Fatty acid ester alkoxylating method and dedicated equipment therefor

A technology for fatty acid ester alkoxylation and alkoxylation, which is applied in the field of fatty acid ester alkoxylation method and its special equipment, and can solve unsuitable fatty acid ester alkoxylation and unsuitable alkoxylation methods, etc. problems, achieve the effects of suppressing side reactions, excellent reactivity and selectivity, and short production time

Active Publication Date: 2007-12-26
LIAONING OXIRANCHEM INC +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing alkoxylation method is not suitable for the alkoxylation of fatty acid esters and the problem of post-processing and that the existing reactor is not suitable for the alkoxylation method of the present invention, a method is proposed Fatty acid ester alkoxylation method using solid catalyst and its special equipment

Method used

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  • Fatty acid ester alkoxylating method and dedicated equipment therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example is the preparation of the catalyst.

[0029] Weigh 18KgAl(NO 3 ) 3 .9H 2 O, add 22.5Kg of deionized water to prepare aluminum nitrate solution, and pour it into the high-level liquid tank when it is completely dissolved. Add 175Kg of deionized water to a 500L enamel kettle, start stirring, slowly add 23KgMgO in batches from the manhole at 25°C to make it completely dispersed, after adding MgO, stir at constant temperature for 20 minutes, and then slowly add dropwise at 25°C. A good aluminum nitrate solution, drip for 20 minutes, mature at a constant temperature of 25°C for 50 minutes, and then wash. Add 200Kg of deionized water and stir for 10 minutes, filter under reduced pressure, and repeat washing and filtering until the pH of the system is between 6.5-7.5. Add 8Kg of clay to the filter cake, mix it evenly, and then press it into a shape. The shaped ring-shaped catalyst is placed in a thermostat and dried at 100°C for 10 hours. Then take 5Kg of 5% potassium...

Embodiment 2

[0031] We took 20Kg of the ring-shaped catalyst of Example 1 and installed it on the two-layer catalyst bed of the equipment of the present invention, and made the catalyst of each bed 10Kg, and fixed it with a sieve plate with an aperture of 3mm.

[0032] All the following examples are performed on this equipment. For different kinds of products, we use 100℃ water circulation washing reaction equipment for 20 minutes, 50℃ ethanol circulation washing for 20 minutes, and then vacuum drying at 100~110℃ for 20 minutes. Continue to use after handling the reaction equipment.

[0033] Vacuum 15Kg of methyl laurate into the tower kettle, start the circulation pump and the vacuum pump, raise the temperature to 100-110°C for vacuum dehydration for 20-40 minutes, and then stop the dehydration. Raise the temperature to 140℃, open the ethylene oxide feed valve, and introduce 0.5Kg of ethylene oxide. At this time, the pressure is 0.2mPa. Close the feed valve. When the temperature of the system...

Embodiment 3

[0035] Vacuum 5Kg methyl laurate into the tower kettle, start the circulation pump and vacuum pump, raise the temperature by 100-110°C, vacuum dehydration for 20-40 minutes, and then stop dehydration. Increase the temperature to 140°C, open the ethylene oxide feed valve, and pass in 0.5Kg of ethylene oxide. At this time, the pressure is 0.15mPa. Close the feed valve. When the system temperature rises and the pressure drops, continue to pass in ethylene oxide Alkane, keep the reaction temperature at 135-155°C and the pressure at 0.4mPa. After 18 minutes, 44.5Kg of ethylene oxide was introduced, the epoxy feed valve was closed, the feeding was stopped, the material was kept circulating for 20 minutes, the temperature was lowered to 60-80°C, the circulation pump was turned off, and the finished product was 49.7Kg. The results of the reaction are shown in Table 1.

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Abstract

The invention discloses a method of fatty acid ester alkoxylating and its reactor, which is to solve problems of unsuitness of the current alkoxylating method for alkoxylation of fatty acid ester not containing reactive hydrogen and after-treatment existence and unsuitness of the current reactor for this inventive method, presents employing composite aluminum-magnesium catalyst for the method and reactor in this invention, the reactor comprising catalyst fixing bed, tower still, heat-exchange machine and circulating pump, the method in this invention is characterized by no existence of after-treatment, simple process, small investment for device, short producing time, low energy consumption, no environmental pollution and wide application range.

Description

Technical field [0001] The invention relates to a fatty acid ester alkoxylation method and its special equipment, more specifically, the invention relates to a fatty acid ester alkoxylation method using a solid catalyst and its special equipment. Background of the invention [0002] Conventional alkoxylation reactors include batch tank reactors, Italian Press reactors, Swiss Buss reactors, etc. Almost all of these reactors are liquid-soluble or insoluble catalysts and those containing active hydrogen. raw material. These catalysts are all in the reaction product and will face a post-processing problem, and for the alkoxylation reaction of fatty acid esters, since the raw material molecules do not contain active hydrogen atoms, conventional catalysts cannot be used. In the synthesis of oleochemical raw materials, most of them start from natural oils, which are readily available and inexpensive. The characteristics of fatty acid ester alkoxylation products are: ① fast water solubil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/31
Inventor 朱建民刘兆滨董振鹏仲崇纲
Owner LIAONING OXIRANCHEM INC
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