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Preparation method of copper ethylenediamine

A technology for copper ethylene diamine and ethylene diamine, which is applied in the field of preparation of copper ethylene diamine, can solve the problems of long preparation time of copper ethylene diamine, time-consuming and laborious, and the solution is difficult to meet requirements, so as to shorten the preparation period and reduce the cost. , the effect of avoiding the loss of copper

Active Publication Date: 2013-03-13
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it takes a long time to prepare copper ethylenediamine. According to the existing copper ethylenediamine configuration method and steps, it takes at least 7 days
Any mistakes in the preparation process will make it difficult for the prepared solution to meet the requirements, so it is necessary to start all over again, which is time-consuming and laborious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] 1) Weigh 98g (1 mol) of copper hydroxide into a 2000ml beaker, add 2000g of distilled water, and place it to settle the copper hydroxide; 2) After the copper hydroxide settles, wash the precipitate 4 times by decanting; 3) Finish washing The paste-like precipitate is retained, and then the paste-like precipitate is cooled to below 10°C; 4) 120 grams of ethylenediamine with a purity of 99% and a density of 0.898g / cm3 are added to the paste-like precipitate under vigorous stirring to make the ethylene The molar ratio of diamine to copper hydroxide is 2:1, and the volume of ethylenediamine added is 133.6ml; 5) Then it is diluted with distilled water to a volume of 801.6ml, and the final volume of the diluted mixture is the added ethylenediamine. 6 times the volume of the amine solution; 5) After placing the prepared solution in a brown bottle with a stopper for 2 days, filter it with a siphon method or filter, measure the volume of the filtrate and place it in a brown bottle...

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PUM

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Abstract

The invention relates to a preparation method of copper ethylenediamine, particularly to a method for rapid preparation of copper ethylenediamine. The invention improves the process of preparing copper ethylenediamine from copper sulfate, so that the preparation cycle is shortened compared to original technologies. At the same time, the invention greatly reduces the relevant influencing factors of a copper ethylenediamine preparation process, thus substantially enhancing the preparation success rate of copper ethylenediamine.

Description

Technical field [0001] The invention relates to a method for preparing copper ethylene diamine, in particular to a method for rapidly preparing copper ethylene diamine by using copper hydroxide. Background technique [0002] Pulp viscosity is mainly used to characterize the average length of cellulose molecular chains. Pulp viscosity can not only indirectly indicate the degree of degradation and destruction of cellulose in the process of cooking and bleaching, but also can further evaluate the physical properties of the pulp. Therefore, it is of great significance to determine the viscosity of pulp. A capillary viscometer is usually used to measure the viscosity of pulp. Before the measurement, first select a suitable solvent to dissolve the cellulose material, and then use the formed cellulose solution for measurement. In the past, copper ammonia solution was used as the solvent, but due to its disadvantages such as difficulty in preparation, instability, and oxidative degrada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00
Inventor 陈彬吕卫军
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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