Energy-saving environment-friendly co-production process of cyanuric acid, food-grade sulfuric acid and sulfamic acid

A technology of sulfamic acid, energy saving and environmental protection, applied in the direction of sulfamic acid, chemical industry, sulfur compounds, etc., can solve the problems of low heat energy utilization rate, energy waste, etc., and achieve the effect of simplifying the production process and shortening the production cycle

Inactive Publication Date: 2016-04-27
SHANDONG MINGHUI NEW MATERIAL CO LTD
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Problems solved by technology

The production process of food-grade sulfuric acid will generate a large amount of heat energy, but the utiliza

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Embodiment Construction

[0033] The present invention will be described in detail below through specific embodiments.

[0034] A co-production process of energy-saving and environment-friendly cyanuric acid, food-grade sulfuric acid and sulfamic acid, comprising the following steps:

[0035] (1) Production of cyanuric acid: urea is placed in a pyrolysis furnace for pyrolysis and cyclization, and the pyrolysis and cyclization produces ammonia gas at 150-250°C;

[0036] (2) Production of food-grade sulfuric acid: melting sulfur; burning sulfur; transforming; absorbing, drying; waste heat recovery; wherein the 850-1000°C sulfur dioxide gas produced in the process of burning sulfur first passes through the heat in the production of step (1) cyanuric acid After heat exchange in the furnace, sulfur dioxide gas at 420°C enters the converter;

[0037] (3) The production of sulfamic acid: after the ammonia in the described step (1) cyanuric acid production is drawn through induced draft fan, at first remove s...

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Abstract

The invention relates to the technical field of chemical industry production, and specifically relates to an energy-saving environment-friendly co-production technology of cyanuric acid, food-grade sulfuric acid and sulfamic acid. The co-production process comprises the steps of (1) cyanuric acid production; (2) food-grade sulfuric acid production including sulfur melting, sulfur burning, conversion, absorption and drying, and residual heat recovery; and (3) sulfamic acid production. With the co-production process, defects in independent production links of cyanuric acid, food-grade sulfuric acid and sulfamic acid are solved, and no additional environmental treatment equipment is needed, such that the production process is greatly simplified, and the production period is shortened. The process is safe, energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a co-production process of energy-saving and environment-friendly cyanuric acid, food-grade sulfuric acid and sulfamic acid. Background technique [0002] Cyanuric acid, also known as cyanuric acid, is a white crystal that precipitates from water with two crystal waters. Slightly bitter taste, basically non-toxic, soluble in hot water, slightly soluble in cold water, acidic aqueous solution, soluble in potassium hydroxide and sodium hydroxide aqueous solution, insoluble in cold alcohol, ether, benzene and other organic solvents. There are two isomers, the keto and the enol structures, usually as a mixture of the two isomers. At present, cyanuric acid is produced by pyrolysis of urea, and cyanuric acid is obtained through pyrolysis and cyclization of urea. The pyrolysis and cyclization of urea in the pyrolysis furnace will produce a large amount of ammoni...

Claims

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Application Information

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IPC IPC(8): C07D251/32C01B17/54C01B17/74C01B21/096
CPCC01B17/54C01B17/74C01B21/096C07D251/32Y02P20/10Y02P20/50
Inventor 成其明
Owner SHANDONG MINGHUI NEW MATERIAL CO LTD
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