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Lipophilic load type NaHSO4 catalyst as well as preparation method and application thereof

A supported, catalyst technology, applied in the field of catalytic chemistry, can solve the problems of increased catalytic reaction yield and conversion rate, and achieve the effects of improved conversion rate, convenient separation and reuse, and high iodine value.

Inactive Publication Date: 2016-12-07
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the dehydration reaction of castor oil, NaHSO 4 Supported NaHSO formed on molecular sieves 4 Catalysts have the advantages of less by-products, high-quality products, and easy separation, but there is still room for improvement in the yield and conversion rate of catalytic reactions using this type of supported catalyst

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  • Lipophilic load type NaHSO4 catalyst as well as preparation method and application thereof

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preparation example Construction

[0016] The embodiment of the present invention proposes a lipophilic loaded NaHSO 4 The preparation method of catalyst comprises the following steps:

[0017] Modification step: uniformly mix the carrier material with the alkylsilane solution, filter and dry to obtain the lipophilic carrier material.

[0018] Further, the alkylsilane solution is prepared by mixing the alkylsilane with an organic solvent, wherein the alkylsilane is propyltriethoxysilane, octyltriethoxysilane, methyltriethoxysilane and dodecyltriethoxysilane At least one of the alkyl triethoxysilanes; the organic solvent is any one of toluene and xylene; the used alkyl silanes and organic solvents can be purchased directly from the market.

[0019] Specifically, the carrier material is at least one of MCM-41, MCM-48, MCM-50 and FSM-16. MCM-41, MCM-48, MCM-50 and FSM-16 are all molecular sieves, and can be purchased directly from the market.

[0020] Further, the mixing method of the carrier material and the a...

Embodiment 1

[0032] This embodiment provides a lipophilic NaHSO 4 / MCM-50 catalyst, its preparation steps are as follows:

[0033] Modification step: Add 0.1052g of octyltriethoxysilane to 50mL of xylene, stir and mix evenly, and add 2g of MCM-50 to it, reflux and stir at 150°C for 20h, then suction filter, and wash the filter residue with ethanol solution 2 times, and dried at 90°C for 10 hours to obtain lipophilic MCM-50;

[0034] Loading step: impregnate the above lipophilic MCM-50 in NaHSO 4 In aqueous solution, the NaHSO used 4 The aqueous solution consists of 0.353g NaHSO 4 Dissolved in 4.8mL of water to obtain, ultrasonic treatment for 3h, then separated and dried at 100°C for 8h to obtain lipophilic NaHSO 4 / MCM-50 catalyst.

Embodiment 2

[0036] This embodiment provides a lipophilic NaHSO 4 / MCM-41 catalyst, its preparation steps are as follows:

[0037] Modification step: Add 0.2222g of dodecyltriethoxysilane to 50mL of toluene, stir and mix evenly, and add 2g of MCM-41 to it, reflux and stir at 120°C for 24h, then suction filter, and filter the residue with ethanol solution Washing 3 times and drying at 80°C for 6 hours to obtain lipophilic MCM-41;

[0038] Loading step: impregnate the above lipophilic MCM-41 in NaHSO 4 In aqueous solution, the NaHSO used 4 The aqueous solution consists of 0.5g NaHSO 4 Dissolved in 4.8mL of water to obtain, ultrasonic treatment for 2h, then separated and dried at 120°C for 12h to obtain lipophilic NaHSO 4 / MCM-41 catalyst.

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Abstract

The invention provides a preparation method of a lipophilic load type NaHSO4 catalyst, and belongs to the field of catalytic chemistry. The preparation method comprises the following step: a loading material and an alkyl silane solution are uniformly mixed, filtering and drying are carried out, and a lipophilic carrier material is obtained; the lipophilic carrier material is dipped in an aqueous solution of NaHSO4, separation and drying are carried out, and the load type NaHSO4 catalyst is obtained. The method has the advantages of simple operation, stable process, and safety without toxicity; and the method is suitable for large scale industrial production. The invention also provides a lipophilic load type NaHSO4 catalyst which is prepared by the method; the catalyst has good hydrophobicity and lipophilicity, and has substantial catalysis effects for oil and fat substrates. The invention also provides an application of the lipophilic load type NaHSO4 catalyst to a dehydrated reaction of castor oil, conversion rate and yield of the reaction are good, quality of dehydrated castor oil which is obtained by the reaction is excellent, and the castor has high iodine number and low hydroxyl value.

Description

technical field [0001] The invention relates to the field of catalytic chemistry, and in particular to an lipophilic supported NaHSO4 catalyst and its preparation method and application. Background technique [0002] As the oil with the highest hydroxyl value, castor oil can be used to prepare many industrial derivatives, which is beyond the reach of any other natural raw materials. It is called the "king of oils" and "renewable petroleum resources". my country is a big producer of castor oil, but compared with developed countries, there is still a certain gap in the deep processing capacity of castor oil in our country. The dehydration reaction of castor oil is an important and basic reaction in the deep processing of castor oil. In-depth research on the dehydration reaction of castor oil is of great significance for improving the added value of castor oil and transforming resource advantages into economic advantages. [0003] NaHSO 4 Its aqueous solution is strongly aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C11B3/00
CPCB01J31/26C11B3/00
Inventor 丁建飞严翠霞马田林邵荣许伟
Owner YANCHENG INST OF TECH
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