Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for synthetizing tetra(n-propyl)ammonium bromide

A technology of tetra-n-propylamine bromide and catalysts, which is applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., and can solve problems such as high product prices and catalyst production restrictions

Inactive Publication Date: 2012-04-11
NORTHEASTERN UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

HZSM-5 is a catalyst widely used in the petroleum industry. However, due to the need for templates to control the particle size and prevent the aggregation of particles, and templates still need to be imported, the production of HZSM-5 catalysts is limited, and the product price continues to rise.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthetizing tetra(n-propyl)ammonium bromide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] A three-necked flask is used as a reaction vessel, and a thermometer, a stirring paddle, and a reflux condensing device are respectively installed in the three-necked flask; an electric stirrer is used for stirring; an electric heating mantle with a thermocouple is used for heating, and the reaction temperature is set and controlled. 1-Bromo-n-propane and tri-n-propylamine are respectively measured at a molar ratio of 1:1, and a certain proportion of solvent is added, and the solvent is selected from acetonitrile, formamide, and dimethylformamide. First, add the tri-n-propylamine solution into the three-necked flask, then slowly add the 1-bromo-n-propane solution into the flask with strong stirring, and continue to react at 70-130 degrees for 8-22 Hours, the reaction is complete when no stratification occurs in the liquid layer. Stop heating, take out the three-necked flask and let it stand for a few days. After the precipitation is complete, filter, wash, and dry to ob...

Embodiment 2

[0009] Use an inert atmosphere to prevent bromine ions from being oxidized to generate bromine. Other steps are the same as example 1 [007] to obtain n-tetrapropylamine bromide with a purity of 99.9%, and the yield reaches 87%.

Embodiment 3

[0011] The use of 1-bromo-n-propanetri-n-propylamine with a molar ratio of 1.2: 1, other steps are the same as Example 2 [008], the product purity obtained is the same as Example 2 [009], and the productive rate is increased to 93%.

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

PUM

No PUM Login to View More

Abstract

In a production process of an industrial HZSM-5 catalyst, in order to generate nanoparticles and prevent the conglomeration and growth of the nanoparticles, a template agent tetra(n-propyl)ammonium bromide is required to be added. However, at present, tetra(n-propyl)ammonium bromide required at home needs to be imported, which brings inconvenience to the catalyst industry. The invention researches a method for synthetizing tetra(n-propyl)ammonium bromide by using 1-bromo-n-propane and tri(n-propyl)amine. The method comprises the following steps: reacting at 80 DEG C for 22 hours in acetonitrile or another solution under the condition that the molar ratio of 1-bromo-n-propane to tri(n-propyl)amine is 1:1, standing, filtering, and drying to obtain a pale yellow product of which purity is above 99% and maximum yield is up to 93%.

Description

technical field [0001] The invention relates to the field of industrially preparing HZSM-5 catalysts, in particular to a method for obtaining uniform nano-aluminum silicate particles by using tetra-n-propylamine bromide as a template in the process of industrially synthesizing the HZSM-5 catalysts. In addition, tetra-n-propylamine bromide can also be used as surfactant; solvent; intermediate; hair conditioner active ingredient; antistatic agent; washing detergent; fabric paper softener; phase transfer catalyst; bactericide; disinfectant; Slimicide; Algaecide; Emulsifier; Pigment dispersant, etc. Background technique [0002] As a big country in oil production and processing, my country needs to consume hundreds of millions of tons of catalysts every year. Improving the production technology of catalysts and producing catalysts with small particle size and narrow particle size distribution can prolong the service life of catalysts to a certain extent. HZSM-5 is a catalyst w...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/02B01J29/40
Inventor 王明华黎潮翟玉春
Owner NORTHEASTERN UNIV