Cogeneration method for producing monopotassium phosphate and potassium diformate

A technology of potassium dihydrogen phosphate and potassium diformate, applied in chemical instruments and methods, preparation of phosphorus compounds and carboxylates, etc., can solve the pressure of low price, not to mention popularization of potassium diformate, loss of environmental protection of formic acid, etc. question

Active Publication Date: 2015-11-25
天津市碳一有机合成工程设计有限公司
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Known Chinese patents: CN1704304A, CN1844074A, CN101125809A basically react formic acid with alkali metal oxides, hydroxides or corresponding salts, configure different equipment and processes to produce potassium diformate, and evaporate water out of the system after the reaction , to increase the content of potassium diformate, their reaction is basically an excess of formic acid, such a solution is difficult to separate water by evaporation: when formic acid and water evaporate, they will go from liquid phase to gas phase in the form of azeotropy and then condense, Cooling to obtain an aqueous solution containing formic acid, such a process loses formic acid and the steamed water is discharged under the pressure of environmental protection
U.S. Patent US6137005 (Chinese Publication CN1187807A) mainly reacts 80-95% formic acid with 70-80% potassium formate solution, separates and obtains crystalline potassium diformate and then dries it into a finished product, and then neutralizes the mother liquor with 50% potassium hy...

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
  • Cogeneration method for producing monopotassium phosphate and potassium diformate
  • Cogeneration method for producing monopotassium phosphate and potassium diformate
  • Cogeneration method for producing monopotassium phosphate and potassium diformate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Raw material and output balance sheet

[0060]

[0061] as attached figure 1 Shown: 1#~4# after the tail gas of calcium carbide furnace with installed capacity of 25,500 KVA is purified by dry and wet method: the gas carbon monoxide content is more than 75%, oxygen is less than 0.5%, hydrogen is about 15%, and dust is less than 10mg / Nm 3 , the gas flow rate is 2000~2500Nm 3 / h enters the gas cabinet for storage, in which the dry and wet purification water washing circulation pool 39# supplementary water comes from the process wastewater 48# at the rear, and the dust and coal slurry is fully mixed 38# and sent to the coal-fired boiler 43# as a desulfurizer.

[0062] Potassium hydroxide solution by-product of selective ionic membrane chlor-alkali: content 32% potassium hydroxide, flow rate 10-15Nm 3 / h, enter the preheater 9# (tube preheater) through 8# pressurization to less than 2.4MPa, use the high-temperature gas phase gas after the synthesis of pressure rele...

Embodiment 2

[0068] In the evaporation process of the above-mentioned Example 1 "alkaline potassium formate synthetic liquid", 1000g of molten potassium formate with a content of 90% was taken, and put into a 3000mml stainless steel storage tank 14# with a stirring, heat preservation and electric heating jacket, and an inert gas or electric heating was added. Make the tank have a pressure of 0.1MPa, and connect one of the four tangential inlets at the lower part of the pipeline reactor 16# through the lower outlet through the valve pipeline. The outlet at the 1-meter elevation is equipped with electric heating and insulation jacket, and the upper part is 0.5 meters with a jacket for water heat exchange. The other inlet corresponding to the lower part of the pipeline reactor is connected to the lower part of the 15# 3000ml stainless steel storage tank. The outlet is connected by a valve pipe. The 15# storage tank is filled with 1235g of phosphoric acid with a content of 85%. Add inert gas or...

Embodiment 3

[0073] Get content 85% molten potassium formate 1000g in above-mentioned embodiment 1 " basic potassium formate synthesis liquid " evaporation process, get 1200 content 85% phosphoric acid and adopt the same system and method of embodiment 2, get finished product potassium dihydrogen phosphate 1380g content 98 %, and separated mother liquor distillation, gas phase condensation to obtain 710g of formic acid with a content of 61%, 200g of raffinate after distillation is ready for next use, the yield of potassium dihydrogen phosphate is 96.2%, and the yield of formic acid is 93.0%.

[0074] In above-mentioned embodiment 1 " alkaline potassium formate synthesis liquid " evaporation process, take content 85% molten potassium formate 900g, the formic acid 710g that above-mentioned condensation obtains content 61% adopts the same system and method of embodiment 2, obtains finished product potassium diformate The content of 980g is 98%. Most of the separated mother liquor is returned t...

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 present invention discloses a cogeneration method for producing monopotassium phosphate and potassium diformate. The method comprises: synthesizing an "alkaline potassium formate synthetic liquid" by using inexpensive exhaust gas carbon oxide from a submerged arc furnace and potassium hydroxide; reacting phosphoric acid with potassium formate to producing monopotassium phosphate and a by-product formic acid; and using the formic acid and potassium formate to synthesize potassium diformate, wherein an ''acid mother liquor'' is a by-product and is recycled to neutralize the ''synthetic liquid'' for reducing alkalinity. Compared with the prior art, the technical solution provided by the present invention forms an industry chain to cogenerate potassium diformate and monopotassium phosphate so as to achieve the technical objectives of environmental protection, energy saving and clean production.

Description

technical field [0001] The present invention relates to a kind of method of producing potassium dihydrogen phosphate to co-produce potassium diformate, more specifically, to carbon monoxide and potassium hydroxide to synthesize alkaline potassium formate synthetic liquid, react with phosphoric acid to produce potassium dihydrogen phosphate and co-produce potassium diformate Methods. Background technique [0002] The production of formate in my country started industrial production in the 1950s by the Tianjin Organic Synthesis Plant, and gradually provided free technical services to other oxalic acid, formic acid, and hydrosulfite manufacturers in the form of technical exchange assistance, which improved my country's formic acid production capacity. The overall process technology and equipment production level of salt. In the early 1990s, due to the international oil drilling using potassium formate to prepare drilling fluids, the drilling, well maintenance, and environmental...

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): C01B25/30C07C53/06C07C51/41
CPCY02P20/10
Inventor 姜红远蒋子琪王德明张伯年班志忠李东平
Owner 天津市碳一有机合成工程设计有限公司
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