Method for producing calcium formate by using industrial waste liquid

An industrial waste liquid, calcium formate technology, applied in the preparation of carboxylate, alkali metal chloride, organic chemistry and other directions, can solve the problems of high production cost, waste of resources, environmental pollution, etc., and achieve low production cost, environmental protection, The effect of saving resources

Inactive Publication Date: 2010-03-03
SHANDONG XINGHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The production method of calcium formate in the prior art has complicated process and low yield, and the quality index is difficult to meet the needs of users of feed additives. The production cost is high and the price cannot meet the needs of users of building materials and road construction enhancers.
[0004] During the production process of hydroxylamine hydrochloride, the nitromethane hydrochloride acidification and hydrolysis production unit produces a large amount of waste liquid containing formic acid, which wastes resources and pollutes the environment. It needs to be opened for utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The production of calcium formate whose quality index meets the requirements of feed additive users includes the following steps:

[0045] a. extract formic acid solution, by-product sodium chloride:

[0046] ① Extraction of formic acid solution:

[0047] Put 2500 kg of acidified hydrolysis waste liquid containing 18wt%-32wt% of formic acid and 5wt%-15wt% of hydrochloric acid into the reactor, add 700 kg of 80%-85% sodium formate aqueous solution under stirring, heat, under negative pressure conditions, through distillation, After condensation, the formic acid aqueous solution is collected for subsequent use;

[0048] ② Preparation of by-product sodium chloride:

[0049] After step 1, the residue in the still after distillation is separated by centrifugal filtration, and the filter cake is dried by sodium chloride and sold as a by-product;

[0050] b. Calcium formate synthesis:

[0051] Put the formic acid solution prepared in step a into the calcium formate synthes...

Embodiment 2-4

[0055] According to the method and step of embodiment 1, meet the calcium formate that the feed additive user requires according to the relevant technical index production quality index of table 1

[0056] Table 1

[0057] Raw materials and output

Embodiment 5

[0059] The production of calcium formate suitable for the needs of users of building materials and road construction enhancers includes the following steps:

[0060] a. Calcium formate synthesis:

[0061] Directly put 2,500 kilograms of acidified hydrolysis waste liquid containing 18wt%-32wt% of formic acid and 5wt%-15wt% of hydrochloric acid into the calcium formate synthesis kettle, slowly add quantitative calcium carbonate powder 800 g, and control the pH between 2.5-6.0; After the end, keep warm for 1-2 hours at a temperature of 95°C-100°C; open the circulating cooling water, cool down to 30°C-35°C, and discharge; centrifuge and dry to obtain calcium formate product; put the mother liquor back into the mother liquor pool for clarification After sucking the supernatant, distilling and recycling;

[0062] b. Quality inspection, packaging and storage after passing the test. 550 kg of product calcium formate were obtained.

[0063]The obtained product is calcium formate sui...

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PUM

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Abstract

The invention relates to a method for producing calcium formate by using industrial waste liquid, which belongs to preparation of carboxylate, in particular to a method for producing the calcium formate by using oxammonium hydrochloride industrial waste liquid as a raw material. The method is characterized in that: in the production technology process of oxammonium hydrochloride, waste liquid containing methanoic acid, which is generated by a nitromethane muriatic hydrolyzation generation device, is used as the raw material; and the method comprises the following operation steps: a. extractingmethanoic acid solution and sodium chloride of a byproduct; b. synthesizing the calcium formate; c. inspecting the quality and packaging and warehousing after qualification. The method for producingthe calcium formate by using the oxammonium hydrochloride industrial waste liquid as the raw material saves resources and protects the environment, has simple process, low production cost and high calcium formate yield, not only can produce the calcium formate meeting the requirement of feed additive users, but also produce the ideal calcium formate which is suitable for building materials and road surface construction strengthening agents and meets the requirement of users.

Description

technical field [0001] The invention is a method for producing calcium formate by using industrial waste liquid. The invention belongs to the preparation of carboxylates, and in particular relates to a method for producing calcium formate by using industrial waste liquid of hydroxylamine hydrochloride as a raw material. Background technique [0002] Industrial calcium formate is widely used in feed additives, building materials, road construction enhancers, leather industry additives, paper industry additives, oil drilling aids, crop growth regulators, etc.; The demand has increased substantially. [0003] The production method of calcium formate in the prior art has complicated process and low yield, and the quality index is difficult to meet the needs of users of feed additives. The production cost is high, and the price cannot meet the needs of users of building materials and road construction enhancers. [0004] During the production process of hydroxylamine hydrochlor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/06C07C51/41C01D3/04
Inventor 高庆辉侯诗东韩己强
Owner SHANDONG XINGHUI CHEM
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