13/2/2014 CN103012132A Patent - Preparazione di acetato prenil - Google Patents

https://www.google.com/patents/CN103012132A?cl=en&dq=%221191-16-8%22+OR+%22prenyl+acetate%22+OR+%223-methyl-2-butenyl+acetate%22+… 1/3

Brevetti

CN103012132 A

Tipo di pubblicazione Applicazione

Numero della domanda CN 201210570822

Data di pubblicazione Apr 3, 2013

Data di deposito 26 dicembre 2012

Data di priorità 26 dicembre 2012

Inventori

Richiedente

Esporta citazione BiBTeX , EndNote , RefMan

Classificazione (2), Eventi legali (2)

Collegamenti esterni: SIPO , Espacenet

CLAIMS (3) tradotte dal cinese

1 sorbitol ester, characterized by comprising the steps of: (1) into the reactor in

acetic anhydride and sodium acetate, heated to 100 ° C after the dropwise

addition, glutaric enol 100-110 ° c, After dropping the reaction temperature at this

temperature for 2 hours; (2) After completing the reaction of step (I) the amount of

water was added, stirring, standing, falling layer of water, to obtain a crude liquid

sorbitol esters; the crude liquid esters of sorbitol was added anhydrous sodium

carbonate adjusted to PH 7; (3) of the crude liquid sorbitol ester distillation,

collecting 70-80 ° C / 50mmHg fractions, sorbitol esters have finished.

(2) as claimed in claim 1, wherein a sorbitol ester, characterized in that:

acetic anhydride: glutaric enol: mol of sodium acetate and I: 1. 7-1. 9: 0.

05.

3 as claimed in claim 1, wherein a sorbitol ester, characterized in that:

in step (2), wherein the amount of water added, the amount of water in

step (I) 10% of the weight of the material.

Metodo di preparazione di acetato prenilCN 103012132 A

ASTRATTO

L'invenzione descrive un metodo di preparazione di acetato prenil , che

comprende le seguenti fasi: (1) l'aggiunta di anidride acetica e acetato di sodio in

un recipiente di reazione, riscaldamento a 100 gradi C, aggiungendo dropwisely

pentadienol a 100-110 gradi C, quindi eseguire temperatura costante reazione per

2 ore alla temperatura; (2) Dopo la reazione, aggiungendo una quantità adeguata

di acqua nella soluzione della fase (1), mescolando, in piedi, separano per

rimuovere l'acqua al livello inferiore in modo da ottenere grezzo acetato prenil

liquido ; aggiungendo carbonato di sodio anidro in greggio acetato prenil liquido

per regolare il pH a 7; (3) rettificare il greggio acetato prenil liquido, raccogliendo

una frazione del 70-80 DEG C/50 mmHg avere la acetato prenil prodotto finito. L'invenzione è semplice nella preparazione condizioni di reazione, molto elevati in resa

del prodotto, e particolarmente adatto per la produzione industriale; l' acetato prenil resa del prodotto è superiore al 88%, e il contenuto dopo rettifica è fino a più di

97%.

DESCRIZIONE tradotto dal cinese

Sorbitol esters thereof

Technology

[0001] The present invention relates to the field of chemical technology, in

particular to a method for preparing esters of sorbitol.

BACKGROUND

[0002] sorbitol esters (isopentenyl acetate ester China; - prenyl acetate; acid -2 -

isopentenyl esters; 3,3 -

Acetic acid allyl ester; 3_-2 - butenyl acetate; 3,3 - dimethyl allyl acetate;

Titanium -3 - methyl - 2 - butenyl acetate; acid 3 - methyl-2 - butenyl ester; 3 -

methyl - 2 - butene-1 - acetate) was prepared. Sorbitol esters existing system by

a method for producing prenyl chloride and sodium acetate as raw interaction

system. As the solid sodium acetate, the reaction to the introduction of toluene

as a solvent, not only reduces the production capacity, and the subsequent

process will increase the problem of solvent recovery. Meanwhile chlorinated

isoprene there is damage to the environment, the human body after inhalation

obvious damage lung tissue, and the price is higher. The reaction of a large amount of salt water burden on the environment.

SUMMARY OF THE INVENTION

[0003] The object of the present invention is to provide a method for preparing esters of sorbitol, this production method is

simple

Single reaction without solvent, improve equipment utilization, product yield. Raw materials for environmental damage is

small, the reaction does not produce wastewater harm to the environment.

[0004] The present invention through the following technical solution:

One kinds of sorbitol ester, comprising the steps of:

(1) into the reactor in acetic anhydride and sodium acetate, heated to 100 ° C after the dropwise addition, glutaric 100-110 ° c

alcohol was added dropwise at this temperature for 2 hours under constant;

(2) After completing the reaction of step (I) the amount of water was added, stirring, standing, falling layer of water, to obtain a

crude liquid sorbitol esters; sorbitol ester To the crude liquid was added to adjust the PH of anhydrous sodium carbonate to

7;

(3) the crude liquid sorbitol ester distillation, collecting 70-80 ° C / 50mmHg fractions, sorbitol esters have finished.

[0005] The acetic anhydride: glutaric alcohol: 1:1 molar sodium acetate. 7-1 9: 0.05.

[0006] Step (2) The amount of water added, the amount of water in step (I) to 10% by weight of the material.

Trova stato dell'arte Discuti questa applicazione View PDF Scarica il PDF

Numero dipubblicazione

CineseInglese

"1191-16-8" OR "prenyl acetate" OR "3-methyl-2-butenyl acetate" OR "3-methyl-2-buten-1-yl acetate"gian.colla @ aliceposta.it

+ Tu Ricerca Immagini Mappe Ascolta YouTube Notizie Gmail Unità Calendario Di più

Testo originale

Publication number

Contribuisci a una traduzione migliore

13/2/2014 CN103012132A Patent - Preparazione di acetato prenil - Google Patents

https://www.google.com/patents/CN103012132A?cl=en&dq=%221191-16-8%22+OR+%22prenyl+acetate%22+OR+%223-methyl-2-butenyl+acetate%22+… 2/3

[0007] The present invention compared with the prior art has the following advantages:

The preparation is simple reaction conditions, product yield is high, especially for the industrial production of the present

invention can be widely used in daily chemical flavor formulations.

[0008] sorbitol ester product yield of 88% and above, after distillation content of up to 97% and above.

[0009] Description of Embodiments Example 1

The molar ratio of acetic anhydride: glutaric enol: Sodium acetate = 1: 1.8: 0.05.

[0010] I) to ensure that the reactor clean and dry. The 1020 kg of acetic anhydride with a pump into the reactor and adding 41

kg of sodium acetate was heated to 100 ° c after the dropwise addition, glutaric enol 100-110 ° c 1548 kg, about 4 hours After

completion of dropping, in thermostatic temperature for 2 hours; reaction end: Shu dienol feed solution containing less than

O. 5%.

[0011] reaction equation:

2) After the reaction, the crude product was added to 260 kg of water, stirred, allowed to stand. Fall layer of water, to obtain a

crude liquid sorbitol esters of 2420 kg. To the crude liquid sorbitol esters of anhydrous sodium carbonate was added to adjust

the Ph 7.

[0012] 3) the step (2) Ph adjusted to 7 after the crude liquid sorbitol ester distillation, collecting 70-80 ° C / 50mmHg for

distillate product sorbitol esters, sorbitol esters to obtain 2136 kg product, the GC analysis, finished pear ester content of

97.1%, sorbitol ester product yield was 88.3%.

[0013] Example 2

The molar ratio of acetic anhydride: glutaric enol: Sodium acetate = 1: 1.9: 0.05.

[0014] I) to ensure that the reactor clean and dry. The 1020 kg of acetic anhydride with a pump into the reactor and adding 41

kg of sodium acetate was heated to 100 ° c after the dropwise addition, glutaric enol 100-110 ° c 1634 kg, about 4 hours After

completion of dropping, in thermostatic temperature for 2 hours; reaction end: Shu dienol feed solution containing less than

O. 5%.

[0015] reaction equation:

2) After the reaction, the crude product was added to 280 kg of water, stirred, allowed to stand. Fall layer of water, to obtain a

crude liquid sorbitol esters of 2430 kg. To the crude liquid sorbitol esters of anhydrous sodium carbonate was added to adjust

the Ph 7.

[0016] 3) step 2) Ph adjusted to 7 after the crude liquid sorbitol ester distillation, collecting 70-80 ° C / 50mmHg for distillate

product sorbitol esters, sorbitol esters to obtain 2128 kg product by GC analysis, finished pear ester content of 97.2%,

sorbitol ester product yield was 87.6%.

[0017] Example 3

The molar ratio of acetic anhydride: glutaric enol: Sodium acetate = 1: 1.7: 0.05.

[0018] I) to ensure that the reactor clean and dry. The 1020 kg of acetic anhydride with a pump into the reactor and adding 41

kg of sodium acetate was heated to 100 ° c after the dropwise addition, glutaric enol 100-110 ° c 1462 kg, about 4 hours After

completion of dropping, in thermostatic temperature for 2 hours; reaction end: Shu dienol feed solution containing less than

O. 5%.

[0019] reaction equation:

2) After the reaction, the crude product was added to 260 kg of water, stirred, allowed to stand. Fall layer of water, to obtain a

crude liquid sorbitol esters of 2180 kg. To the crude liquid sorbitol esters of anhydrous sodium carbonate was added to adjust

the Ph 7.

[0020] 3) the step (2) Ph adjusted to 7 after the crude liquid sorbitol ester distillation, collecting 70-80 ° C / 50mmHg for

distillate product sorbitol esters, sorbitol esters to obtain 1912 kg product, the GC analysis, finished pear ester content of

97.3%, sorbitol ester product yield was 87.7%.

13/2/2014 CN103012132A Patent - Preparazione di acetato prenil - Google Patents

https://www.google.com/patents/CN103012132A?cl=en&dq=%221191-16-8%22+OR+%22prenyl+acetate%22+OR+%223-methyl-2-butenyl+acetate%22+… 3/3

CLASSIFICAZIONE

Classificazione internazionale C07C67/08 , C07C69/145

EVENTI LEGALI

Data Codice Evento Descrizione

1 Maggio 2013 C10 Richiesta di esame nel merito

Apr 3, 2013 C06 Pubblicazione

Home page di Google - Sitemap - Download collettivi USPTO - Norme sulla privacy - Termini di servizio - Informazioni su Google Brevetti - Invia un commento

© 2012 Google