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Method for resource utilization of solid waste in industrial production of vitamin b6

A vitamin and solid waste technology, applied in the field of waste resource utilization, can solve problems such as difficult to burn and difficult to handle, and achieve the effect of solving environmental protection problems and improving effective income

Active Publication Date: 2021-06-01
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The by-product of this process is a black paste-like substance, which is difficult to burn and difficult to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add a certain mass of black paste to melamine in a four-necked flask with a mass ratio of 1:1, ethanol and n-butanol, and then add a corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of 1:1. Stir in an oil bath for 4 hours, increase the temperature to 180°C and stir for 1 hour, until the viscosity is suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet along the vertical and horizontal directions. Dry in an oven at ℃ for 2h~6h, the coating film is dry, but the coating film cannot be dried.

Embodiment 2

[0021] Add a certain mass of black paste to melamine in a four-necked flask with a mass ratio of 1:1, ethanol and n-butanol, and then add a corresponding mass of epoxy resin to the four-necked flask at a mass ratio of 1:2. Stir in an oil bath for 4 hours, increase the temperature to 180°C and stir for 1 hour, until the viscosity is suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet along the vertical and horizontal directions. Dry in an oven at ℃ for 2h to 6h. After the coating film is dry, soak 2 / 3 of the coating film in 10% HCl, 10% NaOH and 7% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >30d, 5d and >30d respectively.

Embodiment 3

[0023] Add a certain mass of black paste to melamine in a four-necked flask with a mass ratio of 1:1, ethanol and n-butanol, and then add a corresponding mass of epoxy resin to the four-necked flask at a mass ratio of 1:3. Stir in an oil bath for 4 hours, increase the temperature to 180°C and stir for 1 hour, until the viscosity is suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet along the vertical and horizontal directions. Dry in an oven at ℃ for 2h to 6h. After the coating film is dry, soak 2 / 3 of the coating film in 10% HCl, 10% NaOH and 7% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >30d, 11d and >30d respectively.

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Abstract

The invention discloses a resource utilization method of solid waste in industrial production of vitamin B6. The method comprises the following steps: mixing the vitamin B6 industrial production solid waste with melamine, using ethanol as a solvent, stirring and reacting at 90° C. for 3 to 6 hours, after the reaction is completed, suction filtering, and drying; the product obtained in step 1 is mixed with epoxy resin Mixing, ethanol and n-butanol as solvent, stirring and reacting at 90°C for 1-3 hours, raising the temperature to 180°C and stirring for 1-3 hours; controlling the curing temperature at 110-150°C, adjusting the curing time between 2h-6h, curing and drying Get an anti-corrosion coating. The present invention reacts the solid waste and melamine reaction product with epoxy resin to form a soluble polymer with a three-dimensional network structure to cover the metal surface to play an anti-corrosion effect, improving the effective income of industrial production, and at the same time Solve environmental problems.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of waste, and in particular relates to a method for resource utilization of solid waste in industrial production of vitamin B6. Background technique [0002] At present, vitamin B6 is mainly produced through the oxazole process, and the production process is accompanied by serious waste problems. Among them, the Diels-Alder reaction of 4-methyl-5-ethoxyoxazole and 2-isopropyl-4,7-dihydro-1,3-dioxin is the core reaction of the addition process. The by-product of this process is a black paste-like substance that is inflammable and difficult to handle. [0003] At present, this kind of waste is mainly disposed of through burial. Since this waste is a mixture containing many substances harmful to the environment, and it is difficult to be decomposed by the soil, it is desired to treat this waste through waste recycling to achieve green chemistry. Contents of the invention [0004] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/63
CPCC09D5/08C09D163/00C09D7/63C08K5/34922C08K11/005
Inventor 陈金芳王岩廖威翔刘思浩
Owner WUHAN INSTITUTE OF TECHNOLOGY