Preparation method of dibutyltin dilaurate

A technology of dibutyltin laurate and dibutyltin dichloride, which is applied in the direction of tin organic compounds, can solve the problems of toxic dust, high processing cost, waste of energy, etc., and achieve easy handling, high salt content, and low energy consumption consumption effect

Pending Publication Date: 2019-05-31
南通濠泰化工产品有限公司
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Problems solved by technology

Finally, the product needs to be obtained through centrifugation. During the centrifugation process, a large amount of waste water will be generated, and the salt content in the waste water is low, the water volume is large, the treatment cost is high, and the pre-reaction is a format reaction, and the toxic waste produced by step-by-step processing There is a lot of dust, there is a big safety hazard, and continuous heating is required during the reaction process, which wastes a lot of energy

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  • Preparation method of dibutyltin dilaurate

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[0013] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0014] see figure 1 The process flow diagram, this specific embodiment discloses a kind of dibutyltin dilaurate preparation method, comprises the steps: (1) in reaction vessel, add dibutyltin dichloride and lauric acid mixture and fully mix; Feasible , in this specific example, can take by weighing 304g dibutyl tin dichloride and 650g the lauric acid mixture that contains the lauric acid of 60% by weight and place in the multi-port reaction bottle of 2L capacity, adopt ...

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Abstract

The invention discloses a preparation method of dibutyltin dilaurate. The preparation method comprises following steps: (1) adding dibutyltin dichloride and lauric acid into a reactor, and fully mixing dibutyltin dichloride and lauric acid; (2) dropwise adding a sodium hydroxide solution into the mixture of dibutyltin dichloride and lauric acid during the mixing process; (3) after the addition ofthe sodium hydroxide solution, fully carrying out reactions, and allowing the system to stand still to carry out layering; and (4) separating and discharging the upper layer namely dibutyltin dilaurate. The preparation method has the advantages that the heat generated by alkaline hydrolysis of dibutyltin dichloride is fully utilized, thus the energy consumption is effectively reduced, the synthesis cost is reduced, moreover, the salt content of generated wastewater in one step reaction is high, the wastewater is easy to process; a mixture of lauric acid and coconut acid is taken as the reaction raw material, has a low melting point, and is easy to feed in autumn and winter; the excess unreacted raw material is easy to separate, and the preparation cost is effectively reduced.

Description

technical field [0001] The invention relates to the synthesis of organotin, in particular to a preparation method of dibutyltin dilaurate. Background technique [0002] Dibutyltin dilaurate has excellent transparency, lubricity, and weather resistance. It is suitable for soft transparent PVC products. After processing, the surface gloss and transparency of the finished product are good, and there is no vulcanization pollution. With excellent light stability and transparency, it can be used as a stabilizer for polyvinyl chloride and is widely used. In the prior art, enterprises generally use dibutyltin dichloride to hydrolyze in caustic soda solution to obtain dibutyltin oxide and dehydration condensation with lauric acid to dibutyltin dilaurate. Finally, the product needs to be obtained through centrifugation. During the centrifugation process, a large amount of waste water will be generated, and the salt content in the waste water is low, the water volume is large, the tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/22
Inventor 姜盼盼刘美芳
Owner 南通濠泰化工产品有限公司
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