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Catalyst for continuous production of p-methoxycyclohexanone, preparation method and application thereof

A technology of methoxycyclohexanone and catalyst, which is applied to the catalyst for continuous production of p-methoxycyclohexanone and the field of preparation thereof, can solve the problems of complicated process, cumbersome operation, large workload and the like, and achieves simple operation and raw material. High-conversion, easy-to-control effects

Active Publication Date: 2021-12-07
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the tank-type catalytic hydrogenation method has good product selectivity, the tank-type catalytic hydrogenation method is a batch operation, the process is complicated, the operation is cumbersome, and the workload is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. a kind of catalyzer of continuous production p-methoxycyclohexanone, described catalyzer comprises carrier, and the Lewis acid and active noble metal loaded on the described carrier, described active noble metal is Pd and Pt, according to 100%, The mass percentage composition of Pd in ​​the described catalyst is 0.4%, the mass percentage composition of Pt is 0.1%, the mass percentage composition of Lewis acid is 0.08%, and all the other are carrier, and described carrier is coconut shell class columnar activated carbon carrier, Its diameter is 1.5-2.2mm, length is 2-4mm, specific surface area is 1000-1200m 2 / g, pore volume 0.85-0.95cm 3 / g; the Lewis acid is AlCl 3 ;

[0034] 2. the preparation method of described catalyst, comprises the following steps:

[0035](1) The carrier is pretreated with 5wt% hydrogen peroxide solution, specifically: soaking at 50°C for 3 hours, then washing with water until pH > 5, and drying at 100°C;

[0036] (2) Dissolve the Lewis a...

Embodiment 2

[0041] Lewis acid with an equal mass of CeCl 3 Instead, the others are the same as in Example 1, the preparation method is the same as in Example 1, and the obtained catalyst is denoted as S2.

Embodiment 3

[0043] Lewis acid with equal mass of ZnCl 2 Instead, the others are the same as in Example 1, the preparation method is the same as in Example 1, and the obtained catalyst is denoted as S3.

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PUM

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Abstract

The invention discloses a catalyst for continuous production of p-methoxycyclohexanone. The catalyst includes a carrier, a Lewis acid and an active noble metal loaded on the carrier, and the active noble metal is Pd and Pt, calculated by 100%. , the mass percentage of Pd in ​​the catalyst is 0.3-0.7%, the mass percentage of Pt is 0.08-0.3%, the mass percentage of Lewis acid is 0.05-0.2%, and the rest are carriers, and the carrier is A columnar activated carbon carrier; at the same time, the invention also discloses the preparation method of the catalyst and the application of the catalyst in producing p-methoxycyclohexanone. The catalyst has good activity, high selectivity and long service life, can efficiently and continuously prepare p-methoxycyclohexanone, the molar conversion rate of raw materials is greater than 99%, and the selectivity of product p-methoxycyclohexanone is greater than 88.5%.

Description

technical field [0001] The invention belongs to the technical field of producing p-methoxycyclohexanone, in particular to a catalyst for continuous production of p-methoxycyclohexanone, its preparation method and application. Background technique [0002] P-methoxycyclohexanone is an important intermediate for the synthesis of the pesticide spirotetramat. Spirotetramat is a quaternary ketone compound with unique action characteristics. So far, it is the only modern insecticide with two-way systemic conductivity. It has broad application prospects, and it is necessary to vigorously develop and explore its synthetic process route. As an indispensable intermediate in the synthetic route of spirotetramat, p-methoxycyclohexanone, it is also necessary to explore and develop its preparation method. [0003] The synthesis methods of p-methoxycyclohexanone mainly include traditional synthesis method, cyclohexanol oxidation method and p-methoxyphenol catalytic hydrogenation method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/125B01J27/10B01J27/138B01J27/135C07C45/00C07C49/517
CPCB01J27/10B01J27/125B01J27/135B01J27/138C07C45/006C07C2601/14C07C49/517
Inventor 高明明程杰林涛万克柔张炳亮张力赵卓然
Owner XIAN CATALYST NEW MATERIALS CO LTD
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