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Method for separating tertiary butanol and water

A technology of tert-butanol and separator, applied in the field of separating tert-butanol-water, can solve the problems of low product quality and yield, high production cost, etc., and achieve the effects of convenient operation, high yield and high purity

Inactive Publication Date: 2009-12-23
烟台只楚天大精馏设备工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production cost of the above process products is high, and the product quality and yield are low

Method used

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  • Method for separating tertiary butanol and water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: as figure 1 The diagram of the device is shown. Put the tert-butanol-water solution F600ml containing 80% (wt %) tert-butanol into the batch distillation column tower kettle 2, check whether the joints are well sealed, valves 9-10 are closed, and feed to the top condenser 3. After feeding the cooling water, turn on the heating power supply to heat the reboiler, and operate the total reflux after there is reflux at the top of the tower, and control the temperature of the reflux liquid at 70-75°C.

[0022] Start the circulating pump 7 to keep the circulating water in a circulating state, and adjust the cooling water flow of the cooler (8), control the circulating water temperature to be 30-35°C, adjust the flow of the circulating pump (7), and keep the absolute pressure at 2500~ 5000Pa; after the azeotrope of tert-butanol-water gathers at the top of the tower, the cooler (8) cools the tert-butanol water to a liquid at 70-75°C.

[0023] When the gas phase t...

Embodiment 2

[0026] Example 2 as figure 1 The diagram of the device is shown. The tert-butanol-water solution F600ml that will contain 88% (wt %) tert-butanol is dropped in the batch rectification tower tower still 2, checks whether each joint is sealed well, and valve 9-10 is closed state,

[0027] After passing cooling water into the tower top condenser 3, turn on the heating power supply to heat the reboiler, and operate the total reflux after there is reflux at the top of the tower, and control the temperature of the reflux liquid to be 70-75°C.

[0028] Start the circulating pump 7 to keep the circulating water in a circulating state, and adjust the cooling water flow of the cooler 8 to control the temperature of the circulating water at 30-35°C, and adjust the flow of the circulating pump 7 to keep the absolute pressure at 2500-5000Pa; After the alcohol-water azeotrope gathers at the top of the tower, the cooler (8) cools the tert-butanol water to a liquid at 70-75°C.

[0029] When...

Embodiment 3

[0032] Example 3 as figure 1 The diagram of the device is shown. The tert-butanol-water solution (F) 600ml that will contain 92% (wt %) tert-butanol is put into batch rectification column tower still 2, checks whether each joint is sealed well, and valve 9-10 is closed state, to tower After the cooling water is fed into the top condenser 3, the heating power is turned on to heat the reboiler, and the total reflux operation is performed after there is reflux at the top of the tower, and the temperature of the reflux liquid is controlled to be 70-75°C.

[0033] Start the circulating pump 7 to keep the circulating water in a circulating state, and adjust the cooling water flow of the cooler 8 to control the temperature of the circulating water at 30-35°C, and adjust the flow of the circulating pump 7 to keep the absolute pressure at 2500-5000Pa; After the alcohol-water azeotrope gathers at the top of the tower, the cooler 8 cools the tert-butanol water to a liquid at 70-75°C.

...

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Abstract

The invention relates to an azeotrope separation method, in particular to a method for separating tertiary butanol and water. The tertiary butanol is separated from the water through a coupling method of total reflux batch distillation and pervaporation. A device comprising a batch distillation tower, a pervaporation membrane component and a water injection pump is used. The method for separating tertiary butanol and water is characterized in that a separation process comprises the following steps: a tertiary butanol water solution is dropped into the batch distillation tower, the total reflux operation is firstly carried out in the batch distillation tower, the azeotrope of the tertiary butanol-water enters a membrane separator through a condenser to further carry out dehydration separation after being converged at the tower top, permeation side pressure keeps absolute pressure of 700-7500Pa through the injection of the water injection pump, a tertiary butanol water solution separates the tertiary butanol from the water through the membrane separator, the tertiary butanol product with high concentration can be obtained in a tower kettle of a distillation tower, the water permeates in a vapor phase chamber at the downstream of the membrane separator, and the water is separated from the tertiary butanol through vaporization and condensation in vacuum low pressure. The invention has the advantages of convenient production process operation, no introduction of other solvents, and high yield of the tertiary butanol and certain promotion value.

Description

Technical field: [0001] The invention relates to an azeotrope separation method, in particular to a method for separating tert-butanol-water. Background technique: [0002] Tert-butanol (TBA), also known as tert-butanol trimethylmethanol, is a colorless crystal with camphor odor at room temperature, and is liquid in the presence of a small amount of water. Very hygroscopic, soluble in most organic solvents, such as alcohols, esters, ethers, aliphatic hydrocarbons, aromatic hydrocarbons. It is used as emulsifier, dye dispersant, dehydrating agent, paint remover, industrial detergent, etc. It is also used as plasticizer, herbicide, and oil extractant. Due to these properties, tert-butanol is used as a co-solvent for nitro spray paint and nitro paint thinner. Tert-butanol and water can form an azeotropic mixture, the azeotropic boiling point is 82.5°C, and the mass fraction of water is 11.76%. High-purity tert-butanol cannot be obtained by ordinary distillation. [0003] At ...

Claims

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Application Information

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IPC IPC(8): C07C31/12C07C29/80C07C29/76
Inventor 肖峰白鹏陈金婷钟国栋魏金琴姜明东
Owner 烟台只楚天大精馏设备工程技术有限公司
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