Use of silica-zirconia catalysts in processes for reducing glycidol, glycidyl esters, or both glycidol and glycidyl esters

A glycidyl ester, silica technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst activation/preparation, etc., can solve inefficient operation costs, reduce market prices, Reduce oil quality and other issues

Pending Publication Date: 2022-03-18
WR GRACE & CO CONN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only are these known methods inefficient and costly to operate, but they further reduce oil quality and lower market prices

Method used

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  • Use of silica-zirconia catalysts in processes for reducing glycidol, glycidyl esters, or both glycidol and glycidyl esters
  • Use of silica-zirconia catalysts in processes for reducing glycidol, glycidyl esters, or both glycidol and glycidyl esters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-

[0081] Embodiment 1-control experiment

[0082] The above reaction procedure is used in the following examples. Soybean oil spiked with glycidyl oleate was mixed and heated to a maximum temperature of 90°C under argon. As shown in Table 2 below, the total glycidol concentration in the reaction mixture was measured over 30 minutes.

[0083] Table 2. Control experiment results

[0084] Reaction time Glycidol(ppm) adulterated soybean oil 22.35 Heat to 90°C 22.58 15 minutes 24.56 30 minutes 23.12

[0085] As shown in Table 2, there was no glycidyl / glycidyl oleate reduction in the absence of catalyst addition to the reaction mixture.

Embodiment 2

[0086] Example 2 - Silica zirconia catalyst dosage effect into reaction mixture

[0087] The catalyst synthesis and reaction methods described above are used in the following examples. Catalyst A of the present invention was added to soybean oil spiked with glycidyl oleate at 0.5%, 1.0%, 1.5% and 2.0% by weight based on the total weight of the silica-zirconia catalyst and soybean oil. The reaction mixture was mixed and heated to a maximum temperature of 90 °C under argon. As shown in Table 3 below, the concentration of total glycidol in the reaction mixture was measured before and after 30 minutes.

[0088] Table 3. Epoxide reduction at various catalyst dosages

[0089] Catalyst dosage wt% Initial glycidol (ppm) Final glycidol (ppm) 0.5 9.79 1.62 1.0 10.24

1.5 10.38

2.0 17.90

[0090] Limit of quantitation (LOQ) = 0.20ppm

[0091] As shown in Table 3, dosages as low as 0.5% by weight of the silica-zircon...

Embodiment 3

[0092] Example 3 - Zirconia Concentration and Its Effect on Total Glycidol Reduction

[0093] The catalyst synthesis and reaction methods described above are used in the following examples. Catalysts A, B, C and D of the present invention were added to soybean oil spiked with glycidyl oleate. A silica / zirconia catalyst of 2.0% by weight based on the total weight of catalyst and soybean oil was used. The reaction mixture was mixed and heated to a maximum temperature of 90 °C under argon. As shown in Table 4 below, the concentration of total glycidol in the reaction mixture was measured before and after 30 minutes.

[0094] Table 4. Glycidol reduction at various zirconia concentrations

[0095] catalyst Initial glycidol (ppm) Final glycidol (ppm) A 17.90

[0096] As shown in Table 4, increasing the concentration of zirconia on the silica base significantly improved the reduction of glycidol / glycidyl oleate in the reaction mixture.

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Abstract

A method of using a silica-zirconia catalyst in a method of reducing the amount of glycidol, glycidyl ester, or both glycidol and glycidyl ester from a triglyceride-containing composition, such as an edible oil, is disclosed. The invention also discloses a silica-zirconia catalyst and a method for preparing the silica-zirconia catalyst.

Description

technical field [0001] The present invention relates to the use of silica-zirconia catalysts in a process for reducing the amount of glycidol, glycidyl esters, or both glycidol and glycidyl esters in triglyceride-containing compositions. The invention also relates to silica-zirconia catalysts and methods of preparing silica-zirconia catalysts. Background technique [0002] Glycidyl esters are known carcinogens and mutagens present in processed edible oils. These thermally generated pollutants are formed at temperatures as low as 200°C; however, much higher temperatures are required to remove various volatile components in the oil during deodorization. After crude oil has undergone primary refining, bleaching, and deodorization (RBD), additional oil processing is required to reduce the glycidyl ester concentration to acceptable regulatory limits. These reduction methods include a combination of processes including, but not limited to, contacting the oil with enzymes, shear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/28C04B41/48C07K14/435
CPCC01P2004/84C01G25/00C01P2004/61C01P2004/60C01P2006/14C01P2006/16C01P2006/12C11B3/00B01J21/066B01J21/08B01J37/0203B01J37/086B01J23/002C11B3/02
Inventor 德米特里厄斯·米克斯C·L·格兰姆斯C·利巴纳蒂I·卡图奇
Owner WR GRACE & CO CONN
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