Preparation method of catalyst used for synthesizing phenylenediamine rubber anti-aging agent

A rubber anti-aging agent and catalyst technology, applied in the field of precious metal catalyst preparation, can solve the problems of strict production operation requirements, unstable catalyst performance, catalyst poisoning, etc., achieve firm adsorption, avoid unstable catalyst performance, and facilitate selection

Active Publication Date: 2019-08-16
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sulfur element is easy to poison the catalyst, the production operation is strict, and t

Method used

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  • Preparation method of catalyst used for synthesizing phenylenediamine rubber anti-aging agent
  • Preparation method of catalyst used for synthesizing phenylenediamine rubber anti-aging agent

Examples

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Embodiment 1

[0025] The catalyst for the synthesis of phenylenediamine rubber anti-aging agent of the present embodiment includes an activated carbon carrier, platinum, iron and nickel loaded on the activated carbon carrier, the mass percentage of platinum in the catalyst is 2%, and the mass percentage of iron 0.1%, the mass percentage of nickel is 0.5%;

[0026] The preparation method of present embodiment catalyst comprises the following steps:

[0027] Step 1. The particle size is 200-400 mesh and the specific surface area is 1000m 2 The gac / g is placed in boiling mass percent concentration in 5% hydrochloric acid aqueous solution for reflux treatment for 1h, then washed to neutral with deionized water, and then dried to obtain gac carrier;

[0028] Step 2, 0.048g FeCl 3 ·6H 2 O, 0.202g NiCl 2 ·6H 2 O and 0.006g PVP (polyvinylpyrrolidone) were dissolved in 50mL deionized water to obtain solution A, and then dehydrated alcohol equal to the volume of solution A was added to solution ...

Embodiment 2

[0033] The catalyst for the synthesis of phenylenediamine rubber anti-aging agent of the present embodiment includes an activated carbon carrier, platinum, iron and nickel loaded on the activated carbon carrier, the mass percentage of platinum in the catalyst is 3%, and the mass percentage of iron is 1%, and the mass percentage of nickel is 1.75%;

[0034] The preparation method of present embodiment catalyst comprises the following steps:

[0035] Step 1. The particle size is 200-400 mesh and the specific surface area is 1200m 2 The gac / g is placed in boiling mass percent concentration in 5% hydrochloric acid aqueous solution for reflux treatment for 1h, then washed to neutral with deionized water, and then dried to obtain gac carrier;

[0036] Step 2, 0.723g Fe(NO 3 ) 3 9H 2 O, 0.867g Ni(NO 3 ) 2 ·6H2 0 and 0.034g CTAB (cetyltrimethylammonium bromide) were dissolved in 50mL deionized water to obtain solution A, and then the dehydrated alcohol equal to the volume of sol...

Embodiment 3

[0041] The catalyst for the synthesis of phenylenediamine rubber anti-aging agent of the present embodiment includes an activated carbon carrier, platinum, iron and nickel loaded on the activated carbon carrier, the mass percentage of platinum in the catalyst is 5%, and the mass percentage of iron is 2%, and the mass percentage of nickel is 3%;

[0042] The preparation method of present embodiment catalyst comprises the following steps:

[0043] Step 1. The particle size is 200-400 mesh and the specific surface area is 1500m 2 The gac / g is placed in boiling mass percent concentration in 15% hydrochloric acid aqueous solution for reflux treatment for 3h, then washed to neutral with deionized water, and then dried to obtain gac carrier;

[0044] Step 2, 0.968g FeCl 3 ·6H 2 O, 1.486g Ni(NO 3 ) 2 ·6H 2 0 and 0.083g SDBS (sodium dodecylbenzenesulfonate) were dissolved in 50mL deionized water to obtain solution A, and then the dehydrated alcohol equal to the volume of solution...

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Abstract

The invention discloses a preparation method of a catalyst used for synthesizing a phenylenediamine rubber anti-aging agent. The catalyst comprises an activated carbon carrier, and platinum, iron andnickel supported on the activated carbon carrier. The preparation method of the catalyst comprises the following steps: step 1, preparing the activated carbon carrier; step 2, preparing a solution containing iron and nickel; step 3, preparing slurry containing nano iron and nickel; step 4, preparing a platinum-containing solution; and step 5, adding hydrazine hydrate into the slurry containing thenano iron and nickel, adding the platinum-containing solution dropwise, performing heat-preservation impregnation, performing cooling, performing filtration, and washing the filter cake to obtain thecatalyst. According to the method provided by the invention, the auxiliary metal nano nickel and iron are preferentially adsorbed by the activated carbon to modify platinum carbon, the nano iron andnickel and the activated carbon carrier are more firmly adsorbed, so that instability of performance of the catalyst caused by loss of the auxiliary metals is avoided, the activity of the catalyst isimproved, and the selectivity and stability of the catalyst are enhanced; and the prepared catalyst can be used for a synthetic reaction of the phenylenediamine rubber anti-aging agent, and the catalyst has high reaction activity, high selectivity and good stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of precious metal catalysts, and in particular relates to a preparation method of a catalyst for synthesizing phenylenediamine rubber antioxidants. Background technique [0002] Rubber antioxidants can be divided into naphthylamines, quinolines, phenols, diamines, and p-phenylenediamines according to their chemical structures. Among them, quinolines and p-phenylenediamines are suitable for tires. Outstanding, and p-phenylenediamine antioxidants are widely used because of their best protective effect. [0003] The catalysts used in the synthesis of phenylenediamine-based rubber antioxidants in industry mainly include supported noble metal catalysts and copper-based catalysts. In the reaction of ordinary supported noble metal catalysts and copper-based catalysts to prepare phenylenediamine rubber antioxidants by hydrogenation reduction alkylation, there are hydrogenation of raw material aliphat...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J35/10C07C211/51C07C209/24
CPCB01J31/28B01J35/0066B01J35/1028C07C209/24C07C211/51
Inventor 闫江梅张鹏王慧李岳锋唐良李凡万克柔曾永康
Owner XIAN CATALYST NEW MATERIALS CO LTD
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