Method for synthesizing dimer acid by compounding catalyst

A compound catalyst and dimer acid technology, which is applied in chemical instruments and methods, preparation of organic compounds, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low dimer acid content and yield, unfavorable Environmental protection and other issues, to achieve significant catalytic effect, less usage, low polymerization temperature

Active Publication Date: 2015-04-22
安徽虹泰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content and yield of dimer acid obtained by traditional methods are low, and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Cottonseed oleic acid 1000g, add propane sultone 5g and potassium iodide 3g compound, stir and mix well, control the pressure below 3atm, react at 180°C for 3h, let stand and cool down to 120°C to separate the reactants , to obtain crude dimer acid with a viscosity of 1000mPa.s / 25°C, a conversion rate of 79%, and a color of 4#. The crude dimer acid is washed with water at 85°C and centrifuged for dehydration, then enters a thin-film evaporator for dehydration and dehydration at 160°C, and then enters a short-path distiller for separation at a temperature of 230°C and a vacuum of 30Pa to obtain dimer acid and monomeric acid. Dimer acid 6500mPa.s / 25℃, color 7#.

example 2

[0018] (1) Soybean oleic acid 1000g, add propane sultone 6g and potassium iodide 2g compound, stir and mix thoroughly, control the pressure below 3atm, react at 200°C for 2.5h, let stand and cool down to 130°C for separation and reaction The crude dimer acid was obtained with a viscosity of 1100mPa.s / 25°C, a conversion rate of 80%, and a color of 4.5#. The crude dimer acid is washed with water at 90°C and dehydrated by centrifugation, then enters a thin-film evaporator at 160°C for dehydration and dehydration, and then enters a short-path distiller at a temperature of 230°C and a vacuum of 20 Pa for separation to obtain dimer acid and monomeric acid. Dimer acid 7000mPa.s / 25℃, color 7.5#.

example 3

[0020] (1) Tall oleic acid 1000g, add propane sultone 7g and potassium iodide 2g compound, stir and mix thoroughly, control the pressure below 3atm, react at 220°C for 3.5h, let stand and cool down to 110°C for separation The reactant obtained crude dimer acid with a viscosity of 980mPa.s / 25°C, a conversion rate of 78.5%, and a color of 4#. The crude dimer acid is washed with water at 80°C and centrifuged for dehydration, then enters a thin film evaporator at 160°C for dehydration and dehydration, and then enters a short-path distiller at a temperature of 230°C and a vacuum of 10 Pa for separation to obtain dimer acid and monomeric acid. Dimer acid 6500mPa.s / 25℃, color 7#.

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PUM

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Abstract

The invention discloses a method for synthesizing a dimer acid by compounding a catalyst. The method comprises the following steps: adding a complex of a catalyst propane sultone and potassium iodide into a vegetable oil acid, sufficiently stirring, uniformly mixing, controlling the pressure to be less than 3atm, implementing reaction for 2-4 hours at 180-220 DEG C, standing still for cooling to100-150 DEG C, and separating the reactant, thereby obtaining crude dimer acid; washing the crude dimer acid with 80-90 DEG C water, centrifuging to dehydrate, feeding into a membrane evaporator to remove steam at 160 DEG C, and further adding into a short-course distiller for separation at 230 DEG C in the vacuum less than 30Pa, thereby obtaining the dimer acid and a monomer acid. The propane sultone and the potassium iodide are adopted to compound the catalyst, the catalysis effect is remarkable, the use amount is very small, the polymerization temperature is relatively low, the phenomenon that the dimer acid is adsorbed by hargil in an ordinary process is avoided, and the content and the yield of the dimer in the product are both further increased.

Description

technical field [0001] The invention belongs to the field of dimer acid production, in particular to a method for synthesizing dimer acid with compound catalyst. Background technique [0002] Dimer acid, also known as dimer fatty acid, is a colorless transparent liquid, mainly used as a modifier of polyamide resin and epoxy resin and an additive of fuel oil, lubricating oil and cutting oil. It is widely used in the synthesis of printed circuit boards Materials, ink manufacturing, rocket engine materials and other fields, dimer acid with higher purity is light yellow viscous liquid, and dimer acid with lower purity is reddish brown viscous liquid. [0003] The traditional atmospheric pressure polymerization process of dimer acid is generally to put 12%-15% clay into vegetable oleic acid, 0.6% lithium carbonate, polymerization temperature 230-250℃, reaction time 4-6h, and then acidify and filter to obtain crude dimer acid, while clay belt The crude dimer acid is about 10%, th...

Claims

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Application Information

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IPC IPC(8): C07C55/02C07C51/353B01J31/26
CPCB01J31/26C07C51/353C07C51/43C07C51/44C07C55/02
Inventor 王学峰王文耕
Owner 安徽虹泰新材料股份有限公司
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