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Sheet catalyst for synthesis of dimmer acid ester and preparation method thereof

A technology for dimer esters and catalysts, which is applied in the field of sheet-like catalysts for the synthesis of dimer esters and its preparation, can solve problems such as excessive product entrainment, difficulty in catalyst regeneration, and product loss, so as to improve reaction activity and selectivity, Conducive to molding and mechanical strength, the effect of increasing pore volume

Active Publication Date: 2009-02-18
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, 200-mesh activated clay or smectite is used as a catalyst for the synthesis of dimer esters. Its catalytic activity is good, and the reaction temperature is 180-260°C. However, it is difficult to separate the catalyst from the product, and the product is often entrained, making it difficult to regenerate the catalyst.
Existing literature (Zhang Shulin. Synthesis and industrial application of dimer acid [J]. Fine Petrochemical Industry, 1995, (6): 71~75) points out that the shortcoming of clay catalyst process is that clay will absorb a certain amount of polymeric acid, discard White clay not only causes product loss, but also causes environmental pollution
After searching, there is no Chinese invention patent related to the synthesis of dimer ester catalyst and its preparation method; in addition, there is no foreign invention patent related to the synthesis of dimer ester catalyst and its preparation method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Get particle size and be 74 grams of activated clay of 150~250 purposes, 7.5 grams of cocatalyst NaOH, 18.5 grams of water (mass proportion is: activated clay 74%, NaOH7.5%, water 18.5%), after it is mixed evenly, adopt pressing Tablet machine pressed into ф5 × 5mm tablets. It was dried at 105°C for 12 hours, calcined at 400°C for 3 hours, and cooled to obtain a sheet-shaped catalyst for future use.

[0012] Mix 100 grams of raw materials with fatty acid methyl esters and 11 grams of the above-mentioned sheet-shaped catalyst, add them into a 250 ml three-necked flask equipped with a condenser tube, a thermometer and a stirrer, and react at 250° C. for 8 hours. After the reaction is finished, the sheet-shaped catalyst is basically intact, the product is easy to separate, and the yield of methyl dimer acid is 71.0%. Compared with the same amount of powdered activated clay catalyst, the product yield is increased by 9.0%.

Embodiment 2

[0014] Get particle size and be 75 grams of activated clay of 150~250 meshes, 5 grams of cocatalyst CaO, 20 grams of water, (mass proportion is: activated clay 75%, CaO 5%, water 20%), after it is mixed evenly, adopt pressing Tablet machine pressed into ф5 × 5mm tablets. It was dried at 105°C for 12 hours, calcined at 400°C for 3 hours, and cooled to obtain a sheet-shaped catalyst for future use.

[0015] Mix 100 grams of raw materials with fatty acid methyl ester and 10 grams of the above-mentioned sheet-shaped catalyst into a 250 ml three-necked flask equipped with a condenser tube, a thermometer and a stirrer, and react at 250° C. for 8 hours. After the reaction is finished, the flake catalyst is basically intact, the product is easy to separate, and the yield of methyl dimer acid is 66.0%. Compared with the same amount of powdery activated clay catalyst, the product yield is increased by 8.5%.

Embodiment 3

[0017] Get granularity and be 75 grams of activated clay of 150~250 purposes, 2.5 grams of promoter potassium carbonate, 22.5 grams of water, (mass proportion is: activated clay 75%, potassium carbonate 2.5%, water 22.5%), after it is mixed homogeneously, Use a tablet machine to press into ф5×5mm tablets. It was dried at 105°C for 12 hours, calcined at 400°C for 3 hours, and cooled to obtain a sheet-shaped catalyst for future use.

[0018] Mix 100 grams of raw materials with fatty acid methyl ester and 9 grams of the above-mentioned sheet-shaped catalyst, add them into a 250 ml three-neck flask equipped with a condenser tube, a thermometer and a stirrer, and react at 250° C. for 8 hours. After the reaction is over, the flake catalyst is basically intact, the product is easy to separate, and the yield of methyl dimer acid is 63.3%. Compared with the same amount of powdered activated clay catalyst, the product yield is increased by 8.0%.

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Abstract

A novel flaky catalyst for synthesizing a dimmer acid ester consists of activated clay, a promoter and an adhesive pore-forming agent, wherein the activated clay accounts for 65-85 percent, the promoter accounts for 2-10 percent, and the adhesive pore-forming agent accounts for 13-25 percent. The preparation method for the catalyst comprises the following steps of: preparing the powder of the activated clay with a particle size of 150-250 meshes; mixing the raw materials evenly according to the partition ratio; tabletting and forming; drying the mixture at 105 DEG C; calcining the mixture at 300-400 DEG C; and cooling down and packaging the mixture. The method is simple and feasible. The catalyst which has good activity and high strength is easy to be separated from products with less products carried. In addition, the catalyst is easy to be regenerated.

Description

technical field [0001] The invention belongs to a catalyst preparation method, in particular to a sheet-shaped catalyst for synthesizing dimer esters and a preparation method thereof. Background technique [0002] Generally, 200-mesh activated clay or smectite is used as a catalyst for the synthesis of dimer esters. Its catalytic activity is good, and the reaction temperature is 180-260 ° C. However, it is difficult to separate the catalyst from the product, the product is more entrained, and the catalyst regeneration is difficult. Existing literature (Zhang Shulin. Synthesis and industrial application of dimer acid [J]. Fine Petrochemical Industry, 1995, (6): 71~75) points out that the shortcoming of clay catalyst process is that clay will absorb a certain amount of polymeric acid, discard White clay not only causes product loss, but also causes environmental pollution. After searching, there is no Chinese invention patent related to the synthesis of dimer ester catalyst a...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J21/16C07C67/465
Inventor 王车礼田刚李为民姚超邬国英林西平
Owner 溧阳常大技术转移中心有限公司
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