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Pyridinesulfur dioxide and production technology thereof

A technology of sulfur dioxide and production process, applied in the direction of organic chemistry, etc., to achieve the effects of high product purity, high reaction speed and reduced labor intensity

Pending Publication Date: 2019-12-13
千福石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also do not see the report of large-scale production of pyridine sulfur dioxide in the prior art, therefore it is necessary to provide a kind of industrial production process of pyridine sulfur dioxide

Method used

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  • Pyridinesulfur dioxide and production technology thereof
  • Pyridinesulfur dioxide and production technology thereof
  • Pyridinesulfur dioxide and production technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare pyridine sulfur dioxide of the present invention, comprise the steps:

[0047] (1) Take 80 kg of pyridine with a high-precision electronic balance, filter and remove impurities with a 1 μm filter element, and put it into the reactor;

[0048] (2) To carry out the cooling treatment of the reaction device, the temperature in the control reactor is controlled to be 3-5°C;

[0049] (3) Accurately weigh sulfur dioxide and make it flow into the reaction kettle with an air flow of 75g / min, and start stirring simultaneously, the stirring speed is 95r / min, after reacting for 30min, adjust the internal pressure of the reaction device to be a negative pressure of 0.03-0.05MPa;

[0050] (4) Fully mix the reacted materials for 5 minutes, then filter at normal pressure, and fill to obtain pyridine sulfur dioxide. The temperature in the reaction kettle is 5-10° C. during filling.

Embodiment 2

[0052] Prepare pyridine sulfur dioxide of the present invention, comprise the steps:

[0053] (1) Take 80 kg of pyridine with a high-precision electronic balance, filter and remove impurities with a 1 μm filter element, and put it into the reactor;

[0054] (2) Perform cooling treatment on the reaction device, control the temperature in the reactor to be 5-10°C, and the pressure to be 0.03-0.05MPa;

[0055] (3) Accurately weigh sulfur dioxide and make it flow into the reaction kettle with an air flow of 65g / min, and start stirring at the same time, the mixer speed is 115r / min, after reacting for 30min, adjust the internal pressure of the reaction device to be a negative pressure of 0.03-0.05MPa;

[0056] (4) Fully mix the reacted materials for 5 minutes, then filter at normal pressure, and fill to obtain pyridine sulfur dioxide. During filling, the temperature in the reactor is 5-15° C. (stop cooling).

Embodiment 3

[0058] Prepare pyridine sulfur dioxide of the present invention, comprise the steps:

[0059] (1) Take 80 kg of pyridine with a high-precision electronic balance, filter and remove impurities with a 1 μm filter element, and put it into the reactor;

[0060] (2) Perform cooling treatment on the reaction device, control the temperature in the reactor to be 10-15°C, and the pressure to be 0.03-0.05MPa;

[0061] (3) Accurately weigh sulfur dioxide and allow it to flow into the reaction kettle with an air flow of 55g / min, and simultaneously start stirring, the stirrer rotating speed is 120r / min, after reacting for 30min, adjust the internal pressure of the reaction device to be a negative pressure of 0.03-0.05MPa;

[0062] (4) Fully mix the reacted materials for 5 minutes, then filter at normal pressure, and fill to obtain pyridine sulfur dioxide. During filling, the temperature in the reactor is 10-20° C. (stop cooling).

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Abstract

The invention discloses a pyridinesulfur dioxide and a production technology thereof. The production technology comprises the following steps: pyridine is accurately weighed, is filtered to remove impurities, and then is added into a reaction device; the reaction device is cooled, and the temperature in the reaction device is controlled to be 3-20 DEG C; then sulfur dioxide is accurately weighed,and flows into the reaction device, stirring is started, a reaction is performed for 30 min, and the pressure in the reaction device is adjusted to be a negative pressure; the reacted materials are fully mixed and dissolved; and the temperature in the reaction device is controlled to be 3-20 DEG C, normal pressure filtration is performed, and filling is performed to obtain the pyridinesulfur dioxide product. The temperature in the reaction device and the amount of reaction raw materials are accurately controlled during production of pyridinesulfur dioxide, so the obtained product has the advantages of high purity, stable content, high reaction speed and high yield, and the production technology has the advantages of small environmental pollution, simplicity and controllability in operation, and laying a foundation for large-scale production.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to pyridine sulfur dioxide and an industrial process for producing pyridine sulfur dioxide. Background technique [0002] In the prior art, due to factors such as stability, the synthesis of pyridine sulfur dioxide has not been mass-produced. As a pharmaceutical intermediate or intermediate raw material, pyridine sulfur dioxide can be used to prepare chemical products, pesticides, antibacterial agents, medicines, dyes, feedstuffs, etc. As well as chemical substances such as central nervous system stimulants, the application prospects are broad. There is no report on the large-scale production of pyridine sulfur dioxide in the prior art, so it is necessary to provide an industrial production process for pyridine sulfur dioxide. Contents of the invention [0003] Aiming at the defects in the prior art, the present invention provides a production process of pyridine sulfur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/127C07D213/16
CPCC07D213/127C07D213/16
Inventor 杨刚刘丹
Owner 千福石油化工有限公司
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