Get 26.66g aluminum sulfate (molecular formula: Al 2 (SO 4 ) 3 18H 2 (0, Beijing Yili Fine Chemicals Co., Ltd., with a purity of 99%) was dissolved in 38 g of water, and the prepared aluminum sulfate solution was added to the sodium hydroxide solution to make a high-alkali sodium metaaluminate solution. With 85.26g sodium silicate (molecular formula: Na 2 SiO 3 9H 2 O, Beijing Modern Chemical Reagent Company, purity is 99%) is dissolved in 100g water, adds 72g silica sol (Beijing Red Star Soda Soda Factory, SiO 2 The content is 24.96%, Na 2 O content is 0.05%), stirring rapidly for 2 hours. Then add high alkali sodium metaaluminate solution under stirring condition, mix evenly, stir and age at 30° C. for 4 hours, and stand and age at room temperature for 2 days to prepare a directing agent solutio...

Embodiment 2

[0038] The preparation method of the directing agent is the same as in Example 1. Commercially available kaolin and diatomaceous earth were dried and pulverized into powder respectively. Weigh 38g of kaolin powder and 23g of diatomaceous earth powder, uniformly mix with 60g of sodium hydroxide solid, roast at 780°C for 5 hours, and set aside.

[0039] Weigh 6 g of the above calcined mineral powder, add 40 g of deionized water and 6.7 g of directing agent, and mix and stir at 60° C. for 14 hours. The mixed solution was poured into a polytetrafluoroethylene-lined stainless steel crystallization kettle, and the temperature was raised to 95° C. for static crystallization for 18 hours. After the crystallization is completed, cool and filter to remove the mother liquor, wash until the pH value is less than 10, and dry at 120° C. to obtain a crystallized product. As determined by XRD, its phase belongs to NaY molecular sieve, the relative crystallinity of Y-type molecular sieve in ...

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Abstract

The invention belongs to the technical field of petrochemical industry, and relates to a synthesis method of a Y type molecular sieve. The method comprises the following steps: mixing two natural minerals according to a certain ratio, roasting, and performing crystallization reaction under hydrothermal conditions to obtain the Y type molecular sieve product, wherein the natural minerals are used as entire silicon sources and aluminum sources for molecular sieve synthesis and are a mixture of a low silicon-aluminum-ratio mineral and a high-silicon mineral. In the molecular sieve material, the relative crystallization degree of the Y type molecular sieve relative to the conventional Y type molecular sieve synthesized by using chemical reagents as raw materials is 70-95 wt%, and the silicon-aluminum-ratio of the molecular sieve product can be regulated by regulating the ratio of the two minerals in the raw materials for synthesis. The invention widens the raw material range in the preparation of the molecular sieve material, greatly lowers the production cost of the molecular sieve and obviously improves the cleanliness in the production process of the molecular sieve material.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for synthesizing a Y-type molecular sieve, which is characterized in that natural minerals are used as raw materials to provide all silicon sources and aluminum sources required for synthesizing the Y-type molecular sieve. Background technique [0002] In the field of petrochemical industry, Y-type molecular sieve is still the most widely used molecular sieve material. According to different synthetic raw materials, the synthesis methods of molecular sieves can be divided into two categories: the synthesis of molecular sieves from chemical raw materials and the synthesis of molecular sieves from natural minerals. The process technology of synthesizing molecular sieves with traditional inorganic chemical products as raw materials is mature, the technical conditions are easy to control, and the product quality is high. The process route is long, the consumption of energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
Inventor 鲍晓军李铁森刘海燕范煜石冈
Owner BC P INC CHINA NAT PETROLEUM CORP
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