Method for producing isooctene with coproduction of sec-butyl carboxylate with selective superposition of butylene

A technology of acid sec-butyl ester and isooctene is applied in the field of selective lamination of butene to produce isooctene and co-production of sec-butyl carboxylate. Low and other problems to achieve the effect of prolonging life

Active Publication Date: 2012-10-31
SINOPEC BALING PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in the oil refining industry, olefin stacking has been a mature and industrialized process for many years, those skilled in this field are well aware that the existing butene stacking process still has the following deficiencies: (1) dimerization less selective
(3) Composite catalysts have strict requirements on impurities in raw materials, and the single-pass life of catalysts is generally short

Method used

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  • Method for producing isooctene with coproduction of sec-butyl carboxylate with selective superposition of butylene
  • Method for producing isooctene with coproduction of sec-butyl carboxylate with selective superposition of butylene
  • Method for producing isooctene with coproduction of sec-butyl carboxylate with selective superposition of butylene

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] This example supports cesium phosphotungstate salt (Cs) with silica 2.5 h 0.5 PW 12 o 40 / SiO 2 ) as a catalyst, under the condition of adding acetic acid (acid-ene molar ratio is 0.2), the mixture C 4 to fold. Raw material C4 mass composition: isobutane 31.2%, n-butane 12.7%, n-butene 14.5%, isobutene 16.8%, trans-2-butene 15.0%, cis-2-butene 9.6%, 1,3-butadiene 0.2%.

[0029] The superposition reaction was carried out on a laboratory fixed-bed reaction device. The reactor is a stainless steel pipe with a circulating water jacket outside of φ20×4×600 mm. C 4 The raw material and acetic acid enter the reactor from the lower part of the reactor through the metering pump respectively from the raw material storage tank. The reaction product discharged from the top of the reactor first passes through the six-way valve, then passes through the back pressure valve, the condenser, and finally is collected in the product storage tank. The reaction temperature is contr...

example 2

[0039] This example supports cesium phosphotungstate salt (Cs) with silica 2.5 h 0.5 PW 12 o 40 / SiO 2 ) is a catalyst, under the condition that acetic acid exists (the molar ratio of acetic acid and butene is 0.5), will mix C 4 to fold. raw material C 4 Mass composition: isobutane 31.2%, n-butane 12.7%, n-butene 14.5%, isobutene 16.8%, trans-2-butene 15.0%, cis-2-butene 9.6%, 1,3-butadiene 0.2% .

[0040] 20g Cs 2.5 h 0.5 PW 12 o 40 / SiO 2 Charge to the reactor of the reaction system described in Example 1. mix C 4 At 40g / h, acetic acid is continuously fed into the reaction system at a rate of 12g / h. The process conditions for controlling the reaction are: acid-ene molar ratio 0.5, reaction temperature 80°C, pressure 1.5MPa, for C 4 Feed weight hourly space velocity 2.0h -1 . After the reaction status is stable, the online sampling and analysis through the six-way valve is carried out regularly. The reaction was carried out continuously for 1000h. Table 3 is...

example 3

[0044] This example supports cesium phosphotungstate salt (Cs) with silica 2.5 h 0.5 PW 12 o 40 / SiO 2 ) as a catalyst, under the condition of adding propionic acid (acid-ene molar ratio is 0.2), the mixture C 4 to fold. Raw material C4 mass composition: isobutane 31.2%, n-butane 12.7%, n-butene 14.5%, isobutene 16.8%, trans-2-butene 15.0%, cis-2-butene 9.6%, 1,3-butadiene 0.2%.

[0045] 20g Cs 2.5 h 0.5 PW 12 o 40 / SiO 2 Charge to the reactor of the reaction system described in Example 1. mix C 4 At 40g / h, propionic acid is continuously fed into the reaction system at a rate of 6.0g / h. The process conditions for controlling the reaction are: acid-ene molar ratio 0.2, reaction temperature 80°C, pressure 1.5MPa, for C 4 Feed weight space velocity 2.0h -1 . After the reaction status is stable, the online sampling and analysis through the six-way valve is carried out regularly. The reaction was carried out continuously for 1000h. Table 4 is the conversion rate an...

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Abstract

The invention relates to a method for preparing iso-octenes by selectively superposing butenes and co-producing carboxylic acid-butyl. The method comprises the following steps: introducing the butenes into a reaction system filled with solid acid catalysts, and introducing certain amount of C1-C5 carboxylic acid, so that the butenes are superposed into the iso-octenes; at the same time, part of the butenes have addition reaction with the carboxylic acid to generate the carboxylic acid-butyl. The method is characterized in that the carboxylic acid is added to adjust the superposing catalyst, so that the butenes can be selectively superposed into the iso-octenes with higher degree of branched-chain to prevent the generation of tripolymer and polymer and prolong the service life of the catalyst; and simultaneously, the carboxylic acid plays a role of a reactant to have addition reaction with the butenes to produce the carboxylic acid-butyl, thus the coproduction of the iso-octenes and the carboxylic acid-butyl is realized through one process. The method for preparing the iso-octenes and the carboxylic acid-butyl has low cost of raw materials and simple reaction processes, and the obtained products are carboxylic acid-butyl environment-friendly solvents with good performance and iso-octene high-octane gasoline compositions.

Description

technical field [0001] The invention relates to a method for selectively superimposing butene to produce isooctene and co-producing sec-butyl carboxylate. technical background [0002] Isooctene is a widely used organic chemical raw material. It is a raw material for the synthesis of fine chemicals such as octylphenol, octylated diphenylamine, octylamine, and isononyl alcohol. It is also a high-quality vehicle engine fuel. Its octane number (RON) is as high as 110. Isooctane produced by hydrogenation of isooctene is a gasoline anti-knock additive with excellent performance, and is also a solvent with excellent performance. Isooctane has excellent anti-knock performance, so it is selected as the benchmark for measuring the octane number of gasoline, and its research octane number (RON) and motor octane number (MON) are both 100. At the same time, isooctane has the advantages of no sulfur, no aromatics, no olefins, and low vapor pressure, so it is the most ideal gasoline com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/08C07C11/02C07C67/04C07C69/02
Inventor 彭鸽威袁红星潘罗其
Owner SINOPEC BALING PETROCHEMICAL CO LTD
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