A kind of catalyst seed crystal preparation method for methanol to olefin

A technology for producing olefins and catalysts from methanol, which is applied in molecular sieve catalysts, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of high price, difficulty in increasing the yield of raw catalyst powder, and low product yield, etc. Yield, specific surface area increase, particle size uniform effect

Inactive Publication Date: 2017-08-25
ANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production and preparation process of the raw catalyst powder has strict requirements, and the product yield is not high and the price is expensive, so improving the product yield is of great significance; in the existing production process, it is difficult to strictly control the process indicators through careful operation Increase the output of raw catalyst powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing catalyst seed crystals for methanol to olefins, comprising the following steps:

[0025] (1) Put two kinds of small balls with diameters of 10mm and 6mm into the ball mill tank in the ball mill, and the mass ratio of these two diameter balls is 1:1; the total volume of the two kinds of small balls accounts for 2% of the volume of the ball mill tank. / 5;

[0026] (2) Add the original powder of the acid-silicate-aluminum catalyst with a particle size of 1 μm and the desalted water at a temperature of 30°C into the ball mill tank at a mass ratio of 1:0.5, and their total volume accounts for 2 / 5 of the volume of the ball mill tank;

[0027] (3) Turn on the ball mill and perform ball milling at a frequency of 30Hz for 150 hours; the internal temperature of the ball mill tank is 20°C, and the external temperature is 30°C;

[0028] (4) After ball milling, the slurry in the tank and the balls are separated through a screen, and the ball milling tank and ...

Embodiment 2

[0030] A method for preparing catalyst seed crystals for methanol to olefins, comprising the following steps:

[0031] (1) Put two kinds of small balls with diameters of 10mm and 6mm into the ball mill tank in the ball mill, and the mass ratio of these two diameter balls is 1:1.5; the total volume of the two kinds of small balls accounts for 2% of the volume of the ball mill tank / 5;

[0032] (2) Add the original powder of the acid-silicate-aluminum catalyst with a particle size of 3 μm and the desalted water at a temperature of 30°C into the ball mill tank at a mass ratio of 1:1, and their total volume accounts for 2 / 5 of the volume of the ball mill tank;

[0033] (3) Turn on the ball mill and perform ball milling at a frequency of 35Hz for 100 hours; the internal temperature of the ball mill tank is 40°C and the external temperature is 50°C;

[0034] (4) After ball milling, the slurry in the tank and the balls are separated through a screen, and the ball milling tank and th...

Embodiment 3

[0036] A method for preparing catalyst seed crystals for methanol to olefins, comprising the following steps:

[0037] (1) Put two kinds of small balls with diameters of 10mm and 6mm into the ball mill tank of the ball mill. The mass ratio of these two diameter balls is 1: 1.2; the total volume of the two kinds of small balls accounts for 2% of the volume of the ball mill tank. / 5;

[0038] (2) Add the original powder of the acid-silicate-aluminum catalyst with a particle size of 2 μm and the desalted water at a temperature of 10°C into the ball mill tank at a mass ratio of 1:0.8, and their total volume accounts for 2 / 5 of the volume of the ball mill tank;

[0039] (3) Turn on the ball mill and perform ball milling at a frequency of 32Hz for 120 hours; the internal temperature of the ball mill tank is 10°C, and the external temperature is 20°C;

[0040] (4) After ball milling, the slurry in the tank and the balls are separated through a screen, and the ball milling tank and t...

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PUM

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Abstract

The invention discloses a method for preparing catalyst seed crystals for methanol to olefins. Firstly, two kinds of small balls with diameters of 10mm and 6mm are loaded into a ball mill tank in a ball mill; According to the mass ratio of 1:0.5~1:1, add it into the ball milling tank for ball milling; after the ball milling, separate the slurry and pellets in the tank through a screen, wash the ball milling tank and pellets with desalinated water, and collect the slurry as phosphoric acid Si-alumina catalyst seed crystal mixture. The present invention adopts the original powder of silicoaluminophosphate catalyst with a particle size of 1-3 μm to prepare a catalyst seed crystal with a particle size of 0.4-0.8 μm. The increased surface area accelerates the growth of crystals, thereby increasing the yield of raw catalyst powder.

Description

technical field [0001] The invention relates to the technical field of chemical preparation, in particular to a method for preparing catalyst seed crystals for methanol to olefins. [0002] technical background [0003] As raw materials for synthetic detergents, plastics, fibers and various chemical materials, olefins play a pivotal role in the modern petrochemical industry. Traditional light olefins are produced through petroleum cracking. With the increasing shortage of petroleum resources, scientists from various countries are intensively working on finding alternative resources for petroleum. The work of using coal or natural gas as raw material to produce methanol through synthesis gas, and then to synthesize ethylene and other low-carbon olefins from methanol has attracted the attention of researchers from all over the world. [0004] At present, there are two main methods of methanol to olefins: one is the MTO technology, that is, the synthesis gas is first produced f...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J29/85
Inventor桑国春苏传好许静圣少虎
OwnerANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH