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Production method of DTBHQ (2-5-di-tert-butylhydroquinone)

A production method and crude product technology, applied in the production field of DTBHQ, can solve the problems of unscientific proportion of materials used, insufficient process control, and insufficient quality of finished products, so as to achieve the effect of improving quality, improving raw material utilization rate, and precise production process

Inactive Publication Date: 2011-09-21
GUANGZHOU TAIBANG FOOD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this kind of DTBHQ production method has many points to be improved, such as the proportion of materials used is not scientific enough, the production process is too simple, and the control of the process is not strict enough, so that the utilization rate of raw materials is relatively low, and the quality of the finished product is not enough at the same time high quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Pre-drying

[0029] Select 30g of yellow or white or other fresh light-colored TBHQ scraps, and dry them for about 24 hours. During the drying process, loosen the scraps with tools such as rakes, and obtain crude products after drying.

[0030] 2) Soak in hot water

[0031] Mix the crude product with 90ml of hot water at a temperature of 80°C to 90°C, soak and stir. The soaking time is about 0.5h. During the soaking period, if there are lumps, crush or remove them. After soaking, a crude product solution is obtained.

[0032] 3) Initial centrifugation

[0033] The crude product solution was detected 4 hours before the initial centrifugation, and if there were still lumps, they were crushed or discarded.

[0034] After the initial centrifugation of the crude product solution, wash and centrifuge repeatedly 4 times with 2 times the weight of the crude product solution in hot water at a temperature of 70°C to 90°C, and disperse the crude product solution as evenly as ...

Embodiment 2

[0046] 1) Pre-drying

[0047] Select 46g of yellow or white or other fresh light-colored TBHQ scraps, and dry them for about 24 hours. During the drying process, use tools such as rakes to loosen the scraps, and obtain crude products after drying.

[0048] 2) Soak in hot water

[0049] Mix the crude product with 109ml of hot water at a temperature of 80°C to 90°C, soak and stir. The soaking time is about 0.5h. If there are lumps during soaking, crush or remove them. After soaking, a crude product solution is obtained.

[0050] 3) Initial centrifugation

[0051] The crude product solution was detected 4 hours before the initial centrifugation, and if there were still lumps, they were crushed or discarded.

[0052] After the initial centrifugation of the crude product solution, use 3 times the weight of the crude product solution to wash and centrifuge repeatedly 4 times with hot water at a temperature of 70°C to 90°C, and disperse the crude product solution as evenly as possi...

Embodiment 3

[0064] 1) Pre-drying

[0065] Select 30g of yellow or white or other fresh light-colored TBHQ scraps, and dry them for about 24 hours. During the drying process, loosen the scraps with tools such as rakes, and obtain crude products after drying.

[0066] 2) Soak in hot water

[0067] Mix the crude product with 90ml of hot water at a temperature of 80°C to 90°C, soak and stir. The soaking time is about 0.5h. During the soaking period, if there are lumps, crush or remove them. After soaking, a crude product solution is obtained.

[0068] 3) Initial centrifugation

[0069] The crude product solution was detected 4 hours before the initial centrifugation, and if there were still lumps, they were crushed or discarded.

[0070] After the initial centrifugation of the crude product solution, wash and centrifuge repeatedly 4 times with 2 times the weight of the crude product solution in hot water at a temperature of 70°C to 90°C, and disperse the crude product solution as evenly as ...

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Abstract

The invention discloses a production method of DTBHQ (2-5-di-tert-butylhydroquinone), which comprises the following steps: predrying, soaking in hot water, carrying out primary centrifugalizing, soaking in a solvent, carrying out post centrifugalizing, drying, pulverizing and screening. In the invention, before the crude product is soaked, the crude product is soaked in hot water to remove part of TBHQ (tert-butylhydroquinone), so that the content of the TBHQ in the crude product is relatively decreased, and the content of the DTBHQ is relatively increased, thereby enhancing the quality of the final product; meanwhile, the mass ratio of tert-butyl alcohol to water is adjusted, and the utilization ratio of raw materials is increased; and in addition, the invention controls the overall production process more precisely, thereby being beneficial to obtaining the product with higher quality and saving the production cost, and obvious economic benefit can be obtained after large-scale production is implemented.

Description

technical field [0001] The invention relates to the technical field of the manufacturing process of 2,5-di-tert-butylhydroquinone, in particular to a production method of DTBHQ. Background technique [0002] DTBHQ, that is, 2,5-di-tert-butyl hydroquinone, its conventional production process is to mix a certain proportion of untreated raw materials (ie crude product) with tert-butanol and water in a ratio of 1:2:1 After being directly put into the solvent and soaked for a certain period of time, the preliminary finished product is obtained through the processes of centrifugation, drying, crushing, screening and packaging. The process of this kind of DTBHQ production method has many points to be improved, such as the proportion of materials used is not scientific enough, the production process is too simple, and the control of the process is not strict enough, so that the utilization rate of raw materials is relatively low, and the quality of the finished product is not enough...

Claims

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Application Information

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IPC IPC(8): C07C39/08C07C37/16
Inventor 卢俊青彭辉卫娜黄胜桥谢志峰
Owner GUANGZHOU TAIBANG FOOD TECH
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