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Preparation method of acidic polystyrene resin catalyst for synthesis of ethyl tert-butyl ether

A technology of polystyrene resin and ethyl tert-butyl ether, which is applied in the field of acidic polystyrene resin catalysts, can solve problems such as polluted products, increased side reactions of oligomerization, and easy drop-off of sulfonic acid groups

Inactive Publication Date: 2016-05-11
SINOPEC YANGZI PETROCHEM +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

The shortcomings are mainly reflected in: ①The stability of the resin catalyst is poor. When the temperature is raised (greater than 373.15K), the sulfonic acid group is easy to fall off, causing the catalyst to be deactivated and cannot be regenerated, corroding the equipment and polluting the product; As the temperature rises, the selectivity of the resin catalyst becomes worse, oligomerization side reactions increase, and by-products increase; ③ In order to increase the conversion rate of olefins and suppress side reactions in industry, a higher alcohol-ene ratio is often used, resulting in a higher demand. energy consumption to realize the recycling of reactants

Method used

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  • Preparation method of acidic polystyrene resin catalyst for synthesis of ethyl tert-butyl ether

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preparation example Construction

[0020] (1) Preparation of chloromethyl polystyrene resin

[0021] Mix polyvinyl alcohol (3.5g), sodium chloride (10.5g) and deionized water (350ml) to form a homogeneous aqueous solution, then add chloromethylstyrene (12ml), divinylbenzene (4ml), benzene After mixing ethylene (4ml) and toluene (24ml) to form a uniform oil phase, add it to the prepared water phase, and add the initiator azobisisobutylcyanide (1.75g) at the same time. After reacting for 8 hours, the product was washed with water, washed with methanol, Soxhlet extracted with dichloromethane, washed with ethanol, and dried in vacuum to obtain chloromethyl polystyrene resin;

[0022] (2) Preparation of acidic ionic liquid

[0023] React with imidazole (0.1mol) in ethanol (100ml) and 1,3-propane sultone (0.1mol) at 70°C for 12h, filter, wash with ethanol, and dry to obtain a white product. The white product (0.1 mol) was dissolved in deionized water, reacted with concentrated sulfuric acid (0.1 mol) at 60°C for 12...

Embodiment 1

[0027] Take 10.5 g of the prepared chloromethyl polystyrene resin, add 0.02 mol of the prepared acidic ionic liquid, and synthesize the acidic polystyrene resin catalyst according to the above steps for the synthesis of ethyl tert-butyl ether. Compared with the comparative example (the catalyst is chloromethyl polystyrene resin), the yield of ethyl tert-butyl ether has increased by 19%.

Embodiment 2

[0029] Take 10.5 g of the prepared chloromethyl polystyrene resin, add 0.05 mol of the prepared acidic ionic liquid, and synthesize the acidic polystyrene resin catalyst according to the above steps for the synthesis of ethyl tert-butyl ether. Compared with the comparative example (the catalyst is chloromethyl polystyrene resin), the yield of ethyl tert-butyl ether is increased by 27.5%.

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Abstract

The invention discloses a preparation method of an acidic polystyrene resin catalyst for synthesis of ethyl tert-butyl ether. An electron withdrawing group -CH2Cl is introduced between an aromatic ring and an acidic functional group of polystyrene resin to prepare a series of acidic polystyrene resin catalyst so as to reach the purpose of improving the thermal stability of the polystyrene resin catalyst. The prepared catalysts can be used for synthesis of ethyl tert-butyl ether. The catalyst shows high catalytic activity, and the yield of ethyl tert-butyl ether is in the range of 44.0%-65.0%.

Description

technical field [0001] The invention relates to the introduction of an electron-withdrawing group-CH2Cl between the aromatic ring and the acidic functional group of polystyrene resin, and by improving the thermal stability of the polystyrene resin catalyst, the acidic polystyrene suitable for the synthesis of ethyl tert-butyl ether is prepared. Styrene resin catalyst. Background technique [0002] With the increase of automobile ownership, the pollution caused by automobile exhaust to the environment is becoming more and more serious. In order to protect the environment, my country has formulated new vehicle emission standards and the latest clean gasoline standards, which put forward higher requirements for the quality of vehicle gasoline. The development trend of motor gasoline is unleaded, high octane number, low vapor pressure, low olefin and high oxygen content. FCC gasoline is one of the important sources of motor gasoline, which has a direct impact on the quality of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/14C08F212/36C08F212/08C08F8/36B01J31/06C07C43/04C07C41/09
Inventor 缪金妹许平利杨苏平黄贤平张敏
Owner SINOPEC YANGZI PETROCHEM
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