Method for synthesizing NU-88 molecular sieves

A NU-88 and molecular sieve technology, which is applied in the direction of molecular sieve compounds, molecular sieve characteristic silicates, molecular sieves and alkali exchange compounds, etc., can solve the problems of high cost, energy and material consumption, and large time consumption of double quaternary ammonium salt templates , to achieve the effect of overcoming incomplete reaction of raw materials, avoiding waste and ineffective consumption, and avoiding time consumption
CN110407226AActive Publication Date: 2019-11-05CHINA PETROLEUM & CHEM CORP +1
3 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2019-11-05

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a method for synthesizing NU-88 molecular sieves. The method comprises the following steps of (1) mixing 1,3-dibromopropane, 1-methyl-4-piperidone and a solvent, and carryingout a pre-reaction at 15-60 DEG C for 0.5-96 h to obtain a pre-reaction product, wherein a molar ratio of the 1,3-dibromopropane to the 1-methyl-4-piperidone to the solvent is 1 to (1.8 to 3) to (1 to20); and (2) mixing the pre-reaction product obtained in the step (1), an organic alkali, an inorganic alkali, an aluminium source, a silicon source and water to obtain a to-be-crystallized mixture,conducting hydrothermal crystallization treatment on the to-be-crystallized mixture, and recovering a solid product. According to the disclosed method, necessary tedious processes, including high-costseparation and purification, of conventional synthesis of a NU-88 molecular sieve template are omitted, large time consumption, energy consumption and material consumption are avoided, and the cost reduction effect is obvious.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present disclosure relates to a method of synthesizing NU-88 molecular sieves. Background technique

[0002] NU-88 molecular sieve is a new type of molecular sieve first disclosed by patent USP60277707. The method uses bis(N-methylpyrrolidine) alkylene bromide as a template, wherein the alkylene group has 4 to 6 carbons, and dynamic crystallization is required for 9 to 22 days at a reaction temperature of 160°C. Obtain NU-88 molecular sieve. The molecular sieve structure of NU-88 has not been fully analyzed. According to the existing characterization and reaction evaluation results, it is speculated that it may belong to the BET family and has a three-dimensional twelve-membered ring channel structure.

[0003] Lee S B reported a method for synthesizing NU-88 molecular sieve in Journal of catalysis, 2003, 215: 151-170. The template used in this method is 1,6-bis(N-methylpyrrolidine) hexane bromide, and NU-88 molecular sieve can only be used in n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More