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Recycling technology of polyhydroxyalkylphosphine and derivants thereof in leather tanning application

A technology of polyhydroxyalkylphosphine and hydroxyalkylphosphine, which is applied in the field of process technology and monitoring of effective substances in the recycling process of polyhydroxyalkylphosphine and its derivatives, can solve the problems of material waste and environmental damage, and achieve Low energy consumption, stable and consistent, easy-to-control effects

Inactive Publication Date: 2009-09-02
RHODIA HENGCHANG (ZHANGJIAGANG) SPECIALTY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no matter what kind of tanning agent will not be completely absorbed by the leather, at the same time, the tanning residue contains a large amount of salt and other substances that have not been absorbed by the leather. If all these substances are discharged, they will not only cause great harm to the environment, but also huge waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A technology for recycling polyhydroxyalkylphosphine and its derivatives in leather tanning applications

[0019] 1. Preparation of polyhydroxyalkylphosphine and its derivative tanning agent tanning initial solution:

[0020] In the initial tanning liquid, a mixture of stabilizer lauryl alcohol polyoxyethylene (9) ether (AEO-9), white sugar, pyrophosphate and preservatives was added, and its consumption was 0.1 of the pickling tare weight; the initial tanning liquid A mixture of buffering agent formic acid and sodium formate is added to the tanning solution, and its dosage is 3% of the pickling tare weight; the initial tanning liquid contains tetrakis hydroxymethyl phosphorus chloride and its polymer with urea, and the concentration is 1% of the pickling tare weight. %;

[0021] 2. Polyhydroxyalkylphosphine and its derivatives tanning agent cycle tanning applications:

[0022] Add pickled hides into the initial tanning solution, rotate for 360 minutes, add ...

Embodiment 2

[0024] Example 2: A technology for recycling polyhydroxyalkylphosphine and its derivatives in leather tanning applications

[0025] 1. Preparation of polyhydroxyalkylphosphine and its derivative tanning agent tanning initial solution:

[0026] A mixture of stabilizer lauryl alcohol polyoxyethylene (9) ether (AEO-9), polyvinyl alcohol, orthophosphorus salt and preservatives has been added to the initial tanning solution, and its consumption is 2% of the pickling tare weight A mixture of buffer formic acid and sodium formate is added to the initial tanning solution, and its consumption is 0.1% of the pickling tare weight; the initial tanning solution contains tetrahydroxypropyl phosphorus chloride and its polymer with urea, and the concentration is 5% of tare weight;

[0027] 2. Polyhydroxyalkylphosphine and its derivatives tanning agent cycle tanning applications:

[0028] Add pickled hides into the initial tanning solution, rotate for 90 minutes, add alkali in stages, and gr...

Embodiment 3

[0030] Example 3: A technology for recycling polyhydroxyalkylphosphine and its derivatives in leather tanning applications

[0031] 1. Preparation of polyhydroxyalkylphosphine and its derivative tanning agent tanning initial solution:

[0032] A mixture of stabilizer lauryl alcohol polyoxyethylene (9) ether (AEO-9), polyethanol, metaphosphate and preservatives was added to the initial tanning liquid, and the consumption was 1% of the pickling tare weight; A buffering agent is added to the initial tanning solution, and its dosage is 1.5% of the pickling tare weight; the initial tanning solution contains tetrahydroxyethyl phosphorus chloride and its polymer with urea, and the concentration is 3% of the pickling tare weight;

[0033] 2. Polyhydroxyalkylphosphine and its derivatives tanning agent cycle tanning applications:

[0034] Add pickled hides into the initial tanning solution, rotate for 230 minutes, add alkali in stages, and gradually increase the pH of the bath to 5-7. ...

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PUM

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Abstract

The invention relates to a recycling technology of polyhydroxyalkylphosphine and derivants thereof in leather tanning application, which comprises the steps of preparing the polyhydroxyalkylphosphine and the tanning initial liquid of a derivant tanning agent thereof; recycling tanning and applying the polyhydroxyalkylphosphine and the derivant tanning agent thereof; and adjusting the tanning agent, pH, a stabilizing agent and the residual liquid of a buffer reagent and ensuring no change of the leather tanning quality; and repeating the steps to lead bath liquid to be used indefinitely. The technology can lead the tanned bath liquid to be recycled indefinitely without sewage discharge, has simple process, low temperature, small energy consumption, is forehanded, environment-friendly and easy for control and the whole course detection in production, and can ensure the stability and consistency of the product.

Description

technical field [0001] The invention relates to a recycling technology of polyhydroxyalkylphosphine and its derivatives in the application of leather tanning, in particular to a process technology and monitoring of effective substances in the recycling process of polyhydroxyalkylphosphine and its derivatives method of environmental protection technology. technical background [0002] The leather industry is one of the heavily polluting industries, especially the leather tanning process. Because most of the tanning agents are poisonous and harmful chemicals. Metal tanning agents, especially chrome tanning agents, have become the most important chemicals in leather tanning today. The annual consumption of basic chromium sulfate as a leather tanning agent reaches 22,000-27,000 tons (equivalent to red alum), and about half of these heavy metals It is discharged (partially processed and landfilled after discharge), and the part absorbed by the leather enters the environment aft...

Claims

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Application Information

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IPC IPC(8): C14C3/08
CPCC14C3/08
Inventor 杨颖颙
Owner RHODIA HENGCHANG (ZHANGJIAGANG) SPECIALTY CHEM CO LTD