Rosin-disproportionating high activity Pd/C catalyst preparing process

A catalyst and high-activity technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of increasing the cost of users and manufacturers

Inactive Publication Date: 2005-09-28
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although palladium is expensive, due to its simple recovery process and hi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Example 1: Accurately weigh 5Kg of activated carbon, add 50L of distilled water, stir for 3 hours, then add dropwise the prepared palladium acetate solution containing 100g of palladium (the preparation process is to dissolve palladium acetate containing 100g of palladium in 120-200mL of n-butyl amine, then use distilled water to adjust the pH value to 7-8), stir while adding dropwise, and stir for 10 hours after the dropwise addition; remove water and n-butylamine by centrifugation, about 60%; add about 120L of distilled water , first pass nitrogen, then change to hydrogen after 30 minutes for about 7 hours, finally change to nitrogen, and close after 30 minutes; after the catalyst is released and precipitated, the water is removed by suction filtration, and washed 10 times, and then the water is discharged with air to obtain finished catalyst. The evaluation results after being used for the disproportionation reaction of rosin are: the content of abietic acid is 0%, a...

example 2

[0022] Example 2: Accurately weigh 5Kg of activated carbon, add 50L of distilled water, stir for 3 hours, then add dropwise the prepared palladium acetate solution containing 150g of palladium (the preparation process is that palladium acetate containing 100g of palladium is dissolved in 120-200mL of n-butyl amine, then use distilled water to adjust the pH value to 7-8), stir while adding dropwise, and stir for 12 hours after the dropwise addition; remove water and n-butylamine by centrifugal separation, about 55%; add about 125L distilled water , first pass nitrogen, then change to hydrogen after 30 minutes for about 9 hours, finally change to nitrogen, and close after 30 minutes; after the catalyst is released and precipitated, the water is removed by suction filtration, and washed 12 times, and then the water is discharged with air to obtain finished catalyst. The evaluation results after being used for the disproportionation reaction of rosin are: the content of abietic ac...

example 3

[0023] Example 3: Accurately weigh 5Kg of activated carbon, add 50L of distilled water, stir for 3 hours, then add dropwise the prepared palladium acetate solution containing 200g of palladium (the preparation process is that palladium acetate containing 100g of palladium is dissolved in 120-200mL of n-butyl amine, and then use distilled water to adjust the pH value to 7-8), stir while adding dropwise, and stir for 13 hours after the dropwise addition; remove water and n-butylamine by centrifugation, about 55%; add about 130L distilled water , first pass nitrogen, then change to hydrogen after 30 minutes for about 12 hours, finally change to nitrogen, and close after 30 minutes; after the catalyst is released and precipitated, the water is removed by suction filtration, and washed 13 times, and then the water is discharged with air to obtain finished catalyst. The evaluation results after being used in the disproportionation reaction of rosin are: the content of abietic acid i...

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Abstract

The rosin-disproportionating high-activity Pd/C catalyst is prepared through simple and fast wet reduction process with palladium acetate as the precursor compound of active component palladium, active carbon as carrier and n-butylamine as solvent. The prepared catalyst has granularity of 300-350 mesh, and Pd content of 1.5-10 wt%. The catalyst may be used in the rosin disproportionating reaction to produce high quality disproportionated rosin.

Description

technical field [0001] The invention relates to a preparation method of a high-activity Pd / C catalyst, in particular to a preparation method of a high-activity Pd / C catalyst for disproportionation of rosin. Background technique [0002] Palladium carbon catalysts are widely used in the catalytic hydrogenation reaction and catalytic hydrogenation dehalogenation of intermediates such as medicines, pesticides, spices, polymer materials and liquid materials. It is especially used in the catalytic hydrogenation of terephthalic acid and rosin and the disproportionation reaction of rosin. [0003] So far, there are many researches on catalysts for the disproportionation reaction of rosin, and there are many types, which can be roughly divided into non-precious metal catalysts and palladium carbon catalysts. In the research of non-noble metal catalysts, transition metal single substance catalysts (including skeleton nickel catalysts without support), iodine catalysts and sulfide ca...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J37/16C07C5/02
Inventor 顾永万刘小荣郑恩华潘再富沈善问
Owner SINO PLATINUM METALS CO LTD
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