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

Method used for combined production of hydrazine hydrate and calcium chloride by saponification slag

A technology of hydrazine hydrate and saponification slag, applied in the direction of calcium/strontium/barium chloride, nitrogen and non-metallic compounds, hydrazine, etc., to achieve the effect of reducing pollution

Active Publication Date: 2014-01-01
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY +1
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no industrialized device in China; air oxidation method: in the presence of a catalyst, benzophenone and ammonium are dehydrated and condensed to generate dibenzylidene amine, and then under the action of a cuprous chloride catalyst, the imine is oxidatively coupled to generate diphenylmethylene Azine ketone, finally hydrolyzing azine to obtain hydrazine, and recovering benzophenone at the same time

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 used for combined production of hydrazine hydrate and calcium chloride by saponification slag

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] 1 Preparation of hydrazine hydrate:

[0030] 1.1 Preparation of calcium hypochlorite:

[0031] CaCO and Ca(OH) in saponified slag are active ingredients. Saponification slag (particle size 40-60 mesh) is prepared with water to make a slurry with w% 20-30, the best is 25% concentration, chlorine gas is slowly passed into the prepared saponification slag slurry, the active ingredient reacts with chlorine gas to generate hypochlorous acid Calcium, the pH of the final control solution is 1-4, the best value is 2, so that the solution does not contain CO 2 , The available chlorine concentration in the obtained calcium hypochlorite feed liquid is 100g / l-200g / l.

[0032] 2CaCO 3 + 2Cl 2 =Ca(ClO) 2 + CaCl 2 + 2CO 2 ↑

[0033] 2Ca(OH) 2 + 2Cl 2 =Ca(ClO) 2 + CaCl 2 + 2H 2 o

[0034] Reduce the temperature of the resulting calcium hypochlorite to 0 0 C or so.

[0035] 1.2 Preparation of ferromolybdenum catalyst:

[0036] National standard i...

Embodiment

[0047] Catalyst preparation:

[0048] Weigh industrial pure ammonium dimolybdate ((NH 4 ) 2 Mo 2 o 7 , molecular weight 339.9527) and iron nitrate (Fe(NO3)3 9H2O

[0049] Molecular weight: 404.02) 8.5 kg and 13.47 kg, molecular ratio Mo:Fe=3:2, soluble in 85 kg and 81 kg in water respectively. Mix in a 50-liter enamel kettle with stirring and jacket, adjust the pH of the solution to 8 with nitric acid, start stirring, pass 90°C hot water into the jacket to raise the temperature of the material in the kettle to 75°C for 1 hour, stop heating, and pass cold water to make The material in the kettle was down to room temperature and left to stand for 5 hours. Dry at 120°C to constant weight, and then bake at 500°C for 4 hours to obtain about 6 kg of Mo-Fe catalyst, which is broken into particles with a particle size of 2-5mm.

[0050] Calcium hypochlorite preparation:

[0051] Add 600 kg of water to 1 cubic meter of enamel attached middle school with stirring, star...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a method used for combined production of hydrazine hydrate and calcium chloride by waste saponification slag, and relates to a method used for preparing calcium chloride. The method comprises following steps: chlorine gas is delivered into waste saponification slag obtained in production processes of epoxypropane so as to obtain calcium hypochlorite solution; calcium hypochlorite solution is reacted directly with ammoniacal liquor in the presence of Mo-Fe catalyst so as to obtain hydrazine hydrate, wherein Mo-Fe catalyst can be filtered for recycling, the distilling mother liquor of hydrazine hydrate is saturated calcium chloride solution and is used for producing solid calcium chloride, and the main component of filter residue obtained in production processes of hydrazine hydrate is CaCO3; and the filter residue is reacted with byproduct hydrochloric acid to produce calcium chloride solution, and solid calcium chloride is obtained finally. According to the method combined production of hydrazine hydrate and calcium chloride is realized by waste saponification slag, so that waste is changed into valuables, more than 60% of saponification slag is reduced, no new pollution sources are generated, and environment pollution is reduced greatly.

Description

technical field [0001] The invention relates to a method for preparing hydrazine hydrate and co-producing calcium chloride, in particular to a method for preparing hydrazine hydrate and calcium chloride by using waste saponification slag. Background technique [0002] Propylene oxide (PO) is one of the important chemical raw materials. Among the propylene derivatives, propylene oxide ranks third after polypropylene and acrylonitrile. Mainly used in the production of polyurethane, unsaturated polyester and surfactants. By the end of 2007, the production capacity of propylene oxide in the world reached 8 million t / a. my country's propylene oxide production capacity in the same period was 750,000 t / a. Due to the increasing demand for polyurethane and unsaturated polyester, the production capacity of propylene oxide will increase at a rate of more than 10%. [0003] There are three industrial methods for producing PO from propylene: one is the chlorohydrin method, the oth...

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): C01B21/16C01F11/24
Inventor 高淑芝薛之化陈淑艳刘欢李慎华徐鈞刘秀娟刘忠良
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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