Preparation process of stannous octanoate

A technology of stannous octoate and preparation process, applied in the chemical industry, can solve the problems of unstable product quality, oxidation of stannous ions, troublesome operation, etc., and achieve the effects of stable quality, reduced reaction conditions and good quality.

Inactive Publication Date: 2012-11-14
JIANGSU DAMING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the reaction process is simple, the temperature in the reaction process is 105-145°C higher, and it is easy to oxidize stannous ions at this time. In order to solve this problem, the

Method used

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  • Preparation process of stannous octanoate
  • Preparation process of stannous octanoate
  • Preparation process of stannous octanoate

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) SnCl Production: 119kg of tin is dropped into the reactor, then 208.6kg of hydrochloric acid solution with a concentration of 35% in mass percent is pumped into the reactor (HCl: Sn molar ratio 2: 1), the temperature rises To reflux state reaction 18 hours, H 2 Use a vent tube to put it high in the air, filter the reaction solution to remove unreacted tin, and filter the filtered SnCl 2 dilute solution (Sn 2+ mass content 10~12%) concentrated to Sn 2+ The mass percentage is 30%; the Sn contained in the solution 2+ It is 117.81kg, and the yield is 99%.

[0022] (2) 170.478kg of sodium bicarbonate is formulated into an aqueous solution of 10% by mass percentage and put into an open reactor, and the SnCl prepared in step (1) is added dropwise at 20°C. 2 solution (NaHCO 3 : SnCl 2 The molar ratio is 2.05:1), the pH value is controlled to 6-6.2 to the end of the reaction, and the reaction solution after the reaction is centrifugally filtered to obtain stannous oxid...

Embodiment 2

[0025] (1) SnCl Production: 119kg of tin is dropped into the reactor, and then 260.71kg is squeezed into the reactor by pumping 260.71kg of 35% hydrochloric acid solution in terms of mass percentage concentration (HCl: Sn molar ratio 2.5: 1), Be warming up to reflux state reaction 19 hours, H 2 Use a vent tube to put it high in the air, filter the reaction solution to remove unreacted tin, and filter the filtered SnCl 2 dilute solution (Sn 2+ mass content 10~12%) concentrated to Sn 2+ The mass percentage is 30%; the Sn contained in the solution 2+ Be 117.929kg, product yield is 99.2%;

[0026] (2) 167.489kg of sodium bicarbonate is formulated into an aqueous solution of 10% by mass percentage and put into an open reactor, and the SnCl prepared in step (1) is added dropwise at 20°C. 2 solution (NaHCO 3 : SnCl 2 The molar ratio is 2.01:1), and the pH value is controlled to 6-6.2 to the end of the reaction, and then the reaction solution after the reaction is centrifugally ...

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Abstract

Belonging to the field of chemical industry, the invention particularly relates to a preparation process of stannous octanoate. The process consists of: putting stannous oxide and isooctanoic acid into a reaction kettle in proportion, actuating stirring and a vacuum pump, carrying out a dehydration reaction at a temperature of 115-130DEG C until no fraction generation, further conducting the reaction for 2-3 hours, then performing cooling and filtering so as to obtain a stannous octanoate end product. The process provided in the invention simply and directly adopts stannous oxide and isooctanoic acid as raw materials for preparation. The used stannous oxide can be obtained through self-preparation and can also be purchased on the market. By using the new process, the prepared product not only has good quality and high purity, but also has low energy consumption and stable quality. Meanwhile, in the whole production process, less waste gas and waste water are generated compared with other preparation methods.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation process of stannous octoate. Background technique [0002] Stannous octanoate, the chemical name is stannous 2-ethylhexanoate, is a light yellow transparent viscous oily liquid, soluble in polyhydric alcohols and most organic solvents, insoluble in monohydric alcohols and water. It is a basic catalyst for the production of polyurethane foam, a catalyst for room temperature curing silicone rubber, polyurethane rubber, and polyurethane coatings, and is widely used in plastic foam products, rubber and other chemical, light industry and other industries. Its chemical properties are unstable and easily oxidized. Its structure is: [0003] [0004] The existing synthesis methods of stannous octoate include aldehyde disproportionation method, acid anhydride method and double decomposition method, and the above methods have problems such as high raw materia...

Claims

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Application Information

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IPC IPC(8): C07C53/128C07C51/41
Inventor 潘小明史广平邵志铭
Owner JIANGSU DAMING TECH
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