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Nano-deoxidant composition and its synthesis method

A synthesis method and technology of deoxidizer, applied in chemical instruments and methods, manganese compounds, adsorption purification/separation, etc., can solve problems such as increased cost, increased consumption of polymerization catalyst, insufficient deoxidation depth, etc.

Active Publication Date: 2008-01-09
大连圣迈化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, nickel-based hydrogenation catalysts have to be selected as substitutes for deoxidizers, so there are the following defects: first, the deoxidation depth is not enough, and the oxygen concentration in the raw material after purification is still above 2ppm, which greatly increases the cost of expensive polymerization. Catalyst consumption increases cost and reduces product quality
However, when the activation and regeneration temperature is required to be below 200°C in the polyethylene production process, the deoxidation capacity of the manganese deoxidizer will be reduced, and the application range will be limited.

Method used

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  • Nano-deoxidant composition and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Nano MnCO 3 preparation of

[0027] Reaction formula: MnCO 3 +2HCl→MnCl 2 +CO 2 ↑+H 2 o

[0028] MnCl 2 +2NH 4 HCO 3 → MnCO 3 ↓+2NH 4 Cl+H 2 O+CO 2 ↑

[0029] A: 0.5mol manganese carbonate is added to 30ml water, and hydrochloric acid is added dropwise at a molar ratio of 1:2;

[0030] B: Add 1.0mol ammonium bicarbonate to 250ml water; the molar ratio of manganese carbonate to ammonium bicarbonate is 1:2;

[0031] C: Add 5g polyethylene glycol (surface treatment agent) to 100ml water.

[0032] Put C into a reaction bottle equipped with high-speed stirring (with 2 dropping ports), heat up to 40°C and dissolve completely, add A and B dropwise into C at a constant speed of 1 drop / second, and stir under high speed (100-120 rpm), react at 40°C for 1 hour, filter the resulting white precipitate, wash with deionized water until there is no chloride ion, and spray dry to obtain 30-100 nanometer MnCO 3 .

[0033] Step 2: Synthesis of Nano Deoxidizer

[...

Embodiment 2

[0038] Step 1: Nano MnCO 3 preparation of

[0039] Reaction formula: MnCO 3 +2HCl→MnCl 2 +CO 2 ↑+H 2 o

[0040] MnCl 2 +2NH 4 HCO 3 → MnCO 3 ↓+2NH 4 Cl+H 2 O+CO 2 ↑

[0041]A: 0.5mol manganese carbonate is added to 30ml water, and hydrochloric acid is added dropwise at a molar ratio of 1:2;

[0042] B: Add 1.0mol ammonium bicarbonate to 250ml water; the molar ratio of manganese carbonate to ammonium bicarbonate is 1:2;

[0043] C: Add 3g of polyethylene glycol (surface treatment agent) to 100ml of water.

[0044] Put C into a reaction bottle equipped with high-speed stirring (with 2 dropping ports), heat up to 40°C and dissolve completely, add A and B dropwise into C at a constant speed of 1 drop / second, and stir under high speed (100-120 rpm), react at 40°C for 2 hours, filter the resulting white precipitate, wash with deionized water until there is no chloride ion, and spray dry to obtain 30-100 nanometer MnCO 3 .

[0045] Step 2: Synthesis of Nano Deoxidize...

Embodiment 3

[0050] Step 1: Nano MnCO 3 preparation of

[0051] Reaction formula: MnCO 3 +2HCl→MnCl 2 +CO 2 ↑+H 2 o

[0052] MnCl 2 +2NH 4 HCO 3 → MnCO 3 ↓+2NH 4 Cl+H 2 O+CO 2 ↑

[0053] A: 0.5mol manganese carbonate is added to 30ml water, and hydrochloric acid is added dropwise at a molar ratio of 1:2;

[0054] B: Add 1.0mol ammonium bicarbonate to 250ml water; the molar ratio of manganese carbonate to ammonium bicarbonate is 1:2;

[0055] C: Add 6g of polyethylene glycol (surface treatment agent) to 100ml of water.

[0056] Put C into a reaction bottle equipped with high-speed stirring (with 2 dropping ports), heat up to 40°C and dissolve completely, add A and B dropwise into C at a constant speed of 1 drop / second, and stir under high speed (100-120 rpm), react at 40°C for 3 hours, filter the resulting white precipitate, wash with deionized water until there is no chloride ion, and spray dry to obtain 30-100 nanometer MnCO 3 .

[0057] Step 2: Synthesis of Nano Deoxidiz...

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Abstract

A nano-class deoxidizing agent for selectively removing O2 during the synthesis of polyolefin is prepared through preparing nano-MnCO3 and proportionally adding carrier and assistant. Its advantages are high deoxidizing effect and low regenerating temp.

Description

technical field [0001] The present invention is an important technical invention in the field of polyolefin industry, specifically a nano deoxidizer composition and its synthesis method, which is applied to the production of polyethylene and polypropylene in the petrochemical industry to deeply remove impurity oxygen in ethylene and propylene. , to ensure the normal progress of the polymerization reaction and improve product quality. It can also be used in metallurgy, electronics, light industry and other fields to provide oxygen-free protective gas, carrier gas and reaction gas. Background technique [0002] In the production process of polyethylene and polypropylene, the polymerization catalyst requires deep deoxidation of ethylene and propylene to ensure production. [0003] The difficulty of olefin deoxygenation is that the double bonds in olefins should not be destroyed while deoxygenating. While introducing polyethylene technology, my country also purchased UCC-1101 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04C07C7/12C01G45/00C01B31/24C01B32/60
Inventor 张涛高绪国汪光敏邱长春李景芝梁艳萍
Owner 大连圣迈化学有限公司
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