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Process for producing high concentration tert-butyl alcohol by permeation vaporization method and products therefrom

A technology of pervaporation and tert-butanol, which is applied in the field of separation, can solve problems such as high energy consumption, complex production process, and impact on product quality, and achieve the effects of high yield, simple process, and broadened application range

Inactive Publication Date: 2005-07-06
上海蓝景膜技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these traditional production methods have the disadvantages of complex production process and high energy consumption. In some methods, extractants containing impurities are introduced, which affects product quality.

Method used

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  • Process for producing high concentration tert-butyl alcohol by permeation vaporization method and products therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put a dilute aqueous solution with a mass content of 85% tert-butanol in 10m 3 In the raw material tank of the volume, the raw material temperature is normal temperature 25°C. With rated flow rate 0.6m 3 / h, a centrifugal pump with a lift of 65m pumps out the raw material, with a flow rate of 300kg / h, and enters the heat exchanger. The raw material is preheated to 60°C by absorbing the heat of the product material, and then enters a heater, and is heated by 105°C hot water. The raw material is heated to 95°C and enters the vacuum cover, and the inlet pressure of the membrane separator is 0.3MPa. In the vacuum cover, the water-permeable membrane divides the membrane separator into two chambers, the upstream side and the downstream side. The upstream side is a liquid phase chamber, and the downstream side is a vapor phase chamber. 30mmHg absolute pressure. In the liquid phase chamber of the pervaporation membrane separator in the vacuum cover, the liquid phase material...

Embodiment 2

[0025] Put a dilute aqueous solution with a mass content of 99% tert-butanol in 10m 3 In the raw material tank of the volume, the raw material temperature is normal temperature 25°C. With rated flow rate 0.6m 3 / h, a centrifugal pump with a head of 65m pumps out the raw material with a flow rate of 300kg / h, and enters the heat exchanger, preheats the raw material to 60°C by absorbing the heat of the product material, and then enters the electric heater to heat the raw material to 95 ℃, enter the vacuum cover, and the inlet pressure of the membrane separator is 0.3MPa. In the vacuum cover, the water-permeable membrane divides the membrane separator into two chambers, the upstream side and the downstream side. The upstream side is a liquid phase chamber, and the downstream side is a vapor phase chamber. 10mmHg absolute pressure. In the liquid phase chamber of the pervaporation membrane separator in the vacuum cover, the liquid phase material flows through the upstream side of...

Embodiment 3

[0027] Put a dilute aqueous solution with a mass content of 85% tert-butanol in 10m 3 In the raw material tank of the volume, the raw material temperature is normal temperature 25°C. With rated flow rate 0.6m 3 / h, a centrifugal pump with a lift of 65m pumps out the raw material with a flow rate of 300kg / h, and enters the heat exchanger. The raw material is preheated to 60°C by absorbing the heat of the product material, and then enters the steam heat exchanger to heat the raw material to 95°C, enter the vacuum cover, and the inlet pressure of the membrane separator is 0.4MPa. In the vacuum cover, the water-permeable membrane divides the membrane separator into two chambers, the upstream side and the downstream side. The upstream side is a liquid phase chamber, and the downstream side is a vapor phase chamber. 10mmHg absolute pressure. In the liquid phase chamber of the pervaporation membrane separator in the vacuum cover, the liquid phase material flows through the upstream...

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Abstract

Disclosed is a method for producing high concentration tert-butyl alcohol by permeation vaporization method and products therefrom. A membrane separating method is applied to separate tert-butyl alcohol and water from tert-butyl alcohol solution, characterized in that the separation process includes the following steps: heating tert-butyl alcohol solution under 60-105íµ in a heater; placing the solution in a vacuum hood, in which a permeation membrane divides a membrane separator into upstream side and downstream side, the upstream side is a liquid phase chamber, while the downstream side is a vapor phase chamber, which connects the vacuum system, the vapor phase chamber keeps an absolute pressure of 1-50mmHg by pumping of a vacuum pump, as a result, tert-butyl alcohol and water are separated by the membrane separator, high concentration tert-butyl alcohol product is obtained in the exit of the membrane separator and water is permeated in the vapor phase chamber of the downstream side and separated from the solution under vacuum low pressure by vaporization and condensation. The invention has simple production process, low energy consumption, protects environment and reduces production costs.

Description

1. Technical field: [0001] The invention relates to a separation technology, in particular discloses a new process for producing high-concentration tert-butanol by pervaporation, purifying dilute aqueous solution of tert-butanol with a mass concentration of 0.1% to 20% of concentrated water, and producing anhydrous tert-butanol butanol. 2. Background technology: [0002] As a new type of petrochemical product, high-concentration tert-butanol has great market potential and market benefits. High-concentration tert-butanol products can be used in large quantities as fuel oil additives to increase the octane number of gasoline. High-concentration tert-butanol is also widely used as a solvent, and can be used as a solvent and diluent for nitrocellulose and synthetic resins. Phthalate, oxalate, certain dicarboxylates and phosphates of tert-butanol can be used as plasticizers for polyvinyl chloride and its copolymers. Tert-butyl phenol prepared from tert-butanol as a phenol alky...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/76C07C31/12
Inventor 吴光陈翠仙李继定刘寿山
Owner 上海蓝景膜技术工程有限公司
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