1-hexene purification method

The isomerization of 2-ethyl-butene-1 to 3-methyl-pentene-2 at controlled conditions addresses the inefficiencies of existing hexene-1 purification methods, achieving high purity hexene-1 with simplified distillation and reduced environmental impact.

RU2206557C1Inactive Publication Date: 2003-06-20OTKRYTOE AKTSIONERNOE OBSHCHESTVO NIZHNEKAMSKNEFTEKHIM
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Patent Information

Application Number
RU2001130833
Authority / Receiving Office
RU · RU
Patent Type
Patents
Current Assignee / Owner
Filing Date
2001-11-13
Publication Date
2003-06-20
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing methods for purifying hexene-1 from branched isomers like 2-ethyl-butene-1 are inefficient and environmentally hazardous due to the use of toxic chemicals, and require complex distillation processes to achieve high purity.

Method used

A method involving isomerization of 2-ethyl-butene-1 to 3-methyl-pentene-2 on a medium-acid macroporous sulfonic cation exchanger at 50-80°C and 1-3 atm, followed by conventional distillation, to achieve high purity hexene-1 without significant isomerization of hexene-1.

Benefits of technology

This method achieves high purity hexene-1 (>99.5%) with reduced distillation complexity by selectively converting 2-ethyl-butene-1 to trans-3-methyl-pentene-2, allowing efficient separation using fewer theoretical plates.

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Abstract

FIELD: petrochemical processes. SUBSTANCE: 1- hexene containing more than 1 wt % 2-ethyl-1-butene is purified using selective isomerization of 2-ethyl-1-butene into 3-methyl-2-pentene at 50- 80 C and pressure 1-3 atm of inert atmosphere, volume flow rate of raw material being 1 to 10 h-1. Isomerization is catalyzed by middle-acidity macroporous sulfocationite having total static volume capacity 3.5-4.5 mg*equ. H+ / g. EFFECT: increased purity of product. 2 cl, 1 dwg, 3 tbl, 8 ex
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