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Activated carbon recycling process in aspirin production

A technology of aspirin and activated carbon, which is applied in the field of medicine and chemical industry, can solve the problems of restricting the production of aspirin, not being able to reduce costs, stop working, etc., and achieve the effects of easy automatic control and operation, reducing raw material costs, and simplifying the process flow

Inactive Publication Date: 2013-01-30
SHANDONG XINHUA PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to increasingly stringent safety and environmental protection requirements, if the generation of waste activated carbon is not reduced in time, it will become a major obstacle restricting the production of aspirin. Not only will the cost not be reduced, but the entire production line may be shut down.

Method used

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  • Activated carbon recycling process in aspirin production
  • Activated carbon recycling process in aspirin production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Open the liquid outlet valve at the bottom of the multifunctional filter 3, open the feed valve of the multifunctional filter 3 to feed the material, and after the refined filtration of sodium salicylate is completed, open the valve on the pipeline from filter 1 to multifunctional filter 3, and use An appropriate amount of soda water washes down the active carbon in the filter 2, and pumps it into the multifunctional filter 3 until the filter 2 sight glass flushing liquid is clarified, then stop the pump.

[0037] 2. Start to use feed pressure filtration, and the filtrate enters the sewage tank from the outlet pipe.

[0038] 3. Turn on the stirring rotation switch, and use the stirring rotation to assist in accelerating the filtration.

[0039] 4. Activated carbon regeneration: After the whole batch of 50kg (dry product) of activated carbon enters the multi-functional filter 3, close the feed valve, open the compressed air inlet valve on the multi-functional filter 3...

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PUM

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Abstract

Belonging to the fields of pharmaceuticals and chemicals, the invention relates to an activated carbon recycling process in aspirin production. The process is characterized by: subjecting waste activated carbon discharged from a salicylic acid refining tank to filtering by a filter, transferring the activated carbon to a multi-functional filtering machine to conduct recycling, and then transferring the recycled activated carbon back to the salicylic acid refining tank. The process reduces the cost of raw materials, and also improves the clean production effect. Before recycling, the unit consumption of activated carbon is 0.015kg / kg, and after recycling, the unit consumption is decreased to 0.008kg / kg. In terms of 5000t / y, annually 5000*1000*(0.015-0.008)=35000kg of activated carbon can be saved, with the saved amount being equivalent to 35000*7.2=252000 RMB yuan.

Description

technical field [0001] The invention relates to a process for producing and recovering regenerated activated carbon from aspirin, which belongs to the field of medicine and chemical industry. Background technique [0002] Activated carbon is a commonly used decolorizing agent in the field of medicine and chemical industry. Salicylic acid is used in crystallization. It is disposed of as waste after use, and the government also manages it as hazardous waste. Therefore, under the pressure of safety and environmental protection, waste activated carbon is disposed of work is becoming more and more prominent. Our company produces about 5,000 tons of salicylic acid per year. Based on the unit consumption of 0.016kg / kg in 2010, 5,000*0.016*1,000=80,000kg of activated carbon is needed, and the treatment cost is about 170,000 yuan. Due to the increasingly stringent safety and environmental protection requirements, if the generation of waste activated carbon is not reduced in time, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20
Inventor 李其奎吴孝好杨斌韩新利
Owner SHANDONG XINHUA PHARMA CO LTD
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