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Technology of synthesizing tert-amyl alcohol based on catalytic distillation solvent method

A technology of catalytic distillation and catalytic distillation column, which is applied in the field of hydration to generate tert-amyl alcohol based on the catalytic distillation of C5 fractions by solvent method, can solve the problems of poor tert-pentene conversion rate and reaction selectivity, etc., so as to reduce energy consumption and improve reaction selectivity. The effect of sex, simple process

Pending Publication Date: 2019-08-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0012] For this reason, the technical problem to be solved by the present invention is to provide a kind of technique based on catalytic distillation solvent method synthetic tert-amyl alcohol, to solve the conversion rate of tert-amyl alcohol in the technology that tert-amylene hydration generates tert-amyl alcohol in the prior art and the problem of poor reaction selectivity

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  • Technology of synthesizing tert-amyl alcohol based on catalytic distillation solvent method

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Embodiment 1

[0034] see figure 1 As shown in the process flow diagram, the process for synthesizing tert-amyl alcohol based on the catalytic distillation solvent method described in this embodiment is a C5 fraction and water with a tert-amylene content of 40% (m / m) as raw materials, and ethylene glycol Butyl ether is the solvent, with DOO6 as the catalyst of the hydration reaction; wherein, the control space velocity is 0.50h -1 , Ethylene glycol butyl ether: water (v / v) = 3: 1, water: tert-amylene (mol) = 5: 1, reaction zone temperature 61-64 ° C, pressure 0.27 MPa, reflux ratio R=2, carry out hydration reaction.

[0035] After the reaction, gas chromatographic analysis showed that the content of tert-amylene in the top C5 fraction was 6.8% (m / m), and the content of tert-amyl alcohol in the bottom product was 17.95% (m / m). The conversion of tert-amylene was calculated to be 89%, and the selectivity to tert-amyl alcohol was 99.2%.

Embodiment 2

[0037] see figure 1 As shown in the process flow diagram, the process for synthesizing tert-amyl alcohol based on the catalytic distillation solvent method described in this embodiment is a C5 fraction and water with a tert-amylene content of 40% (m / m) as raw materials, and ethylene glycol Butyl ether is the solvent, and DOO6 is the catalyst of the hydration reaction; wherein, the control space velocity is 1.0h -1 , Ethylene glycol butyl ether: water (v / v) = 4: 1, water: tert-amylene (mol) = 5: 1, reaction zone temperature 65-68 ° C, pressure 0.32 MPa, reflux ratio R=2, carry out hydration reaction.

[0038] After the reaction finished, it was known through gas chromatography analysis that the content of tert-amylene in the top C5 cut was 11.2% (m / m), and the content of tert-amyl alcohol in the tower bottom product was 15.53% (m / m). The conversion of tert-amylene was calculated to be 81%, and the selectivity to tert-amyl alcohol was 99.5%.

Embodiment 3

[0040] see figure 1 As shown in the process flow diagram, the process for synthesizing tert-amyl alcohol based on the catalytic distillation solvent method described in this embodiment is a C5 fraction and water with a tert-amylene content of 40% (m / m) as raw materials, and ethylene glycol Butyl ether is the solvent, and DOO6 is the catalyst of the hydration reaction; wherein, the control space velocity is 1.0h -1 , Ethylene glycol butyl ether: water (v / v) = 5: 1, water: tert-amylene (mol) = 5: 1, reaction zone temperature 65-68 ° C, pressure 0.32 MPa, reflux ratio R=2, carry out hydration reaction.

[0041] After the reaction finished, it was known through gas chromatography analysis that the content of tert-amylene in the top C5 cut was 11.2% (m / m), and the content of tert-amyl alcohol in the tower bottom product was 15.53% (m / m). The conversion of tert-amylene was calculated to be 81%, and the selectivity to tert-amyl alcohol was 99.5%.

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Abstract

The invention belongs to the technical field of chemical synthesis and particularly relates to a technology of hydrating tert-amyl alcohol based on a C5 fraction catalytic distillation solvent method.The technology of synthesizing tert-amyl alcohol based on the catalytic distillation solvent method comprises the steps of performing hydration reaction in a catalytic distillation tower to form required tert-amyl alcohol by taking C5 fraction rich in tert-pentene and water as raw materials and strong-acid cation exchange resin as a catalyst in the presence of an amphiprotic solvent, namely an ethylene glycol butyl ether solvent. Compared with commonly used catalytical technologies using an alcohol solvent or not using a solvent, and the traditional fixed bed hydration technology, the technology of generating tert-amyl alcohol increases a conversion rate of tert-pentene to above 80%, much greater than 48% of a fixed bed reactor; the selectivity of the whole reaction is further improved (from 90.3% to above 99%); the purpose of deep conversion of tert-pentene can be achieved; and at the same time, the whole technology has the advantages of simple flow and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a process for generating tert-amyl alcohol based on the hydration of carbon five fractions by catalytic distillation solvent method. Background technique [0002] Tert-amyl alcohol is a basic organic chemical raw material, mainly used in the production of new pesticides pinacolone, triadimefon, etc. It is also a raw material for the synthesis of spices, color film couplers, plasticizers, non-ferrous metal flotation In addition, tert-amyl alcohol can also be used as an additive in lubricating oil, hydraulic oil and other petroleum products, and in cellulose esters, cellulose ethers, coating paints, varnish solvents, nitro spray It is also widely used in production fields such as solvents, spices, mineral flotation agents, and antioxidants. [0003] At present, the industrial production of tert-amyl alcohol mainly adopts the acetone-acetylene method. The pro...

Claims

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Application Information

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IPC IPC(8): C07C31/125C07C29/04C07C29/80
CPCC07C29/04C07C29/80C07C31/125Y02P20/10
Inventor 董凌云郭岩锋彭光辉
Owner CHINA PETROLEUM & CHEM CORP
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