A kind of halogenated butyl rubber with low halogen salt content and preparation method thereof
A halogenated butyl rubber, content technology, applied in the field of halogenated butyl rubber, can solve the problems of high centrifuge requirements, high price, bulky centrifuge, etc., and achieve the effect of less equipment investment, good separation effect and better separation effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0045] A kind of halogenated butyl rubber with low halogen salt content and preparation method thereof
[0046] The unsaturation is that the isobutylene-isoprene copolymer (Yanshan Petrochemical, IIR1751) of 1.7mol% is dissolved in hexane (Jingbo Petrochemical, the purity of n-hexane is 85wt%) to obtain a glue solution with a concentration of 10wt%, and the temperature is raised to After 40°C, add bromine (Albemarle) into the reactor at a flow rate of 17.3g / h at a flow rate of 4kg / h;
[0047] After the bromination reaction is completed, the glue enters the neutralization reactor. The flow rate of the aqueous sodium hydroxide solution with a concentration of 0.17wt% is 2.7kg / h. When neutralizing, the water phase content is 40.3wt% of the glue. The value is 7.75;
[0048] The oil-water mixture then enters the oil-water static separation tank, and after the oil-water is initially separated, the bromine-containing salt wastewater is discharged;
[0049] The oil phase with a wate...
Embodiment 2～7
[0057] The details of the specific operation in Examples 2-7 are the same as in Example 1, except that the concentration of the IIR glue is changed. In addition, in order to adjust the pH value of the water phase after neutralization, the concentration and flow rate of the lye used for neutralization are adjusted. In order to compare the effects of different washing fresh water dosages, the fresh water dosages for glue washing after neutralization, the fresh water dosages for washing colloidal particles, and the NaBr content in the final product are shown in Table 1.
[0058] Table 1 Analysis data of each point
[0059]
[0060] *The content of sodium bromide in the product is converted from the sodium content obtained by plasma emission spectrometry. 1 mol of sodium corresponds to 1 mol of sodium bromide. The sodium in the product mainly exists in the form of sodium bromide. For the convenience of calculation, it is assumed that all the sodium exists in the product in th...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More