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Solid acid catalyst and preparation method thereof

A solid acid catalyst and catalyst technology, applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, can solve problems such as easy loss, difficult catalysts, and catalyst deactivation, so as to maintain drug efficacy and be suitable for Industrial application, highly selective effect

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of ethyl linoleate using solid acid as a catalyst generally requires further improvement in the long-term operation stability of the catalyst to better meet the needs of industrial applications.
This is mainly because SO 4 2- It is easy to lose, causing catalyst deactivation, and it is difficult to regenerate the deactivated catalyst

Method used

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  • Solid acid catalyst and preparation method thereof
  • Solid acid catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~5

[0023] Prepare Zr(NO 3 ) 4 ·5H 2 O and Al (NO 3 ) 3 9H 2 O mixed aqueous solution, add ammonia water dropwise under stirring conditions until the pH value is 8-9 to form a white precipitate, after the precipitation is completed, increase the pH to 10-11 and age at room temperature for 24 hours, filter with suction, wash with water, and dry at 110°C for 12 hours to obtain ZrO 2 -Al 2 o 3 carrier. The carrier was immersed in sulfuric acid solution for 60 minutes, evaporated to dryness, and then placed in NH 4 VO 3 Equal volume impregnated in the solution, dried, and then baked at 600°C for 4 hours to obtain V 2 o 5 -SO 4 2- / ZrO 2 -Al 2 o 3 catalyst. By changing Zr(NO 3 ) 4 ·5H 2 O, Al (NO 3 ) 3 9H 2 The amount of O added, sulfuric acid solution, NH 4 VO 3 The concentration of the solution makes the composite solid superacid V of different mass percentages 2 o 5 -SO 4 2- / ZrO 2 -Al 2 o 3 A series of catalysts, see Table 1 for details.

[00...

Embodiment 1

[0027] Application of the catalyst prepared in Examples 1-5 in the synthesis of ethyl linoleate. At the top and bottom of a stainless steel fixed bed reactor with a size of Φ18mm×1200mm, quartz sand with a diameter of Φ0.5mm to 1.2mm is respectively loaded, and 30ml of the above-mentioned formed V is filled in the middle. 2 o 5 -SO 4 2- / ZrO 2 -Al 2 o 3 After the catalyst is replaced by nitrogen three times, after the airtightness is qualified, octadecadiene-[9,12] and acetic acid are sent to the preheater according to the prescribed ratio by the metering pump, and the preheated reaction materials enter the fixed bed The reactor was reacted, and its reaction conditions and long-term operation 1000h reaction results are shown in Table 2, wherein serial numbers 6-10 are the catalysts prepared in Examples 1-5, for example, serial number 6 represents the catalyst prepared in Example 1.

[0028] Table 2

[0029]

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Abstract

The invention discloses a solid acid catalyst and a preparation method thereof. The catalyst has a composition of V2O5-SO4<2-> / ZrO2-Al2O3, and comprises, by weight, 2-10% of V2O5, 8-20% of SO4<2->, 20-50% of ZrO2 and 35-70% Al2O3. The preparation method of the solid acid catalyst is as below: first preparing ZrO2-Al2O3 composite metal oxide, then successively loading SO4<2-> and V2O5 on the ZrO2-Al2O3 composite metal oxide to prepare the V2O5-SO4<2-> / ZrO2-Al2O3 solid acid catalyst. The invention discloses the application of the V2O5-SO4<2-> / ZrO2-Al2O3 solid acid catalyst to the synthesis of ethyl linoleate. The catalyst has high activity stability in the synthesis of ethyl linoleate.

Description

technical field [0001] The invention relates to a solid acid catalyst and its preparation method and application. The solid acid catalyst is suitable for synthesizing ethyl linoleate. Background technique [0002] Ethyl linoleate (octadecadien-[9,12]-oic acid ethyl ester) is an unsaturated fatty acid ethyl ester containing 18 carbon atoms and 2 double bonds, and is a colorless to pale yellow oily liquid . In terms of medicine, ethyl linoleate has many properties better than linoleic acid currently used, especially as a drug raw material for preventing and treating cerebral thrombosis, arteriosclerosis and other diseases, it shows better curative effect, and is a substitute for linoleic acid In the field of cosmetics, its excellent lipophilicity can assist other active ingredients to penetrate the stratum corneum of the skin to reach the epidermis and dermis, preventing skin cell lipid peroxidation and free radical damage caused by ultraviolet rays. Therefore, ethyl linolea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053C07C69/587C07C67/05
Inventor 李花伊霍稳周吕清林刘野魏晓霞田丹
Owner CHINA PETROLEUM & CHEM CORP
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