A kind of method of producing mcm-49 molecular sieve

A technology of MCM-49 and molecular sieve, which is applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of high cost of molecular sieve, high price of hexamethyleneimine, and restrictions on the wide application of MCM-49 molecular sieve, so as to reduce production cost , the effect of shortening the crystallization time
CN103848433BActive Publication Date: 2016-03-09PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2016-03-09

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Abstract

The invention relates to a method of producing an MCM-49 molecular sieve. The method includes: dissolving sodium metaaluminate or sodium aluminate, and sodium hydroxide into desalted water to prepare an aqueous sodium metaaluminate / alkali solution or an aqueous sodium aluminate / alkali solution; adding ethyl silicate into silica sol to prepare a silica sol / ethyl silicate emulsion; adding hexamethyleneimine into cyclohexylamine to prepare a hexamethyleneimine-cyclohexylamine binary template agent, adding the binary template agent into the silica sol / ethyl silicate emulsion, fully stirring, adding dropwise the aqueous sodium metaaluminate / alkali solution or the aqueous sodium aluminate / alkali solution, adding a NaMCM-49 molecular sieve, colloidizing and crystallizing to prepare the MCM-49 molecular sieve. According to the method, the binary template agent is adopted, the organosilicone source is increased, the using amount of the seed crystal is increased, the crystallizing time is shortened, and the production cost of the MCM-49 molecular sieve is reduced.
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Description

technical field

[0001] The invention relates to a method for producing MCM-49 molecular sieves, in particular to a method for producing MCM-49 molecular sieves by adding crystal seeds to a composite template agent and adding organic silicon sources. Background technique

[0002] MCM-49 molecular sieves are a series of layered molecular sieves with MWW structure. Its crystals are sheet-like and have three different pore structures. First, similar to ZSM-5 molecular sieve, it has a set of two-dimensional sinusoidal channels with a pore size of sixteen-membered rings (0.4×0.59nm), but the opening is slightly smaller than ZSM-5, and the channel network is more developed; second, there are 0.71 ×0.71×1.82nm supercage, the opening is a sixteen-membered ring (0.4×0.54nm); third, the upper and lower surfaces of the crystal have a high-density pore structure, the opening of the hole is a twelve-membered ring, and the depth is about 0.7nm. Because of its unique structure, using this ...

Claims

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