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Ammonium sulfamate demulsifier, synthesis method thereof and application of ammonium sulfamate in cold rolling of waste emulsion

A technology of demulsifier and ammonium sulfonate, applied in the field of physical chemistry, can solve the problems of low demulsification efficiency and achieve the effects of high demulsifier yield, less side reactions and high demulsification efficiency

Inactive Publication Date: 2015-03-25
武汉钢铁有限公司
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Problems solved by technology

[0003] A technical problem to be solved by the present invention is to provide an ammonium sulfonate demulsifier to solve the problem that the demulsification efficiency is not high when the existing demulsifier is used for cold rolling waste emulsion

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  • Ammonium sulfamate demulsifier, synthesis method thereof and application of ammonium sulfamate in cold rolling of waste emulsion
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  • Ammonium sulfamate demulsifier, synthesis method thereof and application of ammonium sulfamate in cold rolling of waste emulsion

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The preparation steps of cold rolling waste emulsion demulsifier of the present invention are as follows:

[0018] 1) Take 500ml of glycerol in a beaker, slowly heat to 50°C, and then add 200ml of boron trifluoride ether;

[0019] 2) After slowly adding 55ml of epichlorohydrin to the above reaction system, the reaction continued for 8 hours;

[0020] 3) After the above reaction is finished, allow the reaction system to cool down to room temperature naturally;

[0021] 4) Add 55 ml of ethanol solution of sodium hydroxide dropwise to the above reaction system, and allow the reaction system to react at room temperature for 7 hours;

[0022] 5) After the reaction finishes, the reaction system is cooled to room temperature, and filtered to remove solids, which are mainly sodium chloride solids;

[0023] 6) the filtrate is put int...

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Abstract

The invention discloses an ammonium sulfamate demulsifier, a synthesis method thereof and application of ammonium sulfamate demulsifier in cold rolling of a waste emulsion. The ammonium sulfamate demulsifier is prepared according to the following steps: (1) carrying out etherification reaction, namely adding boron trifluoride etherate into glycerol, dropwise adding propylene oxide slowly to carry out reaction, dropwise adding solution of sodium hydroxide in ethanol, filtering, and carrying out reduced pressure distillation to obtain a viscous transparent liquid product of etherification reaction; (2) carrying out sulfation reaction, namely mixing sulfamic acid and urea uniformly, slowly adding the mixture of sulfamic acid and urea into the product of etherification reaction from the step (1), adding 200ml of water after the sulfation reaction is finished, and neutralizing the mixture with an alkali until the pH value is 7.0-8.5 so as to obtain a crude product; and (3) purifying the crude product to obtain the light-yellow waxy demulsifier. The synthesis method of the ammonium sulfamate demulsifier is simple, less side reaction is generated, and the yield and the demulsification efficiency of the ammonium sulfamate demulsifier are high.

Description

technical field [0001] The invention belongs to the technical field of physics and chemistry, and in particular relates to an ammonium sulfonate demulsifier, a synthesis method thereof and an application in cold rolling waste emulsion. Background technique [0002] Emulsion is an essential raw material for the cold rolling process in the metallurgical industry, mainly for cooling and lubrication. The emulsion is mainly a mixed liquid formed by emulsifying and mixing rolling oil, vegetable oil and distilled water. At present, the emulsions of major steel mills are recycled after purification. During the purification process, the contaminated waste emulsified oil is discharged to form waste emulsified oil. Waste emulsified oil is discharged together with wastewater to form oily wastewater from cold rolling. The key to treating oily wastewater from cold rolling is to demulsify wastewater so that oil and water can be easily separated. There are various demulsification methods,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C305/10C07C303/24C10G33/04
Inventor 刘尚超薛改凤段建峰刘璞王丽娜卢丽君张垒周泳付本全刘瑛
Owner 武汉钢铁有限公司
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