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Process for preparing tertiary butanol

A technology of tert-butanol and isobutene, applied in the field of preparation of tert-butanol, can solve the problems of large weight ratio of tert-butanol, unavoidable butene polymerization problems, and high operating costs, so as to reduce production costs and eliminate butene polymerization side effects. reaction, the effect of improving the yield

Inactive Publication Date: 2004-07-14
QILU PETRO CHEM - SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1283174 discloses a method for producing tert-butanol, which is characterized in that tert-butanol is used as solvent, thereby overcoming the side reaction and the separation problem caused by other organic matter as solvent, but because tert-butanol is in the reaction The proportion of weight in the liquid is relatively large, and the operating cost is relatively high; JP59802176 discloses a method for preparing tert-butanol using acetic acid as a solvent. The conversion rate of isobutene is greater than 90%, but the equipment such as reactors and distillation towers must material
In addition, people have also made in-depth research on the type of hydration reaction. USP4982022 discloses a method for preparing tert-butanol by catalytic distillation hydration, which is characterized in that a certain amount of water is added to the upper part of the reaction section of the catalytic distillation tower to increase the isobutene. Conversion rate, since no other solvents are added to the reaction solution, the polymerization of butene is unavoidable in the hydration reaction

Method used

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  • Process for preparing tertiary butanol

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Embodiment 1

[0022] The production of tert-butanol is by-product mixed C4 in the steam cracking ethylene production process after removing butadiene as raw material, and the weight content of isobutene in C4 is 48.5%, and tetradecyl alcohol polyoxyethylene with a viscosity-average molecular weight of 300 is added to the water Ether, the add-on is 0.1% by weight, and the fixed-bed hydration reactor is filled with macroporous sulfonic acid ion exchange resins with an average particle size of Φ0.45mm, and the reaction section of the catalytic distillation tower is equipped with columnar sulfonic acid ion exchange resins. Exchange resin. Table 1 lists the operating conditions and results of the fixed bed reactor and catalytic distillation tower.

[0023] Table 1 The test results of C4 synthesis of tert-butanol by-product of ethylene cracking unit

[0024] project result

[0025] fixed bed reactor

[0026] C4 liquid phase velocity, h -1 0.45

[00...

Embodiment 2

[0051] The C4 distillate produced by catalytic cracking in an oil refinery is used as a raw material to produce tert-butanol. The isobutene content in C4 is 21.8% by weight, and nonylphenol polyoxyethylene ether with a molecular weight of 650 is added to water in an amount of 0.06% by weight. The reactor is filled with macroporous sulfonic acid ion exchange resin with a particle size of Φ0.45mm, and the reaction section of the catalytic distillation tower is filled with Raschig ring-shaped sulfonic acid ion exchange resin. Table 2 lists the operating conditions and results of the fixed bed reactor and catalytic distillation tower.

[0052] Table 2 Test results of FCC synthesis of tert-butanol

[0053] project result

[0054] fixed bed reactor

[0055] C4 liquid phase velocity, h -1 0.35

[0056] Water / carbon four, v / v 1:1

[0057] Inlet temperature, ℃ 60

[0058] Pressure, MPa 1.5

[0059] Tert-butanol selectivity, % 99.8...

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Abstract

The present invention relates to preparation process of tertiary butanol with C4 mixture containing isobutylene as material and through hydration reaction. The present invention features that isobutylene in C4 mixture fraction and water produce hydration to produce tertiary butanol inside catalytic distillation tower in the presence of catalyst and non-ionic surfactant. The said preparation process has high isobutylene converting rate, high tertiary butanol selectivity and low tertiary butanol producing cost.

Description

technical field [0001] The invention relates to a method for preparing tert-butanol, in particular to a method for preparing tert-butanol by hydration of isobutene in mixed C4 fractions. Background technique [0002] Tert-butanol is a colorless crystal or liquid and is widely used in the field of fine chemicals. Resin hydration is a general method for the production of tert-butanol. This method uses sulfonic acid ion exchange resin as a catalyst to hydrate the mixed C4 fraction containing isobutene to produce tert-butanol. Because C4 is immiscible with water, it not only leads to isobutene The conversion rate is low, generally 30% to 50%, and it leads to the polymerization of butene, thereby reducing the service life of the catalyst and the yield of tert-butanol. [0003] In order to improve the conversion rate and selectivity of the resin hydration method, people have done a lot of research and found that adding some solvents in the hydration reaction can improve the misci...

Claims

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Application Information

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IPC IPC(8): C07C29/04C07C31/12
CPCY02P20/10
Inventor 王伟郝兴仁孙松卿董凌云李艳青吕爱梅
Owner QILU PETRO CHEM - SINOPEC
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