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Synthesis method and application of pinacolone catalyst composite support

A technology of composite carrier and synthesis method, applied in the field of catalysis, can solve problems such as low reaction temperature, and achieve the effects of lowering the reaction temperature, improving the activity and strength of the carrier, and simple production equipment

Inactive Publication Date: 2013-01-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a novel synthesis method and application of a composite carrier of titanium oxide and aluminum oxide. The catalyst prepared by using the carrier loaded rare earth oxide synthesized by this method solves the problem of the current "isoamyl alcohol / isoamylene" method. The problem of a large amount of waste acid and waste aldehyde produced in the process of pinacolone, and the reaction temperature is lowered by 60-100°C, the yield of pinazone is increased from 30% to 50%

Method used

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  • Synthesis method and application of pinacolone catalyst composite support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Take a certain amount of aluminum salt (aluminum sulfate, aluminum nitrate, etc.) and titanium salt (titanium tetrachloride, titanium sulfate, etc.) Neutralize under the condition of value 7-8, wash the filter cake with water until the content of impurity ions is less than 0.1%, then dry the filter cake in an oven at 120°C for 8-12 hours and then crush it to less than 200 mesh, use an appropriate amount of nitric acid as a binder Shaped, extruded into strips of φ2mm, and calcined in a muffle furnace at 500-800°C for 5 hours to obtain the active alumina-titanium oxide composite carrier.

[0011]

Embodiment 2

[0013] Take a certain amount of titanium salt (titanium tetrachloride, titanium sulfate, etc.) The cake is washed with water until the content of impurity ions is less than 0.1%, then the filter cake is dried in an oven at 120°C for 8-12 hours, then crushed to less than 200 mesh, molded with an appropriate amount of nitric acid as a binder, extruded into strips of φ2mm, and placed in a muffle furnace Calcined at 500-800°C for 5 hours to obtain a titanium oxide carrier.

[0014]

Embodiment 3

[0016] Take a certain amount of aluminum salt (aluminum sulfate, aluminum nitrate, etc.) to make a solution, neutralize it with a precipitating agent (sodium hydroxide or sodium carbonate) at 60-70°C, pH 7-8, and wash the filter cake with water Until the content of impurity ions is less than 0.1%, then the filter cake is dried in an oven at 120°C for 8-12 hours, and then crushed to less than 200 meshes, molded with an appropriate amount of nitric acid as a binder, extruded into strips of φ2mm, and placed in a muffle furnace at 500- Calcined at 800°C for 5 hours to obtain activated alumina carrier.

[0017]

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Abstract

The invention discloses a synthesis method and application of a pinacolone catalyst composite support. The synthesis method is characterized by comprising the following steps of: taking 200 g of aluminium nitrate or aluminium sulphate and titanium tetrachloride or titanium sulphate according to a titanium / aluminium molar ratio of 3: 1 to 1: 1, and preparing mixed solution, neutralizing with a precipitator, namely, sodium hydroxide or sodium carbonate, in the conditions that the temperature is 60-70 DEG C and the pH value is 7-8, washing a filter cake until the content of impurity ions is less than 0.1%, drying the filter cake in an oven at 120 DEG C for 8-12 hours, crushing the filter cake until the particle size is less than 200 meshes, using 3-5% dilute nitric acid as an adhesive for forming, extruding the filter cake into strips having a diameter phi of 2 mm, calcining the strips for 5 hours at 500-800 DEG C in a muffle furnace, and then obtaining the pinacolone catalyst composite support of activated aluminium oxide and titanium oxide.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a synthesis method and application of a pinacolone catalyst composite carrier. Background technique [0002] Pinacolone is an important raw material for the synthesis of pesticides and medicines. At present, the production of pinacolone mostly adopts the "isoamyl alcohol / ene" method. In this method, isoamyl alcohol is catalytically dehydrated at high temperature to generate isopentene, and then added with hydrochloric acid to generate p-amyl chloride, and then cyclized with formaldehyde to generate 4,4,5-trimethylhexacyclo-1,3, and finally Catalyzed ring-opening dealdehyde rearrangement isomerization to generate pinacolone. This process is widely used at present, with many reaction steps, high temperature, strict operation requirements, difficult control of reaction conditions, large investment in equipment, serious corrosion, a large amount of dilute hydrochloric acid and di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/06B01J23/10C07C49/04C07C45/00
Inventor 陈永生于海斌孙春晖刘伟许岩刘冬冬
Owner CHINA NAT OFFSHORE OIL CORP
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