Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing sodium dihydrogen phosphate and preparing special fertilizer for Rosa roxbunghii as byproduct

A technology of sodium dihydrogen phosphate and special fertilizer, which is applied in the direction of ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, phosphate fertilizer, etc., and can solve the problems of large sodium dihydrogen phosphate products, waste of sodium dihydrogen phosphate, and waste of dihydrogen phosphate Solve the problems of low purity of sodium products, achieve significant environmental protection value and economic benefits, avoid the discharge of waste liquid, and achieve significant economic benefits

Inactive Publication Date: 2015-01-28
GUIZHOU UNIV +2
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in the process of preparing sodium dihydrogen phosphate products, the incomplete crystallization of sodium dihydrogen phosphate will cause a large amount of waste of sodium dihydrogen phosphate, and excessive crystallization of sodium dihydrogen phosphate will bring a large amount of sodium dihydrogen phosphate products. Impurities, and then make the technical problem that the purity of sodium dihydrogen phosphate product is lower

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
  • Method for preparing sodium dihydrogen phosphate and preparing special fertilizer for Rosa roxbunghii as byproduct
  • Method for preparing sodium dihydrogen phosphate and preparing special fertilizer for Rosa roxbunghii as byproduct
  • Method for preparing sodium dihydrogen phosphate and preparing special fertilizer for Rosa roxbunghii as byproduct

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing sodium dihydrogen phosphate and by-product special fertilizer for Rosa roxburghii. Phosphoric acid and carbonamide are added into the reactor at a molar ratio of 1.1:1 and mixed, and then the temperature of the two mixtures is raised at a heating rate of 5°C / min. High to 90°C, stirred and reacted for 120min, then cooled to 35°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and sodium hydroxide were added in the molar ratio of 1:1.1 Mix the reaction in the reaction kettle, adjust the pH value of the reaction to 8.5, and stir the reaction at a stirring speed of 200r / min for 60min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation and crystallization process, and detect and analyze the filtrate at the same time, when the molar ratio of nitrogen and phosphorus in the filtrate is 6:1, s...

Embodiment 2

[0043] A method for preparing sodium dihydrogen phosphate and by-product special fertilizer for Rosa roxburghii. Phosphoric acid and carbonamide are added into the reactor at a molar ratio of 1.3:1 and mixed, and then the temperature of the two mixtures is raised at a heating rate of 5°C / min. High to 120°C, stirred and reacted for 90min, then cooled to 45°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and sodium hydroxide were added in a molar ratio of 1:1.3 Mix the reaction in the reaction kettle, adjust the pH value of the reaction to 9.5, and stir the reaction for 40 minutes at a stirring speed of 250r / min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment , while detecting and analyzing the filtrate, when the mol ratio of nitrogen and phosphorus in the filtrate is 8:3, stop crysta...

Embodiment 3

[0046] A method for preparing sodium dihydrogen phosphate and by-product special fertilizer for Rosa roxburghii. Phosphoric acid and carbonamide are mixed in a reaction kettle at a molar ratio of 1.2:1, and then the temperature of the two mixtures is raised at a heating rate of 5°C / min. High to 110°C, stirred and reacted for 110min, then cooled to 40°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and sodium hydroxide were added in a molar ratio of 1:1.2 Mixed reaction in the reaction kettle, adjust the pH value of the reaction to be 9, and the stirring speed is 220r / min stirring reaction for 50min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment. Simultaneously detect and analyze the filtrate, when the molar ratio of nitrogen and phosphorus in the filtrate is 7:2, stop crystallizati...

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 industry, and discloses a method for preparing sodium dihydrogen phosphate and preparing a special fertilizer for Rosa roxbunghii as a byproduct. The method comprises the following steps: reacting phosphoric acid with carbomite by analyzing nutritional elements required by Rosa roxbunghii to prepare an intermediate, reacting the intermediate with an alkaline sodium salt to prepare sodium dihydrogen phosphate, controlling the content ratio of nutrients in a filtrate in the sodium dihydrogen phosphate crystallizing process, and adding potassium and other trace element compounds to the sodium dihydrogen phosphate separated filtrate in order to prepare the special fertilizer for Rosa roxbunghii. The prepared special fertilizer for Rosa roxbunghii can improves the output of Rosa roxbunghii, and the prepared sodium dihydrogen phosphate has a high purity and a relatively low cost.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing sodium dihydrogen phosphate and by-product special fertilizer for Rosa roxburghii. Background technique [0002] Rosa roxburghii is a unique wild resource in the Yunnan-Guizhou Plateau and the Western Sichuan Plateau, and is called "thorn plum" by the locals. Also known as Ci pear and wood pear, also known as Songchungui, sour pear, nine-headed bird, and Wenxian fruit, it is a nutritious and precious fruit for nourishing and fitness. The harvest period of prickly pear is less than 30 days. The fruit of Rosa roxburghii is ripe from August to September, yellow and sometimes reddish. The flesh is crisp and has a strong aroma when ripe. Small fleshy thorns grow densely on the peel, commonly known as "thorn pear". The fruit is rich in vitamin C, known as the "King of Vitamin C". The medicinal value of Rosa roxburghii is very high. Its flowers, lea...

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
IPC IPC(8): C01B25/30C05G1/00C05B7/00
Inventor 陈肖虎郑培俊高贵龙廖吉星薛涛廖川曾舒赵平原黄芳唐晓宁
Owner GUIZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com