Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for extracting industrial salt by-products in manufacture of epoxy resin

An extraction method and technology for industrial salt, applied in the direction of alkali metal chloride, etc., can solve the problems of difficult to handle high-concentration brine, poor economic benefits, large steam and electricity consumption, etc.

Inactive Publication Date: 2012-02-29
臧小余 +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using this extraction process, although the environmental protection problem that the high-concentration salt water produced in the production process of epoxy resin is difficult to handle is solved, and the by-product industrial salt is also obtained, due to the multi-effect evaporation that requires a large amount of steam and electricity, each ton of industrial The required cost of salt is very high, and the production efficiency of the by-product industrial salt produced is far less than the manufacturing cost, the economic benefit is poor, and the consumption of steam and electricity is large

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 extracting industrial salt by-products in manufacture of epoxy resin
  • Method for extracting industrial salt by-products in manufacture of epoxy resin
  • Method for extracting industrial salt by-products in manufacture of epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of Coarse Salt

[0032] Transfer 5 tons of toluene (from solvent tank 3), 3 tons of saturated brine, and 13.3 tons of crude resin (10 tons of resin, 3.3 tons of salt) to the first reaction kettle 1; adjust the temperature to 50 ° C, and dissolve at this temperature for 20 minutes , after dissolving, leave it still for 20min; transfer the toluene resin layer to the refining kettle 5 from the valve 9 in the middle of the first reactor 1 to continue the refining process; the remaining materials in the first reactor 1 are NaCl crystals and saturated brine.

[0033] (2) Refining of crude salt

[0034] Add 3 tons of toluene (from the fresh solvent tank 4) into the first reaction kettle 1; adjust the temperature to 50°C, dissolve at this temperature for 20 minutes, and after the dissolution is complete, let it stand for 20 minutes; Transfer the toluene in the upper part to the solvent tank 3; repeat the above steps once; add 4 tons of toluene (from the fresh s...

Embodiment 2

[0040] (1) Preparation of Coarse Salt

[0041] Transfer 50 tons of benzene (from solvent tank 3), 20 tons of saturated brine, and 13.3 tons of crude resin (10 tons of resin, 3.3 tons of salt) to the first reaction kettle 1; adjust the temperature to 90°C, and dissolve at this temperature for 60 minutes , after the dissolution is complete, let stand for 60min; transfer the benzene resin layer to the refining kettle 5 from the valve 9 in the middle of the first reactor 1 to continue the refining process; the remaining materials in the first reactor 1 are NaCl crystals and saturated brine.

[0042] (2) Refining of crude salt

[0043] Add 3 tons of benzene (from the fresh solvent tank 4) into the first reaction kettle 1; adjust the temperature to 90°C, dissolve at this temperature for 60 minutes, and let it stand for 60 minutes after the dissolution; Transfer the benzene in the upper part to the solvent tank 3; repeat the above steps twice; add 4 tons of benzene (from the fresh s...

Embodiment 3

[0049] (1) Preparation of Coarse Salt

[0050] Transfer 10 tons of methyl isobutyl ketone MIBK (from solvent tank 3), 4 tons of saturated brine, and 13.3 tons of crude resin (10 tons of resin, 3.3 tons of salt) to the first reaction kettle 1; adjust the temperature to 70 ° C, Dissolve at this temperature for 30 minutes, after the dissolution is complete, let it stand for 30 minutes; transfer the MIBK resin layer from the valve 9 in the middle of the first reactor 1 to the refining kettle 5 to continue the refining process; the remaining material in the first reactor 1 is NaCl crystals and saturated brine.

[0051] (2) Refining of crude salt

[0052] Add 3 tons of MIBK (from the fresh solvent tank 4) into the first reaction kettle 1; adjust the temperature to 70°C, dissolve at this temperature for 30 minutes, and let it stand for 30 minutes after the dissolution; from the valve 9 in the middle of the first reaction kettle 1 Transfer the upper MIBK to the solvent tank 3; repea...

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 provides a method for extracting industrial salt by-products in the manufacture of epoxy resin. The method comprises the following steps of: adding a benzene solvent and / or a methyl isobutyl ketone solvent and saturated brine to crude resin for dissolving and separating the solvent, carrying out the process for many times, carrying out crystal education and centrifugal separation onfinally obtained crystal salt and the saturated brine, and drying and firing the obtained crystal salt to obtain the industrial salt at last. By adopting the method, the usage amount of steam, electricity and manpower can be greatly reduced, the cost is saved, and the quality of obtained industrial salt products meets the national standards.

Description

technical field [0001] The invention relates to the production of epoxy resin, in particular to a method for extracting by-product industrial salt in the production process of epoxy resin. Background technique [0002] Epoxy resins are manufactured through condensation reactions and ring closure reactions during which salts (NaCl) are produced. If the salt (NaCl) produced by the reaction is extracted and treated to meet the standard of industrial salt, it can be used as a by-product of epoxy resin production. [0003] The existing extraction method is that the crude resin obtained after the epoxy resin production reaction is transferred to a certain amount of solvent (toluene or MIBK, etc.) and fully stirred and dissolved in water, and after standing still, the resin is dissolved in the upper solvent layer , the salt (NaCl) is dissolved in the water in the lower layer, after the brine in the lower layer is neutralized, after multi-stage filtration, a neutral, solvent-free a...

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 Patents(China)
IPC IPC(8): C01D3/04
Inventor 臧小余陈小金
Owner 臧小余