Method of treating waste residue in production of neopentyl glycol

A technology of neopentyl glycol and waste residues, applied in the separation/purification of hydroxyl compounds, separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problem of low economic benefits, narrow use range of dark sodium formate residues, environmental pollution, etc. problem, to achieve the effect of high purity, easy realization and simple process

Inactive Publication Date: 2014-01-01
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For the deficiencies in the prior art, the purpose of the present invention is to provide a method for reclaiming high-purity sodium formate and neopentyl glycol from neopentyl glycol production waste residue, which is used to solve the problem of narrow use range, low economic benefit and pollution of dark colored sodium formate residue environmental problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 It is determined that a certain neopentyl glycol production waste residue contains 84% ​​of sodium formate, 6% of neopentyl glycol, and 6% of moisture, and the others are unknown impurities, and the color is brownish black. Utilize the present invention to reclaim high-purity sodium formate and neopentyl glycol method from neopentyl glycol production waste residue: the waste residue is dissolved with water to obtain the sodium formate thick solution of concentration 30%, and the solution successively passes precision filter and ultrafiltration device to remove wherein insoluble matter and The particulate impurities then enter the nanofiltration device for nanofiltration separation, the operating temperature is 40°C, and the operating pressure is 2.5MPa. The nanofiltration permeate is evaporated, concentrated and crystallized to obtain a sodium formate product with a purity of 95.9%. The product is white; the black solid impurities obtained by evaporating and co...

Embodiment 2

[0025] Example 2 It is determined that a neopentyl glycol production waste residue contains 81% sodium formate, 6% neopentyl glycol, and 8% moisture, and the others are unknown impurities, black. Utilize the present invention to reclaim high-purity sodium formate and neopentyl glycol method from neopentyl glycol production waste residue: the waste residue is dissolved with water to obtain the sodium formate rough solution of concentration 40%, and the solution successively passes precision filter and ultrafiltration device to remove wherein insoluble matter and The particulate impurities then enter the nanofiltration device for nanofiltration separation. The operating temperature is 45°C and the operating pressure is 2.3MPa. The nanofiltration permeate is evaporated, concentrated, and crystallized to obtain a sodium formate product with a purity of 95.5%, which is white crystals; the black solid impurities obtained by evaporating and concentrating the nanofiltration concentrate...

Embodiment 3

[0026] In Example 3, it was determined that a neopentyl glycol production waste residue contained 84% sodium formate, 5% neopentyl glycol, and 8% moisture, and the others were unknown impurities. Utilize the method for processing neopentyl glycol production waste residue of the present invention, the steps are as follows: (1) neopentyl glycol production waste residue is dissolved in water to obtain crude sodium formate solution, and the concentration of the crude sodium formate solution is controlled to be 10%; (2) the crude sodium formate solution is subjected to precise The filter and ultrafiltration device filter to remove particulate impurities. The molecular weight cut-off of the ultrafiltration membrane is 2000, and the ultrafiltration temperature is 20°C; (3) The solution after removing particulate impurities enters the nanofiltration system for nanofiltration separation. The molecular weight is 150, the operating temperature during nanofiltration separation is 20°C, and...

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PUM

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Abstract

The invention provides a method of treating waste residue in production of neopentyl glycol. The method comprises the following steps: (1) dissolving waste residue in production of neopentyl glycol, with water to obtain a rough sodium formate solution; (2) filtering the rough sodium formate solution through a precise filter and an ultrafilter so as to remove particle impurities; and (3) carrying out nanofiltration and separation on the particle impurity-removed solution through a nanofiltration system, wherein high-purity sodium formate and neopentyl glycol in the obtained nanofiltration permeate and nanofiltration concentrate can be recovered. The purity of the sodium formate is high and can achieve more than 95%. The process water can be recycled, thus the resource waste and retreatment problems cannot be caused. Useful solutes in the waste residue can be entirely recovered, and impurities can serve as fuels for generating heat. The method is simple in technique by adopting a membrane separation technology, and easily realized industrially.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and relates to a method for purifying sodium formate, a by-product of neopentyl glycol, in particular to a method for separating and purifying sodium formate, a by-product of neopentyl glycol production, using membrane separation technology. Background technique [0002] Neopentyl glycol is the raw material for the production of polyester resin, unsaturated polyester resin, powder coating, photosensitive coating, polyurethane resin and alkyd resin. The resin coating made has good chemical stability, gloss retention and weather resistance It has the advantages of high stability, thermal stability and chlorine corrosion resistance. In addition, neopentyl glycol can also be used in the production of medicines, solvents, and plasticizers, and its uses are very extensive. The annual output of neopentyl glycol in my country is about 100,000 tons, and the route of isobutyraldehyde is mostly used. In the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/06C07C51/47C07C31/20C07C29/76
CPCC07C29/76C07C51/42C07C53/06C07C31/20
Inventor 韩晓莉王文华冯咏梅李云飞吕洪涛王娇娇常秀莲
Owner YANTAI UNIV
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