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Method for safely and efficiently increasing separation yield of 3-methyl-3-butene-1-alcohol

A technology of methyl and butene, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as product purity and process safety

Active Publication Date: 2022-04-19
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, isobutene and formaldehyde can efficiently prepare 3-methyl-3-buten-1-ol through condensation reaction, but in the reaction process, the disproportionation reaction of formaldehyde will generate formic acid and methanol, and thus bring product purity and Process Safety Issues:
[0005] At present, in the process of industrialized preparation of 3-methyl-3-buten-1-ol, it is urgent to solve the problems of process safety, energy saving and product purity

Method used

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  • Method for safely and efficiently increasing separation yield of 3-methyl-3-butene-1-alcohol
  • Method for safely and efficiently increasing separation yield of 3-methyl-3-butene-1-alcohol

Examples

Experimental program
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Effect test

Embodiment 1

[0038] 3-methyl-3-buten-1-ol is refined and deweighted, and the tar composition is 3-methyl-3-buten-1-ol with a content of 29.75wt%, 3-methylene-1,5- The content of pentanediol and 3-methyl-2-pentene-1,5-pentanediol is 60.00wt%, the content of formic acid is 0.20wt%, the content of formaldehyde is 0.05wt%, and other components are 10.00wt%. A lysine aqueous solution with a mass concentration of 1.41% is prepared. The total number of rectifying separation column trays is 30, and the tar oil after 3-methyl-3-butene-1-alcohol is refined and deweighted is fed from the 20th plate of rectification column at a rate of 1g / min, and the above-mentioned Concentration is 1.41% lysine aqueous solution with the rate of 0.71g / min from the 10th tray feed of rectification column, thus the feed amount of calculating water is equivalent to 70% of heavy component feed amount, lysine The feed amount is equivalent to 1% of the heavy component feed amount. The operating pressure of the rectificati...

Embodiment 2

[0040] 3-methyl-3-buten-1-ol is refined and deweighted, and the tar composition is 3-methyl-3-buten-1-ol with a content of 40.00wt%, 3-methylene-1,5- The content of pentanediol and 3-methyl-2-pentene-1,5-pentanediol is 30.00wt%, the content of formic acid is 0.05wt%, the content of formaldehyde is 0.01wt%, and other components are 29.94wt%. A histidine aqueous solution with a mass concentration of 0.99% was prepared. The total number of rectifying separation column trays is 20, and the tar oil after 3-methyl-3-butene-1-alcohol is refined and deweighted is fed from the 15th plate of rectification column at a rate of 1g / min, and the above-mentioned Concentration is 0.99% histidine aqueous solution feeds from the rectification tower 5 plate plates with the rate of 0.202g / min, thus calculates that the feed amount of water is equivalent to 20% of heavy component feed amount, histidine The feed amount corresponds to 0.2% of the heavy component feed amount. The operating pressure o...

Embodiment 3

[0042] 3-methyl-3-buten-1-ol is refined and deweighted, and the tar composition is 3-methyl-3-buten-1-ol with a content of 20.00wt%, 3-methylene-1,5- The content of pentanediol and 3-methyl-2-pentene-1,5-pentanediol is 49.82wt%, the content of formic acid is 0.14wt%, the content of formaldehyde is 0.04wt%, and other components are 30.00wt%. An aqueous solution of arginine with a mass concentration of 1.19% is prepared. The total number of rectifying separation column trays is 30, and the tar oil after 3-methyl-3-butene-1-alcohol is refined and deweighted is fed from the 20th plate of rectification column at a rate of 1g / min, and the above-mentioned Concentration is that the aqueous solution of arginine of 1.19% is fed from the 10th tray plate of rectification column with the rate of 0.59g / min, thus the feed amount of calculating water is equivalent to 58.33% of heavy component feed amount, arginine The feed amount is equivalent to 0.70% of the heavy component feed amount. Th...

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Abstract

The invention provides the method for safely and efficiently improving the separation yield of the 3-methyl-3-butene-1-alcohol. According to the method, the TD24 of the tar after rectification and heavy component removal of the 3-methyl-3-butene-1-alcohol is improved, the safety of rectification operation is enhanced, meanwhile, the content of formaldehyde in the recovered 3-methyl-3-butene-1-alcohol is reduced, and the separation yield of the 3-methyl-3-butene-1-alcohol is improved.

Description

technical field [0001] The invention belongs to the field of chemical separation and recovery, and specifically relates to a method for safely and efficiently improving the separation yield of 3-methyl-3-butene-1-ol. Background technique [0002] 3-Methyl-3-buten-1-ol is the starting agent for the synthesis of high-efficiency water reducers, and it can also be used to synthesize methyl pyrethroids, intermediates of high-efficiency and low-toxicity pesticides such as pyrethroids. It is also an artificial The main raw material for the synthesis of citral. Citral is widely used and is an important raw material and precursor for the synthesis of ionone, methylionone, citronellol, geraniol, nerol, vitamin A and vitamin E, etc. [0003] In the prior art, isobutene and formaldehyde can efficiently prepare 3-methyl-3-buten-1-ol through condensation reaction, but in the reaction process, the disproportionation reaction of formaldehyde will generate formic acid and methanol, and thus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/82C07C29/94C07C33/025
CPCC07C29/82C07C29/94C07C33/025
Inventor 刘英俊孙钦鹤张永振庞计昌沈元伟朱小瑞张红涛
Owner WANHUA CHEM GRP CO LTD