Benzene phenols and other substances extracted from petroleum by chemical methods, most can make people sick, such as the vast majority of dyes have this benzene ring, a few years ago Europe and the United States proposed that some dyes can cause cancer, listed some prohibited dyes, their people can not use these carcinogens. Therefore, some experts have proposed that undyed underwear is beneficial to health, and various colored cotton products have also become popular, reflecting people's attention to environmental protection and health.
Amine:
Amines are widely distributed in nature, most of which are produced by amino acid decarboxylation. The method of industrial preparation of amines is mostly by the reaction of ammonia with alcohol or halogenated alkane, the product is a mixture of various levels of amines, and the pure product is obtained after fractionation. The corresponding amines can also be obtained by catalytic reduction of aldehydes and ketones in the presence of ammonia. Amine compounds are also produced by catalytic reduction of nitro compounds, nitrile, amide or heterocyclic compounds containing nitrogen in industry.
Amines have many uses. The earliest development of the dye industry is based on aniline. Some amines are necessary to maintain life activities, but some are very harmful to life, many amine compounds have carcinogenic effects, especially aromatic amines, such as naphthylamine, benzidine and so on.
The structure of the nitrogen atom in the amine, much like the nitrogen atom in the ammonia molecule, is connected to the hydrogen or hydrocarbon group by three sp hybrid orbitals, forming a pyramid, leaving one sp3 hybrid orbital occupied by a lone electron pair.
Second, domestic garbage
Solid waste refers to solid waste generated by people in their daily life or activities providing services for daily life, as well as solid waste that is regarded as solid waste by laws and administrative regulations. It mainly includes household garbage, market trade and commercial garbage, garbage in public places, street cleaning garbage and garbage of enterprises and institutions. China has issued the "classification of domestic waste" to make a detailed classification of domestic waste.
Third, the difference between biomass power generation and domestic waste power generation
1. The project nature of biomass power generation and domestic waste power generation is different
1) Project nature is different
Although the rules of biomass power generation and household waste power generation are the same in many aspects, ① are enterprise investment and financing construction and operation, ② must comply with the land use control system and planning management system, ③ according to the application, acceptance, review, decision process administrative approval, ④ enjoy financial subsidies (preferential electricity prices and local financial subsidies for processing fees), but the nature of the two is different. Biomass treatment is a private project, mainly pursuing economic benefits; Domestic waste treatment is a public welfare project, mainly pursuing public interests. Because of the different nature of the project, its organizational responsibility subject and the nature of the contract are also different.
2) The project organization subject is different
Biomass treatment is organized by the biomass producer, and domestic waste treatment is organized by the administrative organ, which has been stipulated in the Solid Waste Law (the Second Amendment in 2020). For straw, Article 64 of the Solid Waste Law (Second Revision in 2020) stipulates that the competent agricultural and rural departments of governments at or above the county level are responsible for guiding the construction of the agricultural solid waste recycling and utilization system, and article 65 stipulates that units and other producers and operators that produce agricultural solid waste shall take recycling and other measures to prevent environmental pollution; However, for domestic waste, Article 48 of the Solid Waste Law (Second revision in 2020) clearly stipulates that the environmental health and other competent departments of the local people's governments at or above the county level shall organize the cleaning, collection, transportation and treatment of urban and rural domestic waste, and can choose qualified units to engage in the cleaning, collection, transportation and treatment of domestic waste through bidding and other means. This is a legal provision made on the basis of weighing the private interests of agricultural solid waste disposal and the public interests of domestic waste disposal.
3) The nature of the project contract is different
The biomass power generation contract is an enterprise contract, and the domestic waste power generation contract is an administrative agreement (administrative contract). Since biomass power generation mainly pursues private interests (protecting private interests and balancing private interests and public welfare), and the main body of organizational responsibility is the biomass producer, then the biomass power generation project contract is the enterprise contract between the biomass producer and the processor, and the administrative organ has no administrative advantage right; Domestic waste power generation is different. First, it is a public welfare project (protecting public welfare and balancing private interests), and the second is that administrative organs have organizational responsibilities. In this case, administrative organs have the administrative superiority right granted by the Administrative Licensing Law. The contract for the domestic waste power generation project is an administrative agreement (administrative contract).
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