Toluene
Core Equipment
Production Equipment: Catalytic reforming reactor, alkylation reactor, rectification tower, raw material pretreatment device. Storage and Transportation Equipment: Sealed storage tank, explosion-proof transfer pump, sealed valve. Application Equipment: Solvent blending tank, reaction kettle, tail gas recovery device.Mainly including catalytic reforming, benzene alkylation, precision rectification, safe storage and transportation, and tail gas recovery technologies to ensure quality, efficiency and safety.
Product Introduction
Toluene (chemical formula C₇H₈) is a homologue of benzene, derived from petroleum catalytic reforming, coal coking and other processes. It has good solubility and chemical activity, and is widely used in chemical industry, solvents, medicine and other fields. This article briefly introduces its core information with Chinese-English comparison throughout.
Types and Characteristics of Equipment
Type
Petroleum Toluene: Mainstream industrial type, large output and high purity (accounting for more than 80% of the world), used in chemical synthesis and high-end solvents. Coking Toluene: By-product of coal coking, low purity (95%-98%), needs refining, mostly used in low-end solvents and coating dilution. High-Purity Toluene: Purity ≥99.95%, used in high-end fields such as pharmaceutical intermediates and electronic chemicals. Industrial Toluene: Purity 99.0%-99.9%, most widely used, applied in coatings, pesticides, chemical synthesis, etc. Crude Toluene: Purity ≤95%, high impurities, needs refining before use, rarely used directly.
Features
Physical Properties: Colorless transparent aromatic liquid at room temperature, insoluble in water, soluble in organic solvents, flammable and volatile. Chemical Properties: Easy to undergo substitution reactions, difficult to undergo addition reactions, less toxic than benzene, a common alternative solvent for benzene. Safety: Flammable and explosive, slightly toxic, explosion-proof, ventilation and protective measures are required during operation.
Toluene
Toluene is a clear, flammable liquid aromatic hydrocarbon.
Basic Principles and System Composition
Basic Working Principle
Production Principle: Mainstream methods are petroleum catalytic reforming (naphtha as raw material) and benzene alkylation (benzene + methanol as raw material) to produce toluene of different purity. Application Principle: Used as a solvent for dilution and cleaning; used as a raw material to prepare downstream chemical products through substitution reactions.
Overall System Composition
Production Unit: Including raw material pretreatment, reactor and rectification tower to process qualified toluene. Storage Unit: Special sealed storage tank, controlling temperature, explosion-proof and leak-proof, stored separately. Transportation Unit: Explosion-proof pump and special pipeline, controlling flow, with anti-static and explosion-proof measures. Application Unit: Solvent blending tank, reaction kettle, etc., with supporting tail gas recovery device.
Basic Principles and System Composition
Raw Material Pretreatment: Dehydrate and remove impurities from raw materials, send to production device after passing inspection. Production and Processing: Generate crude toluene through reaction, rectify and purify, test qualified, then send to storage unit. Storage Operation: Store in special storage tank, control temperature, take explosion-proof and anti-static measures, and check regularly. Transportation Operation: Transport with explosion-proof pump and special pipeline, control flow, strictly prevent leakage. Application Operation: Blend concentration before use, turn on ventilation and tail gas recovery, and do a good job in personnel protection. Safe Disposal: Recover residual/waste toluene, standardize treatment of leaks, and do equipment maintenance.
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