CN1256954A

CN1256954A - Deodorisation filter agent

Info

Publication number: CN1256954A
Application number: CN 98125238
Authority: CN
Inventors: 郝石光成; 王家鸿; 阎旭; 张伟
Original assignee: SANLING ENVIRONMENTAL PROTECTION TECHNOLOGY INST TIANJIN
Current assignee: SANLING ENVIRONMENTAL PROTECTION TECHNOLOGY INST TIANJIN
Priority date: 1998-12-17
Filing date: 1998-12-17
Publication date: 2000-06-21

Abstract

The present invention relates to a cleaning agent for deodorization, in particular, it is a cleaning agent for removing affensive odors, such as ammonia, hydrogen sulfide and thiols, etc. which can be produced in living environment. It is a composite formed from ascorbic acid and ferrous compound, in which the ferrous compound can be ferrous sulfate or ferrous chloride or ferrous nitrate,a nd then the active carbon carrier or paper or cloth carrier can be impregnated with said composite solution so as to obtain the invented cleaning agent with stable property, good safety and reliability, and high deodorization efficiency.

Description

Take off malodorous filtering agent

The present invention relates to a kind of filtering agent, especially refer to remove the stench in the living environment, as: the filtering agent of ammonia, hydrogen sulfide, thio-alcohol.

At present, handle the apparatus structure complexity of industrial foul gas, volume is big, operation is trouble also, being unsuitable for family or public environment uses, and general public environment, as: lavatory, refuse bin, mainly be to adopt spice encapsulation method or active carbon adsorption or utilize odorant and acid or alkali reaction acid-base neutralization method or utilize odorant and citric acid (2-hydroxy propane-1,2, the 3-tricarboxylic acids), the main component generation chemical reaction method of maleic acid (maleic acid), reach and remove malodorous purpose.But there is defective in various degree in they, as the spice encapsulation method, just insert other gases and mix with stench, can not remove stench at all; Active carbon adsorption and for example, receptor 1 activity charcoal restricted number, and the activated carbon adsorption amount state that can reach capacity gradually need constantly be changed active carbon; Also have the acid-base neutralization method, have only and just can remove with the odor pollutant of acid or alkali reaction; Moreover, citric acid and maleic acid chemistry method, only more effective to ammonia in the odor pollutant and amine, and to the thio-alcohol nearly unavailable, and acid-base neutralization method, citric acid and maleic acid chemistry method itself are difficult for again preserving, and (resting period increases at any time, deodorising effect descends and aggravates), also harmful to human body simultaneously.

In view of this, the purpose of this invention is to provide a kind of malodorous filtering agent of taking off, it can rise for multiple odorant and dispel effect, and performance own has stable deodorising effect, is the direct safe material of contact food simultaneously.

The object of the present invention is achieved like this: it is the compositions of ascorbic acid and ferrous compound, and wherein ferrous compound is ferrous sulfate or ferrous chloride or ferrous nitrate.

It is that the composition solution Immesion active carbon of ascorbic acid and ferrous compound is that carrier forms, and wherein ferrous compound is ferrous sulfate or ferrous chloride or ferrous nitrate.

It is that the composition solution impregnated paper or the cloth of ascorbic acid and ferrous compound is that carrier forms, and wherein ferrous compound is ferrous sulfate or ferrous chloride or ferrous nitrate.

Ferrous ion in the described ferrous compound and ascorbic acid weight ratio are 1: 0.02～0.3.

The concentration weight ratio of the composition solution of described ascorbic acid and ferrous compound is 0.1～30%.

Have a spot of ascorbic acid in the filtering agent of the present invention, activated state that just can the long term maintenance ferrous ion can form chela and thing with ammonia, can form Fe-S with the sulfur-containing foul composition.So ammonia, hydrogen sulfide and thio-alcohol stench are had the high efficient of dispeling;

The ferrous ion in the filtering agent ferrous compound of the present invention and the ratio of ascorbic acid are 1: 0.02～0.3 (weight ratio), the preferable scope of effect is 1: 0.03～0.1 (weight ratio), if the ascorbic acid consumption surpasses the upper limit, chemical compound is prone to purple, and the ascorbic acid consumption is lower than the scope lower limit, and deodorising effect can not be given full play to and the poor stability of ferrous ion; Can be as for the concentration of filtering agent aqueous solution by its purposes and environment for use and different, ascorbic acid was 0.1～30% (by weight) with the concentration of ferrous compound usually, generally concentration is 1.0～20% preferable.

Usually for 100 gram absorbent charcoal carrier (powder or granular active carbon; also available zeolite, bentonite replace) with the filtering agent aqueous solution of the above-mentioned concentration range of 10-20% weight; if filtering agent liquid consumption is too small; predetermined deodorising effect does not reach; if filtering agent liquid consumption is too much; carrier can not fully adsorb, and causes waste.

Usually for the filtering agent aqueous solution (determining) that with paper or cloth is carrier impregnation 0.5～20% (by weight) by purposes and using method, form this paper or the cloth that contains ascorbic acid and ferrous compound, long-term placement is easy to change, can prevent variable color if add an amount of thiosulfate (as: sodium thiosulfate) or dithionite (as: sodium dithionite).

Filtering agent aqueous solution of the present invention and carrier (active carbon, paper or cloth) stable performance, can long preservation in air, and can also deodorize in wet environment, especially directly contact food makes the people relieved, as: the freezer that the paper of dipping filtering agent liquid or cloth are used for food such as meat, fish prevents stench.

The present invention elaborates with the following example.Embodiment 1

27.5g makes the 100ml aqueous solution with the ferrous sulfate that contains 7 hydrones (molecular weight 278.03), adds ascorbic acid 0.5g, and dissolving is mixed with the iron ascorbat aqueous solution.

10 times of above iron ascorbat aqueous solution thin ups are modulated into liquid filtering agent.

Get two 100ml Drexel bottles below and respectively put into the 10g chicken manure, one adds entry, and another adds the filtering agent 50ml of above-mentioned preparation, places 37 ℃ of thermostatic chambers 24 hours.In two Drexel bottles, feed the pure air of 20l then respectively and blow out the gas that takes place in the bottle, collect hydrogen sulfide, thio-alcohol and ammonia in the mist (gas and untreated gas that deodorize is handled), measure respectively with airbag.As a result shown in the table 1.Embodiment 2

Granular active carbon (commercial powder active carbon 20% weight ratio, zeolite 20%, bentonite 60%, mix extrusion molding, dry then, make the granule that particle diameter is 1.5～2.5mm with usual method) with iron ascorbat aqueous solution stock solution 15% (weight ratio) the room temperature impregnation of embodiment 1 allotment 24 hours, make graininess filtering agent after the drying.

Get a 100ml Drexel bottle, put into chicken manure 20g, add distilled water 100ml, be positioned in 37 ℃ of thermostatic chambers 24 hours.Feed the pure air of 20l and blow out the gas that takes place in the bottle, collect with airbag.Get aforementioned particles shape filtering agent 20g then and be filled in the glass tubing, feed with 2～3l/min flow velocity with the gas 20l that collects in the airbag.Measure gas in the airbag, measurement result is as shown in table 1.

Table 1 result shows that liquid state of the present invention and graininess filtering agent have the high effect of dispeling to odor pollutants such as hydrogen sulfide, methanthiol, ammonia.

Table 1

	Odor pollutant	Odor pollutant concentration (ppm)		Deodorize rate (%)
		Odor pollutant concentration (ppm)			Be untreated	After the processing
		Embodiment 1	Hydrogen sulfide methanthiol ammonia		Be untreated	After the processing	????38.2 ????36.1 ????273	????0.04 ????0.02 ????0.33	????99.9 ????99.9 ????99.9
Embodiment 2	Hydrogen sulfide methanthiol ammonia	Embodiment 1	Hydrogen sulfide methanthiol ammonia	????25.7 ????7.91 ????250	????＜0.01 ????＜0.01 ????0.01	????＞99.9 ????99.9 ????＞99.9	????38.2 ????36.1 ????273	????0.04 ????0.02 ????0.33	????99.9 ????99.9 ????99.9

(notes) odor pollutant assay method is as follows

(1) hydrogen sulfide and methanthiol: gas chromatography quantitative assay;

(2) ammonia: ammonia absorption liquid (1/50N-H2SO4 liquid) is used the absorption photometric method quantitative measurement after collecting.Embodiment 3

Get embodiment 1 synthetic iron ascorbat aqueous solution stock solution (making after 3 months) and dilute with 2 times of tap waters, quantitatively be sprayed on the paper that diameter is 15cm (on Japan's filter paper-No.5C), dry back iron ascorbat adhesion amount (A) 0.38g; (B) 0.39g; (C) 0.37g; (D) 0.48g, so far deodorize paper is made.

Be made into the ammonia test solution for 4 times with the dilution of 25% ammonia.Other gets 5 filter paper impregnation 1ml test solutions respectively, and filter paper is placed 5 500ml polyethylene bottles respectively, then above-mentioned (A)-(D) four kinds of deodorize paper combinations is placed result such as the table 2 that foul smell changes behind 5 containers sealing certain hours respectively.

The result of table 2 shows that deodorize paper of the present invention has good deodorization functions to ammonia.

Table 2

Experiment numbers	Filtering agent (paper)	Ammonia
		Ammonia			After 1 hour	After 3 hours	After 24 hours
		????1 ????2 ????3 ????4 ????5	A+B C 1/2D 1/4D does not have	The atomic smelly odorless of odorless is strong smelly smelly by force	After 1 hour	After 3 hours	After 24 hours	Odorless odorless odorless is strong smelly smelly by force	Odorless odorless odorless smelly by force (weak slightly) is smelly by force

Claims

1, a kind ofly take off malodorous filtering agent, it is characterized in that: it is the compositions of ascorbic acid and ferrous compound, and wherein ferrous compound is ferrous sulfate or ferrous chloride or ferrous nitrate.

2, a kind ofly take off malodorous filtering agent, it is characterized in that: it is that the composition solution Immesion active carbon of ascorbic acid and ferrous compound is that carrier forms, and wherein ferrous compound is ferrous sulfate or ferrous chloride or ferrous nitrate.

3, a kind ofly take off malodorous filtering agent, it is characterized in that: it is that the composition solution impregnated paper or the cloth of ascorbic acid and ferrous compound is that carrier forms, and wherein ferrous compound is ferrous sulfate or ferrous chloride or ferrous nitrate.

4, take off malodorous filtering agent by claim 1 is described, it is characterized in that: ferrous ion in the described ferrous compound and ascorbic acid weight ratio are 1: 0.02～0.3.

5, describedly take off malodorous filtering agent by claim 2 or 3, it is characterized in that: the concentration weight ratio of the composition solution of described ascorbic acid and ferrous compound is 0.1～30%.