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Production method for low-carbon acetate

A production method and low-carbon ester technology, which is applied in the field of low-carbon acetate production, can solve problems such as few reports, and achieve the effects of less by-products, high activity, and low equipment corrosion

Inactive Publication Date: 2016-05-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, there are few reports on the use of other acidic ionic liquids to catalyze acid-ene addition-esterification reactions.

Method used

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  • Production method for low-carbon acetate
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  • Production method for low-carbon acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Acidic ionic liquid [BSN 222 ][H 2 PW 12 o 40 ] is the catalyzer of acetic acid-butene addition esterification. where BSN 222 For triethyl butyl ammonium sulfonate. Add 0.5g of [BSN 222 ][H 2 PW 12 o 40 ], acetic acid 5ml, tighten the lid of the kettle to form a closed space. Start the stirrer with a rotating speed of 1000r / min. Turn on the feed gas sampling pump, set the sampling rate to 500ml / h, and add 15ml of liquefied gas containing 28.6wt% olefins. Set the temperature of the circulating oil bath to 90°C, and start timing when the thermometer in the reactor reaches the set temperature, and the reaction time is 4 hours. After the reaction time reaches 4 hours, stop stirring and heating, and continue to stand still for 15 minutes after the reaction kettle is naturally cooled to room temperature. The exhaust gas is then collected with an air bag to ensure that all the gas is collected in one air bag. The liquid part was washed repeatedly with water, ether...

Embodiment 2

[0048] With acidic ionic liquid [Ph 3 PSO 3 H][HSO 4 ] is the catalyzer of acetic acid-butene addition esterification. The amount of catalyst was 3.62 g. The reaction steps are the same as in Example 1. The conversion rate of each olefin component, the total olefin conversion rate and the selectivity of sec-butyl acetate are shown in Table 4.

[0049] Table 4

[0050]

Embodiment 3

[0052] Acidic ionic liquid [BSN 222 ] 3 [PW 12 o 40 ] is the catalyzer of acetic acid-butene addition esterification. The amount of catalyst is [BSN 222 ] 3 [PW 12 o 40 ] 0.5g. The reaction steps are the same as in Example 1. The conversion rate of each olefin component, the total olefin conversion rate and the selectivity of sec-butyl acetate are shown in Table 5.

[0053] table 5

[0054]

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Abstract

The invention relates to a production method for low-carbon acetate. In the method, a catalyst based on an ionic liquid is employed to catalyze low-carbon olefin and acetic acid to be directly subjected to an additive polymerization reaction to produce the low-carbon acetate, wherein the cation in the ionic liquid is represented as the following structure formula, and the anions include: HSO4<->, CF3SO3<->, NTf2<->, H2PO4<->, PW12O40<3->, p-CH3-(C6H4)SO3<->, PMo12O40<3->, H2PW12O40<->, X<->, PF6<-> or SbF6<->. The ionic liquid catalyst can convert mixed butene into sec-butyl acetate at high selectivity. The catalyst is stable in structure and is easy to separate. The production method is simple in follow-up operations, is less in side products, is low in corrosion and is low in environment pollution.

Description

technical field [0001] The invention relates to a method for producing low-carbon esters of acetate, in particular to a method for producing low-carbon esters of acetate by catalyzing acid-alkene direct esterification. Background technique [0002] Low-carbon acetate is a widely used organic raw material, which has special significance in industrial production. For example, ethyl acetate is one of the synthetic spices used in a large amount in food flavors. It is widely used in the deployment of flavor food flavors such as bananas, pears, peaches, pineapples, and grapes; it is also a low-toxicity solvent used in industry and used as nitrocellulose. , ethyl cellulose, cellulose acetate and neoprene, etc., quick-drying solvents, cleaning agents in the textile industry and extractants for natural flavors. Second-butyl acetate has the advantages of strong solubility, moderate volatilization speed, low toxicity and less residue. It can dissolve various resins and organic substan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/04
Inventor 张锁江赵国英杨飞飞段显英
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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