Cradle to Consumer
Identity ID
6b8d401c-c0a2-4b7a-a203-9cb09500aa45
Materials
Associated ID
1a715be0-c1bb-425c-b090-0b820c8f7b93
Included activities starts
Included activities ends
Description
This dataset is a market dataset representing the consumption market of the region. The dataset includes the transport of the product from the gate to the consumption end, and the transport service is calculated based on the transport situation of the product in the region. Long-chain chlorinated paraffin is widely used in plastics, cables, flooring materials, hoses, artificial leather and rubber products, and can also be used as an additive for coatings, lubricating oils, etc. Long-chain chlorinated paraffin is modeled as a pure substance, and when modeling this substance the user needs to add a solvent of their choice in the model; this dataset includes the main raw and auxiliary materials, energy and air emissions of the production process, where the waste gas treatment process is included within the dataset boundary, and infrastructure such as production equipment manufacturing and plant construction is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activity of this product includes liquid chlorine vaporization, chlorination reaction, crude product refining, tail gas treatment and other process steps.
Activity Description
The production activities of this product include liquid chlorine gasification, chlorination reaction, crude product refining, tail gas treatment and other processes.
Process Description
Long-chain chlorinated paraffin is a mixture of n-alkanes with 18-28 carbon atoms obtained through the chlorination reaction. It has no fixed single chemical formula, CAS number 85535-86-0, and is usually a light yellow to amber viscous liquid. Some products with high chlorination degree are semi-solid, have no obvious odor, and have good compatibility and stability. Insoluble in water, easily soluble in mineral oil, aromatic hydrocarbons, esters and other organic solvents, and has good compatibility with polymer materials such as rubber and plastics. It has stable chemical properties, acid resistance, alkali resistance, oxidation resistance, outstanding flame retardant properties, and can maintain good fluidity at low temperatures. The degree of chlorination (chlorine mass fraction) is usually between 40% and 70%. The higher the degree of chlorination, the stronger the flame retardancy and oil resistance. Long-chain chlorinated paraffins are mainly used in the field of plastic processing (as plasticizers and flame retardants), the rubber industry (as softeners and flame retardant additives); they are also used in coatings and adhesives (as flame retardant plasticizing components), metal processing (as additives for cutting oils and hydraulic oils to enhance lubricity and extreme pressure properties). They can also be used for textile flame retardant finishing, waterproof material modification, and as integrated flame retardant and plasticizing additives in wires, cables, building materials and other fields.
Time period
2017
2026
Geography
China,Hunan
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The photothermal chlorination combined method is the mainstream modification technology for the production of long-chain chlorinated paraffin. It synergistically promotes the chlorination reaction of paraffin hydrocarbons through ultraviolet light initiation and heating, shortens the production cycle and has a high chlorine gas utilization rate. Its application share in the domestic long-chain chlorinated paraffin market is gradually increasing, and it is an important upgrade direction for the intermittent chlorination process. This data set represents the mainstream technology: using heavy liquid paraffin and chlorine as the main raw materials for chlorination reaction to produce chlorinated paraffin products, using an intermittent production process that combines thermal chlorination and photochlorination. The production process of the project can be mainly divided into four sections: liquid chlorine gasification, chlorination reaction, crude product refining, and tail gas treatment. All sections are completed in closed reactors and pipelines, and waste treatment is included. The chlorine vaporization heat source is the circulating water cooled below 40°C in the cooling water system of the reactor as the liquid chlorine vaporization heat source.
1. Liquid chlorine gasification: Liquid chlorine is sent into the liquid chlorine vaporizer. During the startup stage, the liquid chlorine is heated and vaporized into chlorine gas through indirect heat exchange with steam, and then enters the chlorine gas buffer tank with a pressure of 0.1-0.2MPa.
2. Chlorination reaction: The liquid paraffin is pumped from the metering tank into the main reaction kettle of the chlorination reaction through a pipeline pump, and the jacket of the main kettle is fed with circulating cooling water. Under fluorescent lamp lighting conditions, the main kettle tail gas (hydrogen chloride and a small amount of chlorine) enters the auxiliary kettle, and the chlorine in the tail gas undergoes a shallow chlorination reaction with the liquid paraffin. The reaction pressure is slightly positive pressure and the reaction temperature is 20-28°C. The materials after pre-chlorination are pumped into the main reaction kettle. Under fluorescent lighting conditions, the main reaction kettle begins to slowly introduce chlorine gas to cause chlorination reaction. The chlorination reaction is completed after the sampling test is qualified. The reaction produces crude chlorinated paraffin, which is pressured into the refining kettle by air and transferred to the crude product refining section. The tail gas (chlorine and a small amount of chlorine) from the reaction process is piped into the secondary reaction kettle for pre-chlorination of the next batch.
3. Crude product refining (degassing): Dry air from the compressed air storage tank is sent through the filter and from the lower part of the refining kettle. The air enters the refining kettle to take out the dissolved hydrogen chloride gas and free chlorine in the crude product. The residual hydrogen chloride and chlorine are blown away with clean and dry air pressure. The air pressure of the crude wax refining kettle is generally controlled at around 0.1Mpa. When the acid value of the material no longer decreases with the extension of the air blowing time, stop venting the air and take samples for testing; after the acid value of the finished product in the refining kettle drops to 0.05mgkOH/g, continue to stir with compressed air to fully mix it to the process requirements.
4. Exhaust gas treatment.