Unlock instant, AI-driven research and patent intelligence for your innovation.

Technology for purifying epoxypropane

A propylene oxide and process technology, which is applied in the field of propylene oxide purification process, can solve the problems of long residence time, low liquid holding capacity of fillers, increased equipment investment, etc., and achieves simple equipment form, low equipment investment, and easy guarantee of residence time Effect

Inactive Publication Date: 2014-06-18
JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the rectification of propylene oxide uses a high-efficiency packed tower to obtain the required number of theoretical plates, and the liquid holding capacity of the packing is low, this is in contradiction with the long residence time required for deep dealdehydelization. In order to achieve the required reaction residence time, It is necessary to design the packing layer of the rectification tower very high, which will inevitably greatly increase the equipment investment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take the above-mentioned crude propylene oxide solution (see Table 1-1 for the specific composition) and mix it with 0.13kg of 20wt% (weight) sodium hydroxide aqueous solution and 0.065kg of 50wt% hydrazine hydrate, and pour it into a container with jacketed heating measures Neutralize and seal, heat and maintain the temperature at 60°C, and after 10 minutes, pass cooling water through the jacket to reduce the material in the container to normal temperature, and take samples for gas chromatography to analyze the composition of the material. The result is as follows:

[0019] Table 1-2 Analysis results of reaction products

[0020] name

Embodiment 2

[0022] Take the above-mentioned crude propylene oxide solution (see Table 1-1 for the specific composition) and mix it with 0.25kg of 20wt% (weight) sodium hydroxide aqueous solution and 0.075kg of 50wt% hydrazine hydrate, and pour it into a container with jacketed heating measures Neutralize and seal, heat and maintain the temperature at 65°C, and after 10 minutes, pass cooling water through the jacket to reduce the material in the container to normal temperature, and take samples for gas chromatography to analyze the composition of the material. The result is as follows:

[0023] Table 1-3 Analysis results of reaction products

[0024] name

Embodiment 3

[0026] Take the above-mentioned crude propylene oxide solution (see Table 1-1 for the specific composition) and mix it with 0.25kg of 20wt% (weight) sodium hydroxide aqueous solution and 0.075kg of 50wt% hydrazine hydrate, and pour it into a container with jacketed heating measures Neutralize and seal, heat and maintain the temperature at 70°C, and after 10 minutes, pass cooling water through the jacket to reduce the material in the container to normal temperature, and take samples for gas chromatography to analyze the composition of the material. The result is as follows:

[0027] Table 1-4 Analysis results of reaction products

[0028] name

[0029] Methyl formate

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a technology for purifying epoxypropane. The technology comprises steps of firstly mixing an epoxypropane solution, a sodium hydroxide water solution and hydrazine hydrate in a pipeline so as to obtain a mixed material; and then reacting the mixed material in a vessel connected with the pipeline. The technology uses simple equipment, through which a quantitative sodium hydroxide water solution and hydrazine hydrate are uniformly mixed with an initial epoxypropane solution without using extra stirring tools, the reaction process can be realized through a middle tank or a feeding buffer tank of the equipment, the equipment can ensure the staying time easily, allows continuous operation or intermittent operation, and is low in investment.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a process for purifying propylene oxide. Background technique [0002] The preparation of propylene oxide by propylene hydrogen peroxide method has the characteristics of simple process, single product, environmental friendliness, high utilization rate of atom economy, etc., and is considered to be the development direction of propylene oxide synthesis technology. Propylene is oxidized to propylene oxide by hydrogen peroxide under the action of a catalyst, and a small amount of propylene undergoes a side reaction to convert to aldehyde (mainly acetaldehyde). Although the aldehyde content in the reaction product is very low, it is difficult to use with propylene oxide Removal by conventional rectification methods will eventually enter the propylene oxide product, resulting in a decline in product quality and affecting device efficiency. Therefore, how to simply and efficiently re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/32
CPCC07D303/04C07D301/32
Inventor 刘学线田柏森李迎辉郭晓宇金萍王跃祝涛刘锦旗魏斯钊
Owner JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG