Method for synthesizing Y-zeolite composite material

Abstract

The invention discloses one Y zeolite compound material's synthesizing method, its characteristic lay in this method includes the kleit roasts under 500 - 900 íµ temperatures the dehydration transforms the leaning kleit, the smashing, then made the particle size which is smaller than 230 microns powder, then joined the sodium silicate, the guide medicinal preparation, the sodium hydroxide and the water, the crystallization, filtered, the collection mother liquor, and then collect the mother liquor direct sales commission, which played partial or the complete sodium silicate and the sodium hydroxide role.

Description

technical field [0001] The invention relates to a synthesis method of a zeolite composite material, more specifically to a method for synthesizing a Y-type zeolite composite material through in-situ crystallization of kaolin. Background technique [0002] Y-type zeolite is the active component of petroleum catalytic cracking catalyst. The gel-directing agent method and the in-situ crystallization method of kaolin microspheres are the two main technological methods for the industrial production of Y-type zeolite. [0003] USP3,639,099 and USP4,166,099 disclose the method of synthesizing Y-type zeolite by gel directing agent method. In the synthetic technique of gel-directing agent method, the main problem that exists is that the silicon-aluminum ratio in the feed intake is relatively high, and the utilization rate of silicon is low, only 51-54% (Li Zhongxian etc., petroleum refining and chemical industry, 1998, V29 (10), 24~26), SiO in crystallization synthesis mother liquo...

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Problems solved by technology

USP3,506,594, USP3,503,900, USP3,647,718 proposed in-situ crystallization technology using kaolin as raw material to simultaneously prepare active components and matrix, the above process and patents USP3,377,886, USP3,367,887, USP3,657,154, USP3,663,165 , USP3,932, the problems that methods such as 268T exist are: 1) product crystallinity is low, and NaY content is less than 30%; 2) roasting temperature is high, basically all adopts the kaolin that roasts above 900 ℃, and energy consumption is big; 3) synthetic feed intake A lot of SiO 2 and other effective components are discharged with the mother liquor

[0007] CN1334142A in order to solve the problem that NaY content is little in CN1232862, active component and matrix can't be adjusted, proposes the scheme of adopting kaolin raw powder, its liquid phase SiO 2 / (high soil + partial soil) weight ratio reduced to 0.4-2.0

From its examples, when the liquid phase SiO 2 The weight of / (high soil + partial soil) is relatively small, and there are problems of low crystallinity or low silicon-aluminum ratio of the product, which will have a great impact on the thermal stability of the product; in addition, the method adopts two kinds of temperatures to roast kaolin, The complexity of the preparation process is increased, and the requirements for roasting equipment are also increased. Since the lowest roasting temperature of kaolin is 730°C, its energy consumption is also relatively large

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