Producing method for preparing ammonium dihydrogen phosphate byproduct as special fertilizer for white gourd

A technology of ammonium dihydrogen phosphate and production method, applied in the directions of phosphate, phosphorus oxyacid, application, etc., can solve the problems of low purity of ammonium dihydrogen phosphate and unavailability of effective components, and achieve the effect of increasing element content

Inactive Publication Date: 2015-01-21
GUIZHOU KAILIN GRP CO LTD +2
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the process of producing ammonium dihydrogen phosphate from wet-process phosphoric acid, the purity of ammonium dihydrogen phosphate is not high, and the filtrate also contains a large amount of unprecipitated carbonamide, H 2 PO 4 ～ 、HPO 4 2～ 、PO 4 3～ and other substances, the researchers of the present invention have studied the composition content of traditional wax gourd special fertilizer and the absorption of wax gourd from a large number of prior art documents and years of exploration and research, and have effectively explored the production of phosphoric acid diphosphate from wet-process phosphoric acid. The special fertilizer for winter melon is prepared from the filtrate of ammonium hydrogen phosphate to solve the problem that the active ingredients in the filtrate of ammonium dihydrogen phosphate produced by wet-process phosphoric acid cannot be used, etc. There is no report in domestic fertilizer production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Producing method for preparing ammonium dihydrogen phosphate byproduct as special fertilizer for white gourd
  • Producing method for preparing ammonium dihydrogen phosphate byproduct as special fertilizer for white gourd
  • Producing method for preparing ammonium dihydrogen phosphate byproduct as special fertilizer for white gourd

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a kind of production method for preparing ammonium dihydrogen phosphate by-product wax gourd special fertilizer, it is characterized in that comprising the following steps:

[0061] (1) Phosphoric acid and carbonamide prepared by wet-process phosphoric acid are mixed according to the molar ratio of 1.6:1, and the temperature is raised from 90°C to 160°C at a heating rate of 8°C / min, stirred for 4 hours, and the intermediate is separated;

[0062] (2) Then dissolve the intermediate in the phosphoric acid solution, the concentration of the phosphoric acid solution is 17%, adjust the pH of the solution at 3.5, feed ammonia gas into the solution, the ammonia gas and the intermediate are in a molar ratio of 1.1:1, stir React for 3 hours. After the reaction is over, the obtained slurry is placed in a cooling crystallizer to cool down to 25 ° C, and crystallization and filtration are carried out. The filtrate is circulated and crystallized in the coolin...

Embodiment 2

[0068] This embodiment provides a kind of production method for preparing ammonium dihydrogen phosphate by-product wax gourd special fertilizer, it is characterized in that comprising the following steps:

[0069] (1) Phosphoric acid and carbonamide prepared by wet-process phosphoric acid were mixed according to the molar ratio of 1.1:1, and the temperature was raised from 90°C to 160°C at a heating rate of 5°C / min, stirred and reacted for 5 hours, and the intermediate was isolated;

[0070] (2) Then dissolve the intermediate in the phosphoric acid solution, the concentration of the phosphoric acid solution is 20%, adjust the pH of the solution at 3, feed ammonia gas into the solution, the ammonia gas and the intermediate are in a molar ratio of 1.4:1, stir React for 2 hours. After the reaction is over, the obtained slurry is placed in a cooling crystallizer to cool down to 30°C, and crystallization and filtration are carried out. The filtrate is circulated and crystallized in ...

Embodiment 3

[0076] This embodiment provides a kind of production method for preparing ammonium dihydrogen phosphate by-product wax gourd special fertilizer, it is characterized in that comprising the following steps:

[0077] (1) Phosphoric acid and carbonamide prepared by wet-process phosphoric acid are mixed according to the molar ratio of 1.4:1, and the temperature is raised from 90°C to 160°C at a heating rate of 6°C / min, stirred and reacted for 4.5h, and the intermediate is separated;

[0078] (2) Then dissolve the intermediate in the phosphoric acid solution, the concentration of the phosphoric acid solution is 18%, adjust the pH of the solution at 3.2, feed ammonia gas into the solution, the ammonia gas and the intermediate are in a molar ratio of 1.3:1, stir React for 2.5 hours. After the reaction is over, obtain the slurry, and place the slurry in a cooling crystallizer to cool down to 27°C, perform crystallization and filtration treatment, and circulate the filtrate in the cooli...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for preparing an ammonium dihydrogen phosphate byproduct as a special fertilizer for white gourd. Through changing the coefficients such as temperature and the like during the preparation of the ammonium dihydrogen phosphate via wet process phosphoric acid, the purity of the ammonium dihydrogen phosphate product can be improved and a compound fertilizer containing N, P and K combined states can be produced at the same time; through the production method, the purity of the ammonium dihydrogen phosphate can be improved and the produced fertilizer for white gourd is good in absorptivity; and meanwhile, formaldehyde is added into the filter liquor to prepare a controlled release compound fertilizer, so that the produced fertilizer for white gourd is capable of satisfying the nutrient requirements of all stages in the growth period, the yield of the white gourd is greatly increased and the compound fertilizer is efficient.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing ammonium dihydrogen phosphate by-product winter melon special fertilizer. Background technique [0002] Wax gourd is the fruit of the Cucurbitaceae herbaceous plant Wax gourd. It is shaped like a pillow and is native to China. It is a common food on the table of ordinary people in summer. Winter melon has been cultivated and eaten by people very early. In "Shen Nong's Materia Medica", there is a record about wax gourd, which is called "Shuizhi". It is cultivated all over our country, and it is picked when the fruit is ripe in late summer and early autumn. Sweet and light in taste, slightly cold in nature. This product contains protein, sugar, carotene, multivitamins, crude fiber, calcium, phosphorus and iron, and has high potassium salt content and low sodium salt content. Clearing away heat and detoxification, diuresis and elimina...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/28C05G1/00
Inventor 杜绍伦薛涛廖吉星高贵龙张志梅陈肖虎魏发展赵伟毅曾舒
Owner GUIZHOU KAILIN GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap