Method for deacidification in platinum hydrosynthesis process

Abstract

The invention provides a method for deacidification in the platinum hydrosynthesis process. The method comprises the following steps: firstly, chloroplatinic acid hexahydrate and divinyl tetramethyl disiloxane are mixed into a reaction kettle according to the weight ratio being 1:(20 to 100); then nitrogen is introduced to exhaust air, the nitrogen is kept to be continuously introduced, meanwhile,the mixed solution is quickly stirred and heated, and the mixed solution reacts for a period of time; then NaHCO3 is dissolved into deionized water to form a NaHCO3 aqueous solution for standby application; then heating is stopped after a reaction in the reaction kettle is completed, the NaHCO3 aqueous solution under the state of quick stirring is added into the reaction kettle, continuous stirring and dispersing are conducted for a period of time until the mixed solution is cooled; and then after dispersing and cooling are completed, the nitrogen is stopped to be introduced, the aqueous solution and a complex are naturally layered, and the upper-layer complex is taken out and then dehydrated so as to obtain acid-free and anhydrous platinum water. Compared with the prior art, according tothe method, the utilization rate of NaHCO3 can be increased, meanwhile, the nitrogen protection time in the reaction process can be shortened, and thus the nitrogen cost is saved.

Description

technical field [0001] The invention relates to a method for removing acid, in particular to a method for removing acid during platinum hydration synthesis. Background technique [0002] Platinum catalyst can be used as liquid addition silicone rubber, silicone gel, high temperature addition silicone rubber, silicone ink addition type rubber adhesive, and can also be used as a catalyst for the synthesis of polyether silicone oil, amino silicone oil, etc. The synthesis of platinum water is the pre-production process of platinum catalyst. During the preparation of platinum water, tetramethyldivinyldisiloxane and chloroplatinic acid hexahydrate undergo a complex reaction, and a large amount of H2 will be generated during the reaction process. + , usually using NaHCO 3 Neutralize and deacidify it. [0003] The prior art is to use solid NaHCO 3 At the same time, it is added to the synthesis system for acid removal, because NaHCO 3 It cannot be dissolved in the reaction system...

AI Technical Summary

Problems solved by technology

[0003] The prior art is to use solid NaHCO 3 At the same time, it is added to the synthesis system for acid removal, because NaHCO 3 It cannot be dissolved in the reaction system. Although there is a fast dispersion device, there will still be a large number of agglomerated particles in the reaction system, which cannot be fully utilized. Therefore, NaHCO 3 low utilization

And the reaction process needs to be carried out under the protection of nitrogen. If the temperature cannot be cooled quickly at the end of the reaction, the nitrogen protection needs to continue until natural cooling, which will consume a lot of nitrogen.