Method of synthesizing sec-butyl acetate and apparatus therefor

A technology of sec-butyl acetate and acetic acid, which is applied in the field of synthesizing sec-butyl acetate and its equipment, can solve the problems of catalyst deactivation, temperature rise control failure, complex reactor structure, etc., and achieve high selectivity, heat reduction, protection The effect of catalyst activity

Active Publication Date: 2016-10-05
PETROCHINA CO LTD
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Problems solved by technology

[0012] The purpose of the present invention is to provide a method and device for synthesizing sec-butyl acetate to solve the complex structure of the reactor in the prior art, and a l

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  • Method of synthesizing sec-butyl acetate and apparatus therefor
  • Method of synthesizing sec-butyl acetate and apparatus therefor
  • Method of synthesizing sec-butyl acetate and apparatus therefor

Examples

Experimental program
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[0093] Example 1:

[0094] according to Figure 4 In the process shown, the composition (mass percentage) of C4 fraction 1 is: 41.6% of isobutane, 13.3% of n-butane, 17.3% of 1-butene, 0.2% of isobutene, 13.5% of butene, and 15.1% of butene. The total butene is 45.1%.

[0095] The flow rate of C4 fraction 1 is 1000kg / h, the temperature is 20℃, and the pressure is 2.6MPa. The 200kg / h of C4 fraction 2 of the first stage is mixed with 1208kg / h of acetic acid 5 and then enters the first stage adiabatic fixed bed reactor 7. The inlet temperature is 60.0℃, the reaction pressure is 2.0MPa, and the C4 fraction feed mass space velocity is 4.0h -1 , The adiabatic temperature rise of the reactor is 36.6℃; the product 8 is mixed with 300kg / h of the second stage C4 fraction 3 and then enters the second stage adiabatic fixed bed reactor 10, the reactor inlet temperature is 72.6℃, the reaction pressure is 0.5MPa, C4 Distillate feed mass space velocity 2.0h -1 , The adiabatic temperature rise is...

Example Embodiment

[0099] Example 2:

[0100] according to Figure 4 In the process shown, the composition (mass percentage) of C4 fraction 1 is: isobutane 53.1%, n-butane 11.3%, 1-butene 14.6%, isobutene 2.1%, maleic 8.9%, butene 10.0%, The total butene is 35.6%.

[0101] The flow rate of C4 fraction 1 is 1000kg / h, the temperature is 20℃, and the pressure is 2.6MPa. The first stage C4 fraction 200kg / h is mixed with 1524kg / h of acetic acid 5 and then enters the first stage adiabatic fixed bed reactor 7. The reactor inlet temperature 50.0℃, reaction pressure 2.5MPa, C4 fraction feed mass space velocity 3.0h -1 , The adiabatic temperature rise is 24.1℃; the product 8 is mixed with 400kg / h of the second stage C4 fraction and enters the second stage adiabatic fixed bed reactor 10, the reactor inlet temperature is 62.9℃, the reaction pressure is 0.5MPa, and the C4 fraction feed quality Airspeed 2.0h -1 , The adiabatic temperature rise is 31.0℃; after being separated by the vapor-liquid separation tank 1...

Example Embodiment

[0105] Example 3:

[0106] according to Figure 4 In the process shown, the composition (mass percentage) of C4 fraction 1 is: isobutane 53.1%, n-butane 11.3%, 1-butene 14.6%, isobutene 2.1%, maleic 8.9%, butene 10.0%, The total butene is 35.6%.

[0107] The flow rate of C4 fraction 1 is 1000kg / h, the temperature is 20℃, and the pressure is 2.6MPa. The 200kg / h C4 fraction of the first stage is mixed with 1208kg / h of acetic acid 5 and then enters the first stage adiabatic fixed bed reactor 7. The reactor inlet temperature It is 60.0℃, reaction pressure is 2.0MPa, C4 fraction feed mass space velocity is 4.0h -1 , The adiabatic temperature rise is 28.3℃; the product 8 is mixed with 300kg / h of the second stage C4 fraction and then enters the second stage adiabatic fixed bed reactor 10. The reactor inlet temperature is 68.0℃, the reaction pressure is 0.5MPa, and the C4 fraction feed quality Airspeed 1.5h -1 , The adiabatic temperature rise is 27.1℃; after being separated by the vapor-...

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Abstract

The invention discloses a method of synthesizing sec-butyl acetate, which includes the steps of: a) a multi-section reaction step, in which a reaction is carried out completely to an inputted mixture containing acetic acid and C4 fractions in a multi-section adiabatic fixed bed reactor under the effect of a catalyst, and a reaction product is outputted; b) a temperature and pressure control step, in which the reaction product is fed into a temperature and pressure control apparatus to control the vaporization fraction of the reaction product through pressure and further control temperature increase of the reaction, when the reaction product reaches a preset temperature in the temperature and pressure control apparatus, a vaporization reaction is carried out and reaction heat is absorbed, wherein the reaction product is separated to form a vapor product and a liquid product, and the gas pressure is regulated according to the preset pressure value by means of the temperature and pressure control apparatus to discharge the vapor product while the liquid product is fed into the next section of the multi-section adiabatic fixed bed reactor and is continuously reacted with the C4 fraction completely; and c) a fraction separation step, in which the vapor product and the liquid product are received by a fraction separation column to separate the fractions, thereby synthesizing the sec-butyl acetate. The invention also discloses an apparatus of synthesizing the sec-butyl acetate.

Description

technical field [0001] The present invention particularly relates to a kind of method and device thereof for synthesizing sec-butyl acetate. Background technique [0002] Second-butyl acetate has the advantages of strong solubility, moderate volatilization speed, high extraction yield, low toxicity, and less residue. It has become one of the most influential environmentally friendly solvents in China; , non-corrosive, low oxygen content and other characteristics, it is a new type of chemical that can be used as a gasoline additive component, and has a broad market development prospect. [0003] The traditional method of producing sec-butyl acetate at home and abroad is to use sulfuric acid as a catalyst to catalyze the reaction of acetic acid and butanol, and use n-butene in C4 and acetic acid to directly synthesize sec-butyl acetate, which can significantly reduce production costs. The mainstream technology of butyl ester. [0004] Publication No. US5457228A discloses a m...

Claims

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Application Information

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IPC IPC(8): C07C67/04C07C67/54C07C69/14
Inventor 董炳利周金波姚志龙李长明杨珊珊苟文甲任海鸥程中克李博王艳飞唐迎春孔祥冰张松显许江李秋颖程琳郭珺
Owner PETROCHINA CO LTD
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