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Synthesizing method for pinacolone

A synthesis method and pinazone technology, applied in the field of basic organic synthesis, can solve problems such as waste acid, achieve the effects of low energy consumption, simple production equipment, and shortened production process flow

Inactive Publication Date: 2008-03-26
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 object of the present invention is to provide a kind of synthetic method of pinacolone, solve the problem of a large amount of waste acid and waste aldehyde produced in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh a certain amount of lanthanum nitrate to prepare a solution, add a certain amount of titanium-aluminum composite carrier, soak in equal volume at room temperature for 5 hours, dry in an oven at 110°C for 4 hours, and calcined in a muffle furnace at 580°C for 7 hours to obtain a catalyst A with a lanthanum content of 10%. .

Embodiment 2

[0017] Weigh a certain amount of cerium nitrate to make a solution, add a certain amount of titanium-aluminum composite carrier, soak in equal volume at room temperature for 5 hours, dry in an oven at 110°C for 4 hours, and calcined in a muffle furnace at 580°C for 7 hours to obtain catalyst B with a cerium content of 10%. .

Embodiment 3

[0019] Weigh a certain amount of cerium nitrate and lanthanum nitrate to form a solution, add a certain amount of titanium-aluminum composite carrier, soak in equal volume at room temperature for 5 hours, dry in an oven at 110°C for 4 hours, and calcinate in a muffle furnace at 580°C for 7 hours to obtain a cerium content of 5%. , Catalyst C with 5% lanthanum content.

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PUM

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Abstract

The pinacoline synthesizing process features that in the presence of composite alumina and titania carrier supported RE oxide catalyst, pivalic acid and acetic acid / acetone in the molar ratio of 0.8-1.2 to 0.5-1.5 are reacted at 300-500 deg.c to synthesize pinacoline, with the feeding rate being 0.5-1.0 g / g.hr.

Description

technical field [0001] The invention relates to basic organic synthesis technology, which is a synthesis method of pinacolone. 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 dilute formaldehyde solution are produced in the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/04C07C45/52
Inventor 陈永生孙春晖李佳肖彦刘毅张燕袁慎忠
Owner CHINA NAT OFFSHORE OIL CORP
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