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preparation c 2‑10 Alkanediol method

An alkanediol and branched-chain alkyl technology, applied in the field of preparing C2-10 alkanediol, can solve the problems of poor catalyst stability, easy loss of active components and the like

Active Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the prior art has the problems of poor catalyst stability and easy loss of active components, and a new method for preparing C 2-10 Alkanediol method

Method used

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  • preparation c <sub>2‑10</sub> Alkanediol method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Magnetic Fe 3 o 4 Preparation of nanoparticles: 14.12g Fe(acac) 3 Dissolve in a mixed solution composed of 200mL oleylamine and 200mL dibenzyl ether, treat the solution at 110°C for 1 hour under the protection of nitrogen, then continue to treat it at 300°C for 2 hours under the protection of nitrogen, add 100mL of ethanol, and centrifuge to obtain The solid was washed 3 times with 100 mL of acetone, and the obtained solid was dried in a vacuum oven to obtain magnetic Fe 3 o 4 The nanoparticle A1 was characterized by a transmission electron microscope, and it was found that the average particle size of the nanoparticle was 9.5 nm.

[0082] Treatment of chlorosilicate: 10.0g magnetic Fe 3 o 4 Nanoparticles A1 were placed in a 500mL three-necked bottle, and then 200mL of anhydrous toluene, 2.0g of γ-chloropropyl triethoxysilane (γ-chloropropyl triethoxysilane, CPTES, C3 h 6 ClSi(OC 2 h 5 ) 3 ), reflux at 110°C for 24 hours, filter, wash with absolute ethanol for ...

Embodiment 2

[0086] Magnetic Fe 3 o 4 Preparation of nanoparticles: 14.12g Fe(acac) 3 Dissolve in a mixed solution composed of 400mL oleylamine and 50mL dibenzyl ether, treat the solution at 80°C under nitrogen protection for 5 hours, then continue to treat it at 350°C under nitrogen protection for 4 hours, add 100mL of ethanol, and centrifuge to obtain The solid was washed 3 times with 100 mL of acetone, and the obtained solid was dried in a vacuum oven to obtain magnetic Fe 3 o 4 The nanoparticle A2 was characterized by a transmission electron microscope, and it was found that the average particle diameter of the nanoparticle was 5.9 nm.

[0087] Treatment of chlorosilicate: 10.0g magnetic Fe 3 o 4 Nanoparticles A2 were placed in a 500mL three-necked bottle, and then 200mL of anhydrous toluene, 0.2g of γ-chloropropyl triethoxysilane (γ-chloropropyl triethoxysilane, CPTES, C 3 h 6 ClSi(OC 2 h 5 ) 3 ), refluxed for 6 hours, filtered, washed 3 times with absolute ethanol, and drie...

Embodiment 3

[0091] Magnetic Fe 3 o 4 The preparation method of nanoparticle A2 is the same as [Example 2], and the process of chlorosilicate treatment is the same as [Example 1], except that the chlorosilicate used is CPTMS: 3-chloropropyl trimethoxysilane (3-chloropropane Trimethoxysilane), the structural formula is ClC 3 h 6 Si(OCH 3 ) 3 , the carrier B3 was obtained, and after weighing, it was found that the chlorosilicate and magnetic Fe on B3 3 o 4 The weight ratio of nanoparticles is 0.069.

[0092] The quaternary phosphonium process is the same as the quaternary phosphonium process described in [Example 1], except that the tertiary phosphine used is trioctylphosphine, and the obtained Cl-type supported quaternary phosphonium salt C3.

[0093] Cl - The transformation of the supported quaternary phosphonium salt of the type is the same as the process described in [Example 1] to obtain catalyst D3, wherein the weight content of the quaternary phosphonium salt component is 10.5...

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Abstract

The invention relates to a method for preparing C2-10 alkanediol. With prior arts, catalyst stability is poor, and active component is prone to loss. The method mainly aims at solving the above problems. The catalyst adopted by the invention is a supported quaternary phosphonium catalyst with a following average structural formula (1). The method can be used in industrial production for preparing C2-10 alkanediol through C2-10 alkylene carbonate hydrolysis.

Description

technical field [0001] The present invention relates to a kind of preparation C 2-10 Alkanediol method. Background technique [0002] The hydrolysis of esters is an important chemical reaction, which is widely used in various fields of petrochemical production, among which the hydrolysis of cyclic carbonates, such as ethylene carbonate (EC), propylene carbonate, etc., has a very important basic position . [0003] The hydrolysis of ethylene carbonate is an important step in the production of ethylene glycol (EG) by the two-step catalytic hydration of ethylene oxide (EO). Ethylene glycol is an important organic chemical raw material, mainly used to produce polyester fiber, antifreeze, unsaturated polyester resin, nonionic surfactant, ethanolamine and explosives. The production technology of ethylene glycol is mainly divided into petrochemical route and non-petrochemical route. In the petrochemical route, there are direct hydration of ethylene oxide and catalytic hydration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/20C07C29/09B01J31/02
CPCY02P20/52
Inventor 陈梁锋何文军
Owner CHINA PETROLEUM & CHEM CORP
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