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Purification of tertiary butyl alcohol

A technology of tert-butanol and alumina, applied in the separation/purification of hydroxyl compounds, organic chemistry, etc., can solve the problems of expensive, time-consuming, large investment and public works costs

Inactive Publication Date: 2006-11-08
LYONDELL CHEM TECH LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such methods are expensive and time-consuming, involving substantial investment and utility costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0021] Example 3: Adsorption operation with alumina and 13X zeolite

[0022] Example 3 The procedure of Comparative Example 1 was followed using two adsorbents: alumina (Selexsorb CD from Alcoa) followed by a large pore zeolite (13XHP from UOP). The experimental conditions and results are listed in Tables 1 and 2.

Embodiment 4

[0023] Example 4: Adsorption operation with alumina and 13X zeolite and molecular sieves

[0024] Example 4 using three adsorbents: alumina (Selexsorb CD from Alcoa) followed by large pore zeolite (13XHP from UOP) followed by molecular sieves (4A molecular sieve from UOP) followed the procedure of Comparative Example 1. The experimental conditions and results are listed in Tables 1 and 2.

[0025] The adsorption results show a significant improvement in the purification of tert-butanol when using at least two adsorbents containing alumina and a large pore zeolite. The two adsorbents described are very effective in removing impurities such as sec-butanol, methanol, acetone, isopropanol, MEK, isobutanol, isobutyl formate and water. However, without the use of alumina, tert-butyl formate breakthrough occurs rather early, limiting the adsorption capacity.

[0026] The results also showed that the purity of tert-butanol was further improved by lowering the water content of the pr...

Embodiment 5

[0027] Example 5: Adsorption of formate with various aluminas

[0028]Various types of alumina were tested and all were found to be effective in removing tert-butyl formate and isobutyl formate from a tert-butanol feed. Alumina samples tested included F-200 (7×14 Tyler mesh size activated alumina, Alcoa product), DD-2 (8×14 Tyler mesh size activated alumina, Alcoa product), Selexsorb CDO-200 (8×14 Tyler mesh size activated alumina with high Lewis acidity, Alcoa product), Selexsorb CDX (7×14 Tyler mesh size activated alumina, Alcoa product) Selexsorb CD (7×14 Tyler mesh size activated alumina, Alcoa product) and basic alumina (150 mesh, Aldrich).

[0029] To test various aluminas, different aluminas were loaded into 1 cm inner diameter glass columns and then fed with unpurified TBA at LHSV for approximately 0.22-0.29 hours -1 The rate is passed through the bed, and the product is collected. Table 3 lists the adsorption results.

[0030] operate#

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Abstract

The invention is a method to purify tertiary butyl alcohol by contact with at least two solid adsorbents comprising aluminum oxide and a large pore zeolite such as zeolite X. The purification method successfully improves product quality and reduces the amount of impurities in the tertiary butyl alcohol.

Description

field of invention [0001] The present invention relates to the purification of t-butanol by contacting impure t-butanol with at least two solid adsorbents comprising alumina and a large pore zeolite such as type X zeolite. This method is particularly suitable for separating tert-butanol from a small amount of oxygen-containing compound impurities with close boiling points. Background of the invention [0002] Typically, t-butanol produced by oxidation processes such as the Oxirane process contains small but significant amounts of impurities including water, isopropanol, acetone, methyl ethyl ketone, isobutanol, formate, sec-butanol, and the like. In certain applications, the presence of such impurities can cause problems with the desired application. For example, "high purity" tert-butanol is required as a reagent in the synthesis of specialty products such as pharmaceuticals and agrochemicals, and as a stabilizer for chlorinated hydrocarbons, among other applications. The...

Claims

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Application Information

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IPC IPC(8): C07C29/76C07C31/12
CPCC07C29/76C07C31/10C07C31/12
Inventor 李向民L·M·坎特拉韩元璋A·P·卡恩
Owner LYONDELL CHEM TECH LP
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