CN103664619A - Novel synthesis process of dicapryl phthalate - Google Patents
Novel synthesis process of dicapryl phthalate Download PDFInfo
- Publication number
- CN103664619A CN103664619A CN201310612432.3A CN201310612432A CN103664619A CN 103664619 A CN103664619 A CN 103664619A CN 201310612432 A CN201310612432 A CN 201310612432A CN 103664619 A CN103664619 A CN 103664619A
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- CN
- China
- Prior art keywords
- phthalic anhydride
- octanol
- synthesis process
- reaction
- novel synthesis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
Abstract
The invention discloses a novel synthesis process of dicapryl phthalate. The process comprises steps as follows: raw materials are taken in a molar ratio of phthalic anhydride to 2-octanol of 1: (2.7-2.8) and put into a reaction kettle; an isopropyl titanate catalyst accounting for 1%-1.1% of the total amount of phthalic anhydride and 2-octanol is put into the reaction kettle, and the reaction kettle is heated for reaction; and a crude product obtained after the reaction is washed with water, dealcoholized, decolorized and filtered, and a finished product of the dicapryl phthalate is obtained. According to the novel synthesis process, the molar ratio of phthalic anhydride to 2-octanol is improved, the grade of the finished product obtained with the process is high, the catalyst used in the process cannot produce a large amount of wastewater with high COD (chemical oxygen demand), and the environmental protection requirements are met.
Description
Technical field
The present invention relates to organic chemical synthesis field, more specifically relate to a kind of synthesis technique of softening agent.
Background technology:
The softening agent of a kind of excellent property of the secondary monooctyl ester (DCP) of phthalic acid, it has good thermotolerance, photostabilization, weathering resistance and electrical insulating property.Conventionally can be used as the substitute of DOP, be specially adapted in plastipaste, viscosity stability is good, is widely used in the products such as CABLE MATERIALS, adhesive tape, flooring laminate.
The secondary monooctyl ester of phthalic acid (DCP) is that phthalic anhydride and excessive secondary octanol, under catalyzer and discoloring agent existence, esterification generation occurs, in existing explained hereafter, generally can select an acidic catalyst that catalytic efficiency is high, but this type of catalyzer can make to need in production process a large amount of alkaliss and water, thereby can produce a large amount of high-COD waste waters, to environment.
Summary of the invention:
For the problems referred to above, the object of the invention is to a kind of new synthesis process that not only can improve DCP grade but also can significantly reduce the secondary monooctyl ester of phthalic acid of COD waste water generation.
The present invention is achieved by the following technical solutions.
A new synthesis process for the secondary monooctyl ester of phthalic acid, processing step comprises,
(1) by phthalic anhydride: secondary octanol mol ratio is that 1:2.6-2.8 gets raw material, and raw material phthalic anhydride and secondary octanol are fed in reactor;
(2) to the isopropyl titanate catalyzer that drops into the 0.9%-1.1% of phthalic anhydride and secondary octanol total amount in reactor, temperature reaction;
(3) reacted thick product dewaters, dealcoholysis, decolouring and filtration obtain the secondary monooctyl ester of finished product phthalic acid.
Beneficial effect: the mol ratio of having improved phthalic anhydride and secondary octanol can improve the grade of product, thereby the secondary monooctyl ester of the phthalic acid of the top grade product of acquisition constant product quality; This process selection isopropyl titanate is catalyzer, has replaced traditional acid catalyst, when having guaranteed that esterification is carried out smoothly, has saved a large amount of washing soda materials and water, produces hardly high-COD waste water in production process, meets the requirement of environmental protection.
Embodiment:
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1:
Get 148 kilograms of phthalic anhydrides, in 351 kilograms of input reactors of secondary octanol, drop into the isopropyl titanate catalyzer of 4.99 kilograms simultaneously, be warming up to 200-220 ℃ of reaction, obtain after completion of the reaction crude product, crude product is washed, obtained after dealcoholysis, decolouring and filtration to the secondary monooctyl ester of phthalic acid of top grade product.
Claims (1)
1. a new synthesis process for the secondary monooctyl ester of phthalic acid, is characterized in that: processing step comprises,
(1) by phthalic anhydride: secondary octanol mol ratio is that 1:2.7-2.8 gets raw material, and raw material phthalic anhydride and secondary octanol are fed in reactor;
(2) to the isopropyl titanate catalyzer that drops into the 1%-1.1% of phthalic anhydride and secondary octanol total amount in reactor, temperature reaction;
(3) reacted thick product is washed, after dealcoholysis, decolouring and filtration, is obtained the secondary monooctyl ester of finished product phthalic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612432.3A CN103664619A (en) | 2013-11-28 | 2013-11-28 | Novel synthesis process of dicapryl phthalate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612432.3A CN103664619A (en) | 2013-11-28 | 2013-11-28 | Novel synthesis process of dicapryl phthalate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103664619A true CN103664619A (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612432.3A Pending CN103664619A (en) | 2013-11-28 | 2013-11-28 | Novel synthesis process of dicapryl phthalate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103664619A (en) |
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2013
- 2013-11-28 CN CN201310612432.3A patent/CN103664619A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Yang Jian Document name: Notification of before Expiration of Request of Examination as to Substance |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |
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| WD01 | Invention patent application deemed withdrawn after publication |