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Method for preparing light olefins from ethanol and methanol

A technology for methanol preparation and low-carbon olefins, which is applied in the field of low-carbon olefins, can solve problems such as no existing, and achieve the effects of improving control level, reducing energy consumption, and improving product distribution.

Inactive Publication Date: 2010-03-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] So far, there is no method to produce low-carbon olefins such as ethylene and propylene through dehydration reaction using ethanol and methanol as raw materials

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] REUSY, SiO 2 / Al 2 o 3 After being calcined at 550°C for 2 hours, it was pressed into tablets, then granulated and screened with 20-40 mesh particles as the catalyst. The molar ratio of ethanol to methanol in the raw material is 1:1.39, the reaction temperature is 420°C, the pressure is 0.5MPa, and the space velocity is 0.7h -1 When, ethanol is converted into 99%, methanol conversion rate is 99.5%. The gas phase product selectivity is shown in Table 1.

Embodiment 2

[0029] USY, SiO 2 / Al 2 o 3 4.7, mixed with silica sol and kaolin to make catalyst powder, silica sol accounts for 12% of the total weight of the powder, and kaolin accounts for 20% of the total weight of the powder. After the raw powder is calcined at 550°C for 2 hours, it is pressed into tablets, and then granulated, and the granules with a mesh number between 20 and 40 are screened out as catalysts. The molar ratio of ethanol to methanol in the raw material is 1:1.39, the reaction temperature is 460°C, the pressure is 1.2MPa, and the space velocity is 1.0 h -1 , the conversion of ethanol is 99%, and the conversion rate of methanol is 99.5%. The gas phase product selectivity is shown in Table 1.

Embodiment 3

[0031] ZRP-5 molecular sieve with MFI structure, SiO 2 / Al 2 o 3 After being calcined at 550°C for 2 hours, it was pressed into tablets, then granulated, and the particles with a mesh number between 20 and 40 were screened out as catalysts. The molar ratio of ethanol to methanol in the raw material is 1:1.39, the reaction temperature is 500°C, the pressure is 1.0MPa, and the space velocity is 1.3h -1 When, ethanol is converted into 99%, methanol conversion rate is 99.5%. The gas phase product selectivity is shown in Table 1.

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Abstract

The invention relates to a method for preparing light olefins from ethanol and methanol. In the method, an ethanol raw material and a methanol raw material undergo a dehydration reaction in the presence of a molecular sieve catalyst. The method of the invention can produce a maximum amount of ethylene and propylene, reduce energy consumption and improve the control level of reaction conditions.

Description

technical field [0001] The invention relates to a method for preparing low-carbon olefins from ethanol and methanol, more specifically, a method for preparing low-carbon olefins such as ethylene and propylene through dehydration reaction using ethanol and methanol as raw materials. Background technique [0002] Both ethylene and propylene are important chemical raw materials, especially ethylene is known as the "father of chemical industry". my country's ethylene consumption is huge. In 2003, my country consumed 16.2 million tons of ethylene. It is expected to reach 26 million tons in 2010 and 40 million tons in 2020. Since ethylene products mainly come from the steam cracking process using petroleum hydrocarbons as raw materials, my country needs a large amount of oil to meet the growing demand for ethylene. However, in recent years, oil resources have been in short supply and international oil prices have continued to rise. To ensure the existing ethylene The quantity and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/02B01J29/04B01J29/85
CPCY02P30/20Y02P30/40
Inventor 谢文华刘强郭湘波慕旭宏罗一斌杨克勇舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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