Purification rectifying tower and purification method for 3-methyl-3-butene-1-alcohol

Abstract

The invention discloses a purification rectifying tower and purification method for 3-methyl-3-butene-1-alcohol. The purification rectifying tower comprises a rectifying tower body, wherein a raw material inlet is formed in the middle part of the rectifying tower body; a solvent inlet is formed in a position, near the tower top, on the rectifying tower body; a solvent heater is connected onto thesolvent inlet through a pipeline; a tower bottom pipeline is arranged at the tower bottom of the rectifying tower body; a kettle liquid pump is connected onto the tower bottom pipeline; a gas phase inlet is formed in the bottom of the rectifying tower body; a tower bottom heater is also connected onto the tower bottom pipeline of the rectifying tower body; one end of the tower bottom heater is connected with the tower bottom pipeline; the other end of the tower bottom heater is connected with the gas phase inlet. The purification tower adopting the scheme is simple in structure. The purification method has the advantages that the inhibition on the self aggregation of the 3-methyl-3-butene-1-alcohol is facilitated; the decomposition loss of solvent is favorably reduced during the long-period production; the mutual solubility of a separation system and the solvent is favorably enhanced; the separation efficiency of gradual operation is improved; the yield of the 3-methyl-3-butene-1-alcohol can reach 99.99 percent.

Description

technical field [0001] The invention relates to a purification method and device, in particular to a purification and rectification tower for 3-methyl-3-buten-1-ol and a purification method. Background technique [0002] 3-Methyl-3-buten-1-ol is a water reducer intermediate, which can further synthesize isopentenol (3-methyl-2-butene-1- alcohol). During hydroisomerization, in addition to mainly obtaining prenol, part of 3-methyl-3-buten-1-ol will be converted into isoamyl alcohol. In order to obtain a higher yield of isopentenol, it is necessary to separate 3-methyl-3-buten-1-ol from isopentenol in production. Since the boiling points of 3-methyl-3-buten-1-ol and isoamyl alcohol are very close, it is difficult to achieve the ideal separation effect by conventional separation means, and an effective separation method needs to be developed. [0003] The traditional method for separating alkanes and olefins mixtures can be extractive distillation, usually using strong polar ...

AI Technical Summary

Problems solved by technology

Since olefins enter the bottom of the rectification tower with the solvent, and the temperature at the bottom of the tower is often high, it is easy to cause problems such as yield drop and equipment blockage for unsaturated hydrocarbons that are easy to self-polymerize. When nitrogen-containing or sulfur-containing solvents are used There are also unfavorable factors such as solvent pyrolysis

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