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Preparation method of isophorone nitrile

A technology of isophorone nitrile and isophorone, which is applied in the field of synthesizing isophorone nitrile, can solve problems such as increasing energy consumption and procedures, cumbersomeness, and increasing equipment investment, so as to reduce material consumption, solve environmental pollution, The effect of reducing equipment investment

Active Publication Date: 2011-09-28
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] From the point of view of present technology, catalyst is different, and the productive rate of product isophorone nitrile is also different, but all there is the shortcoming that technology itself can't overcome: need to adopt loaded down with trivial details process steps to the catalyst that exists in the product is processed , to separate the product from the catalyst
The sediment will block the equipment pipeline, and it must be stopped regularly for cleaning during the production process, which will seriously affect the normal production
Or increase the filtration process of solid-liquid separation in production, but this increases equipment investment, complicates the production process, and affects production capacity
Although the mode of washing and desalting with water is simpler, it increases wastewater pollution
[0010] Using an organic base as a catalyst must be neutralized or thermally decomposed to remove after the reaction, but this also increases energy consumption and cumbersome procedures
With the increase of aggregates, it is necessary to stop the vehicle for removal, which affects the normal production

Method used

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  • Preparation method of isophorone nitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Put 400ml of strong basic exchange resin IRA-400 (Shanghai Boyao Biotechnology Co., Ltd. agent) into a cylindrical fixed-bed reactor with a length of 800mm and a diameter of 25mm for later use. Turn on the preheater and the heat tracing of the fixed bed jacket, the raw material IP (99%) 558.5g (4.0mol) in the IP storage tank enters the preheater at a speed of 2.0g / min through the metering pump, and the temperature of the preheater is maintained at 180°C, after the IP temperature at the outlet of the preheater reaches 110°C, it enters the fixed bed reactor from the upper feed port of the fixed bed, then starts the liquid hydrocyanic acid metering pump, and 54.6g of liquid hydrocyanic acid in the storage tank ( 99%, 2.0 mol) is injected into the fixed bed reactor from the feeding port at the upper 1 / 5 of the fixed bed at a speed of 0.2 g / min. IP and hydrocyanic acid flow through the fixed bed reactor from top to bottom. The temperature of the fixed bed reactor is control...

Embodiment 2

[0034]Put 400ml of strong basic exchange resin IRA-900 (agent of Shanghai Gongshuo Biotechnology Co., Ltd.) into a cylindrical fixed-bed reactor with a length of 800mm and a diameter of 25mm for subsequent use. Turn on the preheater and the heat tracing of the fixed bed jacket, the raw material IP (99%) 558.5g (4.0mol) in the IP storage tank enters the preheater at a speed of 2.0g / min through the metering pump, and the temperature of the preheater is maintained at 180°C, after the IP temperature at the outlet of the preheater reaches 110°C, it enters the fixed bed reactor from the upper feed port of the fixed bed, then starts the liquid hydrocyanic acid metering pump, and 54.6g of liquid hydrocyanic acid in the storage tank ( 99%, 2.0 mol) is injected into the fixed bed reactor from the feeding port at the upper 1 / 5 of the fixed bed at a speed of 0.3 g / min. IP and hydrocyanic acid flow through the fixed bed reactor from top to bottom. The temperature of the fixed bed reactor ...

Embodiment 3

[0036] Put 400ml of strong basic exchange resin IRA-401 (strong basic type II resin, agent of Shanghai Boyao Biotechnology Co., Ltd.) into a cylindrical fixed-bed reactor with a length of 800 mm and a diameter of 25 mm for standby. Turn on the preheater and the heat tracing of the fixed bed jacket, the raw material IP (99%) 558.5g (4.0mol) in the IP storage tank enters the preheater at a speed of 2.0g / min through the metering pump, and the temperature of the preheater is maintained at 180°C, after the IP temperature at the outlet of the preheater reaches 120°C, it enters the fixed bed reactor from the upper feed port of the fixed bed, then starts the liquid hydrocyanic acid metering pump, and 54.6g of liquid hydrocyanic acid in the storage tank ( 99%, 2.0 mol) is injected into the fixed bed reactor from the feeding port at the upper 1 / 5 of the fixed bed at a speed of 0.25 g / min. IP and hydrocyanic acid flow through the fixed bed reactor from top to bottom. The temperature of ...

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Abstract

The invention provides a preparation method of isophorone nitrile. According to the method, addition reaction between isophorone and hydrocyanic acid is performed to produce isophorone nitrile in the presence of a basic catalyst, wherein the basic catalyst is a basic anion exchange resin. The crude product prepared by the preparation method can be directly purified, the steps of catalyst treatment for separating the product from the catalyst thereby simplifying the preparation process, reducing equipment investment, shortening material process flow and lowering material consumption, and achieving more environmentally-friendly effect.

Description

technical field [0001] The invention relates to a method for synthesizing isophorone nitrile using isophorone and hydrocyanic acid as raw materials, more specifically, a method for preparing isophorone nitrile that can simplify the process by using an alternative catalyst . Background technique [0002] 3-cyano-3,5,5-trimethylcyclohexanone, commonly known as isophorone nitrile (IPN), is an important industrial intermediate, which can be converted into isophorone di Amine (IPDA). IPDA can be used as a curing agent and crosslinking agent for epoxy resin coatings; it can also be used to prepare isophorone diisocyanate (IPDI) in the polyurethane industry, and IPDI is used as a crosslinking agent, coupling agent, hydroxyl stabilizer and Special monomer use. [0003] Existing isophorone nitrile preparation method generally is: make isophorone and hydrocyanic acid carry out addition reaction under the condition of basic catalyst and heating to obtain isophorone nitrile crude pro...

Claims

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Application Information

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IPC IPC(8): C07C253/10C07C255/46
Inventor 谢增勇黎源丛鑫朱发明华卫琦
Owner WANHUA CHEM GRP CO LTD
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