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Esterification catalyst for rosin or derivatives thereof and application thereof

A technology for esterification catalysts and derivatives, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problems of many side reactions and large reaction energy consumption. , to achieve the effect of short reaction time, high quality esterification product and light color.

Active Publication Date: 2011-02-23
广州英科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The esterification reaction process of these catalysts catalyzing rosin or its derivatives requires high temperature (250~300°C) and long time (7~11h) ("Modern Chemical Industry", 1994, 2, p43), the reaction energy consumption is large, and the side reactions are many

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Get rosin 300 grams, 0.15 gram ionic liquid [HSO 3 -(CH 2 ) 4 -mim][H 2 PO 4 ], placed in a four-necked round-bottomed flask with dropping funnel, thermometer, stirrer, reflux condenser and water separator, and introduced N 2 , heated with an electric heating mantle until the reactants were dissolved, stirred, and when the temperature rose to 190°C, 33 grams of glycerin was added dropwise to the reaction system, and the temperature was raised after 1 hour of dripping, and the reaction temperature was controlled at about 250°C, and timed, 6 After one hour, the reaction was completed, and the heating was stopped. After the system was cooled to about 200° C., the reaction product was poured out, the color (Garner) was 4, and the conversion rate was greater than 98%.

Embodiment 2

[0019] Get 300 grams of rosin, 34 grams of pentaerythritol, 0.25 gram of ionic liquid [Emim] PTSA, insert in the four-neck round bottom flask that dropping funnel, thermometer, stirrer, reflux condenser and water separator are arranged, pass into N 2 , heated with an electric heating mantle until the reactants were dissolved, stirred, controlled the reaction temperature at about 260°C, and timed. After 7 hours, the reaction was completed, and the heating was stopped. After the system was cooled to about 220°C, the reaction product was poured out, the color (Garner) 4, The conversion was greater than 92%.

Embodiment 3

[0021] Get rosin 300 grams, 0.2 gram ionic liquid [Hmim] [HSO 4 ], placed in a four-necked round-bottomed flask with dropping funnel, thermometer, stirrer, reflux condenser and water separator, and introduced N 2 , heated with an electric heating mantle until the reactants were dissolved, stirred, and when the temperature rose to 190°C, 40 grams of ethylene glycol was added dropwise to the reaction system, and the temperature was raised after 2 hours, and the reaction temperature was controlled at about 240°C, and timed, 4 After one hour, the reaction was completed, and the heating was stopped. After the system was cooled to about 180° C., the reaction product was poured out, the color (Garner) was 4, and the conversion rate was greater than 92%.

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PUM

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Abstract

The invention relates to an esterification catalyst for rosin or derivatives thereof and application thereof. The catalyst is acid ionic liquid, a mixture of cations and anions or a compound consisting of the same; the cations are one or a mixture of more of alkyl quaternary ammonium ions, alkyl quaternary phosphonium ions, alkyl-substituted imidazole ions and alkyl-substituted pyridine ions; and the anions are one or a mixture of more of X-, AlX4-, BF4-, PF6-, TA-(CF3COO-), HB-(C3F7COO-), TfO-(CF3SO3-), NfO-(C4F9SO3-), Tf2N-((CF3SO2)2N-), Beti-((C2F5SO2)2N-), Tf3C-((CF3SO2-)3C-), SbF6-, AsF6-, CB11H12-, CH3COO-, NO3-, HSO4-, NO2-, CH3C6H4SO3- and H2PO4-, wherein X is Cl-, Br- or I-. In the esterification process, the esterification catalyst is 0.01 to 2 weight percent of the rosin or the derivatives thereof, the reaction temperature is 200 to 260 DEG C, and the reaction time is 2 to 7 hours. The catalyst has short reaction time and low reaction temperature; and an esterification product is uniform, transparent and light in color.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for catalyzing rosin or its derivatives and the application of the catalyst. Background technique [0002] Rosin is a high-yield resource in my country, with an annual output of 600,000 tons of gum rosin. As a natural resin with excellent performance, it has been widely used. However, rosin is brittle, easily oxidized, and not resistant to aging. To improve the practical value of rosin, it must be modified. Esterification of rosin is one of the most basic and important means of modification. After the esterification of rosin, not only the acid value is reduced, but the stability is improved, and the esterification products generally have the characteristics of water resistance, acid resistance and alkali resistance. Various rosin (including disproportionated rosin and hydrogenated rosin) esters account for more than 60% of rosin modified products, and their polyol esters are widely used ...

Claims

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Application Information

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IPC IPC(8): B01J31/02C09F1/04
Inventor 徐社阳肖舜通曾伟擘张振戈范德明
Owner 广州英科新材料有限公司
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