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Catalyst for C12-C12 fat carboxylic acid ketonization and its application

A technology of aliphatic carboxylic acid ketones and catalysts, which is applied in the field of C2-C12 aliphatic carboxylic acid ketonization catalysts and its preparation, can solve the problems of carbon deposition, short service life of catalysts, high energy consumption and high material consumption, and achieve lower reaction temperature, anti- Strong carbon deposition ability, prolonging life effect

Active Publication Date: 2006-05-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of high ketosis reaction temperature of acid-acid synthesis of aliphatic ketones, serious carbon deposits, short service life of the catalyst, and high energy and material consumption. A new catalyst has been invented and applied It is used in the ketonization reaction of aliphatic ketones to reduce the temperature of the ketone reaction, improve the anti-coking ability of the catalyst, and prolong the service life of the catalyst

Method used

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  • Catalyst for C12-C12 fat carboxylic acid ketonization and its application
  • Catalyst for C12-C12 fat carboxylic acid ketonization and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of carrier: in an acid-resistant container, add distilled water and 75% (mass percentage) nitric acid solution (nitric acid, intermediate product of Jilin Petrochemical Fertilizer Factory, hereinafter the same) successively, prepare 1000ml of 18-20% dilute nitric acid solution, Add 800g of γ-alumina (aluminum oxide, product of Tianjin Chemical Research and Design Institute, the same below) to the above-mentioned dilute nitric acid solution, continuously and gently stir for 10 hours, separate alumina and dilute nitric acid solution, and oxidize The aluminum is placed in an acid-resistant pan, dried at 115°C for 6 hours, calcined at 500°C for 4 hours, and cooled naturally to obtain carrier A.

[0049] (2) Preparation of impregnation solution: in an acid-resistant container, add 99.5% neodymium oxide (neodymium oxide, product of Gansu Rare Earth Co., Ltd., the same below) 100 g and 100 ml of distilled water successively, stir to make a slurry, and then Slow...

Embodiment 2

[0052] (1) Preparation of carrier: Dry 200g of gamma-activated alumina (aluminum oxide, product of Tianjin Research and Design Institute of Chemical Industry, the same below) for 6 hours (drying temperature is 115°C), and roast for 4 hours at 750°C , natural cooling, prepared carrier B.

[0053] (2) Preparation of impregnating solution: in an acid-resistant container, successively add 200 g of 99.5% neodymium oxide (neodymium oxide, the product of Gansu Rare Earth Co., Ltd., the same below) and 200 ml of distilled water, stir to make a slurry, and then Slowly add 75% (mass percentage) of nitric acid solution (nitric acid, an intermediate product of Jilin Petrochemical Fertilizer Factory, the same below), keep stirring, control the reaction temperature to be less than 65°C, until the neodymium oxide is completely dissolved, control the pH to 3.1, then add distilled water to 800ml to prepare neodymium nitrate solution. In an acid-resistant container, add 200 g of praseodymium o...

Embodiment 3

[0056] Carrier preparation: Prepare 200 g of carrier C according to the carrier B preparation method.

[0057] (2) Preparation of impregnating solution: in an acid-proof container, successively add 99.5% neodymium oxide (neodymium oxide, product of Gansu Rare Earth Co., Ltd., the same below) 100 g of distilled water and 100 ml of distilled water, stir to make a slurry, and then Slowly add 63% (mass percentage) of nitric acid solution (nitric acid, an intermediate product of Jilin Petrochemical Fertilizer Factory, the same below), keep stirring, control the reaction temperature to be less than 65°C, until the neodymium oxide is completely dissolved, control the pH to 3.0, then add distilled water to 500ml to prepare neodymium nitrate solution. Use 99.5% cerium nitrate (cerium nitrate, the product of Baotou Rare Earth No. 3 Factory, hereinafter the same) and distilled water to configure every 500ml cerium nitrate solution containing 100g cerium oxide. Mix the prepared neodymium...

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Abstract

The invention provides a C2-C12 aliphatic carboxylic acid ketone activator. The invention uses ª†-aluminum oxide as carrier and the single, double elements, and ternary elements of lanthanum, cerium, praseodymium and neodymium of light lanthanide series rare earth as active components. While the activating carrier method comprises (1) the heat treatment process while the treatment temperature is 480-800 Deg. C; (2) azotic acid aqueous solution method while the concentration of azotic acid aqueous solution is 5-45%; (3) evacuation method. In addition, the activator is prepared via the immersion method while it can be used to C2-C12 aliphatic carboxylic acid ketone.

Description

technical field [0001] The present invention relates to a kind of fatty carboxylic acid ketonization catalyst, preparation method and application thereof, especially a kind of C 2 -C 12 Fatty carboxylic acid ketonization catalyst and its preparation method and application. . Background technique [0002] The acid-acid method is one of the important methods for the preparation of aliphatic ketones under high temperature conditions. The catalyst used in the acid-acid method is a carrier-supported metal oxide. [0003] EP0085996 uses a rare earth metal / alumina catalyst to synthesize an asymmetric aliphatic ketone, the active components are binary oxides of neodymium and praseodymium, and the carrier is not treated in any way. Because of its low activity, the method of recycling symmetrical ketones is adopted to improve the selectivity of unsymmetrical ketones; after absorbing the product with methanol, the mass percentage of methyl isopropyl ketone in the recycled product i...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J23/10B01J37/02B01J37/06C07C45/41C07C49/04
Inventor 邓广金李正崔龙刘季侯立波赵胤
Owner PETROCHINA CO LTD
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