Preparation technology of propylene oxide

A technology for propylene oxide and a preparation process, which is applied in the field of preparation technology of propylene oxide, can solve the problems of difficult to build small and medium-sized devices, high requirements for raw materials, and many varieties of raw materials, and achieves energy saving, high selectivity, and single product. Effect

Active Publication Date: 2011-11-16
山东昌邑海能化学有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is long, the investment is large, there are many types of raw materials, and the requirements for raw materials are high, so it is difficult to build small and medium-sized devices.
At the same time, in the production process, there are many co-products, which are restricted by the market

Method used

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  • Preparation technology of propylene oxide
  • Preparation technology of propylene oxide
  • Preparation technology of propylene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Chloroalcoholization process: chlorine gas, propylene, and industrial water are put into the bottom of the tubular reactor at a mass ratio of 13:30:20, and chloroalcoholization reaction occurs in the tubular reactor to generate an aqueous solution of monochloropropanol;

[0038] (2) Complexation extraction process: the aqueous solution of monochloropropanol is pumped into the top of the extraction tower, and the complexation extraction agent (anisole, toluene, dimethylacetamide, by mass ratio is 1:2:4) Enter from the middle and lower part of the tower, extract monochloropropanol solution by complexation, take out the water phase from the bottom of the tower, and return to the chloroalcoholization process as industrial water;

[0039] (3) Saponification process: pump the monochloropropanol solution extracted by complexation and 10 parts by mass of sodium hydroxide solution into the saponification reactor, heat up to 102°C, and saponification reaction occurs to generat...

Embodiment 2

[0044] Compared with Example 1, chlorine, propylene, and industrial water required for the chloroalcoholization process in the present embodiment are 20:37:31 by mass ratio; trioctylamine, kerosene, and 200# solvent oil are 2:3 by mass ratio : 5; Carrying out the required sodium hydroxide electrolyte mass fraction of saponification reaction is 12 parts, is warming up to 104 ℃; In saponification waste water, sodium chloride content is 13%, is 26% through evaporation concentration heavy saturated sodium chloride content. The rest of the process and equipment used are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0046]Compared with Example 1, the chlorine, propylene, and industrial water required for the chloroalcoholization process in the present embodiment are 29:45:35 by mass ratio; methylene chloride, xylene, and isooctyl alcohol are 3:4 by mass ratio : 6; Carrying out the required sodium hydroxide electrolyte mass fraction of saponification reaction is 15 parts, is warming up to 105 ℃; Sodium chloride content is 23% in the saponification waste water, through evaporative concentration heavy saturation, sodium chloride content is 28% . The rest of the process and equipment used are the same as those in Embodiment 1, and will not be described again.

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Abstract

The invention provides a preparation technology of propylene oxide, belongs to the technical field of production of fine chemical intermediates and particularly relates to a preparation technology of propylene oxide. The preparation technology is characterized by comprising the following steps: feeding chlorine, propylene and industrial water into the bottom of a tubular reactor to perform chlorohydrination reaction, thus generating a chloropropanol solution; pumping the chloropropanol solution into the top of an extraction tower, feeding a complexing extractant from the bottom of the extraction tower to perform complexing extraction, thus obtaining a chloropropanol solution; pumping the obtained chloropropanol solution and a sodium hydroxide solution into a saponification reactor to perform saponification reaction, thus generating propylene oxide; and rectifying crude propylene oxide in a rectifying tower, and acquiring the propylene oxide product from the top of the rectifying tower. On the basis of the traditional chlorohydrination method for producing propylene oxide, the processes such as complexing extraction, separation, evaporation and electrolysis are added in the preparation technology; and an emission-reducing, synergistic, clean and environmentally-friendly preparation technology of propylene oxide can be really realized.

Description

technical field [0001] The invention belongs to the technical field of production of fine chemical intermediates, and in particular relates to a preparation process of propylene oxide. Background technique [0002] With the development of industrial civilization, people's environmental protection awareness and requirements for industrial products and product follow-up are constantly increasing. Propylene oxide (PO) is an important organic chemical product. It is the third largest species after polypropylene and acrylonitrile among the important derivatives of propylene. It is mainly used to produce polyether and propylene glycol. It can also be used as a surfactant. [0003] At present, the production process of producing propylene oxide mainly includes: [0004] 1. Chlorohydrination method [0005] The production process of the chloroalcoholization method is divided into three parts, namely, chloroalcoholization, saponification and refining. [0006] a. Chlorohydrinatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/26C25B1/02C25B1/26
Inventor 蒲伟
Owner 山东昌邑海能化学有限责任公司
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