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Method for modifying vegetable oils and primary plasticizer for vinyl polymers

A technology of vegetable oil modification and vegetable oil, which is applied in the preparation of ester group and hydroxyl reaction, fatty acid esterification, fatty acid oxidation, etc.

Inactive Publication Date: 2012-10-31
NPC IND QUIMICAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] There are other disadvantages in the known state of the art methods of modifying vegetable oils which are related to the purification of fatty acid esters
When the process includes transesterification of vegetable oils, glycerol separation may be required for a long time, washing of the product may require large amounts of water and removal of excess alcohol (if it exhibits a high boiling point) often requires high vacuum, which requires a huge investment

Method used

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  • Method for modifying vegetable oils and primary plasticizer for vinyl polymers
  • Method for modifying vegetable oils and primary plasticizer for vinyl polymers
  • Method for modifying vegetable oils and primary plasticizer for vinyl polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061]Transfer about 55 kg of isoamyl alcohol to the catalyst preparation tank. After the system was made inert with nitrogen, 0.7 kg of sodium was added to the alcohol. After the reaction was complete, the catalyst-containing alcohol was transferred to a reactor previously loaded with 100 kg of epoxidized soybean oil (Drapex 6.8; epoxy index = 6.7%) at 70°C. Stirring at 200 rpm, the reaction was kept at 75°C for 2.5 hours. After this period, stirring was discontinued and the system was allowed to stand for 30 minutes. Most of the glycerol produced in the reaction was then drained off and the reaction mixture was transferred to a decanter. Water (approximately 20 L) and phosphoric acid (in an amount sufficient for neutralization) were added and the mixture was stirred for 15 minutes. After standing still for 1 hour, the water containing salt and remaining glycerin was drained off. The mixture containing product and alcohol was transferred to a stripper operated at 150°C un...

Embodiment 2

[0063] About 700 g of isononanol was reacted with 4.8 g of sodium metal under a nitrogen atmosphere. The alkoxide obtained in this way was reacted with 800 g of epoxidized soybean oil (Drapex 6.8; epoxy index = 6.7%) at 90° C. for 2.5 hours. Neutralization, washing and stripping were performed as described in Example 1. After filtration, about 970 g of epoxidized isononyl fatty acid was isolated with the following properties: Acidity Index = 0.95 mg KOH / g; Epoxy Index = 4.8%; Density [20° C.] = 0.923 g.cm -3 ; Chromaticity APHA = 400; Viscosity [20°C] = 47cP.

Embodiment 3

[0065] Under a nitrogen atmosphere, about 800 g of isononanol was reacted with 4.9 g of sodium metal. After the reaction of sodium and alcohol was completed, 800 g of refined linseed oil was added to the resulting alkoxide, and the reaction was kept at 85° C. for 2.5 hours. After separation of the glycerol, the reaction mixture was neutralized, washed and stripped. After filtration, about 1000 g of fatty acid isononyl esters were isolated. About 500 g of this product were subsequently epoxidized with performic acid generated in situ at a double bond:formic acid:hydrogen peroxide molar ratio of 1:0.65:2. The epoxidation was continued at 70° C. for 5 hours, and after washing the reaction mixture with dilute base, followed by drying and filtration, about 520 g of epoxidized isononyl fatty acid esters were obtained with the following properties: acidity index = 0.25 mg KOH / g; epoxy index = 6.15%; density [20°C] = 0.942g.cm -3 ; Chromaticity APHA = 60; Viscosity [20° C.] = 51 c...

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Abstract

The present invention refers to a process for modifying epoxidized or non-modified vegetable oils. More specifically, it refers to the process through which vegetable oils and alcohols are converted into fatty acid alkyl esters through transesterification. The present invention also refers to the products obtained through the process disclosed herein.

Description

field of invention [0001] The present invention relates to methods for modifying vegetable oils. More particularly, the invention relates to methods for converting vegetable oils and alcohols to epoxidized fatty acid alkyl esters. The invention also relates to the products obtained by the methods disclosed herein. The products are useful as primary plasticizers for vinyl polymers, especially for halogenated plastics, especially polyvinyl chloride (PVC). Background of the invention [0002] Polyvinyl chloride (PVC) is the well known and most widely used vinyl polymer. It is mainly used in two forms: (i) rigid PVC; and (ii) flexible PVC. The rigid form of PVC known as non-plasticized PVC is commonly used in the production of pipes, joints, profiles and frames and applications where chemical resistance is required. Flexible forms of PVC, also known as plasticized PVC, are used in films; coverings; electrical insulators; flooring; toys; wallpapers; synthetic leather for clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10C07C59/305C07D301/10
CPCC11C3/006C07C67/03C11C3/003C11C3/06C07C69/24C07C69/52
Inventor M.S.科戴罗S.泰谢拉A.F.朱尼奥
Owner NPC IND QUIMICAS
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