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Catalyst for transferring the carbon tetrachloride into chloroform and preparation method thereof

A technology of carbon tetrachloride and catalyst, applied in the field of high-efficiency catalyst and its preparation, can solve unsatisfactory problems, achieve high selectivity, reduce by-products, and long life

Active Publication Date: 2013-04-10
JIANGSU LEE & MAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the prior art, catalysts for converting carbon tetrachloride into chloroform by hydrodechlorination are not satisfactory in terms of catalyst activity, lifetime and selectivity.

Method used

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  • Catalyst for transferring the carbon tetrachloride into chloroform and preparation method thereof
  • Catalyst for transferring the carbon tetrachloride into chloroform and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The raw material that present embodiment adopts is:

[0035] With 5g of trilobal active γ-alumina as the carrier, its average diameter is 1.5-12.5mm, the specific surface area is 110-220 square meters per gram, and the average pore diameter is about 50-125

[0036] With 67.5mg chloroplatinic acid (H 2 PtCl 6 ) as a precursor of the active component platinum, wherein the platinum content is 37%, equivalent to 25 mg of platinum; and

[0037] Using 111mg manganese acetate (Mn(AC) 2 4H 2 O) As manganese salt, which corresponds to 25 mg manganese.

[0038] During preparation, manganese acetate is dissolved in deionized water to prepare 2 to 2.5ml of manganese acetate solution, and then the manganese acetate solution is evenly sprayed or added dropwise to the carrier (the carrier can be dried first), and then heated at 120°C Drying at 500°C for 2 hours in a muffle furnace to obtain catalyst precursor I.

[0039] Dissolve chloroplatinic acid in deionized water to prepa...

Embodiment 2

[0046] The raw material that present embodiment adopts is:

[0047] With 5g of trilobal active γ-alumina as the carrier, its average diameter is 1.5-12.5mm, the specific surface area is 110-220 square meters per gram, and the average pore diameter is about 50-125

[0048] With 67.5mg chloroplatinic acid (H 2 PtCl 6 ) as a precursor of the active component platinum, wherein the platinum content is 37%, equivalent to 25 mg of platinum; and

[0049] Using 55mg manganese acetate (Mn(AC) 2 4H 2 O) as a manganese salt, equivalent to 12.5 mg manganese;

[0050] During preparation, manganese acetate is dissolved in deionized water to prepare 2 to 2.5ml of manganese acetate solution, and then the manganese acetate solution is evenly sprayed or added dropwise to the carrier (the carrier can be dried first), and then heated at 120°C Drying at 500°C for 2 hours in a muffle furnace to obtain catalyst precursor I.

[0051] Dissolve chloroplatinic acid in deionized water to prepare 2...

Embodiment 3

[0057] The raw material that present embodiment adopts is:

[0058] With 5g of trilobal active γ-alumina as the carrier, its average diameter is 1.5-12.5mm, the specific surface area is 110-220 square meters per gram, and the average pore diameter is about 50-125

[0059] With 67.5mg chloroplatinic acid (H 2 PtCl 6 ) as the precursor of active component platinum, wherein the platinum content is 37%, equivalent to 25mg platinum;

[0060] Using 111mg manganese acetate (Mn(AC) 2 4H 2 O) As manganese salt, which corresponds to 25 mg manganese; and 18.3 mg potassium chloride (KCl), which corresponds to 9.6 mg potassium.

[0061] During preparation, manganese acetate is dissolved in deionized water to prepare 2 to 2.5ml of manganese acetate solution, and then the manganese acetate solution is evenly sprayed or added dropwise to the carrier (the carrier can be dried first), and then heated at 120°C Drying at 500°C for 2 hours in a muffle furnace to obtain catalyst precursor I....

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Abstract

The invention relates to a high-efficiency catalyst for the hydrogenation and the dechlorination of carbon tetrachloride to transform the carbon tetrachloride into chloroform, and a preparation method thereof. The catalyst takes metal Pt as a main catalytic active ingredient which is added with Mn as a cocatalyst, uniformly dispersed on a gamma-Al2O3 carrier and can effectively promote the conversion rate of the catalyst and the activity and stability of the catalyst. Under the condition that the productivity is kept to be that each gram of the catalyst can catalyze 15g of the carbon tetrachloride every day, the catalyst can be operated for 200d continuously, with the conversion rate and the selectivity maintained to be over 90 percent and 80 percent respectively.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, more specifically, the invention relates to a high-efficiency catalyst for converting carbon tetrachloride into chloroform by hydrodechlorination and a preparation method thereof. Background technique [0002] Methane chloride is an important raw material, and China imported about 300,000 tons in 2003 alone. At present, the capacity of domestic methane chloride installations is also increasing, and there are already methane chloride enterprises with an output of more than 100,000 tons per year. Carbon tetrachloride is a by-product of the production of methane chloride by the cogeneration method, and the output of carbon tetrachloride as an accompanying product in the production process of methane chloride is also on the rise. [0003] According to the "Montreal Protocol on Substances that Deplete the Ozone Layer", carbon tetrachloride, as an ozone depleting substance (ODS), will be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/656C07C19/04C07C17/23
Inventor 陈新滋黎星术贾振华陈刚贾青郑彤
Owner JIANGSU LEE & MAN CHEM