Formula and preparation method of oily sludge demulsifier

The invention discloses a formula and a preparation method of an oily sludge demulsifier. The oily sludge demulsifier is prepared from mixing the following components in percent by weight: 11 percent to 20 percent of citric acid A, 3.5 percent to 10 percent of emulsifier, 25 percent to 35 percent of penetrating agent, 6.5 percent to 15 percent of ethylenediamine tetraacetic acid, 1.5 percent and 5 percent of inorganic salt, 5 percent to 8 percent of sodium silicate, 0.5 percent to 5 percent of alkali, and the balance of water, wherein the sum of the weight percentage of the components is 100 percent. Compared with the prior art, the formula provided by the invention is scientific in matching, simple in process and low in manufacturing cost. The oily sludge demulsifier provided by the invention is used for oily sludge treatment, and capable of reducing oily sludge pollution and improving the effective availability of petroleum hydrocarbon, and can provide technical reserve for soil remediation in the future. 本