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Method for preparing small molecule alkene by oxygen compounds

A compound and small molecule technology, which is applied in the field of preparing small molecule olefins from oxygen-containing compounds, can solve the problems such as the selectivity of small molecule olefins, and achieve the effects of improving contact methods, optimizing contact methods, and increasing selectivity

Active Publication Date: 2011-08-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Due to unnecessary side reactions such as aromatization and condensation in the above-mentioned prior art, unnecessary by-products such as aromatics, coke, etc. will be generated, which will affect the selectivity of small molecular olefins in the conversion process of oxygenates

Method used

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  • Method for preparing small molecule alkene by oxygen compounds
  • Method for preparing small molecule alkene by oxygen compounds
  • Method for preparing small molecule alkene by oxygen compounds

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The preparation of catalyst used in the embodiment: in 175 kilograms of aluminum sols (Shandong Zhoucun Catalyst Factory product, Al 2 o 3 11.4%, pH: 2-3), add 62.5 kg of kaolin (industrial product of Suzhou China Clay Company, solid content 80%), then add 100 kg of Fe-ZRP-1.5 zeolite slurry (solid content is 30%) and 162.5 kg of decationized Water, homogeneous, spray-dried, the obtained sample was washed until the pH value was close to 6, dried, and roasted at 500 ° C for 3 hours to obtain catalyst sample A, correspondingly, catalyst B containing Mg-ZRP-1.5, containing Ni- Catalyst C for ZRP-1.5.

[0042] The test device is a small fixed fluidized bed reaction device. Fresh catalysts are subjected to steam aging pretreatment before use, and the pretreatment conditions are: The loading amount of the catalyst is 150-300 grams. After the reaction device was stabilized under the set reaction conditions for 30 minutes, the sample was injected for reaction, and the reac...

Embodiment 1～3

[0051] 180 grams of aged catalyst was loaded into a small fixed fluidized bed reactor, and steam cracking raffinate C4 was reacted under the same reaction conditions. The main results are shown in Table 3. The above examples show that the steam cracking raffinate C4 can be selectively converted into small molecule olefins on the prepared catalyst.

[0052] table 3

[0053] Example

Embodiment 4～6

[0055] 180 g of aged catalyst was loaded into a small fixed fluidized bed reactor, and methanol was reacted under the same reaction conditions. The main results are shown in Table 4. The above examples show that methanol can be selectively converted into small molecule olefins on the prepared catalyst.

[0056] Table 4

[0057]

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Abstract

The process of preparing small molecule olefin with oxygen compound includes the following steps: contacting the light hydrocarbon material and catalyst to react in the first reaction region to produce oil gas and catalyst with charcoal; contacting the oil gas and catalyst with charcoal from the first reaction region, optional oxygen compound and regenerating catalyst to react in the second reaction region; contacting the oil gas and catalyst with charcoal from the second reaction region, and optional oxygen compound to react in the third region; separating oil gas from the catalyst to be regenerated, separating oil and gas to obtain products, and steam stripping the catalyst and returning the regenerated catalyst to the first reaction region. The process has multiple region reactor, optimized contact mode between the oxygen compound and catalyst, and raised small molecule olefin selectivity.

Description

technical field [0001] The present invention relates to a method for the selective catalytic conversion of oxygenates to small molecule olefins. Background technique [0002] Ethylene and propylene are the basic raw materials of the modern chemical industry, and their demand will increase. The traditional route to produce ethylene and propylene is through naphtha cracking. However, as the cost and risk of petroleum gradually increase, it becomes very important to find alternative sources of raw materials for the production of small molecule olefins. Natural gas to ethylene, propylene and other small molecular olefins (Methanol to Olefins, referred to as MTO) through methanol is the most promising process to replace the naphtha route to olefins. The process of producing methanol from natural gas (via synthesis gas) is well established, and the production of small molecule olefins (MTO) from methanol is a key link in this alternative route. Others, such as the production of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C11/04C07C1/20
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 谢朝钢朱根权张久顺舒兴田罗一斌杨义华
Owner CHINA PETROLEUM & CHEM CORP