Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of fumaric acid production process

A production process, technology of fumaric acid, applied in the direction of carboxylate preparation, organic compound/hydride/coordination complex catalyst, organic compound preparation, etc., can solve the problem of yellow color of finished fumaric acid and difficult Degradation, wastewater treatment and discharge difficulties, etc., to achieve the effect of reducing individual costs

Active Publication Date: 2015-09-30
HUAIBEI JINGYUAN BIOLOGICAL PROJECT CHEM
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the process of producing fumaric acid, the traditionally used catalyst is an organic compound-thiourea, and a certain amount of sulfuric acid is added in the actual reaction process to improve its catalytic activity, which will seriously corrode the equipment, and the obtained finished product is rich The color of malic acid is yellow, and the thiourea in the production wastewater is difficult to degrade, which brings great difficulties to the subsequent treatment and discharge of wastewater

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ①, set the volume to 6M 3 The maleic acid aqueous solution is added in the decolorization kettle, and the active carbon that is 0.1% by weight relative to the maleic acid aqueous solution is added simultaneously for stirring and decolorization, and the decolorization time is 20 minutes;

[0022] ②. Filter the decolorized maleic acid aqueous solution to remove activated carbon and impurities, and then pump it into the reaction kettle;

[0023] ③. Measure the volume of acid water in the reactor, calculate the maleic acid content according to the measured acid water concentration, and control the acid water concentration at 35%;

[0024] 4. Stir and heat the reaction kettle, when the temperature is at 45°C, add urea with a relative acidic maleic acid weight of 0.5%, and the reaction time is 10 minutes;

[0025] ⑤. After continuing to raise the temperature by 2°C, add diammonium hydrogen phosphate with a maleic acid weight of 0.6 relative to acid water, close the steam val...

Embodiment 2

[0030] ① Set the volume to 9M 3 The maleic acid aqueous solution is added in the decolorization kettle, and the active carbon that is 0.3% relative to the maleic acid aqueous solution weight ratio is added simultaneously for stirring and decolorization, and the decolorization time is 40 minutes;

[0031] ②. Filter the decolorized maleic acid aqueous solution to remove activated carbon and impurities, and then pump it into the reaction kettle;

[0032] ③. Measure the volume of acid water in the reactor, calculate the maleic acid content according to the measured acid water concentration, and control the acid water concentration at 40%;

[0033] 4. Stir and heat the reaction kettle, when the temperature is at 65°C, add urea with a maleic acid weight of 1.8% in relative acid water, and the reaction time is 20 minutes;

[0034] 5. After continuing to heat up 8°C, add diammonium hydrogen phosphate with a weight of 2% maleic acid in relative acid water, close the steam valve, and t...

Embodiment 3

[0039] ① Set the volume to 9M 3 The maleic acid aqueous solution is added in the decolorization kettle, and the active carbon that is 0.3% relative to the maleic acid aqueous solution weight ratio is added simultaneously for stirring and decolorization, and the decolorization time is 40 minutes;

[0040] ②. Filter the decolorized maleic acid aqueous solution to remove activated carbon and impurities, and then pump it into the reaction kettle;

[0041] ③. Measure the volume of acid water in the reactor, calculate the maleic acid content according to the measured acid water concentration, and control the acid water concentration at 38%;

[0042] 4. Stir and heat the reaction kettle, when the temperature is at 60°C, add urea with a relative acidic maleic acid weight of 1.5%, and the reaction time is 18 minutes;

[0043] 5. After continuing to raise the temperature by 8°C, add diammonium hydrogen phosphate whose weight of maleic acid is 1.8% in relative acid water, close the stea...

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

PUM

No PUM Login to View More

Abstract

The invention discloses a fumaric acid production technology. The technology comprises the following steps: carrying out stirring and decoloring treatment on an aqueous solution of maleic acid, filtering to remove activated carbon and impurities, sequentially adding urea and a diammonium hydrogen phosphate catalyst, and reacting; and centrifuging, discharging, drying, and packaging. The technology has the advantages of good chroma of produced fumaric acid, high catalytic efficiency, and realization of the emission of inorganic salts residual in wastewater without degradation.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a fumaric acid production process. Background technique [0002] Fumaric acid is a colorless, flammable crystalline, carboxylic acid derived from butene. At present, in the process of producing fumaric acid, the traditionally used catalyst is an organic compound-thiourea, and a certain amount of sulfuric acid is added in the actual reaction process to improve its catalytic activity, which will seriously corrode the equipment, and the obtained finished product is rich The color of malic acid is yellow, and the thiourea in the production wastewater is difficult to degrade, which brings great difficulties to the subsequent treatment and discharge of wastewater Contents of the invention [0003] In order to overcome the above-mentioned deficiencies, the present invention provides a kind of fumaric acid production process using composite inorganic salt as a heterogeneou...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C57/15C07C51/353B01J31/02
CPCC07C51/353C07C57/15
Inventor 张培红
Owner HUAIBEI JINGYUAN BIOLOGICAL PROJECT CHEM