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Fatty acid ester and preparation method thereof

A technology of fatty acid ester and fatty acid methyl ester, which is applied in the field of fatty acid ester and its preparation, and can solve the problems of producing dark products and low conversion rate of fatty acid ester

Inactive Publication Date: 2011-01-12
谢仁华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the reaction of fatty acid ester and sulfur trioxide as the main raw materials, it is often found that the conversion rate of fatty acid ester is not high, and dark products will be produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (Example 1, fatty acid methyl ester and preparation method thereof)

[0026] The iodine value of the fatty acid methyl ester of the present embodiment is 0.05, and its preparation method is as follows:

[0027] Put the commercially available saturated linear fatty acid methyl esters (hereinafter referred to as fatty acid methyl esters) with a carbon chain whose iodine value is greater than 1 and have 12 to 18 carbon atoms (hereinafter referred to as fatty acid methyl esters) and hydrogen into the heater, and heat it to 150°C with the heater, A material pump is used to pump liquid fatty acid methyl esters together with hydrogen into a fixed-bed hydrofinishing reactor equipped with a hydrogenation catalyst, and flow through the hydrogenation catalyst from top to bottom. The bulk density of the hydrogenation catalyst is 0.96 grams per cubic centimeter, and the aspect ratio of the reaction bed is 10. The reaction conditions are: pressure 3.0-6.0Mpa, hydrogen-oil ratio 300-...

Embodiment 2）

[0039] The rest of this embodiment are the same as Embodiment 1, the difference is:

[0040] The iodine value of the fatty acid methyl ester of the present embodiment is 0.06. The iodine value is also a set value. When setting the iodine value of the target product, it can be based on the iodine value of the raw material, the weight space velocity of the material, the hydrogen-oil ratio, and the system in the fixed-bed hydrofining reactor. The setting of the size of pressure realizes the iodine value of target product, and the setting principle of the iodine value in the following examples is the same.

[0041] The hydrogenation catalyst includes a carrier SiO 2 -Al2 o 3 , active ingredients and adjuvants.

[0042] Described active component comprises Mo, Ti, Zr and Ni, and the percentage that each active component accounts for the total weight of hydrogenation catalyst in terms of oxide is respectively:

[0043] MoO 3 12wt%,

[0044] TiO 2 8wt%,

[0045] ZrO...

Embodiment 3）

[0050] The rest of this embodiment are the same as Embodiment 1, the difference is:

[0051] The iodine value of the fatty acid methyl ester in this embodiment is 0.03 (this iodine value is also a set value).

[0052] The hydrogenation catalyst includes a carrier SiO 2 -Al 2 o 3 , active ingredients and adjuvants.

[0053] Described active component comprises Mo, Ti, Zr and Ni, and the percentage that each active component accounts for the total weight of hydrogenation catalyst in terms of oxide is respectively:

[0054] MoO 3 8wt%,

[0055] TiO 2 8wt%,

[0056] ZrO 2 8wt%,

[0057] NiO 15wt%.

[0058] The auxiliary agent is a mixture of rare earth metal lanthanum salt and cerium salt, accounting for 5wt% of the total weight of the hydrogenation catalyst in terms of oxides.

[0059] The preparation method of this hydrogenation catalyst is: SiO 2 -Al 2 o 3 The carrier is first impregnated with an aqueous solution containing soluble molybdenum salts,...

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Abstract

The invention discloses fatty acid ester and a preparation method thereof. The fatty acid ester is saturated straight-chain fatty acid methyl ester of which the carbon chain comprises 12 to 18 carbon atoms, or saturated straight-chain fatty acid ethyl ester of which the carbon chain comprises 12 to 18 carbon atoms, and the iodine value of the fatty acid ester is 0.01 to 0.1. The preparation method comprises the following steps of: heating hydrogen gas and the saturated straight-chain fatty acid ester of which the iodine value is more than 1 and the carbon chain comprises 12 to 18 carbon atoms to the temperature of between 150 and 180 DEG C, then pumping the mixture into a fixed bed type hydrofinishing reactor, wherein the mixture flows through a bed layer of a hydrogenation catalyst from top to bottom to perform an addition reaction; outputting the mixture from the fixed bed type hydrofinishing reactor; and performing distillation and decolorization on the mixture to obtain low-iodine-value fatty acid ester of which the iodine value is 0.01 to 0.1. The iodine value of the fatty acid ester prepared by the method is 0.01 to 0.1, and a fatty acid sulfonate prepared from the fatty acid ester is colorless and transparent, so the use of the fatty acid ester in a product with high requirements on color and luster is not influenced.

Description

technical field [0001] The invention relates to a fatty acid ester and a preparation method thereof, in particular to a fatty acid ester used for producing fatty acid ester sulfonate and a preparation method thereof. Background technique [0002] At present, fatty acid esters (mainly fatty acid methyl esters and fatty acid ethyl esters) are mainly used as raw materials for three types of products: biofuels, fatty alcohols and fatty acid ester sulfonates. The requirements for raw materials for different products are different: [0003] (1) Unsaturated fatty acid esters with a carbon chain length of C16-C18 are required as raw materials for biofuels. Due to the influence of natural conditions and climate, the freezing point of these unsaturated fatty acid esters is very high. Therefore, except in tropical and Outside the subtropical region, there are not many other places, so the use is greatly restricted. [0004] (2) As raw materials for fatty alcohols, mainly use C12-C14 m...

Claims

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Application Information

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IPC IPC(8): C07C69/24C07C67/60B01J23/883B01J27/16B01J23/887
Inventor 谢仁华谢晓晨戴正平陈锡武
Owner 谢仁华