In September, the domestic printing and dyeing industry entered the traditional “golden nine and silver ten” peak season. Driven by both rising prices of upstream raw materials and increasingly strong demand from downstream industries such as the textile industry, the disperse dyestuff market has begun to rebound, with prices rising in early August and then again in September. Numerous dyestuff companies have revealed that they are on the verge of raising their prices.

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According to the source, the leading dyestuff company, mit-ivy industry company, is now offering 32,000 yuan per ton for major disperse dyestuffs, up from the lowest price of 22,000 yuan in the first half of this year. There is a general feeling in the industry that the upward price channel in the dye market has been opened.

It is predicted that in the fourth quarter of 2020, although the demand in the dye market is no better than in previous years, it is expected to improve significantly compared to the first three quarters. As the epidemic continues to improve, orders from printing and dyeing factories will increase, and the trend is for printing and dyeing factories to replenish their inventories and purchase on demand.

In the first half of September, the main origin of Zhejiang and Jiangsu dispersed black ECT300% market mainstream offer at about 32 yuan/kg, the actual single negotiation at 27-28 yuan/kg; Guangdong, Fujian region to negotiate the price of 32 yuan/kg near.

A number of dyestuff enterprises pointed out that due to the price increase of the core intermediate of dyestuff, the price of the main varieties of disperse dyestuff has increased to 32,000 yuan/ton, but the transaction price has not yet reached, mainly because the old orders have to be executed according to the previous price. Although there are some price increases, compared with the historical cycle, the price from the beginning of the year to the first half of the year is at a low level in the past two or three years, so after several rounds of price increases, the price is now only at a moderate level. This year’s low prices are between 22,000 and 23,000 per tonne transaction price.

At present, the only domestic manufacturers producing IEDs are Mit-ivy Industry company and east ivy chemical company, and east ivy chemical company is required to stop production in July due to safety management problems, and complete the rectification and acceptance before October 9. and then resume production after subsequent approvals have been passed, only Mit-ivy Industry Company, which produces the dye intermediate meso-phenylenediamine, holds more than 99% of the market share, exacerbating the shortage of market supply.

Since July this year, the price of M-Phenylenediamine has risen to 70,000 yuan per ton, or more than 15%. In recent years, the price per tonne of M-Phenylenediamine has reached a high of 150,000 yuan, and there still seems to be room for price increases.

Now, as downstream demand is gradually recovering and the prices of upstream raw materials such as is-phenylenediamine, cobalt chloride and cobalt sulfate are rising, the rising costs have spurred a number of dye manufacturers to raise their prices. Prices of disperse dyes are now at a high level, but they are still at a low to moderate level compared to historical prices. The price adjustment policy of upstream enterprises may cause dealers to replenish inventory or stock up in advance.

It is noteworthy that, according to a source, East ivy chemical company, a major supplier of mesophenylenediamine in China with an annual capacity of 15,000 tons, resumed production at the end of May this year and recently stopped production. The reason is that East ivy chemical company was found to have serious problems in safety management, safety investment and personnel training and education during the “Casting Safety 2020″ inspection in Sichuan province, and was asked to stop production in July and complete the rectification and acceptance before October 9. The resumption of production has triggered concerns about the stability of supply of mesophenylenediamine.

Orders from downstream dyeing and printing mills are already recovering, so their consumption of raw materials is also growing, prompting them to passively replenish their stocks. And after the two price increases in August and September, downstream customers will also have the fear that the price will continue to rise, so this period of time they will go to lock part of the late raw material supply, leading to the recent purchase intention to improve.

mit-ivy industry report, At present, China is the largest producer of dyes, dye enterprises are mainly concentrated in Zhejiang, Jiangsu and Shanghai, the three main origins, its production and export of dyes accounted for more than 90% of the national market volume. The leading manufacturers are Mit-ivy Industry Company, Runtu, Yabang, Jihua Group, Anocy, etc., which have the right to speak in the market.

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mit-ivy industry company

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As one of China’s top 500 manufacturing companies, Mit-ivy Industry Company has an annual production capacity of 300,000 tons of dyestuffs and 100,000 tons of additives, making it the world’s largest dyestuff manufacturer. With 80,000 tons of production capacity and nearly 20,000 tons of other dyes, it has the second largest share of the domestic dye market. Jihua Group, which ranks third in the industry in terms of disperse dyes production, currently has a capacity of 70,000 tons of disperse dyes, 15,000 tons of reactive dyes and 10,000 tons of other dyes.

According to an analysis by Inner Mongolia Chemical Industry WeChat, the price of disperse dyes is at its lowest point in the past three years, while reactive dyes are at their lowest point in the past 10 years. With most dye companies on the verge of losses, price hikes are the only way to save themselves. In the future, there is still room for price increases in the disperse dye market, and printing and dyeing enterprises are advised to stock up in advance.

Environmental protection engineering facilities, a matter of survival and development

Dyeing and printing companies need to choose the right technology

Deep COD removal and decolorization of printing and dyeing wastewater

Dyeing wastewater is one of the main harmful industrial wastewaters, mainly from the production of dyestuffs and dye intermediates, consisting of mother liquor from the crystallization of various products and intermediates, materials lost in the production process and wastewater from washing the ground. As the printing and dyeing industry continues to grow, its production wastewater has become a major source of water pollution.

According to the technical staff of Jiangsu Hapu Functional Materials Co., Ltd, China is a large dyestuff producing country, and the textile dyestuff industry has been developing rapidly in recent years, with China’s output of various dyestuffs reaching 900,000 tons, accounting for about 60% of the world’s dyestuff production. According to the different characteristics of dyes, dyes can be classified into different categories, according to their chemical structure: azo dyes, anthraquinone dyes, indigo dyes, sulfur dyes, quinine dyes, triarylmethane dyes, heterocyclic dyes.

However, wastewater containing these water-soluble reactive dyes is also one of the difficult wastewaters to treat, and traditional water treatment processes are not very effective in treating these dyes. Most of the dyes containing heavy metals contain chromium, which is carcinogenic, disperse dyes do not exist as ions in solution, many disperse dyes are bioaccumulative, and disperse dyes are chemically stable and poorly biodegradable, therefore, traditional water treatment biological treatment systems are not very effective in removing disperse dyes

I. Characteristics of printing and dyeing wastewater

In the production process of dyestuff, such as sulfonation, nitrification, diazotization, reduction, oxidation and acid (salt) segregation, a large number of pollutants are produced.

It is estimated that 90% of the inorganic raw materials and 10%~30% of the organic raw materials in the production of dyestuffs are transferred to water.

Dye wastewater has the following characteristics.

(1) Most of the organics in the wastewater are benzene, naphthalene, anthracene, quinone and other aromatic groups as the parent material, and with a dominant color group, very dark, with a chromaticity of 500-500000, which is highly polluting.

(2) Dye substances and intermediate molecules often contain polar groups, which enhance water solubility and result in large losses of substances due to the production process and molecular structure.

(3) Dye wastewater is often acidic, but also alkaline, and generally contains high salt content.

(4) The increasing demand for colourful colours, the increasing variety of dyestuffs, and the development of resistance to photolysis, oxidation and biodegradation make these wastewaters more and more difficult to be treated by general water treatment systems.

(5) The color and luster of dyeing wastewater is generally dark, and the biochemical property is poor. In addition, the wastewater in the printing process contains a large number of dyestuffs and auxiliaries as well as a large number of slurries, so the BOD5 and COD of wastewater are relatively high.

Second, the treatment of printing and dyeing wastewater

1. Membrane separation method

Membrane separation method is the use of special films on the liquid selective permeability of certain components of the method of general, commonly used membrane separation methods are dialysis, electrodialysis, ultrafiltration and reverse osmosis, but the membrane separation technology due to the concentration of differential polarization, membrane pollution and the price of expensive membranes, the replacement frequency is faster, so that the treatment cost is higher, thus seriously hindering the membrane separation technology for larger-scale industrial applications.

2. Extraction method

Extraction method to treat dye wastewater is the use of insoluble or insoluble in water solvent to extract the dye molecules from the water. Commonly used extraction methods are solution extraction, electrophoretic extraction, liquid membrane method.

3. Radiation method

Microwave radiation is the radiation method commonly used in the treatment of dye wastewater, but the main challenge of this technology is used to produce high-energy particles of expensive devices, high technical requirements, and the method of large energy consumption, energy utilization rate is low; in addition to avoid the harm of radiation on the human body, but also need special protective measures. Therefore, the law to be put into operation, also need to carry out a lot of research and exploration work.

4. Oxidation method

Oxidation method is also a common method for wastewater treatment containing dyestuff, mainly including high temperature deep oxidation method, chemical oxidation method and photocatalytic oxidation method.

5. Coagulation

Coagulation is a common method of wastewater treatment, mainly coagulation and sedimentation method, coagulation and air flotation method.

6. Biological methods

The biological method is widely used in dye wastewater. The biological method has the advantages of good treatment effect and low operating cost, but due to technical reasons, the method is unstable and not widely applicable, and is greatly influenced by external factors, so it has been restricted in practical application to a certain extent.

7. Adsorption method

The adsorption efficiency is influenced by many physicochemical factors, such as dye – adsorbent interaction, specific surface area of the adsorbent, particle size of the adsorbent, temperature, pH value and adsorption time.

Requirements of industrial customers

The nature of dye wastewater is such that it cannot be treated by traditional methods to meet the discharge standards, therefore, the adsorption method developed by Hapu Functional Materials can be used to treat this type of wastewater to achieve a balance between treatment effect and economic cost.

The wastewater treatment needs of enterprise customers who generate dye wastewater include the following three points.

(1) Efficient and stable removal of COD and chromaticity from wastewater treated to below the discharge limit.

(2) Low one-time investment costs, low operating costs and easy operation and maintenance of equipment.

(3) Advanced and reliable process, no secondary pollution.

D. Hapo printing and dyeing wastewater treatment process manufacturers and application cases

The principle of Hapu adsorption process is to selectively adsorb the components or substances to be removed by using the special adsorbent developed by our company, and when the adsorption is saturated, the adsorbent will be desorbed by using a specific desorbent to regenerate the adsorbent.

Hapo printing and dyeing wastewater treatment process manufacturers and application cases

1. An enterprise in Shandong Province requires the COD content in the treated wastewater to be lower than 500mg/L. The experimental treatment effect shows that the COD in the wastewater can be stably lower than 500mg/L by using adsorption treatment.

The adsorption treatment effect of dye wastewater is shown in the table.

The COD in the wastewater can meet the emission requirements after the adsorption treatment. This enterprise has adopted the adsorbent and process package of Jiangsu Hapu Functional Materials Co.

The wastewater produced in the production process of a printing and dyeing enterprise, after biochemical and various filtration, the COD of the effluent is still far higher than the emission requirements and the color intensity is high, so further treatment is required. The wastewater is tested with special adsorbent materials of Hapu, and the results show that the indestructible organics in the wastewater can be purposely separated from the wastewater and the adsorbed effluent can meet the emission standards.

A textile enterprise can produce ~2500t wastewater every day in the production process. The policy stipulates that the wastewater reuse rate of the printing and dyeing industry must reach 60%, and the existing wastewater treatment process of this enterprise has excessive biochemical tail water COD and cannot reach the reuse standard.

According to the production needs of the enterprise, the wastewater can be treated by using Hapu’s special adsorbent materials together with the adsorption process to meet the reuse requirements, which can solve the wastewater treatment problems of the enterprise and at the same time reduce the cost of wastewater outsourcing treatment and the cost of replenishing new water, which has obvious economic value.

Actual case of application of adsorbent for printing and dyeing wastewater treatment

field application

V. Hapu’s core advantages

The current methods of treating dye wastewater have their own shortcomings, both in terms of the treatment effect and their operating costs.

Membrane separation method has the problems of membrane pollution and expensive membrane, fast replacement frequency and high treatment cost.

The disadvantage of the extraction method is the large consumption of extractant, and extractant separation is more difficult, high cost per ton of water treatment, can not be large amounts of continuous treatment.

Radiation method is not yet mature technology, energy consumption, energy efficiency is low; in addition to avoid the harmful effects of radiation on the human body, but also need special protective measures.

The coagulation, oxidation and biological methods cannot meet the discharge requirements at once, and they cannot be discharged in a stable manner.

On the other hand, the adsorption method can effectively remove the organics from the dye wastewater to below the discharge limit value, which is an economical and effective method to treat the dye wastewater.

The advantages of the adsorption method include the following.

(1) Stable compliance with emission standards, which can effectively alleviate the pressure on enterprise environmental protection.

(2) Conduct experiments on samples of wastewater generated on site, design the adsorption process based on technology and experiments, and achieve a high degree of matching between wastewater and process.

(3) The equipment occupies an economical area, has a compact structure and low investment in civil construction and equipment; the desorbent is applied several times and thickened step by step, with high utilization rate of the agent and low operating cost.

(4) Modular components can be realized in the form of modules, which can be flexibly adjusted according to production capacity and are easy to install.

(5) Advanced and mature technology, no secondary pollution, with strong technical strength and rich experience in engineering applications.

whatsapp:+86 13805212761 = wechat

http://www.mit-ivy.com

mit-ivy industry company

info@mit-ivy.com

With premium quality and price and welcom