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Synthesis process for TBHQ (Tertiary Butyl Hydroquinone) crude product

A synthesis process and crude product technology, applied in the field of synthesis technology of TBHQ crude product, can solve the problem of high utilization rate of raw materials, and achieve the effects of high utilization rate of raw materials and less 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 synthesis process of TBHQ crude product, which can produce higher purity TBHQ crude product under the situation of avoiding pollution to the environment, and the utilization rate of raw materials is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The synthetic technique of the TBHQ crude product of the present embodiment, comprises the steps:

[0029] 1) Pour 3 parts by weight of phosphoric acid and 0.2 parts by weight of water into the mixing tank, and then add 7 parts by weight of hydroquinone to the mixing tank for stirring;

[0030] 2) After stirring, put the mixed solution into the reactor and heat it to 55°C, then add 8 parts by weight of tert-butanol to the reactor;

[0031] 3) After heating up to 75°C, keep warm for 3 hours to react;

[0032] 4) The reaction product was centrifuged, washed with water, and dehydrated to obtain crude TBHQ.

[0033] The obtained crude TBHQ was detected, wherein the weight percentage of TBHQ was 99.3%, and the weight percentage of DTBHQ was 0.7%.

Embodiment 2

[0035] The synthetic technique of the TBHQ crude product of the present embodiment, comprises the steps:

[0036] 1) Pour 2 parts by weight of phosphoric acid and 0.1 parts by weight of water into the mixing tank, and then add 6 parts by weight of hydroquinone to the mixing tank for stirring;

[0037] 2) After stirring, put the mixed solution into the reactor and heat it to 58°C, then add 8 parts by weight of tert-butanol to the reactor;

[0038] 3) After heating up to 78°C, keep warm for 3 hours to react;

[0039] 4) The reaction product was centrifuged, washed with water, and dehydrated to obtain crude TBHQ.

[0040] The crude product of TBHQ detected, wherein the weight percentage of TBHQ is 99.4%, and the weight percentage of DTBHQ is 0.6%.

Embodiment 3

[0042] The synthetic technique of the TBHQ crude product of the present embodiment, comprises the steps:

[0043] 1) Pour 4 parts by weight of phosphoric acid and 0.4 parts by weight of water into the mixing tank, and then add 7 parts by weight of hydroquinone to the mixing tank for stirring;

[0044] 2) After stirring, put the mixed solution into the reactor and heat it to 60°C, then add 9 parts by weight of tert-butanol to the reactor;

[0045] 3) After heating up to 85°C, keep warm for 2 hours to react;

[0046] 4) The reaction product was centrifuged, washed with water, and dehydrated to obtain crude TBHQ.

[0047] The crude product of TBHQ detected, wherein the weight percentage of TBHQ is 99.4%, and the weight percentage of DTBHQ is 0.6%.

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Abstract

The invention discloses a synthesis process for a TBHQ (Tertiary Butyl Hydroquinone) crude product. The synthetic process comprises the following steps: 1) pouring 2-4 parts by weight of phosphoric acid and 0.1-0.4 parts by weight of water into a stirring cylinder, then adding 5-7 parts by weight of hydroquinone, and stirring; 2) putting the stirred mixture solution into a reaction kettle, heating to 55-65DEG C, and then feeding 7-9 parts by weight of tert-butyl alcohol into the reaction kettle; 3) after heating to 75-85DEG C, and insulating for two to three hours for reaction; 4) performing centrifugal separation, washing and dehydration on a reaction product, to obtain the TBHQ crude product. According to the preparation process for the TBHQ crude product, water instead of methylbenzene is adopted as a solvent, so that the pollution is less, the raw material utilization ratio is high, and the purity of the obtained TBHQ crude product is higher.

Description

technical field [0001] The invention relates to the technical field of production of TBHQ, in particular to a synthesis process of crude TBHQ. 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 is less toxic, and its main raw materials come from natural sources. Ions combine to develop color, thus destroying the original color ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/08C07C37/16
CPCC07C37/16C07C39/08
Inventor 卢俊青
Owner GUANGZHOU TAIBANG FOOD TECH
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