CN105669948A - Energy-saving production process of epicholorohydrin-dimethylamine polymer - Google Patents

Abstract

The invention relates to an energy-saving production process of an epicholorohydrin-dimethylamine polymer. The energy-saving production process of the epicholorohydrin-dimethylamine polymer includes: in an airtight stirring reactor, conducting negative pressure feeding on a dimethylamine aqueous solution, and performing low temperature cooling charging on epicholorohydrin; and at the later stage of reaction, using reaction waste heat to perform heat preservation so as to complete the reaction. The energy-saving production process of the epicholorohydrin-dimethylamine polymer provided by the invention optimizes production steps, solves the production hidden dangers, utilizes reaction waste heat to complete synthesis reaction, reduces reaction time, and saves energy.

Description

Epoxychloropropane dimethylamine copolymer energy-saving processing technique

Technical field

The present invention relates to epoxychloropropane dimethylamine copolymer energy-saving processing technique, belong to chemical technology field.

Background technology

Epoxychloropropane dimethylamine copolymer is white to light tan solid, has high-hygroscopicity. Endothermic transition point 32-39 DEG C, heat decomposition temperature 200 DEG C, for important strong cationic polyelectrolytes, linear homopolymer, good water solubility, can mix with arbitrary proportion with water, nonpoisonous and tasteless, stable in properties, pH value is insensitive, there is anti-chlorine Degradation. Additionally, also have the characteristic such as high temperature high voltage resistant and resistance to high speed shear.

US3738945 manufacture method: with dimethylamine and epoxychloropropane for raw material, polymerisation in solution is carried out for solvent with water, its reaction is as follows: equipped with condenser, mechanical agitator, thermometer, in the flask of charging hopper and pH electrode, add 92.5g epoxychloropropane, in charging hopper, add 112.5g dimethylamine agueous solution (40%) simultaneously, start stirring and the time more than 1 hour of the dimethylamine agueous solution in funnel is slowly added in epoxychloropropane, temperature maintains 20 ~ 30 DEG C, then, it is warming up to 50 DEG C, reaction 6h, can obtain including the clear solution of 67% polymer solids.

Though above-mentioned technique is Laboratory Production technique, but commercial production is generally along using this technology, there is the leakage of dimethylamine agueous solution adition process, there is security hidden trouble, and wastes the energy.

Summary of the invention

It is desirable to provide epoxychloropropane dimethylamine copolymer energy-saving processing technique, the method can solve traditional handicraft and there is security hidden trouble, waste energy problem.

Technical scheme is as follows:

1. epoxychloropropane dimethylamine copolymer energy-saving processing technique, it is characterised in that: dimethylamine agueous solution negative pressure charging adds in airtight stirred reactor; Epoxychloropropane feeds in raw material in low-temperature cooling media cool cycles; Epoxychloropropane feeds in raw material the later stage, stops circulating water; Reaction later-stage utilization residual heat of reaction has been incubated reaction.

2. epoxychloropropane dimethylamine copolymer energy-saving processing technique according to claim 1, it is characterised in that: dimethylamine agueous solution negative pressure charging is at gauge pressure about-0.09MPa, is all sucked in airtight stirred reactor by raw material dimethylamine agueous solution.

3. epoxychloropropane dimethylamine copolymer energy-saving processing technique according to claim 1, it is characterized in that: it is that temperature of charge is slowly added in the reactor of stirring when opening lower than the cooling medium circulation system of 45 DEG C, stirred reactor in stirred reactor that epoxychloropropane adds, and carries out copolyreaction with dimethylamine agueous solution.

4. epoxychloropropane dimethylamine copolymer energy-saving processing technique according to claim 1, it is characterised in that: when the addition of epoxychloropropane completes about 80%, close the cooling medium circulation system of stirred reactor and discharge cooling medium in cooler; Then the addition speed improving epoxychloropropane makes reaction temperature be gradually increasing, until epoxychloropropane all adds fashionable reaction temperature at 60-80 DEG C, utilizes residual heat insulation stirring reaction 3-6 hour.

The method have the benefit that

1. in airtight stirred reactor, the charging of dimethylamine agueous solution negative pressure avoids dimethylamine leakage, it is prevented that the dimethylamine leakage harm to operator's health;

2. utilize residual heat of reaction to carry out insulation reaction, eliminate reaction later stage heating step, utilize residual heat of reaction to complete synthetic reaction, decrease the response time, saved the energy.

Detailed description of the invention

Embodiment

In the rustless steel stirred autoclave of 2000L jacketed and interior cooling coil, utilize water ring vacuum pump that reacting kettle inner pressure is evacuated to-0.09MPa, close vacuum pump; Then vacuum state sucks 40% dimethylamine agueous solution 584 kilograms; Opening reacting kettle jacketing and the recirculated water of interior cooling coil, start reactor agitator, be slowly added to the epoxychloropropane of gross weight 480 kilograms with dosing pump, in control reactor, temperature of charge is lower than 45 DEG C; When epoxychloropropane adds about 80%, close the cooling circulating water of reactor and discharge cooler internal recycle water, then improving epoxychloropropane addition and add speed, making reaction temperature be gradually increasing, after making epoxychloropropane all add, reaction temperature is maintained at 65-70 DEG C; Finally, utilize residual heat of reaction insulation reaction 4 hours, obtain the epoxychloropropane dimethylamine copolymer solution that 1060 kilograms of solid contents are 68%.

Claims (4)

1. epoxychloropropane dimethylamine copolymer energy-saving processing technique, it is characterised in that: dimethylamine agueous solution negative pressure charging adds in airtight stirred reactor; Epoxychloropropane feeds in raw material in low-temperature cooling media cool cycles; Epoxychloropropane feeds in raw material the later stage, stops circulating water; Reaction later-stage utilization residual heat of reaction has been incubated reaction.

2. epoxychloropropane dimethylamine copolymer energy-saving processing technique according to claim 1, it is characterised in that: dimethylamine agueous solution negative pressure charging is at gauge pressure about-0.09MPa, is all sucked in airtight stirred reactor by raw material dimethylamine agueous solution.

3. epoxychloropropane dimethylamine copolymer energy-saving processing technique according to claim 1, it is characterized in that: it is that temperature of charge is slowly added in the reactor of stirring when opening lower than the cooling medium circulation system of 45 DEG C, stirred reactor in stirred reactor that epoxychloropropane adds, and carries out copolyreaction with dimethylamine agueous solution.

4. epoxychloropropane dimethylamine copolymer energy-saving processing technique according to claim 1, it is characterised in that: when the addition of epoxychloropropane completes about 80%, close the cooling medium circulation system of stirred reactor and discharge cooling medium in cooler; Then the addition speed improving epoxychloropropane makes reaction temperature be gradually increasing, until epoxychloropropane all adds fashionable reaction temperature at 60-80 DEG C, utilizes residual heat insulation stirring reaction 3-6 hour.