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Preparation method of Pd/resin catalyst

A catalyst and resin technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, catalyst carrier, etc., can solve the problems of low utilization rate of palladium, waste of precious metal palladium, etc., to extend the operation period, reduce corrosion, and loss phenomenon Reduced effect

Active Publication Date: 2009-01-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Simply using acidic medium, the H in the exchange solution + When the concentration is appropriate, the competitive adsorption state in the ion exchange process can be changed to a certain extent, but the problem of low utilization of palladium cannot be solved only by adding acid, resulting in waste of precious metal palladium
In addition, the activity and selectivity of the catalyst obtained by this method still need to be further improved.

Method used

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  • Preparation method of Pd/resin catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a) Heat treatment of hydrogen resin

[0023] Hydrogen-type strong acid temperature-resistant styrene-based cation exchange resin, the physical properties are as follows: moisture content 49wt%, specific surface area 15m 2 / g, the average pore diameter is 10.5nm, the wet basis exchange capacity is 4.3mol / g, and the wet apparent density is 0.75g / ml. Measure 200ml of the above resin (wet basis), add 300ml of distilled water, put them together in a 1000ml autoclave, heat to 150°C, keep the temperature constant for 4 hours, then filter and wash until neutral.

[0024] b) Ion exchange palladium

[0025] Immerse 200ml of the resin obtained in step a into 400ml of an exchange solution containing 0.228g of palladium, 0.8g / 100ml of nitric acid, and 0.5g / 100ml of hydrogen peroxide, and stir for 2.0 hours at the same time, filter out the resin, wash it with distilled water until neutral, and obtain the finished catalyst WB-1.

Embodiment 2

[0027] Same as Example 1, the difference is that the palladium in the 400ml exchange solution in step b is 0.363g, the nitric acid content is 1.2g / 100ml, and the hydrogen peroxide content is 1.2g / 100ml to obtain catalyst WB-2.

Embodiment 3

[0029] With embodiment 1, difference is that palladium is 0.456g in the 400ml exchange liquid in step b, nitric acid 1.8g / 100ml, hypochlorous acid 1.5g / 100ml, obtains catalyst WB-3.

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Abstract

A Pd / resin catalyst for preparing methylisabutyl ketone from acetone with high activity and stability and long service life is prepared through preparing the Pd-contained exchange liquid, adding oxidant, heat treating, immersing resin in it for ion exchange, filtering and washing.

Description

1. Technical field [0001] The invention relates to a method for preparing a catalyst for synthesizing methyl isobutyl ketone from acetone, in particular to a method for preparing a catalyst for synthesizing methyl isobutyl ketone in one step from acetone and hydrogen. 2. Background technology [0002] Methyl isobutyl ketone (MIBK for short) is an important organic solvent, mainly used in paint, resin coating, waxy oil dewaxing, and also one of the raw materials for the production of rubber antioxidant 4020, with a wide range of uses. [0003] The traditional production method is a three-step method, which has problems such as polluting the environment, high production costs, and complicated processes, and has been gradually eliminated. The one-step method is the most advanced technology for synthesizing methyl isobutyl ketone from acetone (abbreviated as AC), which requires the catalyst to have dual functions, namely condensation dehydration and hydrogenation. [0004] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/30B01J23/44B01J32/00C07C45/45C07C49/04
Inventor 宋丽芝艾抚宾王海波勾连科王春梅
Owner CHINA PETROLEUM & CHEM CORP