ZSM-5 molecular sieve for synthesizing propylene from methanol, preparation method and application thereof

A ZSM-5, methanol synthesis technology, applied in molecular sieve catalysts, chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problems of low P/E ratio, low propylene selectivity, etc., and reduce the preparation cost. , the effect of simple preparation process

Inactive Publication Date: 2011-11-30
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of methanol conversion preparation propylene catalyst in the prior art that the selectivity

Method used

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  • ZSM-5 molecular sieve for synthesizing propylene from methanol, preparation method and application thereof
  • ZSM-5 molecular sieve for synthesizing propylene from methanol, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] Example 1

[0056] The raw material components of the molecular sieve in this embodiment are:

[0057] 144g of silica sol, the SiO of the silica sol 2 The mass percentage is 24%, Na 2 The mass percentage of O is 0.042%, and the mass is SiO 2 8.5 times the mass of deionized water, the mass is SiO 2 The mass of 50% tetrapropyl ammonium bromide, the aluminum source is aluminum sulfate, and Al 2 O 3 Calculated, the quality of aluminum sulfate is SiO 2 1.33% by mass, sodium hydroxide solution, concentrated sulfuric acid solution.

[0058] The molecular sieve is prepared from the above-mentioned component raw materials by the following method:

[0059] First, weigh 144g of silica sol, add the deionized water to dilute, add sodium hydroxide solution at a rate of 1ml / min to adjust the pH to 13, and stir well, then add tetrapropylammonium bromide dropwise at a rate of 1ml / min To this solution, then add aluminum sulfate dropwise, and finally add sulfuric acid solution to adjust the pH t...

Example Embodiment

[0063] Example 2

[0064] The raw material components of the molecular sieve in this embodiment are:

[0065] 144g of silica sol, the SiO of the silica sol 2 The mass percentage is 26%, Na 2 The mass percentage of O is 0.0485%, and the mass is SiO 2 7 times the mass of deionized water, the mass is SiO 2 The mass of 50% tetrapropyl ammonium bromide, the aluminum source is aluminum sulfate, and Al 2 O 3 Calculated, the quality of aluminum sulfate is SiO 2 0.57% by mass, potassium hydroxide solution, concentrated hydrochloric acid solution.

[0066] The molecular sieve is prepared from the above-mentioned component raw materials by the following method:

[0067] First, weigh 144g of silica sol, add deionized water to dilute, add potassium hydroxide solution at a rate of 2ml / min to adjust the pH to 13, stir well, then add tetrapropylammonium bromide dropwise at a rate of 2ml / min to The solution, then aluminum sulfate was added dropwise, and finally concentrated hydrochloric acid solution...

Example Embodiment

[0071] Example 3

[0072] The raw material components of the molecular sieve in this embodiment are:

[0073] 144g of silica sol, the SiO of the silica sol 2 The mass percentage is 25%, Na 2 The mass percentage of O is 0.046%, and the mass is SiO 2 8.5 times the mass of deionized water, the mass is SiO 2 30% by mass of tetrapropylammonium bromide, aluminum source is aluminum chloride, and Al 2 O 3 Calculated, the quality of aluminum chloride is SiO 2 0.28% by mass, sodium carbonate solution, concentrated nitric acid solution.

[0074] The molecular sieve is prepared from the above-mentioned component raw materials by the following method:

[0075] First, weigh 144g of silica sol, add deionized water to dilute, add sodium carbonate solution at a rate of 1.5ml / min to adjust the pH to 13, and stir well, add tetrapropylammonium bromide at a rate of 1.5ml / min to The solution is then added dropwise to the aluminum source, and finally concentrated nitric acid solution is added to adjust the...

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Abstract

The invention discloses a ZSM-5 molecular sieve used as a catalyst for synthesizing propylene from methanol and a preparation method thereof. The preparation method includes (1) weighing silica sol, adding deionized water to dilute, adjusting the pH value with an inorganic alkali solution, and dropping Add tetrapropylammonium bromide; (2) Add aluminum source dropwise, and then add inorganic acid solution to adjust the pH value; (3) Add high-pressure reaction axe, take it out after crystallization, wash and filter, and remove impurity ions; (4) Filter cake Drying and roasting can obtain the desired molecular sieve; this molecular sieve has the characteristics of controllable specific surface size, adjustable silicon-aluminum ratio and high dispersion, and has high propylene selectivity and good propylene/ The mass ratio of ethylene, the present invention also provides a catalyst for synthesizing propylene from methanol and a preparation method thereof, the catalyst prepared by the method has high propylene selectivity and P/E mass ratio, the catalyst does not need to add a binder, and the preparation process is simple, The preparation cost of the catalyst is effectively reduced.

Description

Technical field [0001] The invention is a chemical technology field, involving a type of ZSM-5 molecular sieve and its preparation methods, which specifically involves a ZSM-5 molecular sieve and its preparation methods for methanol synthetic acryl. Background technique [0002] Acryllis is an important organic chemical raw material. With the rapid growth of derivatives such as polypropylene, the demand for acrylic has also increased year by year.Pricen is mainly due to oil. The existing acrylic production route has provided propylene resources to the greatest extent. New sources and application technology issues of acrylic have received increasing attention.From a strategic perspective, the adoption of propylene (MTP technology) using natural gas methanol (MTP technology) can broaden raw material channels, adjust the structure of acrylic raw materials, reduce dependence on petroleum resources and avoid price risks.The research, development, and industrialization of MTP technolog...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 何霖韩伟谭亚南陈鹏王莉艾珍吴砚会
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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