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Resin catalyst for polyoxymethylene dimethyl ether DMM3-8 synthesis and preparation method thereof

A polymethoxydimethyl ether and catalyst technology, which is used as a catalyst in etherification organic catalytic reaction and its preparation field, can solve the problems of increasing catalyst preparation cost, harsh process conditions, difficult product competitiveness and the like, and achieves pore size The effect of moderate size, high reactivity and lower production cost

Inactive Publication Date: 2017-07-14
丹东明珠特种树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resin catalyst modification process has complicated steps and harsh process conditions, which greatly increases the cost of catalyst preparation and makes it difficult to have product competitiveness

Method used

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  • Resin catalyst for polyoxymethylene dimethyl ether DMM3-8 synthesis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of catalyst C-1

[0019] ①, polymerization reaction:

[0020] A water phase was added to a 10-liter stainless steel stirred tank with a reflux condensing device, the oil phase was added after warming up to 65°C, and the temperature was raised to 85°C with stirring, and the reaction was performed for 10 hours;

[0021] The water phase is composed of 25g of polyvinyl alcohol, 15g of sodium styrene sulfonate, 30g of propylene glycol monomethyl ether, and 5g of sodium dodecylbenzenesulfonate, added with 4500g of water, heated and stirred until each component is completely dissolved ;

[0022] Described oil phase is the organic phase that styrene 870g, divinylbenzene 430g, tetrahydrofuran 350g and benzoyl peroxide 10g are mixed to form;

[0023] ②, pore structure purification:

[0024] Filter the product of step 1. The obtained polymer white spheres are placed in deionized water at 90°C, boiled under reduced pressure for 6 hours under a pressure of -0.095MPa, ...

Embodiment 2

[0029] Catalyst C-2:

[0030] ①, polymerization reaction:

[0031] Add the water phase to the 10-liter stainless steel stirred tank with the reflux condensing device, add the oil phase after warming up to 70°C, stir and heat up to 85°C, and react for 10 hours;

[0032] The water phase is composed of 30g of polyvinyl alcohol, 25g of sodium styrene sulfonate, 20g of propylene glycol monomethyl ether, and 8g of sodium dodecylbenzenesulfonate, added with 4500g of water, heated and stirred until each component is completely dissolved ;

[0033] Described oil phase is the organic phase that is formed by mixing styrene 820g, divinylbenzene 450g, tetrahydrofuran 350g and benzoyl peroxide 10g;

[0034] ②, pore structure purification:

[0035] The polymer white spheres obtained by filtering the product of step 1 reaction were placed in deionized water at 80°C, boiled under reduced pressure for 6 hours under a pressure of -0.090MPa, washed twice with deionized water, and air-dried at ...

Embodiment 3

[0040] Catalyst C-3:

[0041] ①, polymerization reaction:

[0042] Add the water phase to the 10-liter stainless steel stirred tank with the reflux condensing device, add the oil phase after warming up to 70°C, stir and heat up to 85°C, and react for 10 hours;

[0043] Described water phase is polyvinyl alcohol 20g, styrene sulfonate sodium 35g, propylene glycol monomethyl ether 25g, dodecylbenzene sulfonate 10g sodium, add 4000g of water, heat, stir until each component dissolves completely;

[0044] Described oil phase is the organic phase that is formed by mixing styrene 810g, divinylbenzene 490g, 2-methyltetrahydrofuran 350g and benzoyl peroxide 10g;

[0045] ②, pore structure purification:

[0046] The polymer white spheres obtained by filtering the product of step 1 reaction were placed in 80°C deionized water, boiled under reduced pressure for 6 hours under a pressure of -0.095MPa, washed twice with deionized water, and air-dried at room temperature;

[0047] ③, Sulf...

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Abstract

The application of the patent provides a resin catalyst for polyoxymethylene dimethyl ether DMM3-8 synthesis and a preparation method thereof. The resin catalyst for polyoxymethylene dimethyl ether DMM3-8 synthesis is prepared by the following steps: carrying out suspension copolymerization on styrene and divinyl benzene in the presence of a pore forming agent and a dispersant to obtain a copolymer white ball, carrying out pore structure purification and carrying out sulfonation. The resin catalyst obtained by the technical scheme is especially suitable for etherification catalytic reaction technological production of polyoxymethylene dimethyl ether. As the swelling pore-broadening process is omitted in the polymerization stage, production efficiency is raised and production cost is lowered. The resin catalyst of the invention has advantages of moderate pore size, uniform distribution, large pore volume and specific surface area, high exchange capacity, high reaction activity and long usage period.

Description

technical field [0001] The present patent application relates to a resin-type catalyst and a preparation method thereof, and in particular, to a catalyst used as a catalyst in an etherification organic catalytic reaction and a preparation method thereof. Background technique [0002] Polymethoxy dimethyl ether (DMMn) is a general term for a class of substances, its abbreviated formula is: CH3O(CH2O)nCH3, where n is an integer ≥ 1, including formaldehyde solution, paraformaldehyde, etc., and the other part is to provide End-capped compounds, such as methanol, dimethyl ether, methylal, etc., when n is 3-8, DMMn has higher oxygen content and higher cetane number, and is an efficient diesel additive, which can significantly improve The combustion condition of diesel in the engine improves thermal efficiency and reduces pollutant emissions. The reason is that the active methyl groups linked with -O-CH2- in its chemical structure generate peroxides in the early stage of combustio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/10C07C41/03C07C43/04C08F212/08C08F212/36C08F2/20C08F8/36C08J9/28
CPCC07C41/03C08F2/20C08F8/36C08F212/08C08J9/28B01J31/10B01J2231/14C08J2325/08B01J35/613B01J35/635B01J35/633B01J35/647C07C43/04C08F212/36
Inventor 吕晓东王义成冷东斌张伟彭慧敏郑英杰何罡吴万春
Owner 丹东明珠特种树脂有限公司
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