Process for continuously producing diethanolamine by using selective catalyst

A diethanolamine and catalyst technology, which is applied in the field of diethanolamine production technology, can solve the problems of high energy consumption and raw material consumption, poor product quality, long production cycle, etc., and achieve the effects of saving raw materials, reducing energy consumption, and reducing production processes

Inactive Publication Date: 2011-01-19
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process has long production cycle, high consumption of energy and raw materials, poor product quality and high cost

Method used

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  • Process for continuously producing diethanolamine by using selective catalyst
  • Process for continuously producing diethanolamine by using selective catalyst
  • Process for continuously producing diethanolamine by using selective catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Select ZSM-5 zeolite molecular sieve, configure a supersaturated impregnating solution containing boric acid of 5% by weight of ZSM-5, after impregnating for 24 hours, suction filter, mother liquor for standby, after drying the filter cake for 12 hours, roasting at 550°C for 3 hours, and then use The remaining mother liquor was soaked, dried and roasted repeatedly, and the above steps were repeated 3 to 5 times to obtain B 2 o 3 / ZSM-5 catalyst, see figure 1 . Will B 2 o 3 / ZSM-5 catalyst is loaded into a fixed bed reactor after molding. Anhydrous liquid ammonia and ethylene oxide are fed into the fixed-bed reactor by two metering pumps at a ratio of 10:3, and the reaction pressure is controlled at 1.0-5.0MPa, the temperature is 40-160°C, and the volume space velocity is 1.0 ~3.0h -1 . The analysis result of the reactant after deamination treatment is: MEA:DEA:TEA=35:55:10.

Embodiment 2

[0037]Select ZSM-5 zeolite molecular sieve, configure a supersaturated impregnating solution containing zinc nitrate of 3% by weight of ZSM-5, after impregnating for 24 hours, suction filter, mother liquor for standby, after drying the filter cake for 12 hours, roasting at 550°C for 3 hours, and then Repeat impregnation, drying and roasting with the remaining mother liquor, and repeat the above steps 3 to 5 times to obtain a ZnO / H-ZSM-5 catalyst, which is shaped and loaded into a fixed-bed reactor. Anhydrous liquid ammonia and ethylene oxide are fed into the fixed-bed reactor by two metering pumps at a ratio of 10:3, and the reaction pressure is controlled at 1.0-5.0MPa, the temperature is 40-160°C, and the volume space velocity is 1.0 ~3.0h -1 . The analysis result of the reactant after deamination treatment is: MEA:DEA:TEA=26:58:16.

Embodiment 3

[0039] Select β zeolite molecular sieve, prepare a supersaturated impregnating solution containing boric acid of 8% by weight of β zeolite molecular sieve, after 24 hours of immersion, suction filter, mother liquor for standby, after drying the filter cake for 12 hours, roast at 550°C for 3 hours, and then use the remaining mother liquor Repeat dipping, drying, roasting, repeat the above steps 3 to 5 times to obtain B 2 o 3 / beta catalyst, see figure 2 . Will B 2 o 3 The / β catalyst is loaded into a fixed-bed reactor after being formed. Anhydrous liquid ammonia and ethylene oxide are fed into the fixed-bed reactor by two metering pumps at a ratio of 10:3, and the reaction pressure is controlled at 1.0-5.0MPa, the temperature is 40-160°C, and the volume space velocity is 1.0 ~3.0h -1 . The analysis result of the reactant after deamination treatment is: MEA:DEA:TEA=28:53:19.

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Abstract

The invention discloses a process for continuously producing diethanolamine by using a selective catalyst. The process is characterized by comprising the following steps of: selecting a proper modified microporous material as the catalyst; and feeding ethylene oxide and anhydrous liquid ammonia into a fixed bed reactor according to a certain proportion for reaction, wherein the production of monoethanolamine (MEA) and triethanolamine (TEA) is limited by aperture adjustment of the microporous material and change of reaction process conditions so as to obtain high-content diethanolamine (DEA). The catalyst of the invention is one or mixture of more than two of ZSM-5 zeolite molecular sieve, beta zeolite molecular sieve, ZSM-11 zeolite molecular sieve, SAPO-3 zeolite molecular sieve and APOL-40 zeolite molecular sieve; and the reaction raw materials are the anhydrous liquid ammonia and the ethylene oxide. The process has the advantages of saving consumption of the raw materials and obviously reducing the investment cost, along with short production period and high target product yield.

Description

technical field [0001] The invention belongs to the field of diethanolamine production technology, and more specifically relates to a new technology for obtaining diethanolamine by using a selective microporous material as a catalyst for continuous fixed-bed production. Background technique [0002] The current production of ethanolamine (including monoethanolamine MEA, diethanolamine DEA, and triethanolamine TEA) is obtained by reacting liquid ammonia and ethylene oxide as starting materials. [0003] Under the catalysis of water, ethylene oxide (EO) and ammonia undergo the following continuous reaction: [0004] NH 3 +CH 2 CH 2 O→NH 2 CH 2 CH 2 Oh [0005] NH 2 CH 2 CH 2 OH+CH 2 CH 2 O→NH(CH 2 CH 2 Oh) 2 [0006] NH(CH 2 CH 2 Oh) 2 +CH 2 CH 2 O→N(CH 2 CH 2 Oh) 3 [0007] This reaction is a typical continuous reaction of two reactants and multiple products. The three reactions are carried out simultaneously, so the three reactants exist at the same...

Claims

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Application Information

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IPC IPC(8): C07C215/12C07C213/04B01J29/40B01J29/70B01J29/85B01J29/83B01J7/02B01J35/10
Inventor 连丕勇李其明张照飞王志敏佟天宇尹延超辛春玲赵学勤
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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