Improved preparation method of dehydrogenation catalyst containing platinum, tin and aluminum

A dehydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the loss of active components and the reduction of conversion rate of dehydrogenation reaction , Catalyst support layer falling off and other problems, to reduce catalyst wear and damage, reduce the effect of falling off

Pending Publication Date: 2022-04-15
江苏金桐表面活性剂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, since alkane dehydrogenation requires a high temperature environment close to 600°C, the relative friction between the pellets during the dehydrogenation reaction and the natural impact of the

Method used

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  • Improved preparation method of dehydrogenation catalyst containing platinum, tin and aluminum
  • Improved preparation method of dehydrogenation catalyst containing platinum, tin and aluminum
  • Improved preparation method of dehydrogenation catalyst containing platinum, tin and aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 10g of pseudo-boehmite powder, add deionized water to prepare pseudo-boehmite: an aqueous solution with a water mass ratio of 6:100, stir at room temperature for 30min, and drop it into the stirring solution at a uniform speed 12 g of nitric acid aqueous solution with a mass fraction of 35% was added dropwise in the state, and after the nitric acid aqueous solution was added dropwise, the stirring was continued for 2 h to form the required solution. Dilution, the solution system is unstable, and it is difficult to maintain the colloidal state. It is found that after standing for 30 minutes, the solution settles into upper and lower layers, and the solution supernatant is used in step (2) to impregnate the catalyst.

[0027] (2) Take two fresh catalysts of 30g each, put them into the supernatant prepared in step (1) and soak them for 1min and 10min respectively, take them out and drain them, and then put them in a dry, dust-free and organic-volatile-free environ...

Embodiment 2

[0036] (1) Weigh 5g of pseudo-boehmite powder, add deionized water to prepare pseudo-boehmite: an aqueous solution with a water mass ratio of 4:100, stir at room temperature for 30min, and drop it into the stirring solution at a uniform speed State dripping mass fraction is 35% nitric acid aqueous solution 9g, after the nitric acid aqueous solution dropwise is finished, continue to stir 2h, be made into required solution, find that after standing for 30min, the solution settles into upper and lower two layers, takes the solution supernatant for Step (2) impregnating the catalyst.

[0037] (2) Get 30g of fresh catalyst, put it into the supernatant prepared in step (1) and soak for 1min, pull it out and drain it, then put it in a dry, dust-free environment without organic volatile gas and dry it in the shade for 24h at normal temperature, and then Drying at 120°C for 3 hours, and calcining at 500°C for 4 hours to obtain the anti-wear catalyst under the treatment conditions.

[...

Embodiment 3

[0046] (1) Take 5g of pseudo-boehmite powder, add deionized water to be mixed with pseudo-boehmite: an aqueous solution with a water mass ratio of 3:100, stir at room temperature for 30min, and drop it into the stirring solution at a uniform speed Add the aqueous solution of nitric acid with a mass fraction of 35% in the state dropwise. After the addition of the aqueous solution of nitric acid, continue to stir for 2 hours to make the required solution. After standing for 30 minutes, the solution settles into upper and lower layers. Take the solution supernatant for the step (2) Impregnated catalyst.

[0047] (2) Get 30g of fresh catalyst, put it into the supernatant prepared in step (1) and soak for 1min, pull it out and drain it, then put it in a dry, dust-free environment without organic volatile gas and dry it in the shade for 24h at normal temperature, and then Drying at 120°C for 3 hours, and calcining at 500°C for 4 hours to obtain the anti-wear catalyst under the treat...

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Abstract

The invention provides an improved preparation method of a dehydrogenation catalyst containing platinum, tin and aluminum, which is characterized by comprising the following steps of: uniformly stirring and mixing a pseudo-boehmite aqueous solution and a nitric acid aqueous solution according to a certain proportion, standing and layering the solution, and dipping, drying in the shade, drying and roasting a long-chain alkane catalyst by taking the supernate of the solution to obtain an anti-wear catalyst; according to the treatment method, the loss of noble metal elements on the outer layer of the catalyst is reduced, the original dehydrogenation performance of the catalyst is maintained and improved, and the olefin yield is ensured.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to an improved preparation method of a platinum-tin-aluminum-containing dehydrogenation catalyst. The International Patent Classification belongs to C07B. Background technique [0002] The dehydrogenation reaction of long-chain alkanes is to use light wax oil composed of C10-C13 normal alkanes to generate normal alkenes corresponding to each carbon number, and then the downstream production line uses the dehydrogenated product alkenes as raw materials to produce alkyl by alkylation reaction Benzene, and finally alkylbenzene is sulfonated to produce alkylbenzene sulfonate. The dehydrogenation technology of long-chain alkanes is now mature. Although the recovery rate of precious metal elements loaded on the outer layer of the catalyst is as high as 90%, there are still some The precious metal component falls off and loses during the catalyst transportation, and cannot p...

Claims

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Application Information

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IPC IPC(8): B01J23/62C07C5/333C07C11/02
Inventor 宋春敏张硕王延臻张孝平叶志良胡鹏程林松段红玲张桁锴张庆宜张安
Owner 江苏金桐表面活性剂有限公司
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