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A kind of selective hydrogenation method of polar polymer

A polar polymer and selective technology, applied in the field of polymers, can solve the problems of high cost, difficult removal and high production cost of ionic liquid, and achieve the effect of good selectivity, easy removal and high hydrogenation activity

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carrier used in this type of catalyst is either difficult to remove from the catalyst system because the particles are too small, or the recycling of the catalyst cannot be realized or reported, or a special preparation method is required to obtain a carrier material that meets the requirements such as particle size and pore size. , the production cost is high, and it does not involve the hydrogenation of other polar polymers
[0004] Patent application CN1229397C discloses a method for hydrogenating polar block copolymers using Group VIII metals as catalysts and ionic liquids as solvents, but this method still has problems such as cumbersome catalyst recovery process and high cost of ionic liquids

Method used

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  • A kind of selective hydrogenation method of polar polymer
  • A kind of selective hydrogenation method of polar polymer
  • A kind of selective hydrogenation method of polar polymer

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preparation example Construction

[0027] For the preparation method of Pd / resin catalyst is not particularly limited, can be the various methods commonly used in this area, for example can comprise: (1) palladium source is dissolved in the first solvent, and in the mixture that obtains, add chelating resin , heating, and then removing the first solvent to obtain a Pd / resin catalyst.

[0028] In the preparation method of Pd / resin catalyst, reduction step (2) may also be included: after step (1), in the presence of a second solvent, the solid product obtained is reduced with a reducing agent, and then the second solvent is removed , to obtain Pd / resin catalyst.

[0029] As previously mentioned, preferably, the chelating resin contains one or more groups in amino, mercapto, carboxyl, ester, hydroxyl, carbonyl, amide and ether groups. Aforesaid chelating resins can be obtained by commercial purchase or self-preparation, in order to further improve the hydrogenation activity of the prepared Pd / resin catalyst, pref...

Embodiment

[0045] The following examples will further illustrate the present invention, but do not limit the present invention. Unless otherwise specified, each method is a conventional method in the art, and each reagent is commercially available.

[0046] In the following examples and comparative examples, the method for determining the degree of hydrogenation is the bromoiodine method (for details, refer to the method for determining the hydrogenation degree of hydrogenated nitrile rubber by the bromoiodide method. Journal of Beijing University of Chemical Technology, 2002, 29 (3), 46-48).

[0047] Benzoyl peroxide (BPO) was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0048] Maleic anhydride (MAH) was purchased from Bailingwei Technology Co., Ltd.

[0049] SBS 1301 was purchased from Beijing Yanshan Branch of China Petrochemical Corporation.

[0050] The styrene-butadiene rubber containing 1% by weight of carboxyl groups was purchased from PetroChina Lanzhou Petrochemical C...

preparation example 1

[0054] Dissolve 100 grams of SBS 1301 in 2.5L of toluene solution, add 8 grams of MAH and 1 gram of BPO to it, and react at 70°C for 3 hours. The product is coagulated and precipitated with acetone. In terms of weight ratio, the polystyrene- The composition of polybutadiene-maleic anhydride is 66.9:28.9:4.2, denoted as S1.

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Abstract

The invention relates to the field of polymers, and discloses a selective hydrogenating method for a polar polymer. The method comprises the following steps: in the presence of an organic solvent, a Pd / resin catalyst and hydrogen, performing hydrogenation reaction on the polar polymer, wherein the Pd / resin catalyst is a heterogeneous catalyst loaded on the resin by Palladium; the resin is chelateresin. The method disclosed by the invention has the characteristics that the hydrogenating activity is high, the selectivity is high, the catalyst is easy to remove, the catalyst can be recycled andused efficiently, and the like.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a selective hydrogenation method for polar polymers. Background technique [0002] In recent years, with the continuous development of automobile manufacturing, metallurgical sealing, aerospace, petroleum industry and other industries, the demand for high-performance polymers has become more and more urgent. Due to their unique properties, all kinds of polar polymers have attracted the attention of the industry. For example, the emergence of epoxidized SBS (styrene-butadiene-styrene block copolymer) has greatly promoted the use of SBS for asphalt modification; the emergence of polar solution-polymerized styrene-butadiene rubber has made white carbon Black can be more uniformly dispersed, which greatly improves the comprehensive performance of rubber products. However, some polymer products containing polar groups still have certain deficiencies in aging resistance, corrosion resistance,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/04C08F287/00C08F222/06C08C19/02B01J31/06
CPCB01J31/06B01J2231/645C08C19/02C08F8/04C08F287/00C08F2800/20C08F2810/50C08F222/06Y02P20/584
Inventor 毕海鹏邵明波佟辉刘天鹤李建成
Owner CHINA PETROLEUM & CHEM CORP
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