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Method for preparing amides by-product industrial ammonium chloride

A technology of by-product industry and production method, which is applied in the field of ammonium chloride production technology, can solve problems such as the separation and use of unsuitable organic matter and ammonium chloride, complex chemical reactions and other by-products, and achieve the problem of separation, recovery and utilization, protection Equipment and raw materials, precise effect of pressure

Inactive Publication Date: 2017-05-31
NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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Problems solved by technology

[0007] The above two technologies are aimed at the separation of ammonium chloride from inorganic materials, which have relatively complicated chemical reactions and other by-products, and are not suitable for the separation of organic matter and ammonium chloride.

Method used

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  • Method for preparing amides by-product industrial ammonium chloride

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below.

[0023] (1) In the adsorption process, the ammonium chloride-containing amide oil solution passes through the resin tower to absorb the oil layer. The adsorption resin is XDA-11 type, and the adsorption temperature is preferably about 55-65°C.

[0024] After the adsorption is completed, use nitrogen to carry out two-stage backflushing of the resin tower in sequence, and backflush the ammonium chloride mother liquor in the tower to the ammonium chloride solution storage tank, and the nitrogen purge pressure is 0.2-0.3MPa.

[0025] When the resin tower is regenerated, it should be cleaned with condensed water first, and then analyzed twice with methanol to dissolve the oil agent adsorbed by the resin into methanol; finally, the resin should be cleaned with condensed water, and the pressure of the washing pump should be about 0.4-0.8MP .

[0026] (2) In the...

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Abstract

The invention discloses a method for preparing amides by-product industrial ammonium chloride, and a working process with the following sequence is adopted: an adsorption process, an evaporation process and a drying process: the adsorption resin in the adsorption process is XDA- 11 type, the adsorption temperature is preferably 55 to 65 DEG C; the first-effect evaporation temperature in the evaporation process is 110 to 130 DEG C, the two-effect evaporation temperature is 90 to 110 DEG C, and the three-effect evaporation temperature is below 40 to 60 DEG C. The method of the invention can basically completely separate and recycle the ammonium chloride salts in the amide oil agent, so that the purity of the amides can be improved, and the invention can be directly applied to other fields, thereby saving the resource consumption.

Description

technical field [0001] The invention relates to an ammonium chloride production process. Background technique [0002] Ammonium chloride wastewater is organic and inorganic wastewater of different concentrations mainly containing ammonium chloride produced in the production process of chemical fertilizers, rare earths, printing, electroplating and other products. If the waste water is directly discharged, it will not only increase the production cost of the enterprise, but also cause pollution to the environment. With the strengthening of the country's environmental protection and the rising energy prices in recent years, enterprises are facing enormous pressure to control the three wastes. The amide oil agent is condensed, neutralized and dissolved in hot water to generate a by-product ammonium chloride aqueous solution. For the treatment of ammonium chloride wastewater, the main process methods are multiple effect evaporation, membrane technology and MVR technology. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/16C02F101/16
CPCC02F9/00C01C1/164C02F1/048C02F1/28C02F2101/16
Inventor 朱海桃庞长国石金砺吴晓伟谢继承
Owner NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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