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Preparation process of sulfonyl isocyanate with high conversion rate

A technology with high conversion rate of sulfonyl isocyanate, applied in the preparation of sulfonyl amide, organic chemistry, chemical instruments and methods, etc., can solve the problems of long cycle, low precision of phosgene introduction, complicated preparation process, etc., and achieve convenient operation , Improve the preparation conversion rate, improve the effect of the reaction effect

Pending Publication Date: 2021-11-12
ANHUI GUANGXIN AGROCHEM
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of sulfonyl isocyanate preparation process with high conversion rate, to solve the existing sulfonyl isocyanate preparation process proposed in the above-mentioned background technology is complex, the cycle is longer, and the feeding precision of the gas is lower during preparation question

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  • Preparation process of sulfonyl isocyanate with high conversion rate
  • Preparation process of sulfonyl isocyanate with high conversion rate
  • Preparation process of sulfonyl isocyanate with high conversion rate

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0034] see Figure 1-7 , an embodiment provided by the present invention: a process for preparing sulfonyl isocyanate with high conversion rate, the sulfonyl isocyanate with high conversion rate is processed by a preparation device, and the preparation device includes a first reaction kettle 1, a second reaction kettle 2, a second reaction kettle Three reaction kettles 3, cover plates 4, heating and cooling jackets 5, motors 6, temperature controllers 7, pressurizing pumps 8, pressurizing pipes 9, solid phosgene dripping tanks 10, liquid outlet pipes 11, first solenoid valves 12 , measuring cylinder 13, force measuring rod 14, weighing and measuring module 15, first ...

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Abstract

The invention discloses a preparation process of sulfonyl isocyanate with a high conversion rate, relates to the technical field of sulfonyl isocyanate preparation, and aims to solve the problems that an existing sulfonyl isocyanate preparation process is complex and relatively long in period, and the introduction precision of phosgene is relatively low during preparation. The preparation process comprises the following steps: step 1, opening a second valve, adding chlorobenzene sulfonamide and xylene into a first reaction kettle through a feeding pipe, closing the second valve, regulating and controlling the temperature of a heating and cooling sleeve to 100 DEG C through a temperature controller, carrying out heating azeotropic distillation to remove moisture, driving a mixing rod and an auxiliary rod to rotate by a motor, and mixing 4-chlorobenzenesulfonamide and xylene to obtain sulfanilamide slurry; and step 2, enabling a pressure pump of the first reaction kettle to work, applying pressure to the first reaction kettle through a pressure pipe, opening a first valve of the first reaction kettle, discharging the sulfanilamide slurry through a discharging pipe, then placing the sulfanilamide slurry in a second reaction kettle, and adding xylene and an n-butyl isocyanate catalyst.

Description

technical field [0001] The invention relates to the technical field of sulfonyl isocyanate preparation, in particular to a preparation process of sulfonyl isocyanate with high conversion rate. Background technique [0002] Sulfonyl isocyanate is a chemical product widely used in various industries, such as pharmaceutical industry, pesticide industry, rubber manufacturing industry, etc. promote. [0003] However, the existing sulfonyl isocyanate preparation process is complicated, the cycle is long, and the precision of gas injection is low during preparation, so it does not meet the existing needs. For this, we propose a sulfonyl isocyanate preparation process with high conversion rate . Contents of the invention [0004] The object of the present invention is to provide a kind of sulfonyl isocyanate preparation process with high conversion rate, to solve the existing sulfonyl isocyanate preparation process proposed in the above-mentioned background technology is complex...

Claims

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Application Information

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IPC IPC(8): B01J19/18B01J4/02B01J19/00C07C303/36C07C311/65
CPCB01J19/18B01J19/0066B01J19/0053B01J19/0013B01J4/02C07C303/36C07C311/65
Inventor 庞有顺陈小军王震宇刘长庆潘荣欢张孝国
Owner ANHUI GUANGXIN AGROCHEM
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