Process and equipment for continuous production of diphenylguanidine

Abstract

The invention belongs to the technical field of production of rubber accelerators and relates to a production process and equipment for continuously producing diphenylguanidine. The equipment comprises an oxygen buffer tank, an oxygen pipeline, a diphenylthiourea slurry metering pump, a diphenylthiourea slurry pipeline, a catalyst adding device, a heater, an oxidation circulating pump, a primary oxidation reactor, a secondary oxidation reactor, a water washing tank, a discharging pump and the like. The production process is a process for continuously producing diphenylguanidine. Through two-stage oxidation reactions and continuous feeding and discharging, the production process is better than existing processes in the aspects of both technology and economy, continuous production is reallyrealized, and the process realizes energy conservation and consumption reduction and is safe and environmentally friendly.

Description

Technical field [0001] The invention belongs to the technical field of production of rubber accelerators, and relates to a production process and equipment for the continuous production of diphenylguanidine. Background technique [0002] Rubber accelerator DPG, chemical name diphenylguanidine, white powder, non-toxic, but irritating when in contact with the skin. This product is used in natural rubber and synthetic rubber. It is often used as an active agent for thiazole, thiuram and sulfenamide accelerators. It can be used for continuous vulcanization when used together with accelerators DM and TMTD. In neoprene rubber, this product It has the function of plasticizer and peptizer. The use of this product has discoloration, so it is not suitable for white and light-colored rubber products, and rubber products in contact with food. It is mainly used to make tires, rubber sheets, shoe soles, industrial products, hard rubber and thick products. [0003] The traditional production pr...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are as follows: DPG oxidation is a single-pot batch reaction, and the single-pot operation is not only cumbersome, but also has disadvantages such as high cost and unstable quality.

The traditional method needs to use steam to heat up first, and then use water to cool down, and the steam consumes a lot of energy; the equipment is frequently opened, and the power consumption is high; If the production capacity needs to be increased, the only way to increase the equipment is to increase the investment; because the operating conditions of each kettle cannot be completely unified, resulting in unstable quality of the finished product; most of the single-table oxidation kettles used in the traditional process are mechanically sealed, which are easy to leak and cause high temperature and explosion due to friction , poor safety performance

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