Process for preparing octaene by butene oligomerization

A technology for carbon octaolefin and butene, which is applied in the field of preparing carbon octaolefin by oligomerization of butene, can solve the problems of low catalytic activity, easy sludging of catalyst, low product selectivity, etc., and achieves good technical effect and high conversion rate. Effect

Active Publication Date: 2005-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, the catalyst is easy to muddy, the catalytic activity is low, and the product selectivity is low in the process of preparing carbon octaolefins by oligomerization of butene. Octene method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 20 grams of Fe-ZSM-5 molecular sieve (SiO 2 / Fe 2 o 3 The molar ratio is 90), add 6 grams of white carbon black and 3 grams of sage powder, and use 25 grams of SiO 2 (40% by weight) colloidal silica as a binding agent, extruded, pelletized, dried at 120°C for 12 hours, and roasted at 550°C for 3 hours to obtain the finished catalyst, SiO 2 / Fe 2 o 3 The molar ratio is 90, the catalyst is evaluated on a fixed-bed reactor, the filling volume is 10 ml, the reaction temperature is 300 ° C, the reaction pressure is 4.0 MPa, and the space velocity is 1 hour -1 , The raw material is mixed carbon four, and the weight content of olefins is 42%. The evaluation results show that the conversion rate of raw material olefins is 91.5%, and the selectivity of carbon eight olefins is 82%.

Embodiment 2

[0019] Catalyst preparation method is the same as embodiment 1, and metal M nitrate is gallium nitrate, finally makes Ga-ZSM-5 molecular sieve catalyst, SiO 2 / Ga 2 o 3 The molar ratio was 50. Take 20 grams of molecular sieves, add alumina and mix evenly, mold with 1 mol / liter nitric acid solution, dry and roast to make catalyst, fill 10 milliliters into a fixed bed reactor, the conditions are the same as Example 1, the result is that the conversion rate of raw material olefins is 85.5 %, the selectivity of carbon octaolefins is 75.2%.

Embodiment 3

[0021] Catalyst preparation method is the same as embodiment 1, finally makes Cr-ZSM-5 molecular sieve catalyst, SiO 2 / Cr 2 o 3 The molar ratio was 150. The operating conditions are the same as above. The results are: the conversion rate of raw material olefins is 86.5%, and the selectivity of carbon octaolefins is 80.5%.

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Abstract

The invention relates to a process for preparing octaene by butene oligomerizatio through using butene as raw material, using M-ZSM-5 molecular sieve as the catalyst for the reactive main body, and employing a reaction temperature of 250-350 deg. C, reaction pressure 4.0-5.0 MPa, liquid phase volume hourly space velocity of 0.5-3h-1, the prepared octaene can be used in the industrial production of octaene through butylenes oligomerization reaction.

Description

technical field [0001] The invention relates to a method for preparing carbon octaolefins by oligomerization of butene. Background technique [0002] In the by-product C of naphtha cracking and catalytic cracking (FCC) 4 Among the components, the content of butene is relatively high, and through the oligomerization of butene, it can be made into a high-octane gasoline blending component and a variety of high value-added chemical products. Therefore, the comprehensive utilization of butene based on oligomerization has a significant effect on improving the economic benefits of refineries and chemical plants. [0003] The butene oligomerization catalyst widely used in industry is phosphoric acid / diatomite catalyst. Under the reaction conditions, phosphoric acid reacts with the acidic carrier to generate phosphate, etc. under the reaction conditions, which will easily make the catalyst muddy and agglomerate to block the reactor. Although people h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/02
Inventor 宋伟红金照生周海春顾志华黄祖娟
Owner CHINA PETROLEUM & CHEM CORP
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