Para toluene sulfonate continuous drying method

A technology of p-toluenesulfonamide and drying method, which is used in progressive dryers, drying solid materials, and drying solid materials without heating, etc., can solve the problems of low drying rate and efficiency, unstable product quality, and high operating intensity. , to achieve the effect of fast drying speed, stable product quality and uniform heating

Pending Publication Date: 2018-09-04
浙江嘉化新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing p-toluenesulfonamide drying process adopts the traditional batch drying method, which uses atmospheric hot water to dry the material to remove water and ethanol. The latent heat of water is large, the material is large, the drying rate and efficiency are very low, and the intermittent operation is intensive and time-consuming. Long, unstable product quality

Method used

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  • Para toluene sulfonate continuous drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The feed buffer chamber breaks the vacuum and reaches normal pressure. After the reaction, the p-toluenesulfonamide material containing 10% water and alcohol enters the feed buffer chamber, and the feed buffer chamber is evacuated to a vacuum of 0.098MPa. The valve between the warehouse and the feed buffer tank, the pressure is balanced, the material enters the feed buffer tank, the valve of the feed buffer tank and the feed control warehouse is opened, the material enters the feed control warehouse, and then the material passes through the feed rotary valve Reach the track.

[0042]After the material reaches the track in the barrel, it passes through the 1st, 2nd, 3rd, 4th, 5th, 6th, and 7th track respectively, and passes through the 1st temperature section 70 from top to bottom. ~80℃, the 2nd and 3rd temperature section is 60~70℃, the 4th and 5th temperature section is 50~60℃, the 6th and 7th temperature section is 40~50℃, and the 7th last heating plate cools down Se...

Embodiment 2

[0046] The feed buffer chamber breaks the vacuum and reaches normal pressure. After the reaction, the p-toluenesulfonamide material containing 10% water and alcohol enters the feed buffer chamber, and the feed buffer chamber is evacuated to a vacuum of 0.098MPa. The valve between the warehouse and the feed buffer tank, the pressure is balanced, the material enters the feed buffer tank, the valve of the feed buffer tank and the feed control warehouse is opened, the material enters the feed control warehouse, and then the material passes through the feed rotary valve Reach the track.

[0047] After the material reaches the track in the barrel, it passes through the 1st, 2nd, 3rd, 4th, 5th, 6th, and 7th track respectively, and passes through the first temperature section 80 from top to bottom. ~85℃, the 2nd and 3rd temperature range is 75~80℃, the 4th and 5th temperature range is 65~75℃, the 6th and 7th temperature range is 45~65℃, the last heating plate in the 7th cooling down ...

Embodiment 3

[0051] The feed buffer chamber breaks the vacuum and reaches normal pressure. After the reaction, the p-toluenesulfonamide material containing 10% water and alcohol enters the feed buffer chamber, and the feed buffer chamber is evacuated to a vacuum of 0.098MPa. The valve between the warehouse and the feed buffer tank, the pressure is balanced, the material enters the feed buffer tank, the valve of the feed buffer tank and the feed control warehouse is opened, the material enters the feed control warehouse, and then the material passes through the feed rotary valve Reach the track.

[0052] After the material reaches the track in the barrel, it passes through the 1st, 2nd, 3rd, 4th, 5th, 6th, and 7th track respectively, and passes through the first temperature section 80 from top to bottom. ~89℃, the 2nd and 3rd temperature range is 70~80℃, the 4th and 5th temperature range is 60~70℃, the 6th and 7th temperature range is 45~60℃, the last heating plate in the 7th cooling down ...

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Abstract

The invention discloses a para toluene sulfonate continuous drying method which adopts a crawler type continuous drying method. A baffling type channel formed by an upper heating slab and a lower heating slab which are on a crawler and middle solid square steel allows materials to be distributed uniformly, the surface is heated uniformly, a fluid medium flows without a dead angle, and water, alcohol and low boiling impurities are evaporated more easily; with the combination of vacuumizing, a feeding bin and a discharge bin are designed like a space capsule, so that the impurities such as waterand alcohol are removed more easily; and the para toluene sulfonate continuous drying method has the advantages of high drying rate, high evaporation intensity, short time and stable product quality.

Description

technical field [0001] The invention relates to a continuous drying process for amides, in particular to a continuous drying method for p-toluenesulfonamide. Background technique [0002] p-toluenesulfonamide is a very important organic synthetic drug intermediate, commonly used in the synthesis of dozens of drugs such as chloramphenicol, chloramine-T, and thiamphenicol. [0003] The existing p-toluenesulfonamide drying process adopts the traditional batch drying method, which uses atmospheric hot water to dry the material to remove water and ethanol. The latent heat of water is large, the material is large, the drying rate and efficiency are very low, and the intermittent operation is intensive and time-consuming. Long, the product quality is unstable. Contents of the invention [0004] In order to solve the above-mentioned problems in the prior art, the present invention proposes a continuous drying method for p-toluenesulfonamide, which adopts a crawler-type continuous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B15/12F26B23/10F26B5/04F26B25/00
CPCF26B5/04F26B15/12F26B23/10F26B25/00
Inventor 王宏亮胡文俊徐文梅吴忠周航峰沈文明
Owner 浙江嘉化新材料有限公司
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