CN1291966C - Synthesis of 5(6) caproleic acid - Google Patents

Synthesis of 5(6) caproleic acid Download PDF

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Publication number
CN1291966C
CN1291966C CN 200410021510 CN200410021510A CN1291966C CN 1291966 C CN1291966 C CN 1291966C CN 200410021510 CN200410021510 CN 200410021510 CN 200410021510 A CN200410021510 A CN 200410021510A CN 1291966 C CN1291966 C CN 1291966C
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China
Prior art keywords
decenoic acid
alkyl ketone
synthetic
butyl alkyl
essence
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CN 200410021510
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CN1597655A (en
Inventor
孙芝
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JINJU CHEMICAL PLANT DALIAN
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JINJU CHEMICAL PLANT DALIAN
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Abstract

The present invention relates to a synthetic method for 5(6)-decenoic acid, which belongs to the technical field of 5(6)-decenoic acid preparation. The present invention provides a new method for preparing the 5(6)-decenoic acid. The method is characterized by the synthesis of butyl alkyl ketone as a key intermediate in the synthesis of 5(6)-decenoic acid. The present invention synthesizes the butyl alkyl ketone without using any solvent, and cyclohexanone is condensed, dewatered and hydrogenated with butanal under the action of a bifunctional catalyst of palladium / aluminium oxide, and the preparation of the butyl alkyl ketone is realized by a one-step method. The present invention has the effects and benefits of little by-product, little pollution and high product purity, the purity of the butyl alkyl ketone obtained by simple distillation is 99.5%, and the reaction selection is 95%. The butyl alkyl ketone becomes lactone by the ring expansion of hydrogen peroxide, and finally, 5(6)-decenoic acid is obtained by ring opening under an acid condition. The 5(6)-decenoic acid is suitable for preparing cream essence, milk essence, yoghurt essence, strawberry essence, etc.

Description

Synthesizing of 5 (6)-decylenic acids
Technical field
The invention belongs to food and beverage preparation technical field.5 (6)-decylenic acids (milk lactone), trade name is the milk lactone, is the safe edible spices (registration number: 3742), also meet GB 2760-1996 " foodstuff additive use hygienic standard " simultaneously of U.S. flavouring agent producer association approval.It has strong milk fragrance, and lasting fragrance, is the important source material of milk, cream, cheese essence.
Background technology
Because range of application is extremely extensive, consumption is big, the study on the synthesis of relevant 5 (6)-decylenic acids road that appears in the newspapers more.In existent method, patent " 5 (6)-decylenic acids synthetic " (CN 1266841) is arranged, and its operational path is to be raw material with pimelinketone and butyraldehyde, through parlkaline condensation, selective hydrogenation, the hydrogen peroxide ring expansion is a lactone, and open loop obtains 5 (6)-decylenic acids under acidic conditions at last; Patent " a kind of novel process (CN1426992) for preparing decylenic acid; this invention provides a kind of technology for preparing decylenic acid; be to be that the product that raw material carries out after the alkaline condensation carries out selective hydrogenation with palladium carbon as catalyzer with aldehydes and cyclic ketones; the product of selective hydrogenation is after 20% Peracetic Acid oxidation, and the carclazyte open loop through handling with phosphoric acid obtains decylenic acid is arranged.Two kinds of methods have all that synthetic route is long, yield is low, and owing to use the alkali condensation to pollute shortcomings such as bigger, have limited mass production.
Summary of the invention
The novel method that the purpose of this invention is to provide a kind of preparation 5 (6)-decylenic acids.
Technical scheme of the present invention is be synthetic 5 (6)-decylenic acid key intermediate butyl alkyl ketone synthetic.Need not any solvent during synthetic butyl alkyl ketone, with pimelinketone under heterogeneous dual-function catalyst palladium/aluminium sesquioxide effect with butyraldehyde condensation, dehydration, hydrogenation, single stage method has realized the preparation of butyl alkyl ketone.Owing to be reflected under no any solvent and carry out, thereby simplified production process greatly, and eliminated pollution from beginning of production.Temperature of reaction 80-280 of the present invention ℃, be preferably in 100-200 ℃; Dropping into the raw material pimelinketone of reaction and the mol ratio of butyraldehyde is 10: 1 to 100: 10, and reaction catalyst system therefor amount is 3~8% of a material total amount, is preferably 5~6%; This reacts required hydrogen pressure is 0.1~10.0, preferably 4.0~5.0MPa; Catalyzer used herein all can be obtained by the traditional preparation process mode.
Effect of the present invention and benefit are that by product is few, and the product purity height is through simple distillation gained butyl alkyl ketone purity 99.5%, reaction preference 95%.This product is widely used in food and beverage, is applicable to type essence such as preparation cream, dairy products, sour milk and strawberry.
The butyl alkyl ketone of above-mentioned gained is a lactone through the hydrogen peroxide ring expansion again, and open loop obtains 5 (6)-decylenic acids under acidic conditions at last.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme.
Synthesizing of embodiment 1:2-butyl cyclohexanone
In autoclave, add 1090 gram (11 moles) pimelinketone, 270 gram (3.7 moles) butyraldehyde-ns and 70 gram 0.5%Pa/Al 2O 3Catalyzer.Charge into 1.0MPa hydrogen with behind the hydrogen exchange three times, be warming up to 110 ℃ (hydrogen pressure 3.5MPa) reaction 3 hours, be warming up to 160 ℃ (hydrogen pressure 5.0MPa) reaction then, need 10 hours approximately altogether to not inhaling till the hydrogen.Leach the catalyzer straight run distillation after the reactant cooling.Reclaim pimelinketone 705 grams, get 2-butyl cyclohexanone 462 grams (purity 99.5%).
Synthesizing of embodiment 2:5 (6)-decylenic acid
(1), the hydrogen peroxide complex compound is synthetic:
The 450g30% hydrogen peroxide adds 180g urea, and low-grade fever to 30 ℃ stirring and dissolving is cooled to 0 ℃ and folds complex compound, filter 264g.
(2), oxidation makes ε-decalactone
810ml formic acid (86%) adds the 162g complex compound, after the stirring and dissolving, adds 81g 2-butyl cyclohexanone, is warming up to 30 ℃ of stirring reactions (needing cooling) 1 hour.After having reacted, add 486ml water, extract extracting, be washed to neutrality with toluene, 126~130/4mmHg fraction 51.7g ε-decalactone (99% purity) is collected in underpressure distillation behind the piptonychia benzene.
(3), 5 (6)-decylenic acids is synthetic
54g ε-decalactone adds 49.5g sodium hydroxide in the 87g aqueous solution, 110 ℃ of following saponification 3 hours.The cooling back adds the mixing solutions acidifying of 60g sulfuric acid and 60g water, branch vibration layer.The mixing solutions that adds 50g sulfuric acid and 50g water again, back flow reaction 2 hours.Add the 100ml hexanaphthene, branch vibration layer, oil-reservoir water are washed till water layer PH=6, add the mixture of 0.5g carclazyte and 0.5g gac, reflux and stir decolouring in 15 minutes, filter, and the decylization hexane gets product 48g.

Claims (6)

1, a kind of 5 (6)-decylenic acids is synthetic, it is characterized in that with pimelinketone under heterogeneous dual-function catalyst palladium/alchlor effect with butyraldehyde condensation, dehydration, hydrogenation one-step synthesis 2-butyl cyclohexanone.
2, a kind of 5 (6)-decylenic acids according to claim 1 is synthetic, it is characterized in that reaction need not any solvent.
3, a kind of 5 (6)-decylenic acids according to claim 1 is synthetic, it is characterized in that dropping into the raw material pimelinketone of reaction and the mol ratio of butyraldehyde is 10: 1 to 100: 10.
4, a kind of 5 (6)-decylenic acids according to claim 1 and 2 is synthetic, it is characterized in that wherein said reaction is to carry out under 80-280 ℃ temperature.
5, a kind of 5 (6)-decylenic acids according to claim 1 is synthetic, it is characterized in that wherein catalyst levels is 3~8% of a material total amount.
6, a kind of 5 (6)-decylenic acids according to claim 1 is synthetic, it is characterized in that hydrogen pressure is 0.1~10.0MPa.
CN 200410021510 2004-07-19 2004-07-19 Synthesis of 5(6) caproleic acid Expired - Lifetime CN1291966C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200410021510 CN1291966C (en) 2004-07-19 2004-07-19 Synthesis of 5(6) caproleic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200410021510 CN1291966C (en) 2004-07-19 2004-07-19 Synthesis of 5(6) caproleic acid

Publications (2)

Publication Number Publication Date
CN1597655A CN1597655A (en) 2005-03-23
CN1291966C true CN1291966C (en) 2006-12-27

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103588633B (en) * 2013-11-22 2015-08-05 浙江安赛生物科技有限公司 The preparation technology of 5 (6)-decylenic acids
CN110128259A (en) * 2019-06-12 2019-08-16 广东广益科技实业有限公司 5 (6)-decene acid production process
CN110143866A (en) * 2019-06-12 2019-08-20 广东广益科技实业有限公司 5 (6)-decylenic acid synthetic method
CN110922324A (en) * 2019-10-24 2020-03-27 上海大学 Preparation method of 5(6) -decenoic acid
CN114075101A (en) * 2020-08-20 2022-02-22 中国科学院大连化学物理研究所 Preparation method of 2-alkyl cyclohexanone compound
CN114507123B (en) * 2020-11-17 2023-10-10 中国科学院大连化学物理研究所 Preparation method of 2-alkyl cyclohexanone homolog

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Assignee: DALIAN LUCK FINE CHEMICAL CO.,LTD.

Assignor: DALIAN JINJU CHEMICAL FACTORY

Contract fulfillment period: 2007.2.10 to 2017.2.10

Contract record no.: 2008210000068

Denomination of invention: Synthesis of 5 (6) - sebacic acid

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