Technology for preparing tert-butylhydroquinone (TBHQ) quality goods

A preparation process and high-quality technology, which is applied in the field of TBHQ high-quality preparation technology, can solve the problem of high utilization rate of raw materials, and achieve the effect of high utilization rate of raw materials and low pollution

Inactive Publication Date: 2014-06-18
GUANGZHOU TAIBANG FOOD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a preparation process for TBHQ

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation technology of a kind of TBHQ high-quality goods of the present invention, comprises the steps:

[0026] 1) Pour 2-4 parts by weight of phosphoric acid and 0.1-0.4 parts by weight of water into the mixing tank, then add 5-7 parts by weight of hydroquinone to the mixing tank for stirring;

[0027] 2) After stirring, put the mixed solution into the reactor and heat it to 55°C-65°C, then add 7-9 parts by weight of tert-butanol to the reactor;

[0028] 3) After heating up to 75°C-85°C, keep warm for 2-3 hours to react;

[0029] 4) After the reaction product is centrifuged, washed and dehydrated, the crude product of TBHQ is obtained;

[0030] 5) Mix 1-3 parts by weight of acid with 93-96 parts by weight of water and heat it. When it is heated to 82°C-88°C, add 4.5-6.5 parts by weight of the TBHQ crude product prepared in step 4), and heat while stirring. To 92 ℃ ~ 95 ℃, the dissolution is complete;

[0031] 6) Perform the first centrifugal separation on th...

Embodiment 1

[0036] The preparation technology of the TBHQ high-quality goods of the present embodiment, comprises the steps:

[0037] 1) Pour 2 parts by weight of phosphoric acid and 0.1 part by weight of water into the mixing tank, and then add 5 parts by weight of hydroquinone to the mixing tank for stirring;

[0038] 2) After stirring, put the mixed solution into the reactor and heat it to 55°C, then add 9 parts by weight of tert-butanol to the reactor;

[0039] 3) After heating up to 75°C, keep warm for 3 hours to react;

[0040] 4) After the reaction product is centrifuged, washed and dehydrated, the crude product of TBHQ is obtained;

[0041] 5) Mix 2 parts by weight of acid and 93 parts by weight of water, and then heat. When heated to 82°C, add 4.5 parts by weight of crude TBHQ, heat while stirring, and heat to 92°C, and the dissolution is complete;

[0042] 6) Perform the first centrifugal separation on the solution in step 5), separate the water-insoluble DTBHQ from the crude ...

Embodiment 2

[0046] The preparation technology of the TBHQ high-quality goods of the present embodiment, comprises the steps:

[0047] 1) Pour 3 parts by weight of phosphoric acid and 0.4 parts by weight of water into the mixing tank, and then add 6 parts by weight of hydroquinone to the mixing tank for stirring;

[0048] 2) After stirring, put the mixed solution into the reactor and heat it to 58°C, then add 9 parts by weight of tert-butanol to the reactor;

[0049] 3) After heating up to 78°C, keep warm for 2 hours to react;

[0050] 4) After the reaction product is centrifuged, washed and dehydrated, the crude product of TBHQ is obtained;

[0051]5) Mix 3 parts by weight of acid and 94 parts by weight of water, and then heat. When heated to 84°C, add 5 parts by weight of crude TBHQ, heat while stirring, and heat to 93°C, and the dissolution is complete;

[0052] 6) Perform the first centrifugal separation on the solution in step 5), separate the water-insoluble DTBHQ from the crude TB...

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Abstract

The invention discloses a technology for preparing tert-butylhydroquinone (TBHQ) quality goods. The technology comprises the following steps: 1) pouring 2-4 parts by weight of phosphoric acids and 0.1-0.4 part by weight of water into a mixing cylinder, and then adding 5-7 parts by weight of hydroquinone to the mixing cylinder to agitate; 2) putting a mixed solution into a reaction kettle to heat to 55-65 DEG C after agitating, and then feeding 7-9 parts by weight of tertiary butanol to the reaction kettle; 3) heating to 75-85 DEG C, and then preserving heat for 2-3 hours to react; 4) centrifugally separating, washing and dewatering a reaction product to obtain a TBHQ crude product; 5) heating 1-3 parts by weight of acids and 93-96 parts by weight of water after mixing, adding 4.5-6.5 parts by weight of TBHQ crude product when heating to 82-88 DEG C, heating while agitating, and heating to 92-95 DEG C; and 6) carrying out the first centrifugal separation on the solution obtained in the step 5), separating out DTBHQ (ditert-butylhydroquinone) which is not dissolved into water in TBHQ, and then cooling the solution, carrying out the second centrifugal separation when cooling to below 45 DEG C, washing, dewatering and baking the obtained TBHQ crystal, so as to obtain the TBHQ quality goods.

Description

technical field [0001] The invention relates to the technical field of production of TBHQ, in particular to a preparation process of TBHQ high-quality goods. Background technique [0002] Oil and fat-rich products often undergo oxidative deterioration during storage and transportation. After oxidation, the product will change color, produce peculiar smell, destroy the nutrients in it, and produce harmful substances at the same time, seriously reducing the product quality. In order to prevent or delay the occurrence of these situations, it is common practice to add antioxidant ingredients in it. Approved by FAO / WHO, the currently approved synthetic antioxidants for food mainly include BHT, BHA, PG, TBHQ, etc. Among them, BHT is cheap, but highly toxic; BHA has also been found to be carcinogenic in recent years, and many countries have begun to ban it; PG has low toxicity, and the main raw materials are natural, and the potential risk is relatively small, but it is easy to m...

Claims

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Application Information

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IPC IPC(8): C07C39/08C07C37/16C07C37/72
CPCC07C37/16C07C37/685C07C39/08
Inventor 卢俊青
Owner GUANGZHOU TAIBANG FOOD TECH
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