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Ketoside solid waste recycling method

A technology for solid waste and treatment method, applied in the field of industrial waste resource utilization, can solve problems such as affecting environmental sanitation, polluting the atmosphere, polluting water bodies, etc., and achieves the effects of reducing pollution, easy operation and low production cost

Inactive Publication Date: 2017-10-24
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these solid wastes are difficult to be directly used in industry, they accumulate in large quantities, occupying land, polluting the air, polluting soil, affecting environmental sanitation, and even polluting water bodies, and also causing a great waste of resources.

Method used

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  • Ketoside solid waste recycling method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for recycling ketone glycoside solid waste, comprising the steps of:

[0026] 1) Add 250 kg of solid waste to a 3000L reactor, then add caustic soda solution (made by dissolving 64Kg sodium hydroxide flake alkali in 2000 L water) and stir until completely dissolved, heat, control the reaction temperature to about 70°C, and react When the pH is 10~11 (about 30min), the reaction solution I is obtained. During the reaction, p-chlorobenzoic acid generates sodium p-chlorobenzoate, and p-chlorobenzaldehyde undergoes disproportionation reaction to generate sodium p-chlorobenzoate, p-chlorobenzyl alcohol, and p-chlorobenzyl alcohol. Methyl benzoate undergoes a hydrolysis reaction to generate sodium p-chlorobenzoate and methanol;

[0027] 2) Control this temperature condition, and under the condition that the degree of vacuum is not greater than -0.09 MPa, distill until no fraction is produced to obtain product II methanol and mother liquor III;

[0028] 3) Add the com...

Embodiment 2

[0032] A method for recycling ketone glycoside solid waste, comprising the steps of:

[0033] 1) Add 70 kg of solid waste to a 1000L reactor, then add caustic soda solution (made by dissolving 20Kg of sodium hydroxide in 600 L of water) and stir until completely dissolved, heat, control the reaction temperature to about 62°C, and react to pH 10~11 (about 25min) to obtain the reaction solution I. During the reaction process, p-chlorobenzoic acid generates sodium p-chlorobenzoate, and p-chlorobenzaldehyde undergoes disproportionation reaction to generate sodium p-chlorobenzoate, p-chlorobenzyl alcohol, and p-chlorobenzoic acid. Methyl ester undergoes hydrolysis reaction to generate sodium p-chlorobenzoate and methanol;

[0034] 2) Under the condition that the degree of vacuum is not greater than -0.09 MPa, distill at about 70°C until no fraction is produced to obtain product II methanol and mother liquor III;

[0035] 3) Add the composite oxidant (the amount of the composite ox...

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Abstract

The invention relates to a ketoside solid waste recycling method which specifically comprises the following steps: 1) dissolving solid wastes in a caustic soda solution, and reacting at the temperature of 60-70 DEG C until the pH value is 10-11 so as to obtain a reaction solution I; 2) distilling the reaction solution I at the temperature of 75+ / -5 DEG C under the vacuum degree of not more than -0.09MPa until any fraction is not produced, thereby obtaining a product II and a mother solution III; 3) adding a composite oxidant into the mother solution III, carrying out an oxidizing reaction at the temperature of 40-45 DEG C for 2.0-3.0 hours, performing immediate filtration in vacuum, and taking the filtrate V; and 4) adding hydrochloric acid into the filtrate V under stirring conditions until the pH value is 5-6, continuously stirring and reacting for 30 minutes or more, performing suction filtration to obtain the filter residue VI, drying the filter residue VI, thereby obtaining the crude parachlorobenzoic-acid. The method has the advantages that the ketoside solid wastes are recycled, the recycled product is high in economic value, the production cost is reduced, environmental pollution is avoided in the whole production process, and the method is a green chemical process. Moreover, the parachlorobenzoic-acid product recycled from the solid wastes is stable and reliable in quality and high in purity and has excellent economic benefits.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial waste, and in particular relates to a method for resource recovery of ketone glycoside solid waste. Background technique [0002] In this method, the ketoglycoside is prepared from D-ribose as a starting material through reactions such as hydroxymethylation, condensation, esterification, coupling, and hydrolysis. This process produces a large amount of solid waste (for example, the production of 1 ton of ketone glycosides produces about 3.5 tons of solid waste). Because these solid wastes are difficult to be directly used in industry, they accumulate in large quantities, occupying land, polluting the air, polluting soil, affecting environmental sanitation, and even polluting water bodies, and also causing a great waste of resources. Ketoglycoside solid waste contains p-chlorobenzaldehyde and p-chlorobenzoic acid. If they are recycled, not only the investment is small, b...

Claims

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Application Information

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IPC IPC(8): C07C27/02C07C51/00C07C51/16C07C51/285C07C51/295C07C63/70C07C51/41C07C29/00C07C29/14C07C33/46
CPCC07C29/00C07C29/14C07C51/00C07C51/09C07C51/16C07C51/285C07C51/295C07C51/412C07C63/70C07C33/46
Inventor 张凌卢明华曹红霞吴慧敏胡卫平冯彩霞种瑞峰刘亚珍王广李德亮
Owner HENAN UNIVERSITY
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