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Catalyst for decomposing heavy components in neopentyl glycol synthesis waste liquid and its preparation method and application

A technology of neopentyl glycol and catalyst, which is applied in the field of catalyst for decomposing heavy components in neopentyl glycol synthesis waste liquid and its preparation, can solve the problems of low conversion rate of ester decomposition, and achieve improved utilization, enhanced alkalinity, The effect of high specific surface area

Active Publication Date: 2021-07-23
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned solid base catalysts all have insufficient basic sites, and the conversion rate for ester decomposition is low.

Method used

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  • Catalyst for decomposing heavy components in neopentyl glycol synthesis waste liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Catalyst Preparation for Decomposing Heavy Components in Neopentyl Glycol Synthesis Waste Liquid

[0054] (1) Weigh Mg(NO 3 ) 2 ·6H 2 O (molecular weight 256) 16.00g, Zr (NO 3 ) 4 ·5H 2 O (molecular weight 429) 3.49g and Al (NO 3 ) 3 9H 2 14.70 g of O (molecular weight 375) was dissolved in 100 mL of deionized water to obtain solution A. Weigh 4.5 g of sodium hydroxide and 12.0 g of sodium carbonate, and dissolve them together in 200 mL of deionized water to obtain solution B.

[0055] (2) Add solution A and solution B dropwise to 100mL deionized water, adjust the dropping rate at any time to stabilize the pH of the solution between 9 and 10, and control the reaction temperature to 50°C. Stir at a rotating speed for 60 minutes.

[0056] (3) Put the stirred mixed solution into a constant temperature tank, age at 70° C. for 16 hours, filter with suction and wash with water until the pH of the filtrate is 7. Dry the filter cake at 60°C for 20h, then put it into ...

Embodiment 2

[0063] Catalyst Preparation for Decomposing Heavy Components in Neopentyl Glycol Synthesis Waste Liquid

[0064] (1) Weigh MgSO respectively 4 (Molecular weight 120) 3.00g, Zr(NO 3 ) 4 ·5H 2 O (molecular weight 429) 6.98g and AlCl 3 ·6H 2 O (molecular weight 241) 9.45g was dissolved in 100mL deionized water together to obtain solution A. Weigh 5.0 g of sodium hydroxide and 13.3 g of sodium carbonate, and dissolve them together in 200 mL of deionized water to obtain solution B.

[0065] (2) Add solution A and solution B dropwise to 100mL deionized water, adjust the dropping rate at any time to stabilize the pH of the solution between 9 and 10, and control the reaction temperature to 40°C. Stir at a rotating speed for 50 min.

[0066] (3) Put the stirred mixed solution into a constant temperature tank, age at 60° C. for 24 hours, filter with suction and wash with water until the pH of the filtrate is 7.

[0067] Dry the filter cake at 60°C for 16h, then put it into a muf...

Embodiment 3

[0073] Catalyst Preparation for Decomposing Heavy Components in Neopentyl Glycol Synthesis Waste Liquid

[0074] (1) Weigh MgCl separately 2 ·6H 2 O (molecular weight 203) 15.23g, Zr (SO 4 ) 2 4H 2 O (molecular weight 355) 8.66g and Al (NO 3 ) 3 9H 2 O (molecular weight 375) 7.35g, dissolve in 100mL deionized water together, obtain solution A. Weigh 3.5g of sodium hydroxide and 9.3g of sodium carbonate, and dissolve them together in 200mL of deionized water to obtain solution B.

[0075] (2) Add solution A and solution B dropwise to 100mL deionized water, adjust the dropping rate at any time to stabilize the pH of the solution between 9 and 10, and control the reaction temperature to 60°C. Stir at high speed for 30 min.

[0076] (3) Put the stirred mixed solution into a constant temperature tank, age at 80° C. for 16 hours, filter with suction and wash with water until the pH of the filtrate is 7.

[0077] Dry the filter cake at 70°C for 16h, then put it into a muffl...

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Abstract

The invention discloses a catalyst for decomposing heavy components in neopentyl glycol synthesis waste liquid and its preparation method and application. Copper carbonate exists in the form of copper carbonate, based on the mass of the catalyst, its percentage composition is MgO 10-30%, ZrO 2 10-30%, Al 2 o 3 10~30%, Cu 2 (OH) 2 CO 3 30-50%. The composite base catalyst of the present invention has two kinds of basic sites, one is derived from MgO, ZrO 2 and Al 2 o 3 and other oxides, and the second is derived from basic copper carbonate, so the catalyst has extremely strong alkalinity, and has a good catalytic effect on the decomposition of ester impurities in the heavy component waste liquid of the neopentyl glycol (NPG) plant to prepare NPG. The decomposition rate of various ester impurities can reach more than 90%, which can effectively improve the economic benefits of the device.

Description

technical field [0001] The invention belongs to the technical field of catalyst and waste liquid treatment, and in particular relates to a catalyst for decomposing heavy components in neopentyl glycol synthesis waste liquid, a preparation method and application thereof. Background technique [0002] Neopentyl glycol (NPG) is a dihydric alcohol with a neopentyl structure, and its molecular symmetrical position has two primary alcoholic hydroxyl groups, which endows neopentyl glycol with good chemical reactivity and also makes it Subsequent products prepared from neopentyl glycol have excellent thermal stability and light resistance, etc. Neopentyl glycol is mainly used in the production of polyester resins, polyurethanes, powder coatings, synthetic lubricants and other fine chemicals. [0003] The production of neopentyl glycol is generally carried out in two steps. First, the aldol addition reaction of isobutyraldehyde (IBA) and formaldehyde under the action of a basic cata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10C02F1/58C02F101/34
CPCB01J23/78B01J35/1004C02F1/58C02F2101/34
Inventor 温达芬孔祥明李江徐艳飞王兰磊国欣常林张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD
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