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Method of recycling wastewater generated during stearate production through one-step method

A technology of stearate and calcium stearate, which is applied in the field of waste water reuse produced by one-step production of stearate, and achieves the effects of saving water costs, saving waste water treatment costs, and saving water consumption.

Inactive Publication Date: 2016-02-17
HANGZHOU OIL & FAT CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to produce a large amount of waste water problem in the existing stearate production, provide a kind of one-step method to produce stearate and produce the method for waste water reuse, and this method operation process is simple and easy, utilizes equipment simple, and product quality is not affected by impact, and can save production costs and wastewater treatment costs, with economic and social benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 9 tons of water in one pot and after the reaction of producing calcium stearate by one-step method is completed, the calcium stearate solution is sent to the plate and frame filter press for pressure filtration, the calcium stearate remains in the plate and frame, and the filtrate is transported To the filtrate head tank, the weight of water shown in the filtrate head tank is 8.1 tons; continue production, add 8.1 tons of filtrate to the reactor, then add 1 ton of stearic acid, start stirring, continue to add 900 kg of hot water, and heat the reactor Up to the reaction temperature, then add the measured calcium hydroxide, and keep stirring until the reaction is completed. The product calcium stearate meets the product standard, the water consumption is 10% of that when not reused, and the waste water discharge is 0.

Embodiment 2

[0020] After adding 9 tons of water in one kettle to produce zinc stearate by one-step method, the zinc stearate solution is sent to the plate and frame filter press for pressure filtration, the zinc stearate remains in the plate and frame, and the filtrate is transported To the filtrate head tank, the weight of water shown in the filtrate head tank is 8.5 tons; continue production, add 8.5 tons of filtrate to the reactor, then add 1 ton of stearic acid, start stirring, continue to add 500 kg of hot water, and heat the reactor Up to the reaction temperature, then add the measured zinc oxide and catalyst, and keep stirring until the reaction is completed. The product zinc stearate meets the product standard, the water consumption is 5.6% of that when not reused, and the waste water discharge is 0.

Embodiment 3

[0022] After adding 9 tons of water in one kettle to produce magnesium stearate by one-step method, the magnesium stearate solution is sent to the plate and frame filter press for pressure filtration, the magnesium stearate stays in the plate and frame, and the filtrate is transported To the filtrate head tank, the weight of water shown in the filtrate head tank is 7.8 tons. Continue production, add 7.8 tons of filtrate to the reactor, then add 1 ton of stearic acid, start stirring, continue to add 1200 kg of hot water, heat the reactor until the reaction temperature, then add the measured magnesium oxide and catalyst, and continue to stir. until the reaction is complete. The product magnesium stearate meets the product standard, the water consumption is 13.3% of that when not reused, and the waste water discharge is 0.

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Abstract

The invention relates to a method of recycling wastewater generated during stearate production through a one-step method. The method is simple in operation process and convenient to operate, equipment is easy to use, product quality is not affected, production cost and wastewater treatment cost can be saved, and economic and social benefits are obtained. According to the technical scheme, the method of recycling the wastewater generated during stearate production through the one-step method comprises the first step of collecting stearate wastewater in time in the production process, conducting filtration and then collecting filtrate; the second step of recycling the collected filtrate first during secondary production and then supplementing water lacked in production for production, wherein the amount of supplemented water is between zero and one fifth of the total volume of a reaction kettle; the third step of repeating the first step and the second step for continuous production.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a method for recycling waste water produced by one-step production of stearate. Background technique [0002] Different stearates are added to different products to perform different functions, which can bring many benefits to polymer products. A variety of stearates can be used as thermal stabilizers for polymer materials, which directly contribute to the anti-corrosion of the color stabilizers of polymer materials; they can be used as lubricants when processing polymer materials; for thermoplastics, rubber and It can be used as a release agent for thermosetting products. [0003] Manufacturers of stearate generally produce a variety of stearate products, such as calcium stearate, zinc stearate, barium stearate and lead stearate. One-step production of stearate is produced by reacting stearic acid with the corresponding metal salt oxide or hydroxide in the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/126
CPCC07C51/412
Inventor 吴江浩周建东郭霞蒋海刚王晓辉
Owner HANGZHOU OIL & FAT CHEM
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