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A kind of preparation method of nano organometal carboxylate

A metal carboxylate and nano-organic technology, which is applied in the field of preparation of nano-organic metal carboxylates, can solve the problems of uneconomical, cumbersome lye preparation, low product yield, etc., and achieve reduced product particle size and good environmental protection benefits and the effect of economic benefits

Active Publication Date: 2020-12-15
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The process of preparing calcium carboxylate by traditional methods has basically been on the edge or even eliminated. It can be seen from the above reaction formula that the problems existing in the traditional process mainly lie in: during the preparation process, whether it is CaCl 2 Or NaCl, which is a water-soluble salt, the conversion rate of the material in the reaction process is relatively low; what is more serious is that in the process of preparation of the traditional method, a large amount of raw materials and products are contained in the waste residue generated by the reaction, resulting in product The yield is low, and for the product, the process of its washing is a complex and cumbersome process, and this process is the key to the success of the reaction; in addition, the large amount of high-concentration brine produced after washing Utilization and processing also urgently need to be solved, which is also the biggest problem faced by traditional preparation methods
In the traditional production process of metal organic carboxylates, the washing process is complicated, the lye preparation is cumbersome, dangerous and uneconomical

Method used

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  • A kind of preparation method of nano organometal carboxylate
  • A kind of preparation method of nano organometal carboxylate
  • A kind of preparation method of nano organometal carboxylate

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preparation example Construction

[0027] The preparation reaction equation of nanometer organic metal carboxylate of the present invention is:

[0028]

[0029] Wherein, n=1 or 2,

[0030]

[0031] Wherein, n=1 or 2, M(OH) n It is a metal hydroxide with weaker alkalinity than NaOH and lower solubility in water than NaOH, wherein M is preferably Ca, Mg, Zn;

[0032] or:

[0033]

[0034] Wherein, n=1 or 2,

[0035]

[0036] Wherein, n=1 or 2, wherein, M is preferably Ca, Mg, Zn;

[0037] For example, put (wherein n=1, 2, referred to as carboxylic acid) and caustic soda in the reactor for pre-reaction, control the molar ratio of carboxylic acid and caustic soda in the ratio of 1: (1 ~ 1.2), and add circulating liquid soda to make carboxylic acid Fully react with caustic soda. Add the obtained mixed solution, a certain amount of washing water and metal hydroxide into the beating kettle, beat evenly, then add it to the ball mill, and turn on the ball mill reactor. The frequency is controlled at ...

Embodiment 1

[0042]The raw materials are terephthalic acid, caustic soda, slaked lime and non-ionic surfactant Span-80 (belonging to sorbitan oleate) as examples. The total concentration of circulating liquid alkali is 82.5g / L (calculated as NaOH), the initial addition of caustic soda is calculated according to the molar ratio of terephthalic acid and caustic soda in the chemical reaction stoichiometric number 1:2.3, and the amount of nonionic surfactant is 0.5% of the total mass of raw materials. After the initial reaction is completed, solid-liquid separation is carried out, and the separated filtrate is transferred to a ball mill, and the calculation is carried out according to the molar ratio of sodium terephthalate to slaked lime (82% purity) in the chemical reaction: 1:0.88, and the main reaction is carried out at the frequency of the ball mill at 60Hz process, the reaction time was 180min, and white mud 1 was obtained. After the main reaction is completed, filter again to separate ...

Embodiment 2

[0046] The raw materials are terephthalic acid, caustic soda, slaked lime and TX-10 (belonging to alkylphenol polyoxyethylene ethers) as examples. The total concentration of circulating liquid alkali is 87.6g / L (calculated as NaOH), the initial addition of caustic soda is calculated according to the molar ratio of terephthalic acid and caustic soda in the stoichiometric number of 1:2.3, and the amount of nonionic surfactant is taken as 0.4% of the total mass of raw materials. After the initial reaction is completed, solid-liquid separation is carried out, and the separated filtrate is transferred to a ball mill, and the calculation is carried out according to the molar ratio of sodium terephthalate to slaked lime (80% purity) in the chemical reaction: 1:0.88, and the main reaction is carried out at the frequency of the ball mill at 60Hz process, the reaction time was 180min, and white mud 1 was obtained. After the main reaction is completed, filter again to separate the syste...

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Abstract

The invention discloses a method for preparing nanometer organic metal carboxylates. The invention effectively solves the problems of complicated water washing process, cumbersome preparation of lye, dangerous and uneconomical problems in the traditional production process of metal organic carboxylates. A new technology for preparing high-quality organometallic carboxylates by using carboxylic acid, caustic soda, metal oxide or hydroxide as raw materials and using ball milling method to assist in the reaction. In addition to efficient utilization of liquid caustic soda, the present invention can also obtain high-quality organometallic carboxylate, overcomes the technical prejudice of using salts such as calcium chloride and sodium chloride in the prior art for poor reaction efficiency, and fundamentally solves the problem of The problem of environmental pollution caused by washing waste liquid in the existing process. At the same time, the addition of nonionic surfactants makes ball milling more efficient and significantly reduces the particle size of the product. The invention can bring better environmental benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of organometallic carboxylate preparation, and in particular relates to a preparation method of nanometer organometallic carboxylate. Background technique [0002] Traditional schemes for the preparation of metal carboxylates are based on the following reversible reactions: [0003] [0004] The process of preparing calcium carboxylate by traditional methods has basically been on the edge or even eliminated. It can be seen from the above reaction formula that the problems existing in the traditional process mainly lie in: during the preparation process, whether it is CaCl 2 Or NaCl, which is a water-soluble salt, the conversion rate of the material in the reaction process is relatively low; what is more serious is that in the process of preparation of the traditional method, a large amount of raw materials and products are contained in the waste residue generated by the reaction, resulting in product The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C63/28
CPCC07C51/412C07C63/28C07F1/04C07F3/003C07F3/02C07F3/06
Inventor 陈群陈海群姚大川陆建何明阳方春平王树华易文张莉娜
Owner CHANGZHOU UNIV