KR101762248B1 - Manufacturing method of Butyldiglycol Adipate and Butyldiglycol Adipate manufactured by the same - Google Patents
Manufacturing method of Butyldiglycol Adipate and Butyldiglycol Adipate manufactured by the same Download PDFInfo
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- KR101762248B1 KR101762248B1 KR1020150113592A KR20150113592A KR101762248B1 KR 101762248 B1 KR101762248 B1 KR 101762248B1 KR 1020150113592 A KR1020150113592 A KR 1020150113592A KR 20150113592 A KR20150113592 A KR 20150113592A KR 101762248 B1 KR101762248 B1 KR 101762248B1
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- South Korea
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- butyldiglycol
- reaction product
- adipate
- acid value
- product
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/41—Preparation of salts of carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/54—Preparation of carboxylic acid anhydrides
- C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C55/00—Saturated compounds having more than one carboxyl group bound to acyclic carbon atoms
- C07C55/02—Dicarboxylic acids
- C07C55/14—Adipic acid
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a process for producing butyldiglycol adipate and a butyldiglycol adipate produced thereby, which comprises the steps of adding adipic acid and butyldiglycol to prepare a reaction mixture One); Reacting the reaction mixture at a normal pressure (step 2); A second step of reacting the first reaction product with a vacuum pressure (step 3); Cooling the secondary reaction product (step 4); And neutralizing the cooled reaction product (step 5); It is a technical feature that it is manufactured with the technical feature that the acid value of the final product is prevented from rising, and the amount of wastewater is reduced by a small amount of deoxidation, and product yield is increased.
Description
The present invention relates to a process for producing butyldiglycol adipate and a butyldiglycol adipate produced thereby, and more particularly to a process for producing butyldiglycol adipate which can prevent an increase in the acid value of a final product of a plasticizer And a butyl diglycol adipate produced thereby.
Plasticizers are additives that improve the processability by reducing the coefficient of friction between polymer resins, and their types and applications are very diverse. Typical examples include phthalate-based, adipate-based, phosphate-based, and trimellitate-based plasticizers, and these are mostly used as general-purpose plasticizers.
Recently, many studies have been conducted to overcome the problems of plasticizers.
Korean Patent Laid-Open Publication No. 10-2007-0092490 (Sep. 13, 2007) discloses a polymeric plasticizer which is excellent in heat loss and durability when used in a polymer resin, does not deteriorate mechanical properties, Compositions are disclosed.
Korean Patent Laid-Open Publication No. 10-2009-0057299 (Jun. 4, 2009) discloses a polymer plasticizer for a polymer composition exhibiting a large surface energy.
Korean Patent Publication No. 10-0919930 (Oct. 10, 2009) discloses a resin composition which is low in weight loss when heated as an additive to various polymer resins, excellent in viscosity and extractability, and has excellent properties such as hardness, elongation, There is disclosed a polymeric plasticizer which does not deteriorate mechanical properties, and particularly provides a polymer resin excellent in heat resistance and chemical resistance due to its excellent anti-icing property.
Although a patent has been filed for improving the physical properties of the plasticizer as described above, there has been no research on a manufacturing method that can prevent an increase in the acid value of the final product of the plasticizer.
It is an object of the present invention to provide a process for producing butyl diglycol adipate capable of preventing an increase in the acid value of a final product of a plasticizer and a butyl diglycol adipate produced thereby.
In order to achieve the above object, the present invention provides the following means.
The present invention relates to a process for preparing a reaction mixture by adding adipic acid and butyldiglycol (step 1); Reacting the reaction mixture at a normal pressure (step 2); A second step of reacting the first reaction product with a vacuum pressure (step 3); Cooling the secondary reaction product (step 4); And neutralizing the cooled reaction product (step 5); (Butyldiglycol Adipate), which comprises the steps of:
In Step 1, 2.2 to 2.5 mol of butyldiglycol is added to 1 mol of adipic acid.
In the step 3, the primary reaction product is reacted at a temperature of 120 to 150 ° C. under a vacuum pressure of 400 to 600 mmHg for 3 to 5 hours, and a pressure of 400 to 600 mmHg at a temperature of 190 to 210 ° C. For 5 hours.
And washing the neutralized reaction product after the step 5, further comprising washing, dehydrating and filtering the neutralized reaction product, wherein the water washing is performed by adding 5 parts by weight of wash water and 0.2 parts by weight of Na 2 SO 4 to 100 parts by weight of the neutralized reaction product The mixture is stirred for 30 minutes to 1 hour and then allowed to stand.
The present invention also provides a butylated glycol adipate produced by the above process.
Butyldiglycol adipate according to the present invention prevents an increase in the acid value of the final product, thereby reducing the amount of wastewater to be produced with a small amount of deoxidation and increasing product yield.
Hereinafter, the present invention will be described in detail.
The acid value of the plasticizer is preferably 5 or less. The lower the acid number is, the better the value is at least 5 or less. The high acid value means that the unreacted acid remains in the plasticizer, which has a bad influence on the purity of the product itself.
The acid value can be calculated by the following equation (1).
[Equation 1]
Acid Value = (titration amount x 5.6 x factor) / sample amount
In Equation (1), the appropriate amount is the consumption (ml) of the 0.1 N KOH aqueous solution used for titrating the plasticizer, and the factor is the correction coefficient of the KOH aqueous solution (the factor is 1 for 0.1 N KOH aqueous solution) Represents the weight of the sample.
Butyldiglycol adipate is a plasticizer for rubber, conventionally mixing adipic acid and butyl diglycol; Reacting the mixture at a constant temperature; Cooling the solution at an acid value of 5 or less, filtering and packaging; .
In the case of producing butyl diglycol adipate by the above-described conventional production method, there is a problem that the amount of deoxidized water increases and the amount of wastewater increases due to an increase in acid value as time elapses after product packaging.
A feature of the present invention is to provide a method for producing butyl diglycol adipate which can prevent an increase in the acid value of the final product, thereby reducing the amount of waste water with a small amount of deoxidation and raising product yield.
First, a method for producing butyldiglycol adipate according to the present invention will be described.
The method for producing butyldiglycol adipate of the present invention is a method for producing butyldiglycol adipate,
Adding adipic acid and butyldiglycol to prepare a reaction mixture (step 1);
Reacting the reaction mixture at a normal pressure (step 2);
A second step of reacting the first reaction product with a vacuum pressure (step 3);
Cooling the secondary reaction product (step 4); And
Neutralizing the cooled reaction product (step 5);
.
In the step 1, it is preferable to add 2.2 to 2.5 mol of butyldiglycol to 1 mol of adipic acid to prepare a reaction mixture. If less than 2.2 moles of butyl diglycol is added to 1 mole of adipic acid, there is a problem that it is difficult to maintain the acid value of the final product at 1 or less. When 2.5 mole of butyl diglycol is added, the recovery amount is increased, There is a problem that can be reduced.
In the step 2, the reaction mixture is preferably subjected to a primary reaction at 120 to 150 ° C. for 12 to 15 hours under nitrogen at normal pressure. In the reaction in the above range, the acid value of the first reaction product becomes 30 or less.
In the step 3, the primary reaction product is reacted at a vacuum pressure of 400 to 600 mmHg at a temperature of 120 to 150 ° C for 3 to 5 hours, a vacuum pressure of 400 to 600 mmHg, The reaction is preferably carried out for 5 hours.
When the primary reaction product is reacted at a temperature of 120 to 150 ° C. under a vacuum pressure of 400 to 600 mmHg for 3 to 5 hours, the acid value of the reaction product becomes 3 or less, and the reaction is carried out at a temperature of 190 to 210 ° C. for 4 to 5 hours Upon reaction, the acid value of the reaction product becomes 1 or less.
Conventionally, there is a problem that the acid value of the final product increases with time after proceeding without a vacuum reaction. However, the present invention is characterized in that the acid value is reduced by adding a vacuum reaction.
Step 4 is a step of cooling the secondary reaction product to 80 占 폚.
Step 5 is a step of neutralizing the cooled reaction product by adding 10% aqueous solution of sodium hydroxide thereto. When the reaction product is neutralized, the acid value becomes 0.5 or less. In the present invention, there is an advantage that the acid value is low and the amount of deoxidation is small.
After the step 5, the neutralized reaction product may be further washed, dehydrated and filtered.
5 parts by weight of water washing water and 0.2 parts by weight of Na 2 SO 4 are added to 100 parts by weight of the neutralized reaction product, and the mixture is stirred for 30 minutes to 1 hour and then allowed to stand. If the Na 2 SO 4 is not included, the specific gravity of the reaction product is high, so that it is difficult to remove the impurities by sinking downward.
The washing operation is preferably repeated twice.
After the washing with water, the mixture is decompressed by a vacuum pump to dehydrate, and the adsorbent is added and filtered to finally obtain a plasticizer.
The present invention also provides butyldiglycol adipate, which is a plasticizer for rubber, having excellent cold resistance, produced by the above production method.
Butyldiglycol adipate according to the present invention prevents an increase in the acid value of the final product, thereby reducing the amount of wastewater to be produced with a small amount of deoxidation and increasing product yield.
Hereinafter, the constitution and effects of the present invention will be described in more detail through examples. These embodiments are only for illustrating the present invention, and the scope of the present invention is not limited by these embodiments.
The reaction mixture was prepared by adding 1 mol of adipic acid and 2.4 mol of butyldiglycol to a four-liter 2-liter round flask equipped with a stirrer and a condenser, The reaction was carried out at a temperature of 140 to 600 mmHg for 4 hours, followed by a reaction at a temperature of 200 DEG C under a vacuum pressure of 400 to 600 mmHg for 4 hours. After the reaction, the reaction product was cooled to 80 DEG C and neutralized by the addition of a 10% aqueous solution of sodium hydroxide. 5 parts by weight of wash water and 0.2 part by weight of Na 2 SO 4 were added to 100 parts by weight of the neutralized reaction product, stirred for 30 minutes and then allowed to stand. The washing operation was repeated twice. After the washing with water, the mixture was decompressed with a vacuum pump to dehydrate, and an adsorbent was added thereto and filtered to prepare butyldiglycol adipate.
[Comparative Example 1]
Butyldiglycol adipate was prepared in the same manner as in Example 1 except that 2.1 mol of butyldiglycol was added.
[Comparative Example 2]
Except that the step of reacting at 400 ° C. to 600 mmHg vacuum pressure for 4 hours at a temperature of 140 ° C. and for 4 hours at a temperature of 200 ° C. under a vacuum pressure of 400 to 600 mmHg Butyldiglycol adipate was prepared in the same manner as the above.
[Experimental Example 1]
Acid Value in the production of butyldiglycol adipate of Example 1, Comparative Example 1 and Comparative Example 2, acid value after one week and yield were measured and are shown in Table 1.
(At the time of manufacture)
As shown in Table 1, the acid value of butyldiglycol adipate of Example 1 did not rise after one week, whereas the acid value of butyldiglycol adipate of Comparative Example 2 increased after one week And it is confirmed that the amount of deoxidation is increased and the yield is decreased.
Claims (5)
Reacting the reaction mixture at a normal pressure (step 2);
A second step of reacting the first reaction product with a vacuum pressure (step 3);
Cooling the secondary reaction product (step 4); And
Neutralizing the cooled reaction product (step 5);
, ≪ / RTI &
In Step 1, 2.2 to 2.5 mol of butyldiglycol is added to 1 mol of adipic acid,
In the step 3, the primary reaction product is reacted at a temperature of 120 to 150 ° C. under a vacuum pressure of 400 to 600 mmHg for 3 to 5 hours, and a pressure of 400 to 600 mmHg at a temperature of 190 to 210 ° C. To < / RTI > 5 hours,
A process for the preparation of butyldiglycol adipate.
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| KR1020150113592A KR101762248B1 (en) | 2015-08-12 | 2015-08-12 | Manufacturing method of Butyldiglycol Adipate and Butyldiglycol Adipate manufactured by the same |
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| KR101762248B1 true KR101762248B1 (en) | 2017-07-28 |
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| KR102076134B1 (en) * | 2017-11-20 | 2020-02-11 | 주식회사 거영 | Method for preparing butyl carbitol formal and butyl carbitol formal prepared by the same |
| CN111499507A (en) * | 2020-05-25 | 2020-08-07 | 东营市金凤凰化工股份有限公司 | Production process of diethylene glycol monobutyl ether adipate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120258249A1 (en) * | 2011-04-08 | 2012-10-11 | Adamson Linda A | Low/zero voc glycol ether-esters as coalescents for aqueous polymeric dispersions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20070092490A (en) | 2006-03-10 | 2007-09-13 | 주식회사 엘지화학 | Polymer plasticizer composition having good viscosity property, preparation method of the same and polymer resin containing the same |
| US20080058466A1 (en) | 2006-09-05 | 2008-03-06 | Joshi Makarand V | Polymeric Plasticizers for Polymer Compositions Exhibiting High Surface Energy |
| KR100919930B1 (en) | 2007-01-10 | 2009-10-07 | 주식회사 엘지화학 | Polymer plasticizer having migration-resistant property, preparation method thereof and polymer resin composition containing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120258249A1 (en) * | 2011-04-08 | 2012-10-11 | Adamson Linda A | Low/zero voc glycol ether-esters as coalescents for aqueous polymeric dispersions |
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