Process for modifying catalysts and the use of the catalysts

A catalyst and modification technology, which is applied in the direction of Reine catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unsatisfactory effects and additional costs

Inactive Publication Date: 2008-01-09
GOLDSCHMIDT CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, they did not use other elements for catalyst promotion, did not use a fixed bed format, and had high ppm levels of Ni in the treatment solution during their process, resulting in the waste stream being treated and / or processed resulting in undesired effects and additional costs

Method used

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  • Process for modifying catalysts and the use of the catalysts
  • Process for modifying catalysts and the use of the catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0172] Example 1: Treatment of Raney-type Ni catalyst with formaldehyde

[0173] A commercially available Raney-type nickel catalyst having an average particle size of about 53 μm was treated with different levels of formaldehyde according to the method described herein.

[0174] The desired amount of catalyst is suspended in an aqueous solution containing formaldehyde. The suspension was stirred at room temperature under air or nitrogen for 1 hour.

[0175] After the treatment, the catalyst settled, the overstanding aqueous solution was decanted, and the catalyst was washed three times with distilled water. Table 1 details the specific conditions used to prepare each catalyst.

[0176] Table 1: Formaldehyde treatment conditions of Raney-type Ni catalyst

[0177] Catalyst N °

[0178] RT = room temperature

Embodiment 2

[0179]Example 2: Treatment of Raney-type Ni catalyst containing Mo in its precursor alloy with formaldehyde

[0180] 27.7 g (dry basis) of the catalyst containing Mo in its precursor alloy was suspended in 121 ml of an aqueous solution containing formaldehyde. The suspension was stirred in air at room temperature for 1 hour. After the treatment, the catalyst settled, the upper aqueous solution was decanted, and the catalyst was washed three times with 400 ml of distilled water. Table 2 details the specific conditions used to prepare each catalyst.

[0181] Table 2: Formaldehyde treatment conditions for Raney-type Ni catalyst containing Mo in its precursor alloy

[0182] Catalyst N °

[0183] RT = room temperature

Embodiment 3

[0184] Example 3: Treatment of Raney-type Ni catalyst with sodium formate

[0185] 32.35 g (dry basis) of Raney-type Ni catalyst with an average particle size of about 53 μm was suspended in 141 ml of an aqueous solution containing sodium formate. The suspension was stirred in air at 25°C or 90°C for 1 hour. After the modification, as the catalyst settles to the bottom of the container, the treated suspension is cooled (as required), the upper aqueous solution is decanted, and the catalyst is washed three times with distilled water. Table 3 details the specific conditions used to prepare these catalysts.

[0186] Table 3: Conditions for the treatment of Raney-type Ni catalyst with sodium formate

[0187] Catalyst N °

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Abstract

The present invention relates to a process for modifying catalysts via the deposition of carbon containing residues in the presence of one or more solvents, where the gas phase over the catalyst treatment solution during the treatment is air or an inert gas, and / or the liquid phase contains a templating agent and / or base. The modified catalyst can be used for stereo-, chemo- and regio selective transformations of organic compounds.

Description

Technical field [0001] The invention relates to a method for modifying a catalyst and the use of the catalyst. Background technique [0002] Stereoselectivity involves the conversion of organic molecules into photoactive molecules due to the introduction of one or more chiral centers in the molecule. [0003] An example of a stereoselective reaction is the controlled addition of two hydrogen atoms to unsaturated prochiral compounds such as olefins, imines, carbonyls, carboxylic acids, esters, anhydrides, oximes, sulfoxides, or any other prochiral compounds One side or the other side of a sexual organic double bond to create at least one chiral center. [0004] For example, the hydrogenation of fructose can produce mannitol or sorbitol, depending on which substance mutagenized by the ketose is preferably adsorbed to the surface and hydrogenated. [0005] Chemoselectivity relates to the more preferred conversion of one type of moiety over the other one or more moieties. This prefer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04B01J31/02B01J25/00B01J23/72B01J23/755B01J23/75B22F1/102B22F1/145B22F1/16
CPCB01J2531/847C07C209/48B01J2231/643B22F1/02C07C253/30B01J31/04C07H3/10C07H3/02B01J31/0212B22F1/0088B22F1/145B22F1/16B22F1/102C07C211/03C07C211/12C07C211/27C07C255/24
Inventor D·奥斯特加德V·杜普雷R·奥林多S·勒德M·贝尔魏勒
Owner GOLDSCHMIDT CHEM CORP
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