Novel process for producing ammonium tertiary phosphate by using waste ammonia and waste phosphoric acid

A technology of waste phosphoric acid and ammonium phosphate, which is applied in the direction of phosphate, phosphorus oxyacid, etc., can solve the problems of waste ammonia water, waste phosphoric acid, high production cost of ammonium phosphate, polluted water source, environment, etc., to achieve low production cost, Ease of promotion and less investment

Inactive Publication Date: 2008-10-01
王天伦
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Problems solved by technology

[0003] The purpose of the present invention is to provide a new process for producing ammonium phosphate by using waste ammonia water and waste phosphoric acid, so as to solve the prob

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  • Novel process for producing ammonium tertiary phosphate by using waste ammonia and waste phosphoric acid
  • Novel process for producing ammonium tertiary phosphate by using waste ammonia and waste phosphoric acid

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[0013] Process Description

[0014] 1. Raw materials: Waste ammonia water from coking plants, chemical fertilizer plants and chemical plants containing more than 7% of effective ammonia is used. Waste phosphoric acid is waste phosphoric acid containing 25-92% phosphorus from pharmaceutical, electronic and feed processing industries. Strong oxidation catalysts are used. Naoh and Ca(oh) 2 .

[0015] 2. Distillation. Put the waste ammonia water into the distillation axe, add a strong oxidation catalyst, and then heat it to 55-93°C. The ammonia can be decomposed from the waste ammonia water. Stop when the ammonia concentration drops below 0.5%. The waste residue in the distillation ax is discharged into the sedimentation tank, and then new waste ammonia and catalyst are added, and then heated and distilled.

[0016] 3. Neutralization reaction: Pour the waste phosphoric acid into the reaction tank, and pass the distilled ammonia gas directly into the reaction tank for neutralizat...

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Abstract

The invention belongs to a novel technology for producing ammonium phosphate by utilizing waste ammonia and waste phosphoric acid. The novel process is characterized in that the waste ammonia containing more than 7 percent of ammonium is used for being heated and distillated under the action of a strong oxidative catalyst; the distillated ammonium is then neutralized and reacted with the waste phosphoric acid containing 25 to 92 percent of phosphorus, and finally, the obtained mixture is treated with spin drying to prepare the ammonium phosphate. Compared with the prior art, the novel technology of the invention is simple with low investment and quick returns and also has low production cost by utilizing the waste ammonia and the waste phosphoric acid to make full use of available resources, thus reducing environmental pollution and opening up a new way for the comprehensive utilization of the waste ammonia of chemical plants, coking plants and fertilizer plants as well as the waste phosphoric acid of medicine, electronics and feed processing industries.

Description

technical field [0001] The invention relates to a production process of ammonium phosphate, which is a new process for producing ammonium phosphate by using waste ammonia water and waste phosphoric acid. Background technique [0002] At present, ammonium phosphate is produced by reacting phosphoric acid with a concentration of 85-95% and ammonium carbonate with a concentration of 17%. This method has high production costs, and if it is calculated from the raw materials, the process is complicated and the investment is large. At present, waste ammonia water containing more than 8% ammonia in coking plants, chemical fertilizer plants and chemical plants is discharged into the ditch without utilization. Waste phosphoric acid containing 25% to 70% phosphorus in the pharmaceutical, electronic and feed processing industries is also discharged into the ditch without utilization, which not only pollutes water sources and the environment, but also wastes precious resources. Content...

Claims

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Application Information

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IPC IPC(8): C01B25/28
Inventor 王天伦
Owner 王天伦
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