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A kind of preparation method of sulfone

A catalyst bed and logistics technology, which is applied in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc. problems such as increased pressure drop, to achieve the effect of prolonging stable operation time, reducing system energy consumption, and suppressing pressure drop increase

Active Publication Date: 2020-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that when using a fixed bed reactor to prepare sulfone by contacting sulfides and oxidants with molecular sieves, as the reaction time prolongs, the pressure drop of the catalyst bed increases, which leads to increased energy consumption of the system and affects the stability of the reactor. In view of the technical problems of safety and safety, a preparation method of sulfone is provided, which can effectively suppress the tendency of the pressure drop of the catalyst bed during the long-term continuous reaction process, prolong the stable operation time of the device, and improve the safety of the device operation

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  • A kind of preparation method of sulfone
  • A kind of preparation method of sulfone
  • A kind of preparation method of sulfone

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preparation example Construction

[0012] The present invention provides a method for the preparation of sulfones, the method comprising providing a reaction feed comprising at least one thioether, at least one oxidizing agent and optionally at least one solvent.

[0013] The thioether refers to a compound containing an -S- bond in the molecular structure. Preferably, the thioether is selected from thioethers with 2-18 carbon atoms, more preferably dimethyl sulfide and / or benzyl Thioether.

[0014] The oxidizing agent can be various substances sufficient to oxidize thioethers to sulfones. The method of the present invention is especially suitable for the occasion of preparing sulfone by oxidizing thioether with peroxide as an oxidizing agent. The peroxide refers to a compound containing -O-O-bonds in its molecular structure, which can be selected from hydrogen peroxide, organic peroxides and peracids. The organic peroxide refers to a substance obtained by replacing one hydrogen atom or two hydrogen atoms in a...

preparation Embodiment 1

[0110] In this preparation example, a vanadium-free titanium-silicon molecular sieve was prepared by hydrothermal crystallization.

[0111] Mix ethyl orthosilicate, titanium isopropoxide and tetrapropyl ammonium hydroxide, and add an appropriate amount of distilled water to stir and mix. The molar ratio of ethyl orthosilicate: titanium isopropoxide: tetrapropyl ammonium hydroxide: water is 100:3:20:2000, among them, ethyl orthosilicate with SiO 2 In terms of titanium isopropoxide as TiO 2 hydrolyze at normal pressure and 60°C for 1 hour, then stir at 75°C for 3 hours, then put the mixed solution into a stainless steel sealed reaction kettle, and place it at a constant temperature of 170°C for 72 hours to obtain a mixture of crystallized products; The mixture was filtered, and the solid phase was collected, washed with water, and dried at 110° C. for 60 minutes to obtain a molecular sieve powder. The raw molecular sieve powder was roasted in an air atmosphere at 550°C for 3 h...

preparation Embodiment 2

[0113] In this preparation example, a vanadium-titanium-silicon molecular sieve was prepared by a hydrothermal crystallization method.

[0114] Mix ethyl orthosilicate, ammonium metavanadate, titanium isopropoxide and tetrapropyl ammonium hydroxide, and add an appropriate amount of distilled water to stir and mix, ethyl orthosilicate: titanium isopropoxide: ammonium metavanadate: tetrapropyl The molar ratio of ammonium hydroxide: water is 100:3:1:20:2000, wherein, ethyl orthosilicate is SiO 2 In terms of titanium isopropoxide as TiO 2 In terms of ammonium metavanadate in V 2 o 5 Meter; hydrolyze at normal pressure and 60°C for 1 hour, then stir at 75°C for 3 hours, then put the mixed solution into a stainless steel sealed reaction kettle, and place it at a constant temperature of 170°C for 72 hours to obtain a mixture of crystallized products; filter the mixture , the solid phase was collected, washed with water, and dried at 110° C. for 60 minutes to obtain a molecular sie...

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Abstract

The invention discloses a method for preparing sulphone. The method comprises the steps that a reaction feed material comprising at least one thioether, at least one oxidant and optionally at least one solvent is provided, is introduced into a first catalyst bed layer, and flows through n catalyst bed layers from the first catalyst bed layer to an nth catalyst bed, wherein the catalyst bed layer is filled with a molecular sieve-containing catalyst and acidic ion exchange resin, and when the total pressure drop of the catalyst bed layers is higher than the initial total pressure drop, the feedmaterial of the first catalyst bed layer is divided into f material streams; and the first material stream is introduced into the first catalyst bed layer, and the remaining material streams except the first material stream are introduced into the catalyst bed layers arranged at downstream positions of the first catalyst bed layer. Sulphone is prepared through oxidation of thioether by using the method, the tendency of pressure drop increase of the catalyst bed layers in the long-time continuous reaction process can be inhibited effectively, energy consumption of the system can be reduced, andthe stable operation time of the device can be prolonged.

Description

technical field [0001] The invention relates to a preparation method of sulfone. Background technique [0002] As a typical representative of sulfone substances, dimethyl sulfone is a white crystalline powder, easily soluble in water, ethanol, benzene, methanol and acetone, and slightly soluble in ether. Potassium permanganate cannot be discolored at room temperature, and strong oxidizing agents can oxidize dimethyl sulfone to methanesulfonic acid. Dimethyl sulfone is used in industry as a high-temperature solvent and raw material for organic synthesis, as a stationary liquid for gas chromatography, as a analytical reagent, as a food additive, and as a drug. As an organic sulfide, dimethyl sulfone can enhance the ability of the human body to produce insulin, and at the same time, it can also promote the metabolism of carbohydrates. It is a necessary substance for the synthesis of human collagen. Dimethyl sulfone can promote wound healing, and it can also play a role in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C315/02C07C317/04B01J29/89B01J29/78
Inventor 史春风朱斌林民
Owner CHINA PETROLEUM & CHEM CORP