Trans 1, 3-dichloropropene and cis 1, 3-dichloropropene compound, and technological process

Abstract

The invention discloses trans 1, 3-dichloropropene and cis 1, 3-dichloropropene compound, and technological process thereof, and belongs to the field of chemical technology. According to the technological process, three column continuous or four column continuous integral technology is adopted, an adopted first column is a crude extracting column, wherein a black raw material DD mixture (industrial dichloropropane) is converted to be white from black in the first column, and then is introduced into a second column; the second column is a weight-removing column, and is used for removing weightfractions in the discolored material obtained after passing of the raw material DD mixture through the crude extracting column, after weight removing, the material is introduced into a third column for production; the third column is a light-removing column, wherein after weight removing, the material is introduced into the third column for light removing, 1, 2-dichloropropene is removed, and sideline discharging is adopted for collection of trans 1, 3-dichloropropene and cis 1, 3-dichloropropene at the same time or collection of only cis 1, 3-dichloropropene; and a fourth column is a repeatlight removing column. Replacement of chemical products which are not beneficial for environmental protection is realized; insect and disease prevention rate is high; and it is beneficial for crop growth.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to trans-1,3-dichloropropene and cis-1,3-dichloropropene compounds and a process flow thereof. Background technique [0002] There are several types of plant-parasitic nematodes that cause enormous economic losses. The most common genera are: Aphelenchoides, Meloidogyne, Heterodera, Globodera, Nacobbus, Pratylenchus, Stem nematode ( Ditylenchus), Xiphinema, Longidorus, Trichodorus, etc. Some plant-parasitic nematodes damage the tissue of plant roots and may form visible galls (root-knot nematodes), which are very useful indicators for their diagnosis. Some nematodes infect plant viruses as they feed on plants. One example is the dagger nematode (Xiphinema index), Grapevine Fanleaf Virus (GFLV), a very important carrier of grapevine diseases. [0003] The losses caused by underground nematodes to crops are more accurate and predictable than other pests and d...

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Problems solved by technology

[0003] The losses caused by underground nematodes to crops are more accurate and predictable than other pests and diseases. Nematodes can cause vegetables, peanuts, soybeans, tobacco, sugar cane, citrus, sweet potatoes, wheat, rice and other crops to be harmed to varying degrees. big loss

[0004] At present, most of the pesticides used to control underground nematodes are very toxic. Methyl bromide produces bromine during use and destroys the bromine oxygen layer in the atmosphere. Methyl bromide has been clearly banned in the United Nations Hormon Convention; the use of methyl bromide as soil fumigation will be completely banned in 2020 pesticides and soil pesticides; large amount of control, high input costs, and difficult control operations have become urgent problems to be solved in today's agricultural development.

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