Preparation method of pi complexing adsorbing agent used for separating saturated fatty acid methyl ester from unsaturated fatty acid methyl ester

A fatty acid methyl ester, complex adsorption technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem that thiophene and its derivatives cannot be removed, and the sulfur content cannot reach environmental protection. requirements and high costs, to achieve the effects of high production safety, low process temperature and low energy consumption

Inactive Publication Date: 2011-06-15
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The governments of various countries have higher and higher requirements for the desulfurization depth of vehicle fuels, but the catalytic hydrodesulfurization technology currently used can only effectively remove mercaptans, sulfides, and disulfides, but cannot remove thiophene and its derivatives, making Sulfur content cannot meet environmental protection requirements
In order to reduce the sulfur content to the allowable range, the size of the existing reactor needs to be increased by 5 to 15 times, which is too expensive to be feasible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a.Fe 3 O 4 preparation of

[0033] In a four-neck glass flask, room temperature and N 2 Under protective conditions, add 25% ammonia water 35mL, NH 4 NO 3 5.4g of solid and 65g of distilled water are made into an alkaline buffer solution, and then 1.2g of surfactant TX-100 is added dropwise; then, another 20g of FeCl is added to the container 2 , 30gFeCl 3 and distilled water 100g to form a mixed solution of Fe salt, and then drop the mixed solution of Fe salt and 25g of ammonia water with a concentration of 25% into a four-neck flask at the same speed; Separation to neutrality and no obvious foam, vacuum filtration to obtain Fe 3 O 4 filter cake; produced Fe 3 O 4 The particles are small and uniform, with good magnetic properties.

[0034] b.Fe 3 O 4 Preparation of chitosan microspheres

[0035] Dissolve 5g of chitosan with a deacetylation degree of 95% in acetic acid with a concentration of 20% to prepare a solution for use; at 40°C, add 25g of liquid par...

Embodiment 2

[0041] a.Fe 3 O 4 preparation

[0042] In a four-neck glass flask, room temperature and N 2 Under protective conditions, add 35mL of ammonia water with a concentration of 30%, NH 4 NO 3 Solid 5.4g and distilled water 65g are made into alkaline buffer solution, then drop into 1.2g surfactant hexadecyltrimethylammonium bromide CTAB; Then, add 20gFeCl in addition 2 , 30gFeCl 3 and distilled water 100g to make Fe salt mixed solution, then, at the same time, drop Fe salt mixed solution and 30% ammonia water 28g into the four-necked flask at the same speed; react for 30min after dropping; wash with distilled water 4 times, and Separation to neutrality and no obvious foam, vacuum filtration to obtain Fe 3 O 4 filter cake.

[0043] b.Fe 3 O 4 Preparation of chitosan microspheres

[0044] Dissolve 5g of chitosan with a deacetylation degree of 95% in acetic acid with a concentration of 20% to prepare a solution for use; at 40°C, add 20g of liquid paraffin, 40g of petroleum et...

Embodiment 3

[0050] a.Fe 3 O 4 preparation

[0051] In a four-neck glass flask, room temperature and N 2 Under protective conditions, add 35mL of ammonia water with a concentration of 32%, NH 4 NO 3 5.4g of solid and 65g of distilled water are made into alkaline buffer solution, and then 1.2g of sodium dodecylbenzenesulfonate DBS is added dropwise; then, another 20g of FeCl is added to the container 2 , 30gFeCl 3 and distilled water 100g to form a mixed solution of Fe salt, then, at the same time, drop the mixed solution of Fe salt and 23g of ammonia water with a concentration of 32% into a four-necked flask; Separation to neutrality and no obvious foam, vacuum filtration to obtain Fe 3 O 4 filter cake.

[0052] b.Fe 3 O 4 Preparation of chitosan microspheres

[0053] Dissolve 5g of chitosan with a deacetylation degree of 95% in acetic acid with a concentration of 20% to prepare a solution for use; at 40°C, add 30g of liquid paraffin, 30g of petroleum ether and 1.5g of Span-80 t...

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PUM

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Abstract

The invention discloses a preparation method of a pi complexing adsorbing agent used for separating saturated fatty acid methyl ester from unsaturated fatty acid methyl ester, which comprises the steps of: mixing Fe<2+> salt with Fe<3+> salt to prepare a Fe salt solution, and then undergoing a crosslinking reaction with chitosan to prepare a magnetic chitosan microsphere; and preparing a magnetic chitosan silver ion loaded adsorbing agent by using a dipping method to obtain the pi complexing adsorbing agent. Through tests, mixed fatty acid methyl ester is adsorbed and separated by adopting the magnetic chitosan loaded silver ion adsorbing agent, thus the iodine value of the mixed fatty acid methyl ester is improved to above 160. The preparation method is characterized in that silver ions are loaded by adopting a magnetic chitosan microsphere dipping method, and the prepared adsorbing agent has the advantages of high efficiency of separating the saturated fatty acid methyl ester from the unsaturated fatty acid methyl ester, less fuel consumption, compact structure of a device, investment saving and safety in operation.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a preparation method of a π-complex adsorbent for separating saturated and unsaturated fatty acid methyl esters. Background technique [0002] The π-complex adsorption separation technology has the potential to replace the high-energy-consuming rectification process and is used to deal with difficult-to-separate systems, such as CO-N 2 and C 2 h 4 -C 2 h 6 Therefore, it has attracted extensive attention from researchers all over the world in recent years. Among them, the research group of the University of Michigan is the most active and has reported a series of research results. Domestic Peking University, Institute of Adsorption and Separation Technology of Nanjing University of Technology, Dalian University of Technology, etc. are all conducting research work in this area. The key to π-complex adsorption separation is to develop π-complex adsorbents with high sele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/06B01J20/28B01J20/32
Inventor 匙伟杰吴运娟刘京华刘振法
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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