Pyrocatechin and hydroquinone production process

A technology for hydroquinone and catechol, applied in the field of catechol and hydroquinone production technology, can solve the problems of huge phenol separation work, high energy consumption and high cost, and achieves easy industrial automation and large scale. The effect of large-scale production, easy control of process conditions and low production cost
CN1962593AInactive Publication Date: 2007-05-16王在军
0 Cites 14 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
王在军
Publication Date
2007-05-16
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a cleaning preparing technique to manufacture catechol and hydroquinone, which comprises the following steps: adopting o (p-)-nitrochlorobenzene as raw material; pressurizing the sodium hydroxide to obtain o (p-)-nitrophenol through hydrolyzing; hydrogenating under nickel catalyst; producing the product under acid catalyst in the water dielectric; avoiding high-salt and nitro waste water effectively as well as high-density hydrogen dioxide solution.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of fine chemical industry and relates to a production process of fine chemical intermediates, in particular to a clean and pollution-free production process of catechol and hydroquinone. Background technique

[0002] Catechol is an important intermediate for the production of high-efficiency new carbamate pesticides carbofuran (carbofuran), propoxur, and diethofencarb, and is also an important raw material for the production of spices piperonal and vanillin. Catechol is also in demand in the fields of agents, photosensitive materials, medicines, dyes, etc.

[0003] Hydroquinone is mainly used in the synthesis of photosensitive materials, anthraquinone, fertilizer additives, polymerization inhibitors for synthetic materials, antioxidants and rubber additives.

[0004] At present, the main production processes of catechol and hydroquinone are as follows:

[0005] 1. Hydrolysis of o-chlorophenol to produce catechol: ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More