CN104402719A - Preparation method of benzyl acetate - Google Patents
Preparation method of benzyl acetate Download PDFInfo
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- CN104402719A CN104402719A CN201410717092.5A CN201410717092A CN104402719A CN 104402719 A CN104402719 A CN 104402719A CN 201410717092 A CN201410717092 A CN 201410717092A CN 104402719 A CN104402719 A CN 104402719A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/10—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond
- C07C67/11—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond being mineral ester groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/58—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
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Abstract
The invention discloses a preparation method of benzyl acetate. The method comprises the following steps: enabling organic amine to react with excessive benzyl chloride at the temperature of 60-90 DEG C for 15-60 min so as to obtain a phase transfer catalyst feed solution; adding sodium acetate, water and sodium carbonate into the phase transfer catalyst feed solution for performing esterification reaction so as to obtain a first crude product of the benzyl acetate; washing the first crude product of the benzyl acetate with water so as to obtain a second crude product of the benzyl acetate; performing impurity removal treatment on the second crude product of the benzyl acetate so as to obtain a third crude product of the benzyl acetate; performing secondary rectification and refining operation on the third crude product of the benzyl acetate so as to obtain the pure product of the benzyl acetate. According to the invention, a homemade phase transfer catalyst is used for reaction, so that the cost is reduced, the complexity of a process route is greatly reduced, the by-product, that is benzyl alcohol, is translated into the benzyl acetate product, and the reaction yield and the conversion rate are effectively increased. The characteristics of high yield, good purity, and pure fragrance of the product are achieved.
Description
Technical field
The present invention relates to chemical field, particularly a kind of jasmal preparation method.
Background technology
Jasmal has another name called phenylmethyl acetate, is a kind of colourless oil liquid, has volatility.Jasmal is a kind of ester perfume, and have strong Flower of Arabian Jasmine and fruit aroma, smell is fresh and sweet.In fragrance industry, be usually used in the food flavour preparing apple, raw pears, banana, jasmine, cherry, pineapple, pawpaw, milk wet goods odor type, may be used for medicine, food and makeup, as fragrant correctives or perfume compound.
Being prepared in of jasmal industrially generally has three kinds of approach: the first under catalyst, heats esterification by Benzyl Chloride and sodium acetate to form, and then purifies by distillation method and obtains; The second is formed by benzylalcohol and acetic acid esterified, purifies and obtain by distillation method; The third is obtained by phenyl aldehyde and acetic acid and zinc powder effect.In the process of benzyl chlorine synthetic benzyl acetate, Benzyl Chloride hydrolysis often occurs with side reaction, and its by product, as phenyl aldehyde, benzylalcohol etc., can affect the fragrance of jasmal.
Summary of the invention
Based on this, be necessary to propose that a kind of reaction yield is high, raw materials cost is low, product purity is high and the jasmal preparation method that fragrance is pure.
To achieve the above object of the invention, inventors herein propose a kind of jasmal preparation method, comprise step:
Organic amine and excess chlorination benzyl react 15-60 minute at 60-90 DEG C, obtain phase-transfer catalyst stock liquid;
In described phase-transfer catalyst stock liquid, add sodium acetate, water, sodium carbonate carries out esterification, obtain jasmal first crude product;
Wash described jasmal first crude product, obtain jasmal second crude product;
Removal of impurities process is done to described jasmal second crude product, obtains jasmal the 3rd crude product;
Secondary rectifying purification operations is done to described jasmal the 3rd crude product, obtains jasmal sterling.
Further, in described jasmal preparation method, described removal of impurities process specifically comprises step:
In described jasmal second crude product, add aqueous sodium carbonate, at 105-130 DEG C, react 0.5-2 hour, layering obtains organic phase;
In the organic phase that upper step obtains, add saturated aqueous solution of sodium bisulfite or saturated metabisulfite solution, at 20-40 DEG C, react 0.5-2 hour, layering obtains organic phase;
In the organic phase that upper step obtains, add acetic acid and catalyzer, at 70-100 DEG C, react 0.5-2 hour, cross and filter decorating film, gained filtrate is jasmal the 3rd crude product; Described catalyzer comprises resin cation (R.C.) or zeolite molecular sieve.
Further, in described jasmal preparation method, in described aqueous sodium carbonate, the massfraction of sodium carbonate is 3-10%; The mass ratio of jasmal second crude product and sodium carbonate solution is 1:0.3-0.4;
The mass ratio of jasmal second crude product and saturated aqueous solution of sodium bisulfite or saturated metabisulfite solution is 1:0.5-1.5;
The mass ratio of described organic phase, acetic acid and catalyzer is 1:0.03-0.08:0.005-0.05.
Further, in described jasmal preparation method, described secondary rectifying purification operations specifically comprises:
Jasmal the 3rd crude product is inputted the first rectifying tower and carries out rectification under vacuum, the light constituent in overhead extraction is back in tower through condensation rear section, and part extraction is to light constituent storage tank; Tower reactor Produced Liquid input Second distillation column carries out rectification under vacuum operation, and overhead extraction liquid is back in tower through condensation rear section, and part enters jasmal sterling storage tank.
Further, in described jasmal preparation method, the operational condition of the first rectifying tower and Second distillation column comprises:
First rectifying tower pressure on top surface is 5-6kPa, and tower top temperature is 80-100 DEG C, and bottom temperature is 125-130 DEG C;
Second distillation column tower top pressure is 3-5kPa, and tower top temperature is 110-116 DEG C, and bottom temperature is 145-150 DEG C.
Further, in described jasmal preparation method, the mol ratio of Benzyl Chloride and organic amine is 1:0.01-0.04.
Further, in described jasmal preparation method, in described esterification, the mol ratio of sodium acetate, water, sodium carbonate is 1.05-1.25:0.4-0.5:0.01-0.03;
Further, in described jasmal preparation method, described esterification reaction temperature is 105-130 DEG C, and the reaction times is 1-3 hour.
Further, in described jasmal preparation method, described organic amine is dimethylamine, Trimethylamine 99, ethamine.
Compared to prior art, the advantage of technical solution of the present invention is: participate in reaction with homemade phase-transfer catalyst, cost-saving, greatly reduce operational path complexity, and change byproduct phenylcarbinol into product jasmal, effectively improve reaction yield and transformation efficiency, have the advantages that product yield is high, purity good, fragrance is pure, product jasmal content is not less than 99.8%.
Accompanying drawing explanation
Fig. 1 is the schema of jasmal preparation method described in an embodiment of the present invention.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with embodiment.
Referring to Fig. 1, is the schema of jasmal preparation method described in an embodiment of the present invention.Described method comprises step:
S1, organic amine and excess chlorination benzyl are obtained by reacting phase-transfer catalyst stock liquid;
Reaction conditions is: react 15-60 minute at 60-90 DEG C, and the mol ratio of Benzyl Chloride and organic amine is 1:0.01-0.04.Further, described organic amine is dimethylamine, Trimethylamine 99, ethamine.
S2, in described phase-transfer catalyst stock liquid, add sodium acetate, water, sodium carbonate carries out esterification, obtains jasmal first crude product;
In described esterification, the mol ratio of sodium acetate, water, sodium carbonate is 1.05-1.25:0.4-0.5:0.01-0.03; The mass ratio of each reactant added in described Benzyl Chloride and esterification is 1:1.05-1.25:0.4-0.5:0.01-0.03.Described esterification reaction temperature is 105-130 DEG C, and the reaction times is 1-3 hour.
S3, wash described jasmal first crude product, obtain jasmal second crude product.
S4, removal of impurities process is done to described jasmal second crude product, obtain jasmal the 3rd crude product;
Described removal of impurities process specifically comprises step:
In described jasmal second crude product, add aqueous sodium carbonate, at 105-130 DEG C, react 0.5-2 hour, layering obtains organic phase; In described aqueous sodium carbonate, the massfraction of sodium carbonate is 3-10%; The mass ratio of jasmal second crude product and sodium carbonate solution is 1:0.3-0.4; The effect of sodium carbonate is regulation system pH value, and the benzylidene chloride in Promotion system is hydrolyzed to the process of phenyl aldehyde.
In the organic phase that upper step layering obtains, add saturated aqueous solution of sodium bisulfite or saturated metabisulfite solution, at 20-40 DEG C, react 0.5-2 hour, layering obtains organic phase; The mass ratio of jasmal second crude product and saturated aqueous solution of sodium bisulfite or saturated metabisulfite solution is 1:0.5-1.5; The method of water phase separated and organic phase is for stirring rear stratification.
In the organic phase that upper step layering obtains, add acetic acid and catalyzer, at 70-100 DEG C, react 0.5-2 hour, cross and filter decorating film, gained filtrate is jasmal the 3rd crude product; Described catalyzer comprises resin cation (R.C.) or zeolite molecular sieve; The mass ratio of described organic phase, acetic acid and catalyzer is 1:0.03-0.08:0.005-0.05.
S5, secondary rectifying purification operations is done to described jasmal the 3rd crude product, obtain jasmal sterling.
Described secondary rectifying purification operations specifically comprises:
Jasmal the 3rd crude product is inputted the first rectifying tower and carries out rectification under vacuum, the light constituent in overhead extraction is back in tower through condensation rear section, and part extraction is to light constituent storage tank; Tower reactor Produced Liquid input Second distillation column carries out rectification under vacuum operation, and overhead extraction liquid is back in tower through condensation rear section, and part enters jasmal sterling storage tank.
The operational condition of the first rectifying tower and Second distillation column comprises:
First rectifying tower pressure on top surface is 5-6kPa, and tower top temperature is 80-100 DEG C, and bottom temperature is 125-130 DEG C;
Second distillation column tower top pressure is 3-5kPa, and tower top temperature is 110-116 DEG C, and bottom temperature is 145-150 DEG C.
Adopt the mode of continuous rectification, obtained the jasmal sterling that purity is higher like this in the first rectifying tower first by the light constituent magazins' layout of product out, in Second distillation column by the rectifying of jasmal sterling out.
Jasmal preparation technology in technical solution of the present invention can obtain highly purified jasmal product, and in product, jasmal content is not less than 99.8%.By participating in jasmal building-up reactions directly from controlling catalyst, can effectively save production cost; And in the esterification obtaining jasmal, add the hydrolysis of sodium carbonate suppression Benzyl Chloride, the generation of by product can be reduced; In impurity removal process, remove phenyl aldehyde by aqueous solution of sodium bisulfite or metabisulfite solution further, then add acid esterification, byproduct benzyl alcohol ester is turned to product jasmal, further increases the yield of jasmal.Highly purified jasmal is obtained finally by rectification under vacuum.
First embodiment
Take 300g Benzyl Chloride, 6g ethamine drops into reactor, keep temperature 85 DEG C, stirring reaction 20 minutes, drops into 235g anhydrous sodium acetate, 17g water, 4g sodium carbonate, is warming up to 120 DEG C in reactor, stirring reaction 2.5 hours.Reaction end obtains jasmal first crude product, and washing obtains jasmal second crude product.
In jasmal second crude product of 346g, add the aqueous sodium carbonate that 103.8g massfraction is 5%, react 1 hour at 120 DEG C, layering obtains organic phase; In organic phase, add the saturated aqueous solution of sodium bisulfite of 173g stirring reaction 1 hour at normal temperatures again, stratification, obtains upper organic layer.By organic layer and 14g acetic acid, 4g resin cation (R.C.) stirring reaction 1.5 hours at 80 DEG C, filter, gained filtered liquid is jasmal the 3rd crude product; Jasmal the 3rd crude product is inputted the first rectifying tower and carries out rectification under vacuum, tower top pressure is 5.5kPa, and tower top temperature is 90 DEG C, and bottom temperature is 128 DEG C; Light constituent in overhead extraction is back in tower through condensation rear section, and part extraction is to light constituent storage tank; Tower reactor Produced Liquid input Second distillation column carries out rectification under vacuum operation, and tower top pressure is 4kPa, and tower top temperature is 113 DEG C, and bottom temperature is 148 DEG C.Overhead extraction liquid is back in tower through condensation rear section, and part enters jasmal sterling storage tank.
Jasmal purity 99.93% in product, yield 95.7%.
Second embodiment
Take 400g Benzyl Chloride, 8g dimethylamine drops into reactor, keep temperature 75 DEG C, stirring reaction 30 minutes, drops into 300g anhydrous sodium acetate, 20g water, 4g sodium carbonate, is warming up to 110 DEG C in reactor, stirring reaction 3 hours.Reaction end obtains jasmal first crude product, and washing obtains jasmal second crude product.
Add the aqueous sodium carbonate that 182.8g massfraction is 5% in jasmal second crude product 453, react 1 hour at 120 DEG C, layering obtains upper organic phase; In organic phase, add the saturated metabisulfite solution of 453g stirring reaction 1 hour at normal temperatures again, stratification, obtains upper organic layer.By organic layer and 28g acetic acid, 10g Zeo-karb stirring reaction 2 hours at 80 DEG C, filter, gained filtered liquid is jasmal the 3rd crude product; Jasmal the 3rd crude product is inputted the first rectifying tower and carries out rectification under vacuum, tower top pressure is 5.5kPa, and tower top temperature is 90 DEG C, and bottom temperature is 128 DEG C; Light constituent in overhead extraction is back in tower through condensation rear section, and part extraction is to light constituent storage tank; Tower reactor Produced Liquid input Second distillation column carries out rectification under vacuum operation, and tower top pressure is 4kPa, and tower top temperature is 113 DEG C, and bottom temperature is 148 DEG C.Overhead extraction liquid is back in tower through condensation rear section, and part enters jasmal sterling storage tank.
Jasmal purity 99.82% in product, yield 95.7%.
3rd embodiment
Be that condition that Benzyl Chloride and ethamine react reacts 15 minutes at being 60 DEG C with the difference of the first embodiment.
Jasmal purity 99.88% in product, yield 95.6%.
4th embodiment
Be that condition that Benzyl Chloride and ethamine react reacts 60 minutes at being 90 DEG C with the difference of the first embodiment.
Jasmal purity 99.92% in product, yield 95.7%.
5th embodiment
Be that the condition of esterification reacts 60 minutes at being 105 DEG C with the difference of the first embodiment.
Jasmal purity 99.85% in product, yield 95.8%.
6th embodiment
Be that the condition of esterification reacts 180 minutes at being 130 DEG C with the difference of the first embodiment.
Jasmal purity 99.90% in product, yield 96.0%.
7th embodiment
Be that condition that jasmal second crude product and aqueous sodium carbonate react reacts 30 minutes at being 105 DEG C with the difference of the first embodiment.
Jasmal purity 99.87% in product, yield 95.9%.
8th embodiment
Be that condition that jasmal second crude product and aqueous sodium carbonate react reacts 120 minutes at being 130 DEG C with the difference of the first embodiment.
Jasmal purity 99.82% in product, yield 95.4%.
9th embodiment
Be that the reaction conditions of jasmal second crude product and saturated aqueous solution of sodium bisulfite reacts 30 minutes at being 20 DEG C with the difference of the first embodiment.
Jasmal purity 99.93% in product, yield 95.6%.
Tenth embodiment
Be that the reaction conditions of jasmal second crude product and saturated aqueous solution of sodium bisulfite reacts 120 minutes at being 40 DEG C with the difference of the first embodiment.
Jasmal purity 99.91% in product, yield 95.8%.
11 embodiment
Be that organic phase and acetic acid, catalyst reaction condition react 30 minutes at being 70 DEG C with the difference of the first embodiment.
Jasmal purity 99.89% in product, yield 95.9%.
12 embodiment
Be that organic phase and acetic acid, catalyst reaction condition react 120 minutes at being 100 DEG C with the difference of the first embodiment.
Jasmal purity 99.83% in product, yield 96.0%.
13 embodiment
Be in rectifying with the difference of the first embodiment, the first rectifying tower pressure on top surface is 5kPa, and tower top temperature is 80 DEG C, and bottom temperature is 125 DEG C;
Second distillation column tower top pressure is 3kPa, and tower top temperature is 110 DEG C, and bottom temperature is 145 DEG C.
Jasmal purity 99.89% in product, yield 95.7%.
14 embodiment
Be in rectifying with the difference of the first embodiment, the first rectifying tower pressure on top surface is 6kPa, and tower top temperature is 100 DEG C, and bottom temperature is 130 DEG C;
Second distillation column tower top pressure is 5kPa, and tower top temperature is 116 DEG C, and bottom temperature is 150 DEG C.
Jasmal purity 99.93% in product, yield 95.8%.
Following table is the product index of the present invention first to the 14 embodiment:
| Purity/% | Yield/% | |
| First embodiment | 99.93 | 95.7 |
| Second embodiment | 99.82 | 95.7 |
| 3rd embodiment | 99.88 | 95.6 |
| 4th embodiment | 99.92 | 95.7 |
| 5th embodiment | 99.85 | 95.8 |
| 6th embodiment | 99.9 | 96.0 |
| 7th embodiment | 99.87 | 95.9 |
| 8th embodiment | 99.82 | 95.4 |
| 9th embodiment | 99.93 | 95.6 |
| Tenth embodiment | 99.91 | 95.8 |
| 11 embodiment | 99.89 | 95.9 |
| 12 embodiment | 99.83 | 96.0 |
| 13 embodiment | 99.89 | 95.7 |
| 14 embodiment | 99.93 | 95.8 |
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or terminating unit and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or terminating unit.When not more restrictions, the key element limited by statement " comprising ... " or " comprising ... ", and be not precluded within process, method, article or the terminating unit comprising described key element and also there is other key element.In addition, in this article, " be greater than ", " being less than ", " exceeding " etc. be interpreted as and do not comprise this number; " more than ", " below ", " within " etc. be interpreted as and comprise this number.
Although be described the various embodiments described above; but those skilled in the art are once obtain the basic creative concept of cicada; then can make other change and amendment to these embodiments; so the foregoing is only embodiments of the invention; not thereby scope of patent protection of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included within scope of patent protection of the present invention.
Claims (10)
1. a jasmal preparation method, comprises step:
Organic amine and excess chlorination benzyl react 15-60 minute at 60-90 DEG C, obtain phase-transfer catalyst stock liquid;
In described phase-transfer catalyst stock liquid, add sodium acetate, water, sodium carbonate carries out esterification, obtain jasmal first crude product;
Wash described jasmal first crude product, obtain jasmal second crude product;
Removal of impurities process is done to described jasmal second crude product, obtains jasmal the 3rd crude product;
Secondary rectifying purification operations is done to described jasmal the 3rd crude product, obtains jasmal sterling.
2., in jasmal preparation method as claimed in claim 1, described removal of impurities process specifically comprises step:
In described jasmal second crude product, add aqueous sodium carbonate, at 105-130 DEG C, react 0.5-2 hour, layering obtains organic phase;
In the organic phase that upper step obtains, add saturated aqueous solution of sodium bisulfite or saturated metabisulfite solution, at 20-40 DEG C, react 0.5-2 hour, layering obtains organic phase;
In the organic phase that upper step obtains, add acetic acid and catalyzer, at 70-100 DEG C, react 0.5-2 hour, cross and filter decorating film, gained filtrate is jasmal the 3rd crude product; Described catalyzer comprises resin cation (R.C.) or zeolite molecular sieve.
3., in jasmal preparation method as claimed in claim 2, in described aqueous sodium carbonate, the massfraction of sodium carbonate is 3-10%; The mass ratio of jasmal second crude product and sodium carbonate solution is 1:0.3-0.4.
4., in jasmal preparation method as claimed in claim 2 or claim 3, the mass ratio of jasmal second crude product and saturated aqueous solution of sodium bisulfite or saturated metabisulfite solution is 1:0.5-1.5;
The mass ratio of described organic phase, acetic acid and catalyzer is 1:0.03-0.08:0.005-0.05.
5., in jasmal preparation method as claimed in claim 1 or 2, described secondary rectifying purification operations specifically comprises:
Jasmal the 3rd crude product is inputted the first rectifying tower and carries out rectification under vacuum, the light constituent in overhead extraction is back in tower through condensation rear section, and part extraction is to light constituent storage tank; Tower reactor Produced Liquid input Second distillation column carries out rectification under vacuum operation, and overhead extraction liquid is back in tower through condensation rear section, and part enters jasmal sterling storage tank.
6., in jasmal preparation method as claimed in claim 5, the operational condition of the first rectifying tower and Second distillation column comprises:
First rectifying tower pressure on top surface is 5-6kPa, and tower top temperature is 80-100 DEG C, and bottom temperature is 125-130 DEG C;
Second distillation column tower top pressure is 3-5kPa, and tower top temperature is 110-116 DEG C, and bottom temperature is 145-150 DEG C.
7., in jasmal preparation method as claimed in claim 1 or 2, the mol ratio of Benzyl Chloride and organic amine is 1:0.01-0.04.
8., in jasmal preparation method as claimed in claim 1 or 2, in described esterification, the mol ratio of sodium acetate, water, sodium carbonate is 1.05-1.25:0.4-0.5:0.01-0.03;
9., in jasmal preparation method as claimed in claim 1 or 2, described esterification reaction temperature is 105-130 DEG C, and the reaction times is 1-3 hour.
10., in jasmal preparation method as claimed in claim 1 or 2, described organic amine is dimethylamine, Trimethylamine 99, ethamine.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108130188A (en) * | 2018-01-12 | 2018-06-08 | 潜江新亿宏有机化工有限公司 | A kind of process for purification of fragrance benzyl acetate |
| CN108558660A (en) * | 2018-04-13 | 2018-09-21 | 怀化学院 | A kind of method of rare earth modified catalyzing cation exchange resin synthetic benzyl acetate |
| CN110003000A (en) * | 2019-04-13 | 2019-07-12 | 天津大加化工有限公司 | A kind of production technology of benzyl propionate |
| CN110903196A (en) * | 2018-09-15 | 2020-03-24 | 天津大加化工有限公司 | Production process of benzyl acetate |
| CN110903162A (en) * | 2018-09-15 | 2020-03-24 | 天津大加化工有限公司 | Production process of benzyl alcohol |
| CN114656361A (en) * | 2022-03-30 | 2022-06-24 | 潜江新亿宏有机化工有限公司 | Continuous purification system and method for perfume-grade benzyl acetate |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130188A (en) * | 2018-01-12 | 2018-06-08 | 潜江新亿宏有机化工有限公司 | A kind of process for purification of fragrance benzyl acetate |
| CN108558660A (en) * | 2018-04-13 | 2018-09-21 | 怀化学院 | A kind of method of rare earth modified catalyzing cation exchange resin synthetic benzyl acetate |
| CN110903196A (en) * | 2018-09-15 | 2020-03-24 | 天津大加化工有限公司 | Production process of benzyl acetate |
| CN110903162A (en) * | 2018-09-15 | 2020-03-24 | 天津大加化工有限公司 | Production process of benzyl alcohol |
| CN110903196B (en) * | 2018-09-15 | 2022-05-10 | 天津大加化工有限公司 | Production process of benzyl acetate |
| CN110903162B (en) * | 2018-09-15 | 2022-09-02 | 天津大加化工有限公司 | Production process of benzyl alcohol |
| CN110003000A (en) * | 2019-04-13 | 2019-07-12 | 天津大加化工有限公司 | A kind of production technology of benzyl propionate |
| CN114656361A (en) * | 2022-03-30 | 2022-06-24 | 潜江新亿宏有机化工有限公司 | Continuous purification system and method for perfume-grade benzyl acetate |
| CN114656361B (en) * | 2022-03-30 | 2024-03-29 | 潜江新亿宏有机化工有限公司 | Continuous purification system and method for spice grade benzyl acetate |
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Application publication date: 20150311 |