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Palladium-carbon catalyst for preparing disproportionated rosin as well as preparation method and application of palladium-carbon catalyst

A palladium-carbon catalyst, palladium-carbon catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of reduced catalytic activity of activated carbon and dispersion of active components It can achieve the effect of reducing NO2 emission, high catalytic activity and fast speed.

Pending Publication Date: 2021-10-22
谷育英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methods for preparing palladium-carbon catalysts are different, such as the dispersibility of activated carbon is different, and its activity is also different, and activated carbon also has the following problems in existing palladium-carbon catalysts: (1) activated carbon has high ash content, contains heavy metals and is difficult to remove
(2) The high dispersion of active components reduces the number of active centers per unit surface area of ​​activated carbon and reduces the catalytic activity of activated carbon.

Method used

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  • Palladium-carbon catalyst for preparing disproportionated rosin as well as preparation method and application of palladium-carbon catalyst
  • Palladium-carbon catalyst for preparing disproportionated rosin as well as preparation method and application of palladium-carbon catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of palladium carbon catalyst for the production of disproportionated rosin comprises the steps:

[0051] S1, the coconut shell activated carbon is put into a frame vibrating sieve (250-300 mesh) for screening;

[0052] S2. Add 40kg of coconut shell activated carbon sieved in step S1 to the reactor, then add 400L of deionized water to repeatedly boil and wash, discard the supernatant after washing, and then add 10L of 10% H 2 o 2, when the temperature was raised to 60°C, 5L of 30% sodium chlorate solution was added dropwise for 5 hours. After the dropwise addition, stop the reaction and wash with deionized water to neutrality;

[0053] S3, 2kg PdCl 2 Add it to the reaction kettle, then add 50L deionized water and 5L HCl solution with a concentration of 36% to dissolve, and then react at 90°C for 3h to make PdCl 2 Dissolve and transform into chloropalladium acid solution;

[0054] S4, add deionized water to the chloropalladium acid solution pre...

Embodiment 2

[0058] The preparation method of palladium carbon catalyst for the production of disproportionated rosin comprises the steps:

[0059] S1, the coconut shell activated carbon is inserted into a frame vibrating sieve (250-300 mesh) for screening;

[0060] S2, transfer 45kg of coconut shell activated carbon sieved in step S1 to the reactor, then add 450L of deionized water to repeatedly boil and wash, discard the supernatant after washing, and then add 11L of 10% H 2 o 2 , when the temperature was raised to 70°C, 5.6L of 35% sodium chlorate solution was added dropwise for 5 hours. After the dropwise addition, stop the reaction and wash with deionized water to neutrality;

[0061] S3, 2.2kg PdCl 2 Add it into the reaction kettle, then add 60L deionized water and 5.5L HCl solution with a concentration of 36% for dissolution, and then react at 90°C for 3h to dissolve the palladium chloride and convert it into a chloropalladium acid solution;

[0062] S4, add deionized water to t...

Embodiment 3

[0066] The preparation method of palladium carbon catalyst for the production of disproportionated rosin comprises the steps:

[0067] S1, the coconut shell activated carbon is inserted into a frame vibrating sieve (250-300 mesh) for screening;

[0068] S2, transfer 50kg of sieved coconut shell activated carbon to the reaction kettle, then add 400L deionized water to boil and wash repeatedly, discard the supernatant after washing, then add 400L deionized water and 15L concentration of 15% H 2 o 2 , when the temperature was raised to 75°C, 12.5 L of 40% sodium chlorate solution was added dropwise for 5 hours. After the dropwise addition, stop the reaction and wash with deionized water to neutrality;

[0069] S3, 2.4kg PdCl 2 Transfer to the reaction kettle, then add 70L of deionized water and 7L of 36% HCl solution for dissolution, and then react at 90°C for 4h to dissolve the palladium chloride and convert it into a chloropalladium acid solution;

[0070] S4, add deionized...

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Abstract

The invention discloses a palladium-carbon catalyst for preparing disproportionated rosin and a preparation method and application of the palladium-carbon catalyst, firstly, activated carbon is oxidized by hydrogen peroxide and sodium chlorate to enable the activated carbon to have fewer micropores and developed mesopores, and then ammonia water and hydrazine hydrate are adopted for reduction to prepare the high-purity palladium-carbon catalyst. The disproportionated rosin produced under catalysis of the prepared palladium-carbon catalyst can reach the national primary standard, and the palladium-carbon catalyst can be continuously and repeatedly used.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a palladium-carbon catalyst for preparing disproportionated rosin, a preparation method and application thereof. Background technique [0002] Palladium-carbon catalysts are widely used in petrochemical fields, such as the preparation of styrene-butadiene rubber polymer emulsifier-disproportionated rosin in the automobile tire industry. Skeleton nickel catalysts, iodine catalysts and sulfide catalysts without supports can also be used. However, when the above-mentioned catalysts are used in the disproportionation reaction of rosin, they have problems such as low activity, large amount of transition metal, long reaction time, and high reaction temperature, which limit their application and development in the production process of disproportionated rosin. [0003] At present, palladium-carbon catalysts are mainly used in the preparation of disproportionated rosin at home and abroa...

Claims

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Application Information

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IPC IPC(8): B01J23/44C09F1/04
CPCB01J23/44C09F1/04
Inventor 谷育英魏鸿林葛敬云于海张小工杨柏平
Owner 谷育英
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