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Heterogenous catalyst, and method for coproducing 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran

A heterogeneous catalyst, tetrahydrofuran technology, applied in 1 field, can solve the problems of increased production cost, increased energy consumption, strong corrosion of sulfuric acid, etc., and achieve the effects of simplifying the production process, avoiding loss, and simplifying steps

Inactive Publication Date: 2013-07-17
CHINA PETROCHEM DEVMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent No. 4665205 proposes a method for dehydrating and cyclizing 1,4-butanediol into THF with sulfuric acid as a catalyst. The conversion rate is close to 99.9%, but sulfuric acid is highly corrosive and increases the cost of process equipment
Japanese Patent No. 481075 proposes a method using alumina as a catalyst. This method needs to vaporize butanediol first, and then conduct a gas-solid phase reaction at 250°C. The disadvantage of the reaction is that the catalyst treatment efficiency is low, resulting in increased production costs.
However, the above method needs to reclaim the γ-butyrolactone in the toluene solution because γ-butyrolactone is easily soluble in toluene, resulting in increased energy consumption and catalyst loss

Method used

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  • Heterogenous catalyst, and method for coproducing 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran
  • Heterogenous catalyst, and method for coproducing 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran
  • Heterogenous catalyst, and method for coproducing 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Catalyst preparation

[0023] Dissolve 0.236 g of ruthenium chloride and 0.078 g of ferric nitrate in 15 ml of deionized water, add 1.28 g of polymer stabilizer polyvinylpyrrolidone, and then add 0.52 ml of formaldehyde as a reducing agent, and stir evenly in an alkaline environment. It is dissolved, then washed with acetone, and the black colloidal solution is taken out and dried. After the drying is completed, mix it with 5.735ml deionized water, 1.695ml ammonia water, 33.215ml ethanol until they are mutually soluble, then add 2.675g template tetraethyloxysiloxane (TEOS), stir for 24 hours, take out the black colloid Solution and dry. Then calcined in an air atmosphere at 400°C for 3 hours, and then calcined in an argon and hydrogen mixed gas atmosphere for 3 hours to 5 hours, and the required inert carrier is silica and the weight ratio of Ru / Fe is 4:1 catalyst. The catalyst was nitrated with nitric acid, and the weight ratio of the metal content of the catalyst ...

Embodiment 2

[0033] The catalyst preparation of Example 1 was repeated. The catalyst of Example 1 was used for the hydrogenation reaction test, and the reaction temperature was adjusted to 220°C. According to the experimental results in Table 2, as the reaction temperature increases, the yields of γ-butyrolactone and tetrahydrofuran increase substantially.

[0034] Table II

[0035]

Embodiment 3

[0037] The catalyst preparation of Example 1 was repeated. The catalyst of Example 1 was used for hydrogenation reaction test. Adjust the reaction pressure to 300 psig. It can be seen from the experimental results in Table 3 that reducing the reaction pressure is beneficial to increase the yield of γ-butyrolactone

[0038] Table Three

[0039]

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PUM

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Abstract

A heterogenous catalyst, and a method for coproducing 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran are provided. The method comprises using a hydrogenation of the heterogenous catalyst having a first reactive metal and a second reactive metal to catalyze an aldehydes mixture containing 4-hydroxybutyraldehyde to obtain the 1,4-butanediol, gamma-butyrolactone and tetrahydrofuran.

Description

Technical field [0001] The present invention relates to the preparation of 1,4-butanediol and a method for co-producing its derivatives, in particular, to the preparation of 1,4-butanediol and its derivatives in the presence of a heterogeneous catalyst with at least two active metals Methods. Background technique [0002] 1,4-Butanediol (BDO) is an important organic and fine chemical raw material. It is widely used in the fields of medicine, chemical industry, textile, papermaking, automobile and daily chemical industry. And from butanediol can produce tetrahydrofuran (tetrahydrofuran, referred to as THF), polybutylene terephthalate (polybutylene terephthalate, referred to as PBT), gamma butyrolactone (gamma butyrolactone, referred to as GBL), methyl pyrrolidone ( 1-Methyl-2-pyrrolidone, referred to as NMP) and polyurethane resin (PU resin) and other important specialized materials (Specialty Chemicals) and solvents. Tetrahydrofuran is an excellent solvent for many substances. ...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C31/10C07C31/12C07C29/141C07D307/08C07D307/33B01J23/89B01J23/46
Inventor 柳佑樵李进义蔡嘉荣
Owner CHINA PETROCHEM DEVMENT
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