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Production method and system of naphthol AS series products

A technology for a series of products and production methods, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carboxylic acid amides, etc., can solve the problems of energy consumption, high labor costs, production of AS series products, and large losses, etc. Achieve the effect of low production cost, reduced recycling difficulty, and improved market risk capability

Pending Publication Date: 2021-08-27
HUBEI HAOYUAN MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Naphthol AS series products are commonly used raw materials in the dye field. With the existing production process, a set of equipment can only produce one naphthol AS series product. If it is necessary to switch to other AS series products of naphthol, the solvent chlorobenzene used contains Aromatic amine substances cannot be directly used in the production of AS series products after switching. Therefore, all materials need to be replaced or purified, which requires high energy consumption, labor, time and treatment reagent costs, and large losses

Method used

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  • Production method and system of naphthol AS series products

Examples

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Embodiment 1

[0022] A process introduction of the process of producing phenol As-pH, by-product phosphate. Molecular formulas and structural formulas involving organic matter in production of chlorol AS-pH are shown in Table 1 below. Its raw material is 2-hydroxy-3-naphthoic acid, phosphoric acid, phosphorus, wherein trichloride is a condenser. Solvent uses chlorobenzene.

[0023] Table 1

[0024]

[0025] The chemical reaction involved is as follows:

[0026] 3C 11 Hide 8 O 3 + 3C 8 Hide 11 NO + 1PCL 3 → 3C 19 Hide 17 NO 3 + 1h 3 PO 3 + 3HCL ↑

[0027] 2h 3 PO 3 + 1NA 2 CO 3 → 2nah 2 PO 3 + 1h 2 O + 1CO 2 ↑

[0028] Nah 2 PO 3 + CAO → CAHPO 3 ↓ + naoh

[0029] Specific production method is like figure 1 Down:

[0030] S1, solvent chlorobenzene, and phosphorus phosphorus, respectively, the corresponding tank is pumped into the corresponding metering tank, and the quantitative chlorobenzene is added to the dehydrate, and the stirring is opened, the jacket is passed through the steam, and the ...

Embodiment 2

[0038] Production method of tallol AS series, specifically producing phenol As-LC, including the following steps:

[0039] S1, the condensation reaction is solvent 5000 kg of chlorobenzene, adding a dehydrated extract, dehydrated temperature at 115-130 ° C, and the chlorobenzene steam condensation generated in dehydration, part of the chlorobenzene liquid and water into the chlorobenzene separator; then Raw material reactant 2-hydroxy-3-naphthoate 700 kg, 2,5-dimethoxy-4-chloroaniline 695 kg, heating to 60-70 ° C, heating heating to 60-70 ° C, add trichloride The condensation reaction, the phosphorus trichloride dripping 170 kg, the reaction temperature is 120-130 ° C, the reaction time is 3 hours; the resulting chlorobenzene steam during the condensation reaction is refluxed after condensation, and hydrogen chloride gas is absorbed by water injection vacuum unit. After the liquid reaches 30% by weight, the dilute hydrochloric acid is transferred;

[0040] S2, 1000 kg of sodium car...

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Abstract

The invention discloses a production method and system of naphthol AS series products. The specific steps are as follows: S1, taking chlorobenzene as a solvent for condensation reaction, dehydrating the chlorobenzene, adding the dehydrated chlorobenzene into a reactor, then adding raw material reactants of the naphthol AS series products, heating, raising the temperature, and dropwise adding phosphorus trichloride for condensation reaction; and S2, adding sodium carbonate and water into a distillation kettle, then introducing the condensed material in the S1 into the distillation kettle for heating and distilling, removing the solvent chlorobenzene, filtering the rest material, and carrying out flash evaporation drying on the filter cake to obtain the naphthol AS series products. The raw material reactants of the AS series products comprise a reactant A and a reactant B, wherein the reactant A is 2-hydroxy-3-naphthoic acid, and the reactant B can be o-aminophenetole, 2, 5-dimethoxy-4-chloroaniline, o-aminoanisole, parachloroaniline, o-toluidine, m-nitroaniline, menaphthylamine or 5-aminobenzimidazolone. Differentnaphthol AS series products can be obtained by selecting different reactants B according to needs.

Description

Technical field [0001] The present invention relates to the field of fine chemicals, and in particular to a production method and system of a tantroid AS series product. Background technique [0002] The chlorol AS series products are commonly used raw materials in the field of dyes. Existing production processes, a set of equipment can only produce a color phenol AS series product, if you need to switch other AS series products of colorphen, the solvent chlorobenzene is contained in Aromamromalma materials cannot be used directly for the production of Switching AS series products, and therefore, it is necessary to replace or purify the materials, the energy consumption, labor, time and treatment reagents are high, and the loss is large. Inventive content [0003] The present invention provides a production method and system of a monolith series product, using the same system to produce multi-varieties of AS series products, product diversification, and product purity can reach ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C235/66C07C231/02C07C231/24C01B25/163
CPCC07C231/02C07C231/24C01B25/163C07C235/66
Inventor 徐献忠
Owner HUBEI HAOYUAN MATERIAL TECH
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