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Preparation method of high concentration ferric ammonium ethylene diamine tetraacetate solution

A ferric ammonium ethylenediamine tetraacetate, high-concentration technology, applied in the directions of photography, optics, instruments, etc., can solve the problems of high energy consumption, long reaction time and high cost, and achieve fast reaction, fast preparation speed and low cost. Effect

Active Publication Date: 2006-02-08
GUANGDONG GUANGHUA SCI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long reaction times and large energy consumption of the above three methods, and the raw material FeCl 3 , Fe(OH) 3 and Fe 2 o 3 High cost and their preparation also involves the addition of harmful substances such as HCl, NaOH, etc.

Method used

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  • Preparation method of high concentration ferric ammonium ethylene diamine tetraacetate solution

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Effect test

Embodiment 1

[0023] Take H at a molar ratio of 1:1 4 EDTA and concentrated NH 4 OH (25%) was reacted in a 700w microwave reactor for 5 minutes, the aeration rate was kept at 0.08L / min, and the reaction produced NH 4 h 3 EDTA, then joined with H 4 EDTA and Fe powder with a particle size of 0.08 mm in a microwave reactor and NH 4 h 3 EDTA reacted for 60min to obtain NH with a concentration of 48% 4 solution of FeEDTA.

Embodiment 2

[0025] Take H at a molar ratio of 1:1.1 4 EDTA and concentrated NH 4 OH (25%) was reacted in a 700w microwave reactor for 5 minutes, the aeration rate was kept at 0.06L / min, and the reaction produced NH 4 h 3 EDTA, then joined with H 4 EDTA and Fe powder with a particle size of 0.08 mm in a microwave reactor and NH 4 h 3 EDTA was reacted for 40 minutes to obtain NH with a concentration of 46%. 4 solution of FeEDTA.

Embodiment 3

[0027] Take H at a molar ratio of 1:1.2 4 EDTA and concentrated NH 4 OH (25%) was reacted in a 700W microwave reactor for 5 minutes, the aeration rate was kept at 0.04L / min, and the reaction produced NH 4 h 3 EDTA, then joined with H 4 EDTA and Fe powder with a particle size of 0.12 mm in a microwave reactor and NH 4 h 3 EDTA was reacted for 40 minutes to obtain NH with a concentration of 45%. 4 solution of FeEDTA.

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Abstract

The invention discloses a method for preparing high density amina carboxyl chelating agent ironxam solution, which uses the iron powder as material and the air as oxidant to react in the H4EDTA and the water solution of ammonia on microwave heating catalyst condition to prepare high density EDTA ironxam solution. The method is suit for preparing high density amina carboxyl chelating agent ironxam solution.

Description

technical field [0001] The invention belongs to the technical field of color film flushing, and in particular relates to a method for preparing a high-concentration iron ammonium ethylenediamine tetraacetate solution of bleach used in color film flushing. Background technique [0002] After the color photosensitive material is developed, there are two groups of images composed of metallic silver and dyes on the screen. Only after the silver is bleached can vivid dye images be obtained. For color reversal films, the metallic silver image that appears in the first development (black and white development) is also removed by bleaching. The yellow filter layer of the color photosensitive material is composed of film silver, which also needs to be removed during the bleaching process. [0003] The method of bleaching metallic silver for photography is to oxidize and dissolve it with an oxidizing agent (bleach). Potassium ferricyanide, potassium dichromate, ammonium ferric ethy...

Claims

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Application Information

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IPC IPC(8): G03C7/42
Inventor 郑靭熊亚曾泳艇
Owner GUANGDONG GUANGHUA SCI TECH
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